ES1290695U - High-reliability flexible torsion-resistant low-voltage cable and manufacturing method therefor - Google Patents

Abstract

A high-reliability flexible torsion-resistant low-voltage cable and a manufacturing method therefor. Said cable comprises a conductor (11), an insulating layer (12), a semi-conductive tape (13) and a metal braided layer (14). The insulating layer (12) is provided on the outer wall of the conductor (11). The semi-conductive tape (13) is wrapped around the outer wall of the insulating layer (12). The metal braided layer (14) is provided on the outer wall of the semi-conductive tape (13). The cable and a cable manufactured by means of the manufacturing method can efficiently perform electric leakage detection.

Description

DESCRIPTION

Low voltage anti-twist cable which has high reliability and flexibility

Reference to related requests

The present disclosure claims priority to Chinese Patent Application No. 201910395851.3, filed with the Chinese Patent Office (CNIPA) on May 13, 2019, and entitled "Low Voltage Anti-Twist Cable Having High Reliability and Flexibility and Process of manufacture thereof", the content of which is incorporated herein by reference in its entirety.

technical field

The present description relates to the technical field of cables, and in particular, to a low-voltage anti-twist cable having high reliability and flexibility.

Background art

For moving cables, for example, welding machine cables, used in the industry field, the cables must undergo pulling, bending, twisting and other operations when used. Due to the aging of cable materials and the effect of external mechanical stress, the phenomenon of insulation breakdown (detachment of insulation material) will easily occur during the long-term use of cables.

Currently, the conventional insulation break detection procedure is a manual visual inspection. However, manual visual inspection has low efficiency and has a relatively high error rate (or failure rate). As a result, insulation breakdown cannot be detected in time in many cases. In addition, when insulation breakdown occurs, there will be electrical leakage of different degrees. Therefore, there will be potential safety hazards of the equipment, so the safety of the operator cannot be guaranteed.

Characteristics of the invention

The present description provides a low voltage anti-twist cable having high reliability and flexibility. The cable can achieve at least the technical effect of allowing a Efficient detection of electrical leaks.

The present disclosure provides a low-voltage anti-twist cable having high reliability and flexibility, comprising a conductor, an insulating layer, a semiconductive wrapping tape, and a metal braid layer. The insulating layer is provided on an outer wall of the conductor. The semiconductive wrapping tape wraps an outer wall of the insulating layer. The metal braid layer is provided on an outer wall of the semiconductive wrapper tape.

In the above described solution, the present description provides a cable that enables reliable detection of electrical leakage, which can achieve at least the following technical effects: the conductor is protected by the insulating layer, the semiconductive wrapping tape wraps the outer wall of the insulation layer to form a monitoring layer, since the monitoring layer is connected by sheath, the monitoring layer can completely cover the outer wall surface of the insulation layer. The metal braid layer is provided on the outer wall of the semiconductive wrapping tape, on the one hand, the anti-twist and anti-pull performances of the cable are improved by using the metal braid layer, and on the other hand, leak detection can be realized through the metal braid layer, where when the insulating layer is damaged, electrical leakage will occur in the conductor, the semiconducting wrap tape will conduct current to the conductive metal wires in the metal braid layer, and by connecting the conductive metal wires in the metal braided layer with leakage protection device, the conductive metal wires in the metal braided layer can transmit a leakage signal to the leakage protection device to realize alarm or de-energizing operation, thus ensuring the safety and reliability of the cable.

Optionally, a wrap seal of the semi-conductive wrap tape is fixed by a semi-conductive adhesive tape.

In the above described solution, the technical effects include at least the following: the semiconductive wrapping tape is fixed on the insulating layer by a semiconductive adhesive tape, which can guarantee the integrity of the semiconductive wrapping tape and the insulating layer, and also guarantees the conductive property of the monitoring layer formed by the semiconductive wrapping tape in the whole cable.

Optionally, a wrap seal of the semi-conductive wrap tape is glued and fixed by a semi-conductive glue.

In the above described solution, the semiconductive wrap tape is fixed on the insulating layer by applying a semiconductive glue, which ensures the integrity of the semiconductive wrap tape and the insulating layer, and also ensures the conductive property of the monitoring layer formed by semiconductive wrap tape around the cable.

Optionally, one surface of each conductive metal wire in the metal braid layer is tin-plated.

In the above described solution, the technical effects include at least the following: by tinning the surface of each conductive metal wire, the corrosion resistance of the conductive metal wires is improved, and the solderability of the metal wires is also improved drivers.

Optionally, the cable further comprises an outer jacket provided on the outer wall of the braided metal layer.

In the above described solution, the technical effects include at least the following: By providing an outer sheath on the outer wall of the metal braid layer, the cable is allowed to be used in various harsh environments under the protection of the outer sheath.

Optionally, the conductor is a Cat.6A ultra-soft copper conductor; Y

an outer surface of each conductor wire is tin-plated.

Optionally, the wrap tape material of the semiconductive wrap tape is a non-woven fabric having a semiconductive property.

Optionally, the semiconductive wrap tape forms a monitoring layer on the outer wall of the insulation layer, where the monitoring layer has a surface resistivity of less than 1500 ohms.

Optionally, the monitoring layer has a wrap coverage rate of 1/4 Optionally, the metal braid layer comprises hybrid braided high performance fiber and copper wires.

The present description provides a method of manufacturing a cable, which is not part of the invention, comprising the steps of:

providing an insulating layer on an outer wall of a conductor;

wrapping an outer wall of the insulation layer with a semiconductive wrapping tape; Y

providing a braided layer of metal on an outer wall of the semiconducting wrap tape.

In the solution described above, the present description provides a method by which a cable can be manufactured that allows the detection of electrical leakage, where at least the following technical effects can be achieved: an insulating layer is provided on the outer wall of the conductor For insulation and insulation, the semiconductive wrapping tape wraps the outer wall of the insulation layer to form a monitoring layer, since the monitoring layer is connected by wrapping, the monitoring layer can completely cover the outer wall surface of the insulating layer. The metal braid layer is provided on the outer wall of the semiconductive wrapping tape, on the one hand, the anti-twist and anti-pull performances of the cable are improved by using the metal braid layer, and on the other hand, leak detection can be realized through the metal braid layer, where when the insulating layer is damaged, electrical leakage will occur in the conductor, the semiconducting wrap tape will conduct current to the conductive metal wires in the metal braid layer, and by connecting the conductive metal wires in the metal braided layer with leakage protection device, the conductive metal wires in the metal braided layer can transmit a leakage signal to the leakage protection device to realize alarm or de-energizing operation, thus ensuring the safety and reliability of the cable.

Optionally, the step of providing an insulating layer on an outer wall of a conductor, further comprising:

extruding, using a plastic extruder, an insulating material to wrap around the conductor to form an insulating layer.

In the above described solution, the technical effects include at least the following: the insulating material can be heated, plasticized and evenly extruded into the conductor by the plastic extrusion machine, so as to ensure that the outer wall of the conductor can fully cover the insulating layer .

Optionally, the step of extruding, by means of a plastic extrusion machine, an insulating material to wrap the conductor further comprises:

heating and plasticizing the insulating material, and then evenly extruding the insulating material to wrap the conductor, using the plastic extrusion machine. Optionally, the step of heating and plasticizing the insulating material further comprises: the plastic extruder that uses a semi-tube extrusion die, where the temperature range of each section of the extruder is from 170 °C to 200 °C, and the temperature range of a die head is 210°C to 230°C.

Optionally, the step of wrapping an outer wall of the insulating layer with a semiconductive wrapping tape further comprises:

bonding a wrap joint of the semi-conductive wrap tape by means of a semi-conductive adhesive tape.

In the above described solution, the technical effects include at least the following: the semiconductive wrapping tape is fixed on the insulating layer by semiconductive adhesive tape, which can guarantee the integrity of the semiconductive wrapping tape and the insulating layer, and also guarantees the conductive property of the monitoring layer formed by the semiconductive wrapping tape on the entire cable.

Optionally, the step of providing a metal braid layer on an outer wall of the semiconducting wrap tape further comprises:

braid, using a braiding machine, copper wires and high-performance fibers to form the metal braid layer.

Optionally, the manufacturing process further comprises:

extruding, using the plastic extruder machine, a thermoplastic polyurethane elastomer to cover the braided layer of metal to form an outer shell.

In the above described solution, the technical effects include at least the following: By providing the outer sheath on the outer wall of the metal braid layer, the cable can be used in various harsh environments under the protection of the outer sheath, where the Outer cover is formed by extruding thermoplastic polyurethane elastomer to wrap the metal braided layer with the plastic extrusion machine, since the outer cover is extrusion formed by the plastic extrusion machine, the outer cover can cover evenly and by complete the outer wall of the braided layer of metal; In addition, since the raw material of the outer cover is thermoplastic polyurethane elastomer, the outer cover is highly wear-resistant, scratch-resistant, and high in strength, and has excellent performances of low-temperature resistance, flame retardancy, flame, grease resistance and chemical resistance of acids and bases, and therefore the cable can be used in various harsh environments under the protection of the outer sheath.

Brief description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present description, a brief description of the drawings necessary in the embodiments is made below. It should be understood that the following drawings illustrate only some of the embodiments of the present description and should not be construed as limiting the scope, and other related drawings can be obtained from these drawings by one skilled in the art without inventive efforts.

Fig. 1 shows a specific structure of a cable according to an embodiment of the present description;

Fig. 2 shows a specific structure of another cable according to an embodiment of the present description;

Reference signs: 10-wire low-voltage anti-twist which has high reliability and flexibility; 11-driver; 12-insulating layer; 13-semiconductive wrapping tape; 14-ply braided metal; 15-outer cover.

Detailed description of achievements

In order to make the objects, technical solutions and advantages of the embodiments of the present description more clear, the technical solutions of the embodiments of the present description will be described more clearly and completely below with reference to the drawings of the embodiments of the present description. present description. Apparently, the described embodiments are some of the embodiments of the present description, and not all of the embodiments. The components of the embodiments of the present disclosure described and illustrated in the drawings herein may be generally arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure as claimed, but rather to be merely representative of selected embodiments of the present disclosure. All other embodiments obtained by a person skilled in the art without inventive effort on the basis of the embodiments of the present description will be included in the scope of protection of the present description.

It should be noted that similar reference signs and letters indicate similar elements in the following drawings, and therefore, once a certain element is defined in one figure, it need not be further defined or explained in the following figures. In describing the embodiments of the present description, it should be understood that the orientation or positional relationship indicated by the terms such as "center", "top", "bottom", "left", "right", "vertical", "horizontal","interior","exterior" is based on the orientation or positional relationship indicated in the figures, or refers to the orientation or position where the product of this description is generally placed when in use, or refers to the orientation or positional relationship that is commonly understood by a person skilled in the art, which only serves to facilitate the description of the present description and simplify the description and not to indicate or suggest that the mentioned device or element must have a particular orientation, and be construed and operated in a particular orientation, and therefore cannot be construed as limiting the present disclosure.

In describing the embodiments of the present description, it should further be noted that, unless otherwise specifically specified and defined, the terms "arrange", "install", "join" and "connect" are to be understood in a broad sense, which, for example, can refer to a fixed connection, removable connection or integral connection; it can refer to a direct connection or an indirect connection through an intermediate means; and can refer to an internal communication between two elements. A person skilled in the art could understand the specific meaning of the terms in the present description according to the specific circumstances.

It should be noted that, in the absence of conflict, the embodiments of the present disclosure and the features of the embodiments may be combined with one another.

In the following, the technical solutions of the present description will be described with reference to the accompanying drawings.

The present embodiment provides a cable that enables detection of electrical leakage with high efficiency.

Referring to Fig. 1, Fig. 1 shows the specific structure of a low-voltage anti-twist cable having high reliability and flexibility 10 provided by the present embodiment.

The low-voltage anti-twist cable having high reliability and flexibility 10 comprises a conductor 11, an insulating layer 12, a semiconducting wrap tape 13, and a metal braid layer 14. The insulating layer 12 is provided on an outer wall of the conductor. 11. The semiconductive wrapping tape 13 wraps an outer wall of the insulating layer 12. The metal braid layer 14 is provided on an outer wall of the semiconductive wrapping tape 13.

The low-voltage anti-twist cable having high reliability and flexibility 10 provided above provides the technical effects of providing reliability and enabling detection of electrical leakage. Here, the conductor 11 is protected by the insulating layer 12, the semiconductive wrapping tape 13 wraps the outer wall of the insulating layer 12 to form a monitoring layer, since the monitoring layer is connected by wrapping, the monitoring layer can completely cover the outer wall surface of the insulating layer 12. The metal braid layer 14 is provided on the outer wall of the semiconductive wrapping tape 13, on the one hand, the use of the metal braid layer improves the anti-twist and anti-pull performances of the cable, and on the other hand , electrical leakage detection can be realized by the metal braided layer, where when the insulating layer 12 is damaged, electrical leakage will occur in the conductor 11, the semiconductive wrapping tape 13 will conduct the current to the conductive metal wires in the metal braid layer 14, and by connecting the conductive metal wires in the metal braid layer 14 with a leakage protection device, the conductive metal wires in the metal braid layer 14 can transmit a leakage signal to the leakage protection device. leakage protection to realize alarm or de-energize operation, thus ensuring the safety and reliability of the low voltage anti-twist cable which has high to reliability and flexibility 10.

In the above, it should be noted that in this embodiment the conductor 11 is an ultra-soft copper conductor Cat.6A 11, the wires in the conductor are tinned in this embodiment, the diameter of each wire of the conductor is 0 0.08mm, and the pitch diameter ratio after twisting of the outer layer is 8, which ensures the ultra-flexibility of the low-voltage anti-twist cable having high reliability and flexibility 10. In other embodiments, the strands of the conductor of Cat.6A 11 ultra-soft copper may be untinned, the diameter of each wire may be from 0.05mm to 0.5mm, and the pitch diameter ratio after the outermost layer twist shall not exceed to 12 times. It should be noted that, in other embodiments, conductors 11 of other standards can also be used, for example, a Cat.5, Cat.5E or Cat 611 conductor or the like.

Furthermore, it should be noted that the semiconductive wrapping tape 13 in this embodiment constitutes a monitoring layer on the outer wall of the insulating layer 12, and the wrapping tape material of the semiconductive wrapping tape 13 is a non-woven fabric. with a semiconductive property in this embodiment; and in other embodiments, the wrap tape material of the semiconductive wrap tape 13 may also be a nylon wrap tape or cable paper or the like with a semiconductive property. It should be noted that the monitoring layer has a resistivity of surface of less than 1500 ohms, and has an envelope coverage rate of 1/4 to 1/2, for example, 1/3, etc.

Furthermore, it should be noted that the material of the insulating layer 12 in this embodiment is an ultra-soft thermoplastic elastomer (TPE) having high strength and high elastic resistance. In other embodiments, the insulating layer 12 may also be composed of other insulating materials, such as a material selected from the group consisting of polyethylene, cross-linked polyethylene, polyvinyl chloride, polypropylene, polyolefin, fluoroplastics, nylon, ethylene propylene rubbers, and the like. . Here, it should be noted that the Shore A hardness of the insulation layer 12 in the present embodiment is 72 ± 3.

Furthermore, it should be noted that the metal braid layer 14 in this embodiment is formed by hybrid braiding of copper wires and high-performance fibers, and in this embodiment, the leak signal is transmitted through the copper wires. , and high-performance fibers improve the cable's anti-twist and anti-pull performances. Furthermore, in other embodiments, the metal braid layer can also be formed by hybrid braiding of other signal-transmitting metal wires and fibers, for example, by hybrid braiding of silver wires and fibers, etc.

By using the conductor 11, the insulation layer 12, the monitoring layer (semiconductive wrapping tape 13), and the metal braid layer 14 provided above, the low-voltage anti-twist cable having high reliability and flexibility 10 hereby provided embodiment, it has the characteristics of high flexibility, high tensile strength, high reliability, and enables electrical leakage detection, and can meet the industrial requirements of cables.

Optionally, a wrap seal of the semiconductive wrap tape 13 is fixed by a semiconductive adhesive tape.

In the above, due to the fixing using the semiconductive adhesive tape, the semiconductive wrapping tape 13 can be fixed on the insulating layer 12, which can ensure the integrity of the semiconductive wrapping tape 13 and the insulating layer 12, and also guarantees the conductive property of the monitoring layer formed by the semiconductive wrapping tape 13 in the entire cable.

It should be noted that, in other embodiments, the wrap joint of the semiconductive wrap tape 13 may also be glued with a glue having a semiconductive property, for example, by a semiconductive epoxy glue, etc. Optionally, the semiconductive wrap tape 13 can be glued using a hot melt adhesive, where the hot melt adhesive is a binder having plasticity, within a certain temperature range, the physical state of the hot melt adhesive changes with temperature, while the chemical properties of it remain the same, the hot melt adhesive is non-toxic and odorless, and is an environmentally friendly chemical; and by sticking and fixing with the hot melt adhesive, the gaps of the semiconductive wrapping tape 13 can be filled with the hot melt adhesive, so that the overall structure of the cable is more compact.

Optionally, the surface of each conductive metal wire in the metal braid layer 14 is tin-plated. By plating the surface of each conductive metal wire with tin, the corrosion resistance of the conductive metal wires is improved, and the solderability thereof is also improved. Furthermore, it should be noted that, in other embodiments, the surface of each metallic wire (which is a copper wire in the present embodiment, and may be other metallic wires that allow signal transmission in other embodiments) in the layer metal braid 14 may also be untinned.

Optionally, the low voltage anti-twist cable having high reliability and flexibility 10 further comprises an outer sheath 15, referring to Figure 2, Figure 2 shows the specific structure of another low voltage anti-twist cable having high reliability and flexibility. flexibility 10, in this embodiment.

The outer jacket 15 is provided on the outer wall of the braided metal layer 14. In the foregoing, by providing the outer jacket 15 on the outer wall of the braided metal layer 14, the outer jacket 15 can serve as a protective layer. that protects the exterior of the cable, so that the cable can be used in various harsh environments.

It should be noted that the material of the outer cover 15 in this embodiment is thermoplastic polyurethane (TPU). Thermoplastic polyurethanes (or thermoplastic polyurethane elastomers) have the characteristics of outstanding wear resistance, scratch resistance, high strength, low temperature resistance, flame retardancy, grease resistance, and resistance to acid and basic chemicals, and They can ensure that the cable can be used in various harsh environments. Furthermore, it should be noted that in other embodiments, the outer cover 15 may also be made of other materials, eg, polyvinyl chloride, polyethylene, chloroprene rubber, or the like.

As shown in Fig. 1 and Fig. 2, in the low-voltage anti-twist cable having high reliability and flexibility provided by the present embodiment, the conductor in the cable has a strand diameter (single wire) and a ratio of pitch diameter after twist capable of ensuring the flexibility of the cable; the monitoring layer is formed by wrapping with a semiconductive wrapping tape, which realizes complete coverage of the monitoring layer; the braided layer of metal is formed by hybrid braiding of copper wires and high-performance fibers, on the one hand, the copper wires carry out the transmission of a leak signal, once the insulation breaks, with the cooperation of a leakage protection device, the safety and reliability of the equipment and the surrounding environment can be ensured, and on the other hand, the high-performance fibers in the cable can improve the anti-twist and anti-pull performances of the cable; The material use of thermoplastic polyurethanes which are highly wear-resistant, scratch-resistant, and high-strength, and simultaneously, have excellent performances of low-temperature resistance, flame retardancy, grease resistance, and acid chemical resistance. and basic allows the cable to be used in a variety of harsh environments.

The above descriptions are only preferred embodiments of the present description, which are not used to limit the present description. For a person skilled in the art, the present description may have various changes and variations. Any modification, equivalent substitution, improvements etc. within the spirit and principle of this description will be included in the scope of protection of this description.

industrial application

Embodiments of the present disclosure provide a low-voltage anti-twist cable having high reliability and flexibility, in which the anti-twist and anti-pull performances of the cable can be enhanced by a semiconductive wrapping tape and a metal braid layer, and can be realized efficient electrical leakage detection.

Claims (10)

1. Low voltage anti-twist cable having high reliability and flexibility, characterized by comprising: a driver; an insulating layer, provided on an outer wall of the conductor; a semiconductive wrapping tape around an outer wall of the insulating layer; Y a braided layer of metal, provided on an outer wall of the semiconductive wrapper tape. 2. The low voltage anti-torsion cable having high reliability and flexibility according to claim 1, characterized in that A wrap joint of the semi-conductive wrap tape is fixed by a semi-conductive adhesive tape. 3. The low voltage anti-torsion cable having high reliability and flexibility according to claim 1, characterized in that A wrap joint of the semi-conductive wrap tape is glued and fixed by a semi-conductive glue. 4. The low voltage anti-torsion cable having high reliability and flexibility according to any of claims 1 to 3, characterized in that One surface of each conductive metal wire in the metal braid layer is tin-plated. 5. The low voltage anti-torsion cable having high reliability and flexibility according to any of claims 1 to 4, characterized in that the low voltage anti-twist cable having high reliability and flexibility further comprises an outer sheath provided on an outer wall of the metal braid layer. 6. The low voltage anti-twist cable having high reliability and flexibility according to any of claims 1 to 5, characterized in that the conductor is an ultra-soft copper conductor Cat.6A; Y an outer surface of each conductor wire is tin-plated. The low-voltage anti-twist cable having high reliability and flexibility according to any one of claims 1 to 6, characterized in that a wrapping tape material of the semiconductive wrapping tape is a non-woven fabric having a semiconductive property. 8. The low-voltage anti-twist cable having high reliability and flexibility according to any one of claims 1 to 7, characterized in that the semiconducting wrap tape forms a monitoring layer on the outer wall of the insulating layer, wherein the monitoring layer has a surface resistivity of less than 1500 ohms. The low voltage anti-twist cable having high reliability and flexibility according to claim 8, characterized in that the monitoring layer has a sheath coverage rate of 1/4 to 1/2. 10. The low-voltage anti-twist cable having high reliability and flexibility according to any one of claims 1 to 9, characterized in that the metal braid layer comprises copper wires and high-performance fibers that are hybrid-braided.