Copper alloy stranded wire and cable

Abstract

The invention discloses a copper alloy stranded wire and a cable. The copper alloy stranded wire comprises a first fiber wire and a copper alloy strand wire which wraps the periphery of the first fiber wire in the same direction. The copper alloy strand wire comprises a second fiber wire located in the center and a plurality of copper alloy wires which are concentrically twisted and wound on the periphery of the second fiber wire. According to the design, the conductor in the cable adopts the copper alloy wires, the plurality of copper alloy wires and the second fiber wires are stranded to form the copper alloy plied wire, and then the copper alloy plied wire is wound on the periphery of the first fiber wire to form the copper alloy stranded wire by adopting a wrapping process, so that the copper alloy stranded wire serving as the conductor in the cable has higher bending resistance; the system is more suitable for a high-frequency use environment, and the signal quality and the monitoring accuracy in the electrocardiosignal transmission process are ensured; moreover, the high-strength fiber wire wrapping solves the problem that the copper alloy wire is easy to break due to too small diameter, improves the overall tensile strength of the copper alloy stranded wire, and can give play to all performances of the copper alloy material.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a copper alloy twisted wire and a cable. Background Art

[0002] The wires inside existing cables are made of bare copper, tinned copper, or copper alloy. Wires made of bare copper or tinned copper are prone to wire breakage in high-frequency usage environments, affecting the quality of ECG signals and the accuracy of monitoring. Wires made of copper alloy wires are prone to breakage due to the small diameter and low strength of individual copper alloy wires. Wires made of simply gluing together multiple copper alloy wires have poor bending resistance and low tensile strength, and cannot fully utilize the performance of the copper alloy material. Therefore, it is necessary to design a copper alloy wire and cable with internal wires that are not prone to breakage and have good tensile strength. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor bending resistance and low tensile strength of copper alloy wires inside cables in the prior art, thereby providing a copper alloy twisted wire and cable.

[0004] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0005] A copper alloy twisted wire comprises a first fiber wire and a copper alloy strand wound around the first fiber wire; the copper alloy strand comprises a second fiber wire located in the center and a plurality of copper alloy wires concentrically twisted and wound around the second fiber wire.

[0006] Furthermore, there are a plurality of copper alloy strands wrapped around the outer circumference of the first fiber line, and the plurality of copper alloy strands are wrapped side by side along the same direction around the outer circumference of the first fiber line.

[0007] Furthermore, in the axial direction of the first fiber line, the lay length between two adjacent sections of the plurality of copper alloy strands arranged side by side is 1.5-2.0 times the width of the plurality of copper alloy strands arranged side by side.

[0008] Furthermore, the copper alloy wires are twisted and wound in multiple layers around the outer periphery of the second fiber wire, and the number of the copper alloy wires in each layer increases from the inside out.

[0009] Furthermore, in the two adjacent layers of copper alloy wires, the number of the copper alloy wires located in the outer layer is six more than the number of the copper alloy wires located in the inner layer.

[0010] Furthermore, the number of the copper alloy wires located in the innermost layer is six; wherein the copper alloy wires in the innermost layer are the first layer of copper alloy wires directly wound around the outer circumference of the second fiber wires.

[0011] Furthermore, the copper alloy wire includes a copper alloy wire core and a tin-plated layer provided on the surface of the copper alloy wire core.

[0012] Furthermore, the first fiber line and the second fiber line are any one of aramid fiber line, polyethylene fiber line, carbon fiber line, polyimide fiber line, and poly(p-phenylene benzobisazole) (PBO) fiber line.

[0013] A cable comprises an outer sheath and the copper alloy twisted wires described above arranged in the outer sheath.

[0014] Furthermore, the outer sheath includes an outer layer, a shielding layer, a conductive layer and an insulating layer which are sequentially arranged from the outside to the inside, and the insulating layer is located on the outer periphery of the copper alloy twisted wire.

[0015] Furthermore, the cable is a fetal monitoring probe cable, and the copper alloy twisted wire is used to transmit fetal monitoring electrocardiogram signals; or the cable is an electrocardiogram cable for an electrocardiograph, and the copper alloy twisted wire is used to transmit electrocardiogram signals of the electrocardiograph.

[0016] The technical solution of the present invention has the following advantages:

[0017] 1. The copper alloy twisted wire provided by the present invention comprises a plurality of copper alloy wires concentrically twisted and wound around the periphery of a second fiber wire to form a copper alloy strand. While maintaining the strength of the copper alloy wire, the toughness is enhanced, thereby enhancing the bending resistance of the copper alloy strand. The plurality of copper alloy strands are wrapped around the periphery of the first fiber wire, so that the first fiber wire serves as the main force-bearing structure of the copper alloy twisted wire, which can effectively enhance the bending resistance and tensile strength of the copper alloy twisted wire. The invention is more suitable for high-frequency use environments and is conducive to ensuring the transmission quality of signals.

[0018] 2. In the copper alloy twisted wire provided by the present invention, a plurality of copper alloy strands are wrapped side by side around the periphery of a first fiber wire, and the lay length between two adjacent sections of the plurality of copper alloy strands arranged side by side is 1.5-2.0 times the width of the plurality of copper alloy strands arranged side by side. With such an arrangement, areas without copper alloy strands wrapped around the periphery of the first fiber wire will continuously appear. While ensuring that the bending resistance and tensile strength of the copper alloy twisted wire meet the requirements, the amount of copper alloy wire used can be minimized, thereby reducing material costs.

[0019] 3. The copper alloy twisted wire provided by the present invention, in which multiple layers of copper alloy wires are twisted layer by layer and wrapped around the periphery of the second fiber wire, can ensure that the cross-section of the formed copper alloy strands remains as circular as possible, making it easier to subsequently wrap the copper alloy strands tightly around the periphery of the first fiber wire.

[0020] 4. The copper alloy twisted wire provided by the present invention has a tinned layer on the surface of the copper alloy wire, which can enhance the corrosion resistance and provide good welding performance; in addition, the copper alloy wire with a tinned layer on the surface is relatively soft and has good electrical conductivity, which can extend the service life of the weak current cable.

[0021] 5. The copper alloy twisted wire provided by the present invention can improve the overall tensile strength of the copper alloy twisted wire and bring into play the full performance of the copper alloy wire because the aramid fiber wire, polyethylene fiber wire, carbon fiber wire, polyimide fiber wire, and poly(p-phenylene benzobisazole) (PBO) fiber wire have high strength.

[0022] 6. The copper alloy twisted wire provided by the present invention adopts the above-mentioned copper alloy twisted wire, which has the advantages of good bending and tensile resistance, internal conductors are not prone to breakage, and high signal transmission quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 is a cross-sectional view of a cable in an embodiment of the present invention;

[0025] Figure 2 This is a schematic structural diagram of a plurality of copper alloy strands wrapped side by side around the periphery of a first fiber wire in an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the structure in which multiple copper alloy wires are twisted around the periphery of the second fiber wire in an embodiment of the present invention.

[0027] Explanation of reference numerals: 100, copper alloy twisted wire; 110, first fiber wire; 120, copper alloy strand; 121, second fiber wire; 122, copper alloy wire; 210, outer layer; 220, shielding layer; 230, conductive layer; 240, insulating layer. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] like Figure 1 The cable shown in Figure 3 includes a copper alloy stranded wire 100 and an outer sheath wrapped around the outer circumference of the copper alloy stranded wire 100. The outer sheath includes, arranged from the outside inward, an outer layer 210, a shielding layer 220, a conductive layer 230, and an insulating layer 240. The insulating layer 240 is located around the outer circumference of the copper alloy stranded wire 100. The copper alloy stranded wire 100 includes a first fiber wire 110 and multiple copper alloy strands 120 wrapped around the outer circumference of the first fiber wire 110. The copper alloy strands 120 include a second fiber wire 121 located at the center and multiple copper alloy wires 122 concentrically twisted and wrapped around the outer circumference of the second fiber wire 121. With reference to the cable, "from outside to inside" refers to the direction from the outside of the cable toward the center of the cable.

[0032] Since the strength of copper alloy materials is much higher than that of tinned copper and bare copper, copper alloy materials can be made into copper alloy wires 122 with extremely small diameters. However, a single copper alloy wire 122 is too thin and easily broken. In the present application, multiple extremely thin copper alloy wires 122 and a high-strength second fiber wire 121 are twisted together to form a copper alloy strand 120. While maintaining the strength of the copper alloy wire 122, the toughness is enhanced, thereby enhancing the bending resistance of the copper alloy strand 120. The twisted multiple copper alloy strands 120 are wrapped around the outer periphery of the high-strength first fiber wire 110 to form a copper alloy strand 100, so that the first fiber wire 110 serves as the main structure of the copper alloy strand 100 to bear the force, thereby obtaining a copper alloy strand 100 with higher bending resistance and tensile strength. This is more suitable for high-frequency use environments and is conducive to ensuring the transmission quality of signals within the cable.

[0033] Specifically, the first fiber wire 110 and the second fiber wire 121 are any one of aramid fiber wire, polyethylene fiber wire, carbon fiber wire, polyimide fiber wire, and polyparaphenylene benzobisazole (PBO) fiber wire. The fiber wires of these materials have high strength and good bending resistance. After being twisted with the copper alloy wire 122, a copper alloy twisted wire 100 with good bending resistance and high tensile strength can be obtained.

[0034] In some embodiments, four copper alloy strands 120 are wound around the periphery of the first fiber strand 110, with the four copper alloy strands 120 wrapped side by side in the same direction around the periphery of the first fiber strand 110. In the axial direction of the first fiber strand 110, the lay length between two adjacent sections of the plurality of copper alloy strands 120 arranged side by side can be any value; preferably, the lay length between two adjacent sections of the plurality of copper alloy strands 120 arranged side by side is 1.5-2.0 times the width of the plurality of copper alloy strands 120 arranged side by side. This arrangement ensures that there are continuous areas around the periphery of the first fiber strand 110 without copper alloy strands 120 wound around them. While ensuring that the bending resistance and tensile strength of the copper alloy stranded wire 100 meet the requirements, the amount of copper alloy strands 122 used can be minimized, thereby reducing material costs. It should be understood that the number of copper alloy strands 120 wrapped side by side can be adjusted according to the required strength, and the number of copper alloy strands 120 wrapped side by side can also be two, three, or five or more. The wrapping angle of the copper alloy strand 120 can be controlled at 30° to 40°, and the coverage rate of the outer periphery of the first fiber wire 110 by the copper alloy strand 120 is about 30%. This ensures that the covering force of the copper alloy strand 120 on the first fiber wire 110 is not too small, and the wrapping production rate of the copper alloy strand 120 is not too low.

[0035] In some embodiments, the copper alloy wires 122 are twisted and wrapped around the outer periphery of the second fiber wire 121 in multiple layers, with the number of copper alloy wires 122 in each layer increasing from the inside out. With the second fiber wire 121 as a reference, "from the inside out" refers to a direction from the layer of copper alloy wires 122 closest to the second fiber wire 121 to the layer of copper alloy wires 122 farthest from the second fiber wire 121. The innermost layer of copper alloy wires 122 refers to the first layer of copper alloy wires 122 wrapped around the outer periphery of the second fiber wire 121. There are multiple copper alloy wires 122 in the innermost layer. Of two adjacent layers of copper alloy wires 122, the outer layer has six more copper alloy wires 122 than the inner layer. Preferably, the innermost layer contains six copper alloy wires 122. The second layer contains six more copper alloy wires 122 than the innermost layer, i.e., twelve copper alloy wires 122 are wound around the innermost layer, and so on. This ensures the roundness of the copper alloy strands 120 and facilitates subsequent tight wrapping of the copper alloy strands 120 around the outer circumference of the first fiber strand 110. In an alternative embodiment, the innermost layer contains twelve copper alloy wires 122, in which case the second layer contains eighteen copper alloy wires 122.

[0036] In some embodiments, the copper alloy wire 122 includes a copper alloy core and a tinned layer disposed on the surface of the copper alloy core. The tinned layer enhances corrosion resistance and provides good welding performance. Furthermore, the copper alloy wire 122 with the tinned layer is relatively soft and has good electrical conductivity, extending the service life of the low-voltage cable.

[0037] The cable provided in the embodiment of the present invention can be used in medical fetal monitoring equipment or electrocardiographs as a probe cable connecting an electrocardiograph probe and a medical monitor or electrocardiograph. Since the copper alloy twisted wire 100 serving as a conductor inside the cable has the advantages of good bending and tensile resistance and not prone to breakage, when used in a probe cable, it can ensure that the electrocardiograph signals collected by the probe are transmitted to the medical monitor through the cable with high quality, thereby ensuring the accuracy of the electrocardiograph signal monitoring results.

[0038] In summary, the copper alloy twisted wire and cable provided by the embodiments of the present invention, the conductor in the cable is made of copper alloy wire 122, and the copper alloy wire 122 and the high-strength fiber wire are subjected to a re-twisting and wrapping process, so that the copper alloy twisted wire 100 serving as the conductor in the cable has higher bending resistance, is more suitable for high-frequency usage environments, and ensures the signal quality and monitoring accuracy during ECG signal transmission; moreover, the high-strength fiber wire wrapping solves the problem that the copper alloy wire 122 is too small in diameter and easily broken, thereby improving the overall tensile strength of the copper alloy twisted wire 100 and being able to bring into play the full performance of the copper alloy material.

[0039] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A copper alloy stranded wire, characterized in that: The invention comprises a first fiber line (110) and a copper alloy strand (120) wound around the periphery of the first fiber line (110); the copper alloy strand (120) comprises a second fiber line (121) located in the center and a plurality of copper alloy wires (122) coaxially twisted and wound around the periphery of the second fiber line (121).

2. The copper alloy stranded wire according to claim 1, characterized in that There are multiple copper alloy strands (120) wrapped around the outer periphery of the first fiber line (110), and the multiple copper alloy strands (120) are wrapped side by side around the outer periphery of the first fiber line (110).

3. The copper alloy stranded wire according to claim 2, characterized in that In the axial direction of the first fiber line (110), the lay length between two adjacent sections of the plurality of copper alloy strands (120) arranged side by side is 1.5-2.0 times the width of the plurality of copper alloy strands (120) arranged side by side.

4. The copper alloy stranded wire according to any one of claims 1 to 3, characterized in that: The copper alloy wires (122) are twisted and wound in multiple layers around the outer periphery of the second fiber wire (121), and the number of the copper alloy wires (122) in each layer increases from the inside to the outside.

5. The copper alloy stranded wire according to claim 4, characterized in that In the two adjacent layers of copper alloy wires (122), the number of the copper alloy wires (122) located in the outer layer is six more than the number of the copper alloy wires (122) located in the inner layer.

6. The copper alloy stranded wire according to claim 5, characterized in that The number of the copper alloy wires (122) located in the innermost layer is six; wherein the copper alloy wires (122) in the innermost layer are the first layer of copper alloy wires (122) directly wound around the outer periphery of the second fiber wire (121).

7. The copper alloy stranded wire according to claim 1, characterized in that The copper alloy wire (122) comprises a copper alloy wire core and a tin-plated layer arranged on the surface of the copper alloy wire core.

8. The copper alloy stranded wire according to claim 1, wherein The first fiber line (110) and the second fiber line (121) are any one of aramid fiber lines, polyethylene fiber lines, carbon fiber lines, polyimide fiber lines, and poly(p-phenylene benzobisazole) (PBO) fiber lines.

9. A cable, characterized in that: The invention comprises an outer sheath and the copper alloy twisted wire according to any one of claims 1 to 8 arranged in the outer sheath.

10. The cable according to claim 9, characterized in that The outer sheath comprises an outer layer (210), a shielding layer (220), a conductive layer (230), and an insulating layer (240) which are sequentially arranged from the outside to the inside. The insulating layer (240) is located on the outer periphery of the copper alloy twisted wire (100).

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