Multi-shielding drag chain cable

Abstract

The utility model discloses a multi-shielding drag chain cable, which comprises a cable core, the cable core comprises insulating core wire pairs, a central filling piece and filling strips, the insulating core wire pairs are uniformly arranged around the circumferential direction of the central filling piece, the filling strips are arranged in the gaps of the adjacent insulating core wire pairs, the cable is formed in a back-twist twisting mode, and the filling strips are arranged in the gaps of the adjacent insulating core wire pairs. The cabling stranding pitch is 8-10 times of the stranding outer diameter; multiple shielding layers and a protection layer are sequentially arranged outside the cable core, the multiple shielding layers sequentially comprise a semiconductor tape wrapping layer, an inner protection layer and a woven shielding layer from inside to outside, and the protection layer comprises a non-woven fabric wrapping layer and a sheath. The cable has the advantages of excellent transmission performance, electromagnetic resistance, twisting resistance, bending resistance and long service life, and can reduce the occurrence of equipment abnormity in the moving process of equipment, reduce the frequency of cable replacement, prolong the service life of the equipment and reduce the total cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables and relates to a cable, in particular to a multi-shielded drag chain cable. Background Art

[0002] At present, the degree of industrialization is getting higher and higher, and the requirements for the electromagnetic resistance, mechanical properties and service life of wires have been improved. The cables on the market currently have problems with poor material performance and unreasonable design, and such products need to be replaced frequently during use. The transmission performance and electromagnetic resistance of the cable do not meet the use requirements, so some functions of the machine cannot be fully realized, such as the display screen flashing on the equipment, signal distortion, sudden jamming of the equipment, etc. Since many uses are carried out in mobile occasions, the cable is required to be resistant to movement, twisting and bending. There are not many wires on the market that meet the requirements of comprehensive transmission, internal and external electromagnetic resistance, mobility and high life, and it is not easy to choose cables that meet the requirements. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to solve the above-mentioned problems and provide a multi-shielded drag chain cable.

[0004] Technical solution: The utility model relates to a multi-shielded drag chain cable, comprising a cable core, wherein the cable core comprises an insulating core wire pair, a central filling piece and a filling strip, wherein the insulating core wire pair is uniformly arranged around the circumference of the central filling piece, and the filling strip is arranged in the gap between adjacent insulating core wire pairs, and the cable is formed by back-twisting and twisting, and the cable lay length is 8 to 10 times the twisted outer diameter; multiple shielding layers and protective layers are sequentially arranged outside the cable core, and the multiple shielding layers sequentially comprise a semiconductor tape wrapping layer, an inner protective layer and a braided shielding layer from the inside to the outside, and the protective layer comprises a non-woven fabric wrapping layer and a sheath.

[0005] Furthermore, the insulating core wire pair is formed by twisting two core wires provided with an insulating layer in a back-twisted twisting manner, and the twist pitch does not exceed 16 times the twisted outer diameter.

[0006] Furthermore, the core wire is formed by twisting Category 6A copper conductors with a single wire diameter of 0.08±0.02 mm.

[0007] Furthermore, the insulating layer is formed by sleeve extrusion of ETFE material.

[0008] Furthermore, the central filling piece is formed by twisting a plurality of terylene yarns and then wrapping them with non-woven fabric, and the filling strips are formed by loose terylene yarns.

[0009] Furthermore, the braided shielding layer uses a nano conductor.

[0010] Furthermore, the sheath is made of TPU material.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: the multi-shielded drag chain cable of the utility model has excellent transmission performance, is anti-electromagnetic, resistant to twisting, resistant to bending, and has a long lifespan. It can reduce equipment abnormalities during equipment movement, reduce the number of cable replacements, increase the service life of the equipment, and reduce the overall cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0014] like Figure 1 As shown, the multi-shielded drag chain cable involved in this embodiment includes a cable core, which is composed of 6 groups of insulating core wire pairs 9 uniformly arranged around the circumference of the central filling piece 5, and the gaps between adjacent insulating core wire pairs 9 are filled with filling strips 10, and the cable is formed by back-twisting and twisting, and the cable twisting distance is 8 to 10 times the twisted outer diameter. In a specific implementation, the central filling piece 5 is formed by twisting a number of terylene yarns and then wrapping them with non-woven fabrics, and the filling strips 10 are made of terylene yarn loose wires. When used, the effective area is calculated to match a reasonable filling quantity, so that the core wires are firm, the internal friction between the core wires is reduced to, and the core wires are guaranteed not to twist.

[0015] In a specific embodiment, the core wire 6 is formed by twisting a Category 6 copper conductor with a single wire diameter of 0.08mm, and an ETFE material sleeve extrusion molding insulation layer 4 is used on the outside. To improve the mobile life, the copper content is above 99.95%, so that the toughness, twisting and bending of the conductor meet very high requirements. For example, a 0.5 square conductor is 105 / 0.08mm (7 / 15 / 0.08). The composite twisting method is used: the sub-twist is about 20 times the outer diameter of the twisted wire, and the compound twist is about 12 times the outer diameter of the compound twist. The sub-twist is twisted in the S direction and the compound twist is twisted in the S direction, which improves the flexibility of the conductor and reduces the bending radius of the cable. The two core wires 6 are twisted on the detwisting machine to form an insulated core wire pair 9. Each pair of core wires 6 is twisted, and the twist pitch adopts a small twist section with unequal twist pitch, and the maximum does not exceed 16 times the outer diameter of the twisted wire. It can well shield the mutual interference of each pair of core wires and take into account the mobile life of the wire.

[0016] Multiple shielding layers and protective layers are sequentially arranged outside the cable core, and the multiple shielding layers include a semiconductor tape wrapping layer 7, an inner protective layer 3 and a braided shielding layer 2 from the inside to the outside. In a specific embodiment, the semiconductor tape wrapping layer 7 is the first layer of shielding, which is formed by wrapping with a semiconductor tape, wherein the semiconductor tape is selected from the product of Jiaxing Jiuhe New Materials Technology Co., Ltd.: C shield, which is a composite of an aluminum foil layer and a wave-transmitting and wave-absorbing material, a carbon nanomaterial wave-absorbing and reflecting wave-transmitting material. The semiconductor tape has the characteristics of softness and good conductor performance, and can absorb electromagnetic waves generated between the core wires. The inner protective layer 3 is the second layer of shielding, which is made of conductive PVC material. The conductive PVC has anti-electromagnetic properties, greatly improves the shielding effect, and provides two layers of protection for electromagnetic interference of the inner and outer layers. In addition, the conductive PVC has a Shore hardness of 75A, maintains the same hardness as the outer sheath 1 and has high fatigue resistance. During the movement, the inner and outer layers are subjected to even force, reducing the force on the core wire. The braided shielding layer 2 outside the inner sheath 3 is the third shielding layer, which uses a natural conductor, that is, a flattened alloy copper wire wrapped around a nylon wire, to extend its service life and improve its anti-electromagnetic ability. If a ground wire is needed, the same material as the conductor of the core wire 6 is used to wrap it around the inner sheath 3, and the wrapping pitch is 30 times the outer diameter of the inner sheath 3, so that the ground wire is not easy to break.

[0017] The protective layer includes a non-woven fabric wrapping layer 8 and a sheath 1. In a specific embodiment, the non-woven fabric wrapping layer 8 is formed by wrapping non-woven fabric. Since the sheath 1 material has high viscosity, it is used for isolation weaving and is easy to peel off the sheath 1. The sheath 1 is made of a slippery TPU material, which has the characteristics of softness, wear resistance, and oil resistance, and increases the bending radius of the wire and reduces the stress on the internal core wire.

Claims

1. A multi-shielded drag chain cable, characterized in that: The invention comprises a cable core, wherein the cable core comprises an insulating core wire pair, a central filling piece and a filling strip, wherein the insulating core wire pair is uniformly arranged around the circumference of the central filling piece, and the filling strip is arranged in the gap between adjacent insulating core wire pairs, and the cable is formed by back-twisting and twisting, and the cable lay length is 8 to 10 times the twisted outer diameter; multiple shielding layers and protective layers are sequentially arranged outside the cable core, and the multiple shielding layers sequentially comprise a semiconductor tape wrapping layer, an inner protective layer and a braided shielding layer from the inside to the outside, and the protective layer comprises a non-woven fabric wrapping layer and a sheath.

2. The multi-shielded drag chain cable according to claim 1, characterized in that: The insulated core wire pair is formed by twisting two core wires provided with an insulating layer in a back-twisted twisting manner, and the twist pitch does not exceed 16 times the twisted outer diameter.

3. The multi-shielded drag chain cable according to claim 2, characterized in that: The core wire is formed by twisting Category 6A copper conductors with a single wire diameter of 0.08±0.02mm.

4. The multi-shielded drag chain cable according to claim 2, characterized in that: The insulating layer is formed by sleeve extrusion of ETFE material.

5. The multi-shielded drag chain cable according to claim 1, characterized in that: The central filling piece is formed by twisting a plurality of terylene yarns and then wrapping them with non-woven fabric, and the filling strips are formed by loose terylene yarns.

6. The multi-shielded drag chain cable according to claim 1, characterized in that: The braided shield layer uses a natural conductor.

7. The multi-shielded drag chain cable according to claim 1, characterized in that: The sheath is made of TPU material.

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