Data transmission cable for physically-foamed insulation transponder

A data transmission cable, physical foaming technology, applied in the direction of insulated cables, insulated conductors, cables with twisted strands/quad strands, etc., can solve the problems of high cable manufacturing cost and increased tedious manufacturing process, etc. Achieve the effects of reducing the manufacturing process, reducing the relative dielectric constant, and reducing transmission attenuation

Inactive Publication Date: 2015-11-11
江苏通鼎光电科技有限公司
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AI-Extracted Technical Summary

Problems solved by technology

However, in the prior art, in order to improve the shielding performance of the cable for the aluminum sheath type railway transponder data transmission cable, two shielding sheath structures, the...
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Method used

It should be noted that, in actual production, it is also possible to take the cable core as the center, and four groups are evenly distributed, and each group of two discharge copper wires, such a structural design, not only helps the overall roundness of the cable , It also ensures high safety. Even if one side of the cable is impacted by foreign objects and the leakage copper wire on this side is damaged, the use of the cable will not be affected. The safety is high and the use effect is good.
The insulation of this cable has adopted " skin-bubble-skin " physical foamed polyolefin insulation, has good moisture-proof function and excellent insulation performance, and the relative dielectric constant of insulating medium is greatly reduced, has reduced the transmission of cable Attenuation can effectively improve the transmission performance of the cable.
Wherein, described copper conductor 2 and discharge copper wire 4 are TR type annealed copper wire, guarantee the softness of cable, be convenient to retractable, not easy to break.
[0027] Wherein, the discharge copper wire 4 is close to the basic ...
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Abstract

The invention provides a data transmission cable for a physically-foamed insulation transponder. The data transmission cable comprises a cable core, an insulating lining, a base sheath, an inner sheath, a double-steel belt armor layer and an outer sheath, wherein the cable core is stranded by two of four insulated single lines; the insulating lining, the base sheath, the inner sheath, the double-steel belt armor layer and the outer sheath are sequentially arranged outside the cable core from inside to outside; discharge copper leads are arranged between the insulating lining and the base sheath; and each insulated single line comprises a copper conductor and a skin-foam-skin physically-foamed insulation structure outside the copper conductor. The cable has the advantages of good moisture-proof function, excellent insulating property and small transmission attenuation. According to an aluminum sheath cable, a layer of inner sheath for longitudinally wrapping the outside of a corrugated single-side aluminum-plastic tape and a single-side aluminum-plastic tape is removed; by properly increasing the thickness of an aluminum layer of the aluminum sheath, the same shielding performance effect is reached; the manufacturing process is effectively reduced; the production efficiency is improved; and the manufacturing cost is reduced.

Application Domain

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  • Data transmission cable for physically-foamed insulation transponder

Examples

  • Experimental program(1)

Example Embodiment

[0022] It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.
[0023] Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.
[0024] A physical foam insulated transponder data transmission cable, such as figure 1 As shown, it includes a cable core formed by twisting two or four insulated single wires, as well as an insulating lining 3, a base sheath 5, an inner sheath 6, and a double steel tape armor that are sequentially arranged from the inside to the outside of the cable core Packing layer 7, outer sheath 8; a drain copper wire 4 is provided between the insulating liner 3 and the base sheath 5; the insulated single wire consists of the copper conductor 2 and the skin-foam-skin three outside the copper conductor 2 Layer co-extruded physical foamed polyolefin insulation structure 1.
[0025] It should be noted that the skin-foam-skin three-layer co-extruded physical foamed polyolefin insulation structure 1 reduces the relative dielectric constant of the insulation medium of the cable by about 40%, which can greatly improve the transmission performance of the cable. The insulation structure has excellent The moisture-proof function and insulation performance.
[0026] The basic sheath 5 may be an aluminum sheath, which is longitudinally wrapped and welded to the outside of the insulating lining 3 to form a fully sealed structure. As the aluminum sheath structure eliminates the need for longitudinally clad embossed single-sided aluminum-plastic tape and a layer of inner sheath outside the single-sided aluminum-plastic tape, the thickness of the aluminum layer can be appropriately increased on the basis of the original technology. This structure is more compact and saves space while ensuring shielding performance.
[0027] Wherein, the leakage copper wire 4 is in close contact with the basic sheath 5. The internal structure of the cable is compact, with good stability, and will not be easily twisted when retracting and unwinding.
[0028] The basic sheath 5 may also be a comprehensive sheath, which includes a longitudinally wrapped embossed single-sided aluminum-plastic tape layer. At this time, the drain copper wire is closely attached to the aluminum surface of the longitudinally clad embossed single-sided aluminum-plastic tape layer.
[0029] Wherein, the insulating lining layer 3 is a wrapped non-hygroscopic polyethylene sleeve or an extruded polyethylene sleeve.
[0030] According to requirements, the inner sheath 6 can be a polyethylene sheath or a halogen-free low-smoke flame-retardant sheath. The outer sheath 8 can be a polyethylene sheath or a halogen-free low-smoke flame-retardant sheath.
[0031] Wherein, the copper conductor 2 and the drain copper wire 4 are both TR-type soft copper wires, which ensure the flexibility of the cable, facilitate storage and release, and are not easy to break.
[0032] It should be noted that in actual production, four groups of two leakage copper wires in each group can be evenly distributed with the cable core as the center. Such a structural design is not only conducive to the overall roundness of the cable, but also ensures In order to improve the safety, even if one side of the cable is impacted by an external object, the leakage copper wire on this side is damaged, it will not affect the use of the cable, the safety is high, and the use effect is good.
[0033] In addition, a central strengthening member, such as cotton and hemp rope, can be arranged at the center of the cable core, which makes the cable structure stronger, more stable and durable without greatly increasing the weight of the cable.
[0034] The insulation of the cable adopts "skin-foam-skin" physical foamed polyolefin insulation, which has good moisture-proof function and excellent insulation performance, and the relative dielectric constant of the insulating medium is greatly reduced, which reduces the transmission attenuation of the cable. Effectively improve the transmission performance of the cable.
[0035] When the aluminum sheath is used for the basic sheath, compared with the aluminum sheathed cable in the prior art, the longitudinally wrapped single-sided aluminum-plastic tape and the single-sided aluminum-plastic tape are omitted, which can effectively reduce manufacturing The working procedure improves the production efficiency. At the same time, it can also greatly reduce the outer diameter of the finished cable.
[0036] Therefore, when an aluminum sheath is used for the basic sheath 5 to produce an aluminum sheathed cable, the shielding performance can be improved by appropriately increasing the thickness of the aluminum layer of the aluminum sheath as required to meet product requirements. Compared with the aluminum sheathed cable in the prior art, the longitudinally wrapped single-sided aluminum-plastic tape and a layer of inner sheath outside the single-sided aluminum-plastic tape are omitted. Therefore, the thickness of the aluminum layer of the aluminum sheath is increased appropriately. It will not increase the manufacturing cost, but will greatly reduce the manufacturing cost.
[0037] The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.
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Description & Claims & Application Information

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