Polytetrafluoroethylene pushing insulated cable

Abstract

The utility model provides a polytetrafluoroethylene pushing insulated cable. The polytetrafluoroethylene pushing insulated cable comprises a conductor inner layer, an insulating layer is arranged outside the conductor inner layer, a shielding layer is arranged outside the insulating layer, and a sheath layer is arranged outside the shielding layer. According to the utility model, the conductor inner layer is made of the silver-plated round copper wire and the nickel-plated round copper wire, so that the conductor inner layer has excellent electrical performance, the conductor is resistant to high temperature and has no breakdown phenomenon in a withstand voltage test, and the sheath layer is wrapped by multiple layers, so that the sheath layer has good strength and can provide good protection for the conductor inner layer; meanwhile, the sheath layer is of an easy-to-peel structure, so that peeling is facilitated, the shielding layer and the insulating layer are not damaged during peeling, and economic loss possibly existing in the using process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable technical field especially relates to a polytetrafluoroethylene push away insulated cable. BACKGROUND

[0002] Cable is a kind of electric energy or signal transmission device, cable is made of one or more mutually insulated conductors and outer insulating protective layer, for the wire that electric power or information is transmitted from one place to another, it is usually by several or several groups of wires (at least two in each group) stranded like rope cable, each group of wire is mutually insulated, and it is usually twisted around a center, the whole outside is covered with highly insulating cover layer, cable as the important device of electric energy or signal transmission, plays a vital role in modern society, understand the composition, type, characteristic and application of cable and selection and use method, it is of great significance to ensure the safe and stable operation of power system. SUMMARY

[0003] The technical content of the utility model provides a kind of polytetrafluoroethylene push away insulated cable.

[0004] To solve the above problems, the utility model provides a kind of polytetrafluoroethylene push away insulated cable, including conductor inner layer, the outside of the conductor inner layer is provided with insulating layer, the outside of the insulating layer is provided with shielding layer, the outside of the shielding layer is provided with sheath layer, the manufacturing material of the conductor inner layer is silver-plated round copper wire and nickel-plated round copper wire, conductor inner layer should be concentric when stranding, adjacent layer can be stranded in the same direction, outer layer must be left, but when re-stranding conductor inner layer, the stranding direction of outer layer can be right, the insulating layer should be around polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite film and polytetrafluoroethylene raw material belt combination insulation, insulating layer should adopt single layer or multilayer around, single layer around coverage should be no less than 67%, when multilayer around, around coverage rate should be no less than 50%, the around direction of adjacent layer should be opposite, after around, insulating layer should be sintered and sealed, the film belt of around insulation is allowed to be connected, the length of the connection place should be no more than 26mm, the insulation connection between different layers should not overlap, the outer diameter of the connection place exceeds the value of maximum outer diameter should be no more than 5 times the nominal thickness of film, single layer belt insulation is 7 times, the connection of the outermost insulating belt in 45m finished wire cannot exceed one place, the shielding layer adopts braided structure, the shielding layer is woven using the weaving mode of joint, this weaving mode does not affect the size and performance of finished cable, and no more than 1 spindle is spliced at any weaving point of the shielding layer.

[0005] As a further solution of the utility model, the weaving density of the shielding layer should be no less than 85%, except the cable core with outer diameter greater than 7.9mm, the weaving angle should be no less than 50°, no more than 72°.

[0006] As a further solution of the utility model, the manufacturing material of the sheath layer is polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite film and PTFE raw material tape winding type sheath, is formed by two layers of tape winding, the first layer is polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite tape winding, and the covering rate is not less than 50%, the second layer is PTFE raw material tape reverse cross winding, and the covering rate should be not less than 50%, the thickness of the sheath layer is 0.09 millimeter minimum, 0.14 millimeter maximum, the sheath layer is arranged as the structure of easy peeling, and the shielding layer and the insulating layer are not damaged when peeling.

[0007] As a further solution of the utility model, the insulating layer is not more than 3.2 millimeters under the condition of 230±2 DEG C x 6h, and there is no delamination or interlayer separation phenomenon between the insulating layer and the sheath layer under the condition of 260±2 DEG C x 48h, and the conductor inner layer breaking elongation rate is not less than 6% for the section 0.5 square millimeter or less, and not less than 10% for the section 0.5 square millimeter and above.

[0008] Compared with the related art, the polytetrafluoroethylene push-pull insulated cable provided by the utility model has the following beneficial effects:

[0009] 1, the utility model discloses a silver-plated round copper wire and nickel-plated round copper wire are used to make the conductor inner layer, so that the conductor inner layer has excellent electrical properties, and the conductor is high-temperature resistant, and there is no breakdown phenomenon in the withstand voltage test, the sheath layer is wound by multiple layers, so that the sheath layer has good strength, can provide good protection for the conductor inner layer, and the sheath layer is arranged as an easy-to-peel structure, so as to be peeled, and the shielding layer and the insulating layer are not damaged when peeling, and the possible economic loss in use is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to facilitate the understanding of those skilled in the art, the utility model will be further described below with reference to the drawings.

[0011] Figure 1 It is the cross-sectional structure schematic view of the utility model discloses a kind of polytetrafluoroethylene push-pull insulated cable.

[0012] In the drawing: 1, conductor inner layer;2, insulating layer;3, shielding layer;4, sheath layer. DETAILED DESCRIPTION

[0013] Please refer to Figure 1The utility model provides a kind of polytetrafluoroethylene push insulation cable, including conductor inner layer 1, the outside of conductor inner layer 1 is provided with insulation layer 2, the outside of insulation layer 2 is provided with shielding layer 3, the outside of shielding layer 3 is provided with sheath layer 4, the manufacturing material of conductor inner layer 1 is silver-plated round copper wire and nickel-plated round copper wire, conductor inner layer 1 should be concentric when stranding, adjacent layer can be same direction stranding, outer layer must be left direction, but when the outer layer stranding of conductor inner layer 1, stranding direction can be right direction, insulation layer 2 should be around polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite film and polytetrafluoroethylene raw material belt combination insulation, insulation layer 2 should use single layer or multilayer around, single layer around coverage should be no less than 67%, when multilayer around, around overlap ratio should be no less than 50%, the around direction of adjacent layer should be opposite, insulation layer 2 should be sintered after around and melt sealed, around insulation film belt allows to be connected, the length of the connection place should be no more than 26 millimeters, the insulation connection between different layers should not overlap, the outer diameter of the connection place exceeds the value of maximum outer diameter should be no more than 5 times the nominal thickness of film, single layer belt insulation is 7 times, the connection of the outermost insulation belt in 45 meters finished wire cannot exceed a place, shielding layer 3 uses braided structure, shielding layer 3 uses the weaving mode of joint when weaving, this weaving mode does not affect the size and performance of finished cable, and there is no more than 1 spindle splicing at any weaving point of shielding layer 3.

[0014] Preferably, the weaving density of shielding layer 3 should be no less than 85%, except the cable core with outer diameter greater than 7.9 millimeters, the weaving angle should be no less than 50°, no more than 72°;

[0015] Preferably, the manufacturing material of sheath layer 4 is polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite film and PTFE raw material belt around type sheath, which is composed of two layers of belt around, the first layer is polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite belt around, and the overlap ratio is no less than 50%, the second layer is PTFE raw material belt reverse cross around, and the overlap ratio should be no less than 50%, the thickness of sheath layer 4 is minimum 0.09 millimeter, maximum 0.14 millimeter, sheath layer 4 is set to easy-to-peel structure, and the peeling does not damage shielding layer 3 and insulation layer 2;

[0016] Preferably, the shrinkage of insulation layer 2 under the condition of 230±2 ℃×6h is no more than 3.2 millimeters, there is no delamination or interlayer separation phenomenon between insulation layer 2 and sheath layer 4 under the condition of 260±2 ℃×48h, and the breaking elongation of conductor inner layer 1 is no less than 6% for cross section below 0.5 square millimeter and no less than 10% for cross section 0.5 square millimeter and above.

[0017] The standard parts used in the embodiment can be directly purchased from the market, and can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the mechanical, part and equipment adopt the conventional type in the prior art, and the components known by the person skilled in the art, the structure and principle thereof can be known by the person skilled in the art through the technical manual or through the conventional experimental method.

[0018] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations of these embodiments can be made without departing from the principles and spirits of the utility model, or directly or indirectly applied, in other related technical fields, the scope of the utility model is defined by the appended claims and their equivalents, and the same reason includes in the patent protection scope of the utility model.

Claims

1. A polytetrafluoroethylene push-through insulated cable comprising a conductor inner layer (1), characterized in that: The conductor inner layer (1) is provided with an insulation layer (2) outside, the insulation layer (2) is provided with a shielding layer (3) outside, the shielding layer (3) is provided with a sheath layer (4) outside, the conductor inner layer (1) is made of silver-plated round copper wire and nickel-plated round copper wire, the conductor inner layer (1) should be concentrically stranded when stranded, the adjacent layers can be stranded in the same direction, and the outer layer must be leftward, but when the conductor inner layer (1) is stranded, the outer layer can be rightward, the insulation layer (2) should be combined with polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite film and polytetrafluoroethylene raw tape insulation, and the insulation layer (2) should be wrapped by single layer or multiple layers, the single layer wrapping coverage should be no less than 67%, the multiple layer wrapping coverage should be no less than 50%, the wrapping directions of adjacent layers should be opposite, the insulation layer (2) should be sintered and sealed after wrapping, the film tape of the wrapped insulation is allowed to be connected, the length of the connection part should be no more than 26 mm, the insulation connection between different layers should not overlap, the outer diameter of the connection part exceeding the maximum outer diameter should be no more than 5 times the nominal thickness of the film, the single layer tape insulation is 7 times, and the connection of the outermost insulation tape in the 45-meter finished wire cannot exceed one place.

2. A polytetrafluoroethylene push-through insulated electrical cable according to claim 1, characterised in that: The shielding layer (3) adopts a woven structure, and the shielding layer (3) is woven by using a joint weaving method, the weaving method does not affect the size and performance of the finished cable, and no more than 1 spindle is spliced at any weaving point of the shielding layer (3).

3. A polytetrafluoroethylene push-through insulated electrical cable according to claim 1, characterized in that: The shielding layer (3) has a weaving density of no less than 85%, and the weaving angle is no less than 50° and no more than 72°, except for the cable core with an outer diameter of more than 7.9 mm.

4. A polytetrafluoroethylene push-through insulated electrical cable according to claim 1, characterized in that: The sheath layer (4) is made of polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite film and PTFE raw tape wrapping type sheath, and is wrapped by two layers of tapes, the first layer is polytetrafluoroethylene / polyimide / polytetrafluoroethylene composite tape wrapping, and the coverage rate is no less than 50%, and the second layer is PTFE raw tape reverse cross wrapping, and the coverage rate is no less than 50%, the thickness of the sheath layer (4) is 0.09 mm at least and 0.14 mm at most, and the sheath layer (4) is provided in an easy-to-peel structure, and the shielding layer (3) and the insulation layer (2) are not damaged when peeled. The insulation layer (2) has a shrinkage of no more than 3.2 mm under the condition of 230±2 ℃×6 h, and the insulation layer (2) and the sheath layer (4) have no delamination or interlayer separation phenomenon under the condition of 260±2 ℃×48 h, and the conductor inner layer (1) has a breaking elongation of no less than 6% for a cross section of 0.5 square millimeters or less and no less than 10% for a cross section of 0.5 square millimeters or more.

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