CN219435571U - Sheath insulation fold-proof cable - Google Patents

Abstract

The utility model discloses a sheath insulation fold-proof cable, which comprises a wire core, a bulletproof wire winding belt and an insulation sheath from inside to outside, wherein the wire core comprises a plurality of stranded core wires and a filling belt filled in the gaps of the core wires, the bulletproof wire winding belt is spirally wound on the wire core, the spiral pitch of the bulletproof wire winding belt is smaller than the stranded pitch of the core wires, and the insulation sheath is coated outside the wire core and the bulletproof wire winding belt and is in direct contact with the core wires. The utility model can prevent the cable insulating sheath from being wrinkled to cause rapid abrasion, and prolong the service life of the cable.

Description

Sheath insulation fold-proof cable

Technical Field

The utility model relates to a cable, in particular to a sheath insulation crease-resistant cable.

Background

The common cable comprises a core wire and an outer sheath, wherein the core wire is directly extruded out of the outer sheath after being cabled, but the cable with the structure has low tensile strength and is difficult to meet the requirement of high-frequency swinging test. In order to improve the tensile strength of the core wire after cabling, the prior art needs to increase filling and increase overall tensile strength when cabling the core wire, but in order to ensure the roundness and the overall tensile resistance of the cable, the filler of the cable needs to be fixed by a wrapping belt, namely, a layer of wrapping belt is wrapped after cabling the core wire, and then the outer sheath is extruded. The utility model has the advantages of the band all has certain elasticity, leads to outer cable sheath to appear fluffy after the extrusion, and secondly the band is fixed can lead to outer sheath insulation and heart yearn unable direct contact, has the space, finally leads to the cable when bending, and outer insulation appears the fold, reduces cable life, also can not reach the requirement of high-frequency swaying test.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a sheath insulation anti-wrinkling cable, which solves the problem of sheath wrinkling.

The technical scheme of the utility model is as follows: the utility model provides a sheath insulation prevents fold cable, from inside to outside includes sinle silk, shellproof silk winding area and insulating sheath, the sinle silk includes a plurality of transposition heart yearns and fills the filler tape in heart yearn clearance, shellproof silk winding area spiral winding in on the sinle silk, shellproof silk winding area's spiral pitch is less than the transposition pitch of heart yearn, insulating sheath cladding in the sinle silk with shellproof silk winding is out of band and with heart yearn direct contact.

Further, the spiral pitch of the bullet-proof wire wound tape is 0.1 to 0.8 times the twisting pitch of the core wire. Too small a helical pitch, although it is good to fix the core and the filler tape, reduces the contact surface of the sheath with the core, is unfavorable for the sheath to resist wrinkles and is unfavorable for the ballistic wire to exert a tensile effect.

Further, the winding direction of the bullet-proof wire winding tape is opposite to the twisting direction of the core wire. The spiral winding opposite to the twisting direction of the core wire can increase the spiral pitch to improve the tensile property and ensure the effective fixation of the core wire and the filling belt.

Further, the ballistic filament wound tape is 50D to 100D.

The technical scheme provided by the utility model has the advantages that:

the wrapping tape of the bulletproof wire is adopted to replace wrapping tape, the wrapping tape is wrapped with larger pitch (compared with the wrapping tape which is completely wrapped) so that the insulating sheath can be in close contact with the core wire, the filling tape in the cable can be fully fixed with the core wire, the filling tape and the outer insulating sheath are more tightly gapless, and meanwhile, the bulletproof wire wrapping tape has good tensile property, so that the problems of fluffiness of the cable and abrasion of the insulating sheath are solved, the tensile effect of the cable by 1.5 times is improved, the service life of the cable is greatly prolonged, the requirement of a swinging test can be met, and the cable is easier to bend and fix the processing end required by the cable.

Drawings

Fig. 1 is a schematic cross-sectional structure of a sheath-insulated wrinkle-preventing cable of an embodiment.

Fig. 2 is a schematic structural view of a sheath-insulated wrinkle-preventing cable of embodiment 1.

Fig. 3 is a schematic structural view of a sheath-insulated wrinkle-preventing cable of example 2.

Detailed Description

The present utility model is further described below with reference to examples, which are to be construed as merely illustrative of the present utility model and not limiting of its scope, and various modifications to the equivalent arrangements of the present utility model will become apparent to those skilled in the art upon reading the present description, which are within the scope of the appended claims.

In embodiment 1, as shown in fig. 1 and fig. 2, the sheath insulated crease-resistant cable of the embodiment sequentially includes, from inside to outside, a core 1, a bulletproof wire winding belt 2 and an insulating sheath 3, wherein the core 1 is formed by twisting three core wires 11 and three filling belts 12 together, and the core wires 11 are composed of a central conductor 11a and an insulating layer 11b coated on the conductor 11 a. The filling belt 12 is positioned between the core wires 11, and the filling belt 12 is composed of a plurality of fibers, so that the space between the core wires 11 is filled to improve the roundness of the core wire 1, and the fibers with higher tensile strength can be adopted to improve the tensile property of the whole cable. The core wire 11 and the filler tape 12 were twisted clockwise at a pitch of 4cm at the time of twisting.

And a bulletproof wire winding belt 2 which is wound anticlockwise by 50D with 8mm as a pitch is wound outside the stranded wire core 1, and the core wire 11 and the filling belt 12 are fixed. The diameter of the 50D bullet-proof wire winding belt 2 is about 0.025mm, so that most of the core wires 11 and the filling belts 12 are exposed, and finally, the insulating sheath 3 is extruded outside the core wires 1 of the winding bullet-proof wire winding belt 2, and the insulating sheath 3 can be in direct close contact with the core wires 11 and the filling belts 12 without gaps. The sheath 3 insulating crease-resistant cable can meet 2000 ten thousand swinging requirements.

In embodiment 2, please refer to fig. 1 and 3, the sheath 3 insulation anti-wrinkling cable of the embodiment sequentially comprises a wire core 1, a bulletproof wire winding belt 2 and an insulation sheath 3 from inside to outside, wherein the wire core 1 is formed by twisting three core wires 11 and three filling belts 12 together, and the core wires 11 are composed of a central conductor and an insulation layer coated on the conductor. The filler tape 12 is positioned between the core wires 11, and the core wires 11 and the filler tape 12 are twisted clockwise with a pitch of 6cm at the time of twisting.

The wound bulletproof wire tape 2 of 75D is wound clockwise with 3cm pitch outside the stranded wire core 1, and the wound bulletproof wire tape 2 wound in the same direction with smaller pitch can also fix the core wire 11 and the filling tape 12. Finally, the insulating sheath 3 is extruded outside the wire core 1 wound with the bulletproof wire winding belt 2, and the insulating sheath 3 can still form direct contact with the core wire 11 and the filling belt 12 in a large area, thereby playing a role in crease resistance.

It should be noted that the above-described embodiment is given only as an example of a cable structure in which the number of core wires 11 and filler tapes 12 is not limited to three, and may be provided as desired. The helical pitch of the ballistic wire wrapping tape 2 may be selected to be in the range of 0.1 to 0.8 times the twisting pitch of the core wire 11 to ensure sufficient contact of the insulating sheath 3 with the core wire 11 and to secure the core wire 11 and the filler tape 12 by the ballistic wire wrapping tape 2.

Claims (4)

1. The utility model provides a sheath insulation prevents fold cable, its characterized in that includes sinle silk, shellproof silk winding area and insulating sheath from inside to outside, the sinle silk includes a plurality of transposition heart yearns and fills the filler tape in heart yearn clearance, shellproof silk winding area spiral winding in on the sinle silk, shellproof silk winding area's spiral pitch is less than the transposition pitch of heart yearn, insulating sheath cladding in sinle silk with shellproof silk winding is out of band and with heart yearn direct contact.

2. The sheath-insulated, wrinkle-resistant cable according to claim 1, wherein the helical pitch of the ballistic filament wound tape is 0.1 to 0.8 times the lay pitch of the core.

3. The sheath-insulated, wrinkle-resistant cable according to claim 1 or 2, wherein the winding direction of the ballistic filament wound tape is opposite to the twisting direction of the core wire.

4. The jacketed insulated, wrinkle-resistant cable of claim 1, wherein the ballistic filaments are 50D to 100D.