CN219979187U - High-flexibility torsion-resistant cable - Google Patents

Abstract

The utility model discloses a high-flexibility torsion-resistant cable, which comprises: the flexible conductor, the drainage wire, winding shielding layer and sheath, it forms insulating core to extrude the package on the flexible conductor and has ETFE insulating layer, every two insulating core twisted pair form a set of twisted pair core unit, drag the package on twisted pair core unit has first PTFE band, four sets of twisted pair core unit transposition is on the center fill rope that has the foaming layer, it has three first filling ropes that have the foaming layer to fill between four sets of twisted pair core units, drag the package on four sets of twisted pair core units has the second PTFE band layer, be provided with the winding shielding layer on the second PTFE band layer, be provided with the drainage wire between second PTFE band layer and winding shielding layer, the drainage ply-lock is established between two sets of twisted pair core units that do not have the foaming layer, drag the package has two-layer third PTFE band on the winding shielding layer, it has the sheath to extrude on the third PTFE band layer. The cable has the advantages of improving the tensile property, flexibility and twisting resistance of the cable, absorbing shock and improving EMC (electro magnetic compatibility).

Description

High-flexibility torsion-resistant cable

Technical Field

The utility model relates to the field of cables, in particular to a high-flexibility torsion-resistant cable.

Background

In the automatic production process, a large number of mechanical arms are required to be used for carrying out auxiliary operation, the mechanical arms are required to be electrified and transmit signals through the cables, the mechanical arms can make the cables frequently twist, pull and the like in a series of actions during action, so that the requirements on twisting resistance, tensile strength and flexibility of the cables are higher and higher, the cable on the market at present is improved in tensile property and flexibility through arranging a filling rope, the twisting resistance of the cables is improved through arranging a winding shielding layer, the filling rope can improve the tensile property and flexibility of the cables, but does not have shock absorption effect, the service life of the cables is also reduced, and the winding shielding layer can improve the twisting resistance but reduce the EMC (electro magnetic compatibility) performance of the cables.

Disclosure of Invention

The utility model aims to provide a high-flexibility torsion-resistant cable which has higher tensile property, flexibility and torsion resistance, shock absorption effect and EMC (electro magnetic compatibility) performance.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a highly flexible torsion-resistant cable comprising: the flexible conductor, the drainage wire, winding shielding layer and sheath, it forms insulating core to extrude the package on the flexible conductor to have ETFE insulating layer, every two insulating core pair twists and forms a set of pair twisted wire core unit, drag the package on pair twisted wire core unit and have first PTFE band, the pitch between every set of pair twisted wire core unit is all different, four sets of pair twisted wire core units twine mutually as the centre of a circle with the center filling rope, it has the foaming layer to extrude on the center filling rope to have the drainage wire on the center filling rope, it has three first filling ropes to fill between four sets of pair twisted wire core units, drag the package on first filling rope to have the foaming layer too, drag the package on the lateral wall of four sets of pair twisted wire core units to have the second PTFE band layer, drag the foaming layer on second PTFE band layer and pair twisted wire core unit simultaneously, twine and be provided with winding shielding layer on the second PTFE band layer, be provided with the drainage wire between second PTFE band layer and winding shielding layer, the drainage wire is established between two sets of pair twisted wire core units of not filling rope, it has the PTFE band layer to be located on the third layer, it has the third to extrude on the PTFE band layer to have the third layer.

Further, the foregoing high flexibility torsion-resistant cable, wherein the foaming degree of the foamed layer on the center-fill cord and the first fill cord is controlled to be between 75 and 80%, the cross-sectional radius of the center-fill cord and the first fill cord=0.414×the radius of the twisted wire core unit× (0.8 to 0.85), and the thickness of the foamed layer=0.414×the radius of the twisted wire core unit× (0.35 to 0.3).

Further, in the high-flexibility torsion-resistant cable, the foaming degree of the foaming layer on the second filling rope is controlled to be 75-80%, two second filling ropes are filled in each pair of twisted wire core units, the foaming layer is extruded on the second filling rope, the section radius of the second filling rope=0.667×the radius of the insulating twisted wire core (0.8-0.85), and the thickness of the foaming layer is 0.667×the radius of the insulating wire core (0.35-0.3).

Further, the high-flexibility torsion-resistant cable is characterized in that the central filling rope, the first filling rope and the second filling rope are any one of cotton ropes, PP ropes, non-woven fabrics ropes, glass fiber ropes and the like.

Further, the high-flexibility torsion-resistant cable is characterized in that the flexible conductor is formed by twisting 70-75 oxygen-free copper wires with the thickness of 0.05 mm.

Further, in the high-flexibility torsion-resistant cable, the winding shielding layer is formed by winding tinned copper wires, and the winding density is 100%.

Further, the high-flexibility torsion-resistant cable is characterized in that the drainage wire is formed by twisting 60-70 tinned copper wire bundles with the thickness of 0.07mm, and the cross-sectional area of the drainage wire is 0.25-0.27 mm ² 。

Further, the high-flexibility torsion-resistant cable is characterized in that the sheath is made of PUR materials.

The utility model has the advantages that: the central filling rope, the first filling rope and the second filling rope are all extruded with foaming layers, the insulating wire core is extruded on the foaming layers of the second filling rope, the pair twisting wire core units are extruded on the foaming layers of the central filling rope and the first filling rope, the insulating wire core and the pair twisting wire core units can be filled with complete circles, the foaming layers can form a limiting groove which can limit the insulating wire core and/or the pair twisting wire core units after being extruded, the insulating wire core and the pair twisting wire core units cannot be misplaced when the cable is bent and twisted, the signal transmission efficiency cannot be affected, and the foaming layers have an energy absorption effect, so that the shock absorption effect on the cable is achieved, and the service life of the cable is prolonged; the roundness of the twisted wire core units can be improved by wrapping the twisted insulating wire cores with the first PTFE wrapping tape layer, the roundness of the whole cable can be improved by wrapping the four groups of twisted wire core units with the second PTFE wrapping tape layer, and the drainage wire is arranged on the outer side of the second PTFE wrapping tape layer to play a tensioning role on the second PTFE, so that the second PTFE wrapping tape layer can wrap the four groups of twisted wire core units more tightly, and the compactness of the cable is improved; EMC performance of the cable can be improved by utilizing the drainage wire and the winding shielding layer; the two layers of third PTFE tape layers are draged between the winding shielding layer and the sheath, the third PTFE tape layer of the inner layer is attached to the winding shielding layer, the outer layer of the third PTFE tape layer is adhered to the sheath, so that strong adhesion between the winding shielding layer and the sheath can not occur, but the winding shielding layer and the sheath can be adhered together through self-adhesion friction between the third PTFE tape layers, interference between the winding shielding layer and the sheath can not occur during bending and twisting, and the bending performance of the cable is ensured.

Drawings

Fig. 1 is a schematic structural view of a high flexibility torsion-resistant cable according to the present utility model.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and the preferred embodiments.

As shown in fig. 1, the high-flexibility torsion-resistant cable according to the present utility model is characterized in that: comprising the following steps: the flexible conductor 1, the drainage wire 2, the winding shielding layer 3 and the sheath 4, the flexible conductor 1 is formed by re-twisting 70-75 oxygen-free copper wires with the average linear expansion coefficient being close to that of carbon steel, so that the flexibility and tensile strength of the flexible conductor 1 are improved, an ETFE insulating layer 5 is extruded on the flexible conductor 1 to form an insulating wire core, the ETFE insulating layer 5 is extremely strong in tearing resistance, high in insulating strength, low in dielectric constant, high in resistivity and low in dissipation factor, has excellent electrical insulation performance, basically constant in insulating performance under the condition of frequency and temperature change, and the ETFE insulating layer 5 has strong adhesive property to metal, and the average linear expansion coefficient of the ETFE insulating layer 5 is close to that of carbon steel, so that the ETFE insulating layer 5 has extremely excellent negative pressure resistance, can keep good contact with the flexible conductor 1, stability of a transmission signal in a dynamic operation process is guaranteed, compared with the insulating materials such as PVC, PE, TPE with the same voltage level, the ETFE insulating layer 5 can meet the signal transmission function of a cable under smaller insulating thickness, the transmission loss of the cable can also be reduced, and the cable has better torsional flexibility than the insulating wire core of the cable core with the same insulating layer with the same diameter, and the insulation layer with the cable core has better insulating property, and the insulation performance is PVC, PE, TPE.

Every two insulated wire cores are twisted to form a group of twisted wire core units 6, the pitches between every two twisted wire core units 6 are different, the different pitches can resist partial electromagnetic wave interference from the outside, the signal interference between every two twisted wire core units 6 can be reduced, a second filling rope 61 is filled in the gap between two insulated wire cores in each twisted wire core unit 6, a foaming layer A is extruded on the second filling rope 61, a first PTFE wrapping belt 62 is towed on each twisted wire core unit 6, the first PTFE wrapping belt 62 wraps the twisted wire core units 6, the twisted wire core units 6 are prevented from being loose, the first PTFE wrapping belt 62 and the second filling rope 61 are matched to ensure roundness of the twisted wire core units 6, the first PTFE wrapping belt 62 applies pressure to the second filling rope 61, a foaming layer A on the second filling rope 61 is tightly abutted against two insulated wire cores in the twisted wire core units 6, a groove matched with the two insulated wire cores is formed on the foaming layer A on the second filling rope 61, and the insulated wire cores are prevented from being misplaced when the insulated wire cores are bent and limited.

The four twisted wire core units 6 are twisted by taking the central filling rope 7 as the center, the central filling rope 7 is also extruded with a foaming layer A, the four twisted wire core units 6 are extruded on the foaming layer A on the central filling rope 7 together, the four twisted wire core units 6 are extruded on the foaming layer A of the central filling rope 7 to form limit grooves matched with the twisted wire core units 6 on the foaming layer A, three first filling ropes 71 are filled between the four twisted wire core units 6, the first filling ropes 71 are also extruded with the foaming layer A, the outer side walls of the four twisted wire core units 6 are also drawn with second PTFE tape layers 8, the second PTFE tape layers 8 are tightly wrapped on the foaming layers A of the four twisted wire core units 6 and the first filling ropes 71, the second PTFE tape layers 8 apply pressure on the first filling ropes 71 to enable the foaming layers A on the first filling ropes 71 to tightly lean against two adjacent twisted wire core units 6, two limit grooves matched with two adjacent twisted wire core units 6 are formed in the foaming layer A on the first filling rope 71, a winding shielding layer 3 is wound on the second PTFE tape layer 8, a drainage wire 2 is arranged between the second PTFE tape layer 8 and the winding shielding layer 3, the drainage wire 2 is clamped between the two twisted wire core units 6 without the first filling rope 71, at the moment, the drainage wire 2 plays a tensioning role on the second PTFE tape layer 8, so that the second PTFE tape layer 8 can pack four twisted wire core units 6 more tightly, the four twisted wire core units 6 are more compact, the drainage wire 2 plays a limit role on the two adjacent twisted wire core units 6 like the first filling rope 71, the central filling rope 7, the first filling rope 71 and the drainage wire 2 cooperate together to ensure the roundness of a cable, and prevents the misalignment of the wire core unit 6 during bending and twisting.

In the embodiment, the drainage wire 2 is formed by twisting 60-70 tinned copper wire bundles with the thickness of 0.07mm, and the cross-sectional area of the drainage wire 2 is 0.25-0.27 mm ² The winding shielding layer 3 is formed by winding tinned copper wires, the winding density is 100%, the drainage wire 2 and the winding shielding layer 3 do not influence the flexibility of the cable, and the drainage wire 2 is matched with the winding shielding layer 3 to further improve the EMC performance of the cable.

The cable is characterized in that two layers of third PTFE tape layers 9 are dragged and wrapped on the winding shielding layer 3, the sheath 4 made of PUR materials is extruded and wrapped on the third PTFE tape layers 9 positioned on the outer side, the sheath 4 made of PUR materials is excellent in oil resistance, good in toughness, wear-resistant, low-temperature-resistant, water-resistant, ageing-resistant and acid-alkali-resistant, and suitable for severe occasions such as greasy dirt, acid-base and low-temperature environments, so that the requirements of the cable on wear resistance, bending resistance and softness can be better met, the stranded elements in the sheath 4 can be effectively protected from being damaged when the cable is bent, dragged and twisted, the third PTFE tape layers 9 on the outer layer are adhered with the sheath 4 when the sheath 4 is extruded, and the third PTFE tape layers 9 on the inner layer are adhered on the winding shielding layer 3, and the third PTFE tape layers 9 on the inner layer are in friction connection with the third PTFE tape layers 9 on the outer layer, so that the strong adhesion between the winding shielding layer 3 and the sheath 4 is guaranteed, the copper wires in the winding shielding layer 3 can be prevented from being damaged in the sheath 4, and the tin plating layer 4 can not interfere with the winding shielding layer 4 when the cable is twisted.

In this embodiment, the center-fill cord 7, the first fill cord 71, and the second fill cord 61 are any one of cotton cords, PP cords, nonwoven cords, glass fiber cords, and the like. In any of the above materials, the hardness is higher than that of the ETFE insulating layer 5, and the insulating core and twisted core units 5 are extruded with the ETFE insulating layer 5 when twisted, so that the ETFE insulating layer 5 is extruded and deformed, and the roundness of the cable is affected, so that it is necessary to extrude the foam layer a having a hardness lower than that of the ETFE insulating layer 5 on the center filling cord 7, the first filling cord 71, and the second filling cord 61, and the foaming degree of the foam layer a is controlled to be 75 to 80%. However, the diameters of the center-fill cord 7, the first fill cord 71, and the second fill cord 61 cannot be too small or too large, so that the stranded structure between stranded elements in the cable is easily loosened due to the too large diameter, and the ETFE insulating layer 5 is easily deformed by extrusion, and in actual production, the optimal diameters of the fill cords and the optimal thickness of the foam layer a are obtained by experimental calculation:

the cross-sectional radius of the center-fill cord 7 and the first fill cord 71=0.414×the radius of the twisted wire core unit 6× (0.8 to 0.85), and the thickness of the foamed layer a on the center-fill cord 7 and the first fill cord 71=0.414×the radius of the twisted wire core unit 6× (0.35 to 0.3), the formula being applicable only to the case of twisting four sets of twisted wire core units 6;

the second filling rope 61 has a section radius=0.667×radius of the insulated twisted wire core× (0.8-0.85), and the thickness of the foaming layer a on the second filling rope 61 is 0.667×radius of the insulated wire core× (0.35-0.3), and the formula is only applicable to the case of twisted wire pairs of two insulated wire cores;

when the wire diameter of each filling rope and the thickness of the foaming layer A obtained through the calculation are actually operated, the depth of the limiting groove formed by extruding the pair of twisted wire core units 6 by the foaming layer A on the central filling rope 7 and the first filling rope 71 is about 40-45% of the thickness of the foaming layer A, the depth of the limiting groove formed by extruding the insulating wire core by the foaming layer A on the second filling rope 61 is about 35-40% of the thickness of the foaming layer A, and when the extrusion deformation of the foaming layer A is between 30-50%, the limiting groove formed by the foaming layer A can play a good limiting role on the insulating wire core or the pair of twisted wire core units 6, and the filling rope with higher hardness can play a good full-round filling role in cooperation with the foaming layer A, and the foaming layer A is extruded but also has a certain energy absorption characteristic, so that the shock absorption performance of the cable is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the utility model without departing from the spirit and scope of the utility model, which is intended to be covered by the claims.

Claims (8)

1. A high flexibility torsion resistant cable characterized by: comprising the following steps: the flexible conductor, the drainage wire, winding shielding layer and sheath, it forms insulating core to extrude the package on the flexible conductor to have ETFE insulating layer, every two insulating core pair twists and forms a set of pair twisted wire core unit, drag the package on pair twisted wire core unit and have first PTFE band, the pitch between every set of pair twisted wire core unit is all different, four sets of pair twisted wire core units twine mutually as the centre of a circle with the center filling rope, it has the foaming layer to extrude on the center filling rope to have the drainage wire on the center filling rope, it has three first filling ropes to fill between four sets of pair twisted wire core units, drag the package on first filling rope to have the foaming layer too, drag the package on the lateral wall of four sets of pair twisted wire core units to have the second PTFE band layer, drag the foaming layer on second PTFE band layer and pair twisted wire core unit simultaneously, twine and be provided with winding shielding layer on the second PTFE band layer, be provided with the drainage wire between second PTFE band layer and winding shielding layer, the drainage wire is established between two sets of pair twisted wire core units of not filling rope, it has the PTFE band layer to be located on the third layer, it has the third to extrude on the PTFE band layer to have the third layer.

2. A highly flexible torsion resistant cable according to claim 1, wherein: the foaming degree of the foaming layers on the central filling rope and the first filling rope is controlled between 75-80%, the section radius of the central filling rope and the first filling rope is=0.414×the radius of the pair-twisted wire core unit is× (0.8-0.85), and the thickness of the foaming layers is=0.414×the radius of the pair-twisted wire core unit is× (0.35-0.3).

3. A highly flexible torsion-resistant cable according to claim 2, wherein: the foaming degree of the foaming layer on the second filling rope is controlled between 75-80%, two second filling ropes are filled in each pair of twisted wire core units, the foaming layer is extruded on the second filling rope, the section radius of the second filling rope=0.667×the radius of the insulating twisted wire core (0.8-0.85), and the thickness of the foaming layer is 0.667×the radius of the insulating wire core (0.35-0.3).

4. A highly flexible torsion-resistant cable according to claim 3, wherein: the central filling rope, the first filling rope and the second filling rope are any one of cotton ropes, PP ropes, non-woven fabrics ropes, glass fiber ropes and the like.

5. A highly flexible torsion resistant cable according to any one of claims 1 to 4, wherein: the flexible conductor is formed by twisting 70-75 oxygen-free copper wires with the thickness of 0.05 mm.

6. A highly flexible torsion resistant cable according to any one of claims 1 to 4, wherein: the winding shielding layer is formed by winding tinned copper wires, and the winding density is 100%.

7. A highly flexible torsion resistant cable according to any one of claims 1 to 4, wherein: the drainage wire is formed by twisting 60-70 tinned copper wire bundles with the thickness of 0.07mm, and the cross section area of the drainage wire is 0.25-0.27 mm ² 。

8. A highly flexible torsion resistant cable according to any one of claims 1 to 4, wherein: the sheath is made of PUR material.