CN217086170U - Bending-resistant cable - Google Patents

Abstract

The application relates to the technical field of signal transmission, and discloses a bending-resistant cable, including two wires that set up side by side, the wire all includes conductor, inner insulation layer, outer insulation layer and the oversheath that sets gradually from inside to outside, two the oversheath of wire is connected in the position that is close to each other. Two minor diameter wires that set up side by side in this application replace the difficult wire of buckling of a major diameter in keeping the unchangeable performance of buckling that promotes the cable of cable cross-sectional area, the insulating layer of cable divide into internal insulation layer and external insulation layer two parts simultaneously, can slide each other between the two-layer insulating layer, pulling force and pressure decompose when making the cable crooked, the insulating layer thickness that the injection molding machine single was extruded simultaneously reduces the internal stress of insulating layer, the difficult rupture of insulating layer when making the cable buckle.

Description

Bending-resistant cable

Technical Field

The application relates to the technical field of signal transmission, in particular to a bending-resistant cable.

Background

Along with the technological progress, the signal transmission speed is required to be increased in various industries needing signal transmission, the working current of the cable is increased, and the thickness of the insulating layer is increased to ensure the insulativity of the cable. When a thick insulating layer is extruded at one time, in order to avoid the phenomenon of sagging caused by too large gravity of the sizing material during extrusion, the pressure of extruding the sizing material is increased by the injection molding machine when the thick insulating layer is extruded at one time. When extrusion pressure is increased, internal stress between the extruded insulating layers is large, the cable is integrally hard due to the large internal stress and the large thickness, and the cable is very easy to break and crack under the repeatedly bent working environment, so that the service life of the cable is greatly reduced, the safe and reliable use requirements are difficult to meet, and the safety of equipment is very influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a resistant crooked cable, the resistant performance of buckling of promotion cable is in order to adapt to the operational environment that need buckle repeatedly.

The application provides a resistant crooked cable adopts following technical scheme:

the utility model provides a resistant crooked cable, includes two wires that set up side by side, the wire all includes conductor, inner insulation layer, outer insulation layer and the oversheath that sets up coaxially from inside to outside in proper order, two the oversheath of wire 100 is connected in the position that is close to each other.

Through adopting above-mentioned technical scheme, the difficult wire of buckling of major diameter is replaced to two minor diameter wires that set up side by side, promotes the performance of buckling of cable under the unchangeable condition of cable total cross sectional area, the insulating layer of cable divide into internal insulation layer and external insulation layer two parts simultaneously, can slide each other between the two-layer insulating layer, pulling force and pressure decompose when making the cable crooked, the insulating layer thickness that the injection molding machine single was extruded simultaneously reduces the internal stress of insulating layer, the difficult rupture of insulating layer when making the cable buckle.

Preferably, the conductor includes a plurality of wire cores, and the plurality of wire cores are twisted with each other.

By adopting the technical scheme, the curvature of the cable with the mutually twisted wire cores is not concentrated at one position when the cable is bent, but is distributed on each wire core, the smaller the diameter of each wire core is, the smaller the bending stress generated when the cable is bent is, so that the plastic deformation can not occur under the condition of allowing the bending radius, and the insulating layer of the cable is not easy to damage.

Preferably, the layer thickness of the inner insulating layer is smaller than the layer thickness of the outer insulating layer.

Through adopting above-mentioned technical scheme, the bending property of inner insulating layer is superior to outer insulating layer, and when the cable was buckled and is surpassed the limit angle of buckling that outer insulating layer can bear, inner insulating layer still can play certain guard action, reduces the electric leakage risk.

Preferably, the outer insulating layer is coaxially provided with the conducting layer.

Through adopting above-mentioned technical scheme, the electric field that the conducting layer can reduce the conductor and produce influences to the external world.

Preferably, a shielding layer is coaxially arranged outside the conductive layer.

Through adopting above-mentioned technical scheme, the shielding layer can reduce the influence of external electric field to the cable.

Preferably, the shielding layer comprises a shielding tape spirally wound on the conductive layer.

Through adopting above-mentioned technical scheme, the shielding area adopts the helical winding difficult to slide along the cable axis direction when the cable is buckled, reduces the probability that the space appears in the shielding layer.

Preferably, a plurality of protective shells are simultaneously sleeved outside the two outer sheaths, and a gap is reserved between every two adjacent protective shells.

Through adopting above-mentioned technical scheme, the protective housing is used for retraining the oversheath and removes to the direction of perpendicular cable axis, reduces the cracked probability of oversheath junction, and simultaneously, the protective housing has certain space of sliding along the cable direction, can not hinder the cable and buckle in the particular position because of the existence of protective housing.

Preferably, an elastic connecting rope is arranged between the adjacent protective casings.

Through adopting above-mentioned technical scheme, make the interval between the adjacent protective housing remain stable.

Preferably, the elastic connecting rope is bonded with two adjacent outer sheaths.

Through adopting above-mentioned technical scheme, reduce the probability that elastic connection rope and service environment take place the hook to reduce the potential safety hazard.

Drawings

FIG. 1 is a schematic cross-sectional view of a bend-resistant cable;

fig. 2 is a schematic structural view for showing the outer sheath and the connector.

100. A wire; 1. a conductor; 2. an inner insulating layer; 3. an outer insulating layer; 4. a conductive layer; 5. a shielding layer; 6. an outer sheath; 7. a protective shell; 8. the elastic connecting rope.

Detailed Description

A bending-resistant cable is used for improving bending resistance of the cable.

Referring to fig. 1, the bending-resistant cable comprises two wires 100 arranged in parallel, wherein each wire 100 comprises a conductor 1, an inner insulating layer 2, an outer insulating layer 3 and an outer sheath 6 which are coaxially arranged from inside to outside in sequence, the conductor 1 penetrates through the inner insulating layer 2, the outer surface of the conductor 1 is uniformly coated by the inner insulating layer 2, the outer insulating layer 3 is uniformly coated outside the inner insulating layer 2 and uniformly coated by the outer sheath 6, and the outer sheaths 6 of the two wires 100 are integrally formed at positions close to each other. The cable is formed by two wires 100 in parallel, so that the cable with a large diameter and difficult bending is converted into the cable with a cross section area unchanged but reduced diameter and easy bending, two layers of insulating layers jointly generate an insulating effect, the sum of the thicknesses of the two layers of insulating layers is matched with the size of current passing through the conductor 1, the insulating effect is guaranteed, the diameter of the conductor is reduced, the thickness of the insulating layers is further reduced, the pressure of the insulating layers during extrusion is reduced, the internal stress of the insulating layers is reduced, and the cable has better bending property.

Referring to fig. 1, the conductor 1 is formed by spirally winding and twisting a plurality of wire cores around the axis of the conductor 100, so that the flexibility of the cable is increased, the curvature during bending is not concentrated at one position but distributed on each wire core, the smaller the diameter of each wire core is, the smaller the bending stress generated during bending is, and therefore, plastic deformation cannot occur under the condition of allowing the bending radius, and the insulating layer of the cable is not damaged. And meanwhile, each strand of wire core can slide when being bent, and all layers are twisted in opposite directions, so that the internal and external tensile force and pressure of the whole conductor 1 are decomposed. The layer thickness of the inner insulating layer 2 is smaller than that of the outer insulating layer 3, so that the inner insulating layer 2 is easier to bend and deform relative to the outer insulating layer 3, and when the conductor 1 is electrified and vibrated, the inner insulating layer 2 plays a role in buffering between the conductor 1 and the outer insulating layer 3. The outer insulating layer 3 is evenly coated with the conducting layer 4 made of polyvinyl chloride materials, partial discharge is caused due to the fact that a gap possibly exists between the outer insulating layer 3 and the outer sheath 6, the conducting layer 4 is in good contact with the shielded insulating layer, partial discharge between the insulating layer and the outer sheath is avoided, and the polyvinyl chloride has good dielectric performance, so that the conducting layer 4 can store and consume static electricity under the electric field of the conductor 1, induced charges can be generated when the electric field is applied to the conductor, the electric field is weakened, and the influence of the electric field generated by the conductor 1 on the outside is weakened. The conducting layer 4 outside cladding has metal shielding layer 5, and metal shielding layer 5 also plays the effect of shielding the electric field as the passageway of short-circuit current when the short circuit takes place for the system, and shielding layer 5 adopts many tinned copper windings to make, and the cable through winding shielding has characteristics such as the external diameter is little, the wire rod is soft, the price ratio is lower. The outer sheath 6 is made of thermoplastic elastic material, the thermoplastic elastic material has good elasticity, compression deformation resistance, environmental resistance and aging resistance, the application temperature range is wide, and the thermoplastic elastic material has excellent processing performance: the processing method of the thermoplastic plastics such as injection, extrusion and the like can be used for processing, is efficient, simple and feasible, is green and environment-friendly, can be recycled, and has light specific gravity, uniform appearance quality, high surface grade and good hand feeling.

Referring to fig. 2, a plurality of protective cases 7 are sleeved outside two adjacent outer sheaths 6 along the length direction of the outer sheaths, the inner walls of the protective cases 7 are abutted to the outer wall of the outer sheath 6 and can slide along a cable, the protective cases 7 at two ends of the cable are fixedly adhered to the outer sheaths 6 of the cable, the protective cases 7 bound the two wires 100, so that the probability of breakage of the joint of the outer sheaths 6 between the two wires 100 is reduced, a gap is reserved between the adjacent protective cases 7 and is larger than a space required by the limit bending angle of the wire 100, and the phenomenon that the bending of the wire 100 is limited due to the fact that the gap between the adjacent protective cases 7 is too small is avoided. Two elastic connecting ropes 8 are fixedly connected between two ends, close to each other, of the adjacent protective housings 7, the two elastic connecting ropes 8 are respectively arranged on two sides of a plane where the axes of the two wires 100 of the cable are located, and the connection positions between the two elastic connecting ropes 8 and the outer sheaths 6 of the two wires 100 of the cable are in the same plane and the plane is perpendicular to the plane where the axes of the two wires 100 of the cable are located. The elastic connecting rope 8 is arranged in a groove formed between the outer sheaths 6 of the two wires 100, the elastic connecting rope 8 has viscosity, and the elastic connecting rope 8 is adhered to the outer sheaths 6.

The principle of the embodiment is as follows: the two small-cross-sectional-area wires 100 are used for replacing one large-cross-sectional-area wire 100, the diameter of the wire 100 is reduced under the condition that the total cross-sectional area is unchanged, so that the bending property of the wire 100 is improved, the double-layer small-thickness insulating layer replaces the original single-layer large-thickness insulating layer inside the wire 100, under the condition that the total insulating effect is unchanged, the bending property of the insulating layer is improved through the respective processing of the double-layer insulating layer, the mutual influence of the cable and the outside is greatly reduced through the matching of the conducting layer 4 and the shielding layer 5, the bending property of the cable is not influenced when the outer sheath 6 provides protection, the protective shell 7 restrains the two wires 100 of the cable, so that the joint of the outer sheaths 6 of the two wires 100 is not easy to break and the bending of the cable is not influenced, the elastic connecting ropes 8 ensure the uniform distribution of the protective shell 7, and prevent the protective shell 7 from sliding along the cable to cause the loss of protection of certain parts of the cable to cause the splitting of the two wires 100, the elastic connecting rope 8 can be bonded in a groove formed by the outer sheaths 6 of the two conducting wires 100, and the elastic connecting rope 8 is bonded in the groove formed by the outer sheaths 6 of the two conducting wires 100 after the protective shell 7 is adjusted to a proper position, so that the elastic connecting rope 8 is prevented from being hooked on other objects in the use environment to cause accidents.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. A bend resistant cable characterized by: the novel wire harness comprises two wires (100) which are arranged in parallel, wherein each wire (100) comprises a conductor (1), an inner insulating layer (2), an outer insulating layer (3) and an outer sheath (6) which are coaxially arranged from inside to outside, and the outer sheaths (6) of the two wires (100) are connected at positions close to each other.

2. A bend-resistant cable as recited in claim 1, wherein: the conductor (1) comprises a plurality of wire cores, and the wire cores are mutually twisted.

3. A bend-resistant cable as recited in claim 1, wherein: the thickness of the inner insulating layer (2) is smaller than that of the outer insulating layer (3).

4. A bend-resistant cable as recited in claim 1, wherein: and a conductive layer (4) is coaxially arranged outside the outer insulating layer (3).

5. A bend resistant cable as recited in claim 4, wherein: and a shielding layer (5) is coaxially arranged on the outer side of the conducting layer (4).

6. A bend resistant cable as recited in claim 5, wherein: the shielding layer (5) comprises a shielding tape which is spirally wound on the conductive layer (4).

7. A bend-resistant cable as recited in claim 1, wherein: two oversheath (6) overcoat is equipped with a plurality of protective casings (7) simultaneously, and is adjacent leave the clearance between protective casing (7).

8. A bend-resistant cable as recited in claim 7, wherein: an elastic connecting rope (8) is arranged between the adjacent protective casings (7).

9. A bend-resistant cable as recited in claim 8, wherein: the elastic connecting rope (8) is bonded with two adjacent outer sheaths (6).

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