CN205881555U - Lock armo medium voltage power cable - Google Patents

Abstract

The utility model provides a lock armo medium voltage power cable which the structure is: constitute the conductor by many metal filament transposition, ab intra outside the conductor is wrapped up semiconductive shielding layer, insulating layer and insulation screen outside and in proper order and is constituted the sinle silk, the outer cladding of sinle silk has iron shielded layer, it constitutes the return circuit sinle silk to wrap up the insulating layer outward by the return circuit conductor, three packages have sinle silk and three return circuit sinle silks of iron shielded layer, and the interval is adjacent in proper order each other, becomes the axial symmetry transposition and constitutes the cable core, the cable core has around the band layer around the package outward, it has insulating material closely to fill in the cable core, there is the inner liner at crowded package outside the band layer, the inner liner is equipped with the lock armo layer that the strap constitutes outward, crowded package one deck sheath outside the lock armo layer. This cable can stand external powerful destructiveness, even when great pressure and impact force are suffered to the cable, the cable is difficult the puncture also, has improved the security performance, can bear certain axial tension, and its bend radius much lower than steel band is around package type armoured cable, and its light in weight lays the facility, can exempt from the crane span structure and install.

Description

Lock armo medium-pressure power cable

Technical field

This utility model relates to lock armo medium-pressure power cable, particularly to rated voltage 5kV and above, below 46kV Power cable, belong to field of cable technology.

Background technology

Domestic conventional armored cable, many employing steel bands are around pouch-type armouring, and level of security is low, by external world power Time, its defensive ability/resistance ability is poor, is easily caused and punctures, and Heavy Weight, and installation cost is at a relatively high, in addition poor corrosion resistance, uses the longevity Order the longest.

Utility model content

The technical problems to be solved in the utility model:

Now power cable armouring many employings metal tape is wrapped or tinsel dredge around structure, the wrapped cable of metal tape is hard Degree is big, and Cable Bending Radius is big, if the bevelling that metal tape avris is jagged, sharp, easily pierces through sheath or insulation during bending, Cause cable fault.The Cable Bending Radius that tinsel is dredged around armouring is big, and when bending radius is too small, tinsel easily plays torsion, and Radially protective capability is poor, is easily damaged by external force.

The technical scheme used for solving technical problem:

For solving prior art problem, the technical program proposes a kind of lock armo power cable, many metal monofilament structures The conductor become, is coated with conductor shielding, insulation, insulation shielding composition core at conductor；Metallic shield it is distributed, gold outside core It is stranded that core after genus shielding can carry out stranding, carries out metal tape lock armo, be extruded with outside metal armouring outside metallic shield Restrictive coating.By this programme, solve the problem that Cable Bending Radius is big；The problem that cable armouring stretching resistance is little.Specific as follows:

A kind of lock armo medium-pressure power cable, its structure is: constituted conductor by many metal monofilament are stranded；Outside conductor From-inner-to-outer wraps up semiconductive shielding layer, insulating barrier and insulation screen successively and constitutes core；Core is coated with metallic shield Layer；Loop core is constituted by return conductors outer wrapping insulating barrier；Three cores being surrounded by metal screen layer and three loop cores It is spaced adjacent the most successively, becomes axial symmetry stranded composition cable core；

Wrapped belt it is surrounded with outside cable core；Tightly packed in cable core have Insulation Material；It is extruded with inner liner outside wrapped belt； Inner liner is externally provided with the lock armo layer that metal tape is constituted；One layer of sheath is extruded outside lock armo layer；Metal tape width and interlocking The concerns mandate of armor internal diameter such as table 1:

Table 1

Further, the material of described conductor is copper, aluminum or aluminum alloy；Conductor is regular stranded mode, the stranded joint of outermost layer Footpath ratio no more than 16；Outermost layer direction of lay is left-hand.

Further, the material of described semiconductive shielding layer is semiconductive sizing material, and the thinnest point thickness of semiconductive shielding layer is 0.6mm；The Insulation Material of described insulating barrier be EP rubbers be the insulation compound of base material；The thickness range of insulating barrier be 2.16～ 11.4mm；Semiconductive shieldin material and Insulation Material is extruded on conductor.

Further, the material of described insulation screen is semiconductive sizing material, and the thinnest point thickness of insulation screen is 1.6mm。

Further, described metal screen layer is made up of tinsel or metal tape；The metal screen layer that tinsel is constituted It is to dredge around copper wire outside insulating barrier；Copper wire dredge around adjacent copper wire gap be not more than 4mm, dredging is dextrad around direction, and adjacent Space between sub-thread copper wire can not accommodate the single copper wire that next root is identical；The metal screen layer that metal tape is constituted is in insulation The outer wrapped copper strips of layer；The rate of putting up of copper strips is not less than 15%.

Further, the material of described inner liner is around pouch-type polypropylene tape, polypropylene tape nominal thickness 0.3mm.

Further, the metal tape of described armor is to use aluminum alloy strip or steel band lock armo；Armouring mode be S type or Z-type.

Further, the thickness of sheath is:

Sheath extrudes front a diameter of 0～17.78mm, then sheath minimum thickness is 1.4mm；

Sheath extrudes front a diameter of 17.78～38.10mm, then sheath minimum thickness is 1.78mm；

Sheath extrudes front a diameter of 38.10-63.50mm, then sheath minimum thickness is 2.54mm；

Sheath extrudes front a diameter of ＞ 63.50mm, then sheath minimum thickness is 3.17mm.

Beneficial effect

Lock armo cable uses interior interlocking technique to complete the armouring of strap layer, is different from traditional wrapped side completely Formula, the interlock between layers of lock armo cable, it is ensured that cable is amenable to extraneous powerful destructive power, even if cable When suffering bigger pressure and impulsive force, cable is also difficult to breakdown, improves security performance.Relative to steel band around pouch-type armour Dress, the advantage of lock armo is not only can bear radial pressure, more can bear certain axial tension, and its bending radius is the least In steel band around pouch-type armored cable, it is lightweight, lays facility, can exempt from crane span structure and install, can reduce the installation fee of 20%～40% With.

Accompanying drawing explanation

Fig. 1 is the radial section structural representation of this cable；

Fig. 2 is the lock armo layer axial sectional diagrammatical view illustration of this cable；

In figure, conductor 1, semiconductive shielding layer 2, insulating barrier 3, insulation screen 4, metal screen layer 5, return conductors 6, interior Lining 7, lock armo layer 8, sheath 9.

Detailed description of the invention

Such as Fig. 1, a kind of lock armo medium-pressure power cable of this example, its structure is: constituted by many metal monofilament are stranded Conductor；Wrap up semiconductive shielding layer, insulating barrier and insulation screen successively at the outer from-inner-to-outer of conductor and constitute core；Core outsourcing It is covered with metal screen layer；Loop core is constituted by return conductors outer wrapping insulating barrier；Three cores being surrounded by metal screen layer with Three loop cores are spaced adjacent the most successively, become axial symmetry stranded composition cable core；Wrapped belt it is surrounded with outside cable core；In cable core Tightly packed have Insulation Material；It is extruded with inner liner outside wrapped belt；Inner liner is externally provided with the lock armo layer that metal tape is constituted； One layer of sheath is extruded outside lock armo layer；Metal tape width and the concerns mandate such as table 1 of lock armo layer internal diameter:

Table 1

The material of described conductor is copper, aluminum or aluminum alloy；Conductor is regular stranded mode, and the stranded lay ratio of outermost layer is little In 16；Outermost layer direction of lay is left-hand.

The material of described semiconductive shielding layer is semiconductive sizing material, and the thinnest point thickness of semiconductive shielding layer is 0.6mm；Institute State the Insulation Material of insulating barrier be EP rubbers be the insulation compound of base material；The thickness range of insulating barrier is 2.16～11.4mm；Lead Semiconductive shieldin material and Insulation Material is extruded on body.

The material of described insulation screen is semiconductive sizing material, and the thinnest point thickness of insulation screen is 1.6mm.

Described metal screen layer is made up of tinsel or metal tape；The metal screen layer that tinsel is constituted is in insulation Layer is outer to be dredged around copper wire；Copper wire dredge around adjacent copper wire gap be not more than 4mm, dredging is dextrad around direction, and adjacent sub-thread copper wire Between space can not accommodate the single copper wire that next root is identical；The metal screen layer that metal tape is constituted is outer wrapped at insulating barrier Copper strips；The rate of putting up of copper strips is not less than 15%.

The material of described inner liner is around pouch-type polypropylene tape, polypropylene tape nominal thickness 0.3mm.

The metal tape of described armor is to use aluminum alloy strip or steel band lock armo；Armouring mode is S type or Z-type.

The thickness of sheath is:

Sheath extrudes front a diameter of 0～17.78mm, then sheath minimum thickness is 1.4mm；

Sheath extrudes front a diameter of 17.78～38.10mm, then sheath minimum thickness is 1.78mm；

Sheath extrudes front a diameter of 38.10-63.50mm, then sheath minimum thickness is 2.54mm；

Sheath extrudes front a diameter of ＞ 63.50mm, then sheath minimum thickness is 3.17mm.

Cable core avris places 3 loop cores.

One layer of inner liner of cable core outer cladding.

Claims (8)

1. a lock armo medium-pressure power cable, is characterized in that structure is:

Conductor is constituted by many metal monofilament are stranded；The outer from-inner-to-outer of conductor wrap up successively semiconductive shielding layer, insulating barrier and Insulation screen constitutes core；Core is coated with metal screen layer；

Loop core is constituted by return conductors outer wrapping insulating barrier；

Three cores being surrounded by metal screen layer and three loop cores are spaced adjacent the most successively, become axial symmetry stranded composition cable Core；

Wrapped belt it is surrounded with outside cable core；Tightly packed in cable core have Insulation Material；It is extruded with inner liner outside wrapped belt；Liner Layer is externally provided with the lock armo layer that metal tape is constituted；One layer of sheath is extruded outside lock armo layer；Metal tape width and lock armo The concerns mandate of layer internal diameter is:

The most according to claim 1, a kind of lock armo medium-pressure power cable, is characterized in that the material of described conductor is copper, aluminum Or aluminium alloy；Conductor is regular stranded mode, and the stranded lay ratio of outermost layer is not more than 16；Outermost layer direction of lay is left-hand.

The most according to claim 1, a kind of lock armo medium-pressure power cable, is characterized in that the material of described semiconductive shielding layer Matter is semiconductive sizing material, and the thinnest point thickness of semiconductive shielding layer is 0.6mm；

The Insulation Material of described insulating barrier be EP rubbers be the insulation compound of base material；The thickness range of insulating barrier be 2.16～ 11.4mm；

Semiconductive shieldin material and Insulation Material is extruded on conductor.

The most according to claim 1, a kind of lock armo medium-pressure power cable, is characterized in that the material of described insulation screen Being semiconductive sizing material, the thinnest point thickness of insulation screen is 1.6mm.

The most according to claim 1, a kind of lock armo medium-pressure power cable, is characterized in that described metal screen layer is by gold Genus silk or metal tape are constituted；

The metal screen layer that tinsel is constituted is to dredge around copper wire outside insulating barrier；Copper wire dredge around adjacent copper wire gap be not more than 4mm, dredging around direction is dextrad, and the space between adjacent sub-thread copper wire can not accommodate the single copper wire that next root is identical；

The metal screen layer that metal tape is constituted is at the outer wrapped copper strips of insulating barrier；The rate of putting up of copper strips is not less than 15%.

A kind of lock armo medium-pressure power cable, it is characterized in that the material of described inner liner be around Pouch-type polypropylene tape, polypropylene tape nominal thickness 0.3mm.

The most according to claim 1, a kind of lock armo medium-pressure power cable, is characterized in that the metal tape of described armor is Use aluminum alloy strip or steel band lock armo；Armouring mode is S type or Z-type.

The most according to claim 1, a kind of lock armo medium-pressure power cable, is characterized in that the thickness of sheath is:

Sheath extrudes front a diameter of 0～17.78mm, then sheath minimum thickness is 1.4mm；

Sheath extrudes front a diameter of 17.78～38.10mm, then sheath minimum thickness is 1.78mm；

Sheath extrudes front a diameter of 38.10-63.50mm, then sheath minimum thickness is 2.54mm；

Sheath extrudes front a diameter of ＞ 63.50mm, then sheath minimum thickness is 3.17mm.