CN203433855U - High-tensile vertical-laid waterproof high-power variable frequency cable - Google Patents

Abstract

The utility model provides a high-tensile vertical-laid waterproof high-power variable frequency cable, and belongs to the technical field of cables. The cable comprises a cable core and an outer sheath disposed on the cable core. The cable is characterized in that the cable core is formed by twisting three wire cores, the wire core is formed by co-extruding three layers of a conductor shielding layer, an insulating layer, an insulating shielding layer on a conductor which is stranded by continuous casting and rolling high-purity cathode copper annealing-with-pulling copper wires. The wire cores are provided with split-phase metal shielding layers formed by wire core wrapping tape layers and overlapping wrapping copper belts. The cable core is provided with a water-blocking expansion wrapping belt, and a main shielding layer, an isolating wrapping layer, a distance sleeve, and a double-layer steel wire armor layer formed by the overlapping wrapping copper belts. The outer sheath is extruded on the double-layer steel wire armor layer. The cable is more reasonable in structure, and more stable in performance, shielding performance of the cable and service life are improved, and the cable would not interfere other devices while the cable has relatively good anti-interference capability.

Description

High tensile vertical run water proof type high-power frequency conversion cable

Technical field

The utility model relates to a kind of structure of cable, and especially a kind of high tensile vertical run water proof type high-power frequency conversion cable, belongs to cable technology field.

Background technology

Along with scientific and technological progress, high-rise, high-rise building emerging in large numbers like the mushrooms after rain; Mine is constantly to the constantly skywards growth of end extension, high level that lands simultaneously, the continuous application of various powerful devices wherein, being connected between its frequency converter and frequency converter, between frequency converter and electrical network be just badly in need of using can meet take up an area space little, lay big-power transducer cable easily.

Utility model content

The purpose of this utility model is for above situation, by rigorous structural design and strict technology controlling and process, has developed properties of product and has met the high tensile vertical run water proof type high-power frequency conversion cable that normal throw is large, horizontal displacement is little.

The purpose of this utility model is achieved through the following technical solutions: high tensile vertical run water proof type high-power frequency conversion cable, comprise the oversheath arranging on cable core, cable core, it is characterized in that, described cable core by many cores, earth connection, the inserts that blocks water is stranded forms, described core is gone out conductor shield, insulating barrier, insulation screen and is formed by three-layer co-extruded on conductor, core is provided with core belting layer, the phase-splitting metal screen layer that on core belting layer, overlapping wrapped copper strips forms; Described cable core is provided with the expansion band that blocks water, the expansion band that blocks water is provided with total screen that overlapping wrapped copper strips forms, on total screen, be provided with successively isolation belting layer, separation sleeve, separation sleeve be provided with by the first wire armoring layer, first tighten belt, the second wire armoring layer, second is tightened the double wire armor layer that belt forms, and on double wire armor layer, extrudes oversheath.

Described conductor is moved back by continuous casting and rolling Cu-CATH-1 Lian Lalian that copper cash is stranded to be formed.

Described core, earth connection are three, are uniformly distributed.

The utility model is meeting under the defined terms such as product electric property, mechanical performance, compare with traditional frequency conversion device cable, more reasonable structure, performance are more stable, improve cable shield performance and used life, when cable has stronger antijamming capability, can not cause interference to other electric equipments.

Because this type of cable service condition is very more special, the design feature of this cable is to comprise phase-splitting metallic shield, total screen, a little less than making the antijamming capability of cable strong, disturbing the ability of other cables, guarantee that cable self is used safe and reliable while also having guaranteed that other cables that this cable lays are used safe time around.The conductor of cable with single line adopt " double end " big drawing machine to carry out wire drawing and annealing, environment-friendly type is zinc-plated, makes after wire drawing and annealing wire diameter and elongation comparatively unified, stable, has ensured the production of cable conductor with single line.Cable conductor adopts frame wire twisting equipment with twisted wire, Moving plate Setting-out Technique, and stepless speed regulation, product external diameter is even, and pitch is consistent, Stability Analysis of Structures.Large size conductor adopts 61 dish cage cablers regular stranded, and adopts sizing die strand conductor to carry out certain pressing and school circle, prevents strand wire jumper.

Conductor shield, insulating barrier, insulation screen adopt three-layer co-extruded technology, realize on-line measurement, and speed of production is fast, constant product quality, is the state-of-the-art cross-linking production line in the current world.A series of crosslinked parameters such as working temperature while being cross-linked according to insulation cross-linking properties, thickness of insulating layer and speed of production are definite, have guaranteed that insulation obtains full cross-linked, guarantee electric property and the mechanical performance of cable insulation.Advanced production equipment and strict technology controlling and process have guaranteed the uniformity of insulation and shielding, screen good concentricity, smooth surface rounding, the stability of production.The earth short circuit current of big-power transducer system is very large, and in order to guarantee the safe operation of system, the utility model adds earthing conductor technique while adopting stranding meets its requirement, and conductor adopts 2 classes to press circular lay configuration.This conductor has excellent bending radius and the feature such as volume is little, can when not affecting master core triangular structure, be added on conductor inside.

This cable is mainly used in high voltage, high-frequency and high-power vertical run occasion, and its electric field strength, magnetic field intensity are high.Thereby the electromagnetic interference producing is also extremely strong, in order to ensure this cable antijamming capability and reduce the Recombinant Interferon α-2b of this cable, its design is to adopt metallic shield structure.Metallic shield is mainly divided into phase-splitting metallic shield, always shields the characteristic of two parts to guarantee that high-power, the frequency converter of cable connects.First, phase-splitting shielding adopts copper strips overlapping wrapped, and the overlapping wrapped and copper strips by copper strips closely fits tightly with insulation shielding, can guarantee the electric field equilibrium of cable insulation.The key factor that affects middle high-pressure cable useful life is exactly whether the electric field of insulating barrier is balanced, if electric field harmony is poor, cable will produce the phenomenon of charge concentration in use procedure.Cumulative along with service time, its charge density also can sharply increase and finally causes cable breakdown damage.So insulating barrier electric field high, midium voltage cable must have harmony.Secondly, the three-phase electricity transmission adopting during high, middle piezoelectricity transmission, according to the requirement of three-phase electricity transmission, system need to comprise ground path, and phase-splitting shielding material is copper strips, can directly serve as earthing conductor and use when system is less demanding for earth short circuit current.Again, because being mainly used in big-power transducer, this cable connects, for preventing that this cable from adopting phase-splitting shielding as ground floor screen to its interference of cabling around, can effectively reduce the interference of this cable.Outside becoming cable core, overlapping wrapped copper strips is as total shielding.The part that total shielding employing copper strips can be used as system earth line is to guarantee the fail safe of system.Total shielding is as preventing that this cable from, to its second layer screen that cabling disturbs, can drop to minimum point by the jamming performance of this cable around.Other cables that this cable around lays also disturb this cable at running, the generation that adopts said structure effectively to avoid interference.

Reasonable in design, up-to-standard cable in use maximum hazardous substance is exactly water, once cable water inlet, the life-span of cable becomes geometric format to decline exactly.Even the water inlet of the cable of horizontal laying, water is also difficult to longitudinally spread.Once and the cable of vertical run water inlet, water can be because of Action of Gravity Field longitudinally spreading along cable rapidly.So the solution longitudinal water-blocking problem of the cable of vertical run is just extremely urgent.When adopting stranding, the utility model fills the block water structural design of zone of swelling of fillings that block water, the employing of stranding band, the characteristic expanding rapidly when running into water by the filling that blocks water, the zone of swelling that blocks water, the possible path that water is longitudinally spread along cable shuts to reach the object of longitudinal water-blocking.

Armature of cable form is mainly divided into metal tape armour, wire armouring and three kinds of forms of metallic sheath, and the main armouring of metal tape armour, metallic sheath is as radially protection.This cable because of system of laying be vertical run, its stress being radially subject to is less, negligible.And the effect of wire armouring improves cable tensile strength longitudinally just.Wire armouring is traditionally mainly the tight wrapped form of wire that adopts special diameter, but this cable application occasion is special, simple one deck armouring can not meet its requirement, so designed closely wrapped form of double-level-metal silk (double wire armor layer).By double-level-metal silk direction is closely wrapped, can increases greatly cable and bear endwise tensile strength, direction is wrapped simultaneously can make to produce between armour the loose landing that causes cable core that interlocking effect prevents armour.Sheath adopts the form that extrudes, and by reasonably arranging, regulates line speed and extrusion temperature, guarantees that the mechanical performance of sheath meets the requirement of cable lifting.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

In figure: block water inserts, 8 earth connections, 9 of 1 conductor, 2 conductor shields, 3 insulating barriers, 4 insulation screens, 5 core belting layers, 6 phase-splitting metal screen layers, 7 blocks water that expansion band, 10 total screens, 11 isolation belting layers, 12 separation sleeves, 13 first wire armoring layers, 14 first are tightened belt, 15 second wire armoring layers, 16 second are tightened belt, 17 oversheaths.

Embodiment

High tensile vertical run water proof type high-power frequency conversion cable, cable core by many cores, earth connection, the inserts that blocks water is stranded forms, core is moved back three-layer co-extrudedly on the stranded conductor forming 1 of copper cash to go out conductor shield 2, insulating barrier 3, insulation screen 4 and form by continuous casting and rolling Cu-CATH-1 Lian Lalian.In cable core space, be filled with the inserts 7 that blocks water, in cable core, be at least provided with an earth connection 8.Core is provided with core belting layer 5, the phase-splitting metal screen layer 6 that on core belting layer, overlapping wrapped copper strips forms.Core, earth connection are three, are uniformly distributed.

The expansion band 9 that blocks water that cable core is provided with, the expansion band that blocks water is provided with total screen 10 that overlapping wrapped copper strips forms, total screen is provided with isolation belting layer 11, isolation belting layer is provided with separation sleeve 12, separation sleeve be provided with by the first wire armoring layer 13, first tighten belt 14, the second wire armoring layer 15, second is tightened the double wire armor layer that belt 16 forms, and extrudes oversheath 17 on double wire armor layer.

Because cable is used, bear larger non-homogeneous stress, adopt general copper conductor performance requirement to meet.The utility model adopts continuous casting and rolling Cu-CATH-1 Lian Lalian to move back copper cash, controls basic physical and mechanical properties, to obtain good pliable and tough cable conductor.Because the external diameter that the difference strand of the different numbers of plies of cable conductor causes to the cross-point forming is bigger than normal, and irrational twisting pitch causes cable in long-term BENDING PROCESS, to occur that local single wire fracture punctures insulation and the whole phenomenon of rupture of conductor, for above situation, the strand that the utility model has changed strand and multiple twisted wire to and pitch, to obtain excellent bending resistance, simultaneously well by conductor diameter with more much smaller with equal-specification external diameter than routine.

Because service condition is harsh, cable for metallic shield have relatively high expectations and also higher for the requirement of cable metal shielding layer grounding short circuit current.In order to meet above-mentioned requirements, this cable employing phase-splitting metallic shield, the structure that metal always shields and earthing conductor combines.First, because the electric pressure of cable is higher.The distributing homogeneity that its high voltage environment is wanted for the Electric Field Distribution between cable conductor, insulation, metallic shield requires height very, in order to make its electric field even, this cable adopts phase-splitting metallic shield, by the good characteristic of metallic conduction performance, can guarantee that metal level is in idiostatic.The metallic shield of phase-splitting simultaneously, the total shielding of metal have shielding electromagnetic wave along the characteristic of cable radial propagation, can guarantee that cable conductor is in electric circumstance metastable, that seal, guarantees the safe and stable operation of conductor.Secondly, cable adopts ground core to supplement the less problem of earth short circuit current that sheet metal strip shields, and can guarantee the safe and stable operation of cable, frequency converter etc.

Through many correlation tests, verifying, when vertical run cable, only relying on cable clip attached cable is the safety and stability that is difficult to guarantee cable.So this cable adopts double wire armor, by armouring, increase the ability to bear of cable longitudinal pulling force, can guarantee the safety and stability of cable in vertical run process and in use procedure.Because double-layer wire is for oppositely wrapped, when being subject to longitudinal pulling force, can tightly lock to increase mutually the ability to bear of cable longitudinal pulling force.

Claims (3)

1. a high tensile vertical run water proof type high-power frequency conversion cable, comprise the oversheath arranging on cable core, cable core, it is characterized in that, described cable core by many cores, earth connection, the inserts that blocks water is stranded forms, described core is gone out conductor shield, insulating barrier, insulation screen and is formed by three-layer co-extruded on conductor, core is provided with core belting layer, the phase-splitting metal screen layer that on core belting layer, overlapping wrapped copper strips forms; Described cable core is provided with the expansion band that blocks water, the expansion band that blocks water is provided with total screen that overlapping wrapped copper strips forms, on total screen, be provided with successively isolation belting layer, separation sleeve, separation sleeve be provided with by the first wire armoring layer, first tighten belt, the second wire armoring layer, second is tightened the double wire armor layer that belt forms, and on double wire armor layer, extrudes oversheath.

2. high tensile vertical run water proof type high-power frequency conversion cable according to claim 1, is characterized in that, described conductor is moved back by continuous casting and rolling Cu-CATH-1 Lian Lalian that copper cash is stranded to be formed.

3. high tensile vertical run water proof type high-power frequency conversion cable according to claim 1, is characterized in that, described core, earth connection are three, are uniformly distributed.

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