CN204740877U - Novel direct current pulse cable - Google Patents

Abstract

The utility model provides a novel direct current pulse cable, belongs to cable technical field. The cable core is by the conductor, arrange that the conductor is outer to be constituted around package semi -conductive layer and composite insulation layer in in proper order, and the insulating layer is by adopting the insulating material of antistatic lotus accumulation once -through type EP rubbers to make, composite insulation layer is equipped with semiconduction buffering lacing, concentric conductor layer, non -woven fabrics band layer outward in proper order, and the crowded package of oversheath is outside non -woven fabrics band layer. The utility model discloses the low -impedance characteristic of the low decay of high -pressure high frequency of cable can satisfy the characteristic of high voltage direct current pulse completely to maximumly reduce the circuit decay, satisfied the designing requirement of laying in narrow and small space simultaneously.

Description

A kind of Novel DC pulse cable

Technical field

The utility model relates to a kind of structure of cable, and especially a kind of structure of Novel DC pulse cable, belongs to field of cable technology.

Background technology

Along with the needs of China's industrial or agricultural, science and military industry development, DC pulse technology is widely used in the numerous areas such as radar, radionavigation, observing and controlling, electronic computer.In addition at atomic energy industry plasma physics, in accelerator art, also widely apply high-voltage pulse technology.Current PRF technology, to high pressure, burst pulse, momentary high power future development, it is also proposed the requirement of the aspects such as high pressure resistant, low decay, Low ESR, high shielding to high voltage pulse cable.For the pulse signal Lossless transport that pulse generator is produced is to various load, needs the cable using special construction design, thus meet the property requirement of line transmission.

Utility model content

The purpose of this utility model is for above-mentioned the deficiencies in the prior art, develops the Novel DC pulse cable with high pressure resistant, low decay, Low ESR, high shielding properties.

The purpose of this utility model is achieved through the following technical solutions: a kind of Novel DC pulse cable, comprise cable core and oversheath, it is characterized in that, described cable core is placed in wrapped semi-conductive layer outside conductor and composite insulation layer is formed by conductor, successively, described composite insulation layer is made up of conductor shield, insulating barrier, insulation screen, and described insulating barrier is made by adopting antistatic lotus to accumulate once-through type ethylene propylene rubber insulation material; Described composite insulation layer is provided with semi-conductive buffer belt, concentric conductor layers, nonwoven fabrics belting layer outward successively, and described oversheath is extruded in outside nonwoven fabrics belting layer.

Described antistatic lotus accumulation once-through type ethylene propylene rubber insulation material is made by adding static charge accumulation inhibitor in the electrical ethylene-propylene rubber of height.

Described conductor is five class copper conductors.

Described jacket material is butyronitrile composite materials.

Described concentric conductor layers is made up of many annealing copper wire, copper strips, and many annealing copper wires are looped around outside semi-conductive buffer belt equably, and copper strips is wrapped and tighten outside many annealing copper wires, and forms an entirety with annealed copper silk.

Described conductor shield, insulating barrier, insulation screen adopt three-layer co-extruded shaping.

For realizing the exploitation of DC pulse cable of high pressure resistant, low decay, Low ESR, high shielding properties, carry out studying and shaping from structural design and Material selec-tion aspect:

1, the formula system of antistatic lotus accumulation type ethylene propylene rubber insulation material

Different from common crosslinked polyetylene insulated ac cable, this product is for adopting antistatic lotus accumulation type ethylene-propylene rubber, this Insulation Material for the addition of static charge accumulation inhibitor in the electrical ethylene-propylene rubber of common height, thus under ensureing the prerequisite that cable key property did not reduce as mechanical and physical performance, electrical strength, water tree resistant property and long-life etc., and be more suitable for the use occasion of DC electric field.

2, the design of insulation thickness and check under DC electric field

Determine the insulation thickness of different electric pressure and specification cable through a large amount of experiment and computations, to meet the design service life of cable, and do according to the thickness of use feedback data to insulation thickness of client and finally revise confirmation.

3, the design of direct current cables test model and foundation

Because this product work is in DC electric field, the distribution of itself and AC field also exists distinct mechanism, only can not simulate actual condition completely using the test method of regular alternating current cable as directive/guide, therefore establish DC electric field test model according to the test guidance of international conference on large HV electric systems.

In the utility model:

1) conductor: for ensureing the flexibility of cable, adopts the five class copper conductors meeting GB/T 3956 and specify.

2) insulate: adopt antistatic lotus to accumulate once-through type ethylene propylene rubber insulation material, this Insulation Material for the addition of static charge accumulation inhibitor in the electrical ethylene-propylene rubber of common height, thus under ensureing the prerequisite that cable key property did not reduce as mechanical and physical performance, electrical strength, water tree resistant property and long-life etc., and be more suitable for the use occasion of DC electric field.Compound inslation adopts conductor screen, insulation, the three-layer co-extruded processing technology of insulation shielding.

4) concentric conductor layers: the structural design of concentric conductor layers meets circuit electrical operation and requires and reduce the outside diameter of cable, makes the mounting and installation of cable become more easy; Equally distributed concentric conductor layers, also possesses excellent electromagnetism interference performance and anti-lightning performance simultaneously.

5) sheath: the flexibility ensureing whole cable, adopts and extrudes butyronitrile composite materials.

The utility model, by a large amount of calculating, design and experimental verification, determines the structure of cable: five class copper conductors chosen by cable, adopts antistatic lotus to accumulate once-through type ethylene propylene rubber insulation material, and adopts the structure of concentric conductor.By strict technology controlling and process, make the low-impedance characteristic of the low decay of the high voltagehigh frequency of cable can meet the characteristic of high-voltage dc pulse completely, and farthest reduce Line Attenuation, meet the designing requirement that small space lays simultaneously.

The low decay of the high voltagehigh frequency low-impedance KTX type DC pulse cable of the utility model development, meets the transmission requirement of high-voltage dc pulse circuit completely, and the cable product providing a kind of high-quality and safety for this type of power system customer ensures as operation.

Accompanying drawing explanation

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

In figure: 1 conductor, 2 wrapped semi-conductive layers, 3 conductor shields, 4 insulating barriers, 5 insulation screens, 6 semi-conductive buffer belts, 7 annealing copper wire, 8 nonwoven fabrics belting layers, 9 oversheaths, 10 copper strips.

Embodiment

A kind of Novel DC pulse cable, its cable core is placed in wrapped semi-conductive layer 2 outside conductor and composite insulation layer is formed by conductor 1, successively.Composite insulation layer is made up of conductor shield 3, insulating barrier 4, insulation screen 5, conductor shield 3, insulating barrier 4, insulation screen 5 adopt three-layer co-extruded shaping, insulating barrier is made by adopting antistatic lotus to accumulate once-through type ethylene propylene rubber insulation material, and antistatic lotus accumulation once-through type ethylene propylene rubber insulation material is made by with the addition of static charge accumulation inhibitor in the electrical ethylene-propylene rubber of height.

Composite insulation layer is provided with semi-conductive buffer belt 6, concentric conductor layers, nonwoven fabrics belting layer 8 outward successively, and oversheath 9 is extruded in outside nonwoven fabrics belting layer.

Conductor is five class copper conductors; Jacket material is butyronitrile composite materials; Concentric conductor layers is made up of many annealing copper wire 7, copper strips 10, and many annealing copper wires are looped around outside semi-conductive buffer belt equably, and copper strips is wrapped and tighten outside many annealing copper wires, and forms an entirety with annealed copper silk.

Innovative point of the present utility model is as follows:

1, adopt antistatic lotus to accumulate once-through type ethylene propylene rubber insulation material, ensure that cable key property is as performances such as mechanical and physical performance, electrical strength, water resistant tree and long-lives.Insulating material adopts conductor screen, insulation, the three-layer co-extruded processing technology of insulation shielding in the course of processing.

2, equally distributed concentric conductor layers structural design meets the requirement of circuit electrical operation and reduces the outside diameter of cable, also possesses excellent electromagnetism interference performance and anti-lightning performance simultaneously.

Claims (5)

1. a Novel DC pulse cable, comprise cable core and oversheath (9), it is characterized in that, described cable core is placed in wrapped semi-conductive layer (2) outside conductor and composite insulation layer is formed by conductor (1), successively, described composite insulation layer is made up of conductor shield (3), insulating barrier (4), insulation screen (5), described insulating barrier adopts antistatic lotus to accumulate once-through type ethylene propylene rubber insulation material and makes, and this Insulation Material is the electrical ethylene-propylene rubber of height that with the addition of static charge accumulation inhibitor; Described composite insulation layer is provided with semi-conductive buffer belt (6), concentric conductor layers, nonwoven fabrics belting layer (8) outward successively, and described oversheath is extruded in outside nonwoven fabrics belting layer.

2. a kind of Novel DC pulse cable according to claim 1, is characterized in that, described conductor is five class copper conductors.

3. a kind of Novel DC pulse cable according to claim 1, is characterized in that, described jacket material is butyronitrile composite materials.

4. a kind of Novel DC pulse cable according to claim 1, it is characterized in that, described concentric conductor layers is made up of many annealing copper wire (7), copper strips (10), many annealing copper wires are looped around outside semi-conductive buffer belt equably, copper strips is wrapped and tighten outside many annealing copper wires, and forms an entirety with annealed copper silk.

5. a kind of Novel DC pulse cable according to claim 1, is characterized in that, described conductor shield (3), insulating barrier (4), insulation screen (5) adopt three-layer co-extruded shaping.