CN213241981U

CN213241981U - Flexible direct-current high-voltage coaxial cable

Info

Publication number: CN213241981U
Application number: CN202022396510.9U
Authority: CN
Inventors: 张乒; 周智浩; 刘辉; 段新建; 陈强
Original assignee: Shanghai Qifan Wire And Cable Technology Co Ltd
Current assignee: Shanghai Qifan Wire And Cable Technology Co Ltd
Priority date: 2020-10-24
Filing date: 2020-10-24
Publication date: 2021-05-18
Anticipated expiration: 2030-10-24

Abstract

The utility model relates to a flexible direct current high voltage coaxial cable relates to the technical field of cable, including the flexible support core of filling, the flexible support core of filling includes core and thermosetting insulating sleeve, the core includes the string that stranded setting, arbitrary the string all includes aramid fiber and thermosetting material body, arbitrary the equal crowded package of thermosetting material body is shaping outside aramid fiber, thermosetting insulating sleeve is crowded package outside thermosetting material body; the flexible supporting filler core is sequentially coated with a bendable inner conductor, an insulating layer, an outer conductor and a sheath. The application has the advantages of good bendability, reliability and durability.

Description

Flexible direct-current high-voltage coaxial cable

Technical Field

The application relates to the technical field of cables, in particular to a flexible direct-current high-voltage coaxial cable.

Background

Coaxial cables have wide application in the areas of cable television, networking, testing and measurement, radar and navigation, satellite television and many other high frequency transmission infrastructures. The high-voltage pulse technology is widely applied to the atomic energy industry plasma physics and the accelerator technology, in order to transmit the pulse generated by a pulse generator to various equipment loads, the middle of the high-voltage pulse technology is connected by a cable, and a coaxial cable is a cable specially used for transmitting various pulses.

In the related art, a high-voltage pulse coaxial cable includes an inner conductor, an inner semiconductive shielding layer, a composite insulating layer, an outer semiconductive shielding layer, an outer conductor layer, and a composite sheath layer. The inner semi-conductive shielding layer, the composite insulating layer, the outer semi-conductive different shielding layer, the outer conductor layer and the composite sheath layer are sequentially coated from inside to outside from the inner conductor.

With respect to the related art in the above, the inventors have considered that the bendability of the inner conductor is not good, and there is a point to be improved.

SUMMERY OF THE UTILITY MODEL

In order to improve the flexibility of coaxial cable, this application provides a flexible direct current high voltage coaxial cable.

The application provides a flexible direct current high voltage coaxial cable adopts following technical scheme:

a flexible direct-current high-voltage coaxial cable comprises a flexible supporting filler, wherein the flexible supporting filler comprises a core body and a thermosetting insulating sleeve, the core body comprises a plurality of strands of thin ropes, the plurality of strands of thin ropes are twisted, any one of the thin ropes comprises aramid fiber and a thermosetting material body, any one of the thermosetting material bodies is extruded and formed outside the aramid fiber, and the thermosetting insulating sleeve is extruded and formed outside the thermosetting material body; the flexible supporting filler core is sequentially coated with a bendable inner conductor, an insulating layer, an outer conductor and a sheath.

Through adopting above-mentioned technical scheme, aramid fiber has performances such as high strength, texture softness, therefore the string has the bendability of preferred, still has higher tensile strength simultaneously, establishes thermosetting insulation support at the outside cover of core, has improved the tensile strength that the core was filled in flexible support.

Optionally, a field intensity homogenizing shielding layer is fixed inside and outside the insulating layer.

Through adopting above-mentioned technical scheme, when the voltage that inner conductor and outer conductor let in is higher, because the table of inner conductor and outer conductor becomes not absolute smooth, the field intensity on inner conductor and outer conductor surface can distribute unevenly, local field intensity is too high can puncture the air gap and lead to the insulating layer to damage, field intensity homogenization shielding layer plays the effect of field intensity between homogenization insulating layer and inner conductor and the outer conductor, reduce the condition that the insulating layer is punctured, make the cable can tolerate higher voltage, and reduced the condition that the field intensity that produces in the cable produced the influence to electronic equipment on every side.

Optionally, the inner conductor comprises a braided layer of soft copper wire.

Through adopting above-mentioned technical scheme, the inner conductor adopts the soft copper wire weaving layer, and the soft copper wire has better bendability, and consequently, the flexible performance of the soft copper wire weaving layer of making is also better.

Optionally, the insulating layer comprises a thermoset cross-linked polyethylene layer.

By adopting the technical scheme, the thermosetting cross-linked polyethylene layer has the characteristics of low dielectric constant, high volume resistivity, low impedance and no moisture absorption, wherein the surface of the insulating layer is not easy to accumulate charges due to the characteristic of low dielectric constant, and the occurrence of breakdown accidents is reduced.

Optionally, the outer conductor includes a braided layer of soft copper wire.

Through adopting above-mentioned technical scheme, the layer structure that the soft copper wire was woven can the bending nature better, and the soft copper wire weaving layer is being guaranteed to improve the bending nature of outer conductor together with the flexible support core under the prerequisite of outer conductor electrical conductivity.

Optionally, the sheath is a butyronitrile polyvinyl chloride sheath.

Through adopting above-mentioned technical scheme, because butyronitrile polyvinyl chloride has better bendability and wearability, when butyronitrile polyvinyl chloride sheath protected the cable, improved the bendability and the durability of cable.

Optionally, the jacket comprises a composite jacket of a multilayer structure.

By adopting the technical scheme, compared with a single-layer sheath, the composite sheath is compounded with various materials, so that the sheath has more excellent performance.

Optionally, the composite sheath is sequentially compounded with an outer insulating layer, a flame retardant layer and a butyronitrile polyvinyl chloride layer from inside to outside.

By adopting the technical scheme, the outer insulating layer, the flame-retardant layer and the butyronitrile polyvinyl chloride layer form the outer sleeve, and the outer sleeve has good flexibility and good insulating and flame-retardant functions.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the aramid fiber has the properties of high strength, soft texture and the like, so that the string has better flexibility and higher tensile strength, and the thermosetting insulating sleeve sleeved outside the core body improves the tensile strength of the flexible supporting filler;

2. the inner conductor and the outer conductor are soft copper wire braided layers, so that the conductive cable has good conductive performance and good flexibility;

3. the field intensity homogenizing shielding layer plays a role in homogenizing field intensity between the insulating layer and the inner conductor and between the insulating layer and the outer conductor, the breakdown condition of the insulating layer is reduced, the cable can bear higher voltage, and the condition that the field intensity generated in the cable influences surrounding electronic equipment is reduced.

4. The sheath adopts butyronitrile polyvinyl chloride sheath, has better wearability, has improved the durability of cable.

Drawings

FIG. 1 is a schematic view of an embodiment of a flexible DC high-voltage coaxial cable;

FIG. 2 is a schematic view of an embodiment for embodying the string structure;

FIG. 3 is a schematic view of the second embodiment, which is mainly used for embodying the structure of the composite sheath.

Reference numerals: 1. a flexible support core; 11. a core body; 111. a string; 1111. aramid fibers; 1112. a body of a thermosetting material; 12. a thermoset insulating sleeve; 2. an inner conductor; 3. a field intensity homogenization shielding layer; 4. an insulating layer; 5. An outer conductor; 6. a sheath; 61. an outer insulating layer; 62. a flame retardant layer; 63. a butyronitrile polyvinyl chloride layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

Example 1

The embodiment of the application discloses a flexible direct current high voltage coaxial cable. Referring to fig. 1 and 2, the flexible supporting filler 1 includes a core 11 and a thermosetting insulation sleeve 12, the core 11 includes a plurality of strands of twisted strings 111, each strand of string 111 includes an aramid fiber 1111 and a thermosetting material 1112, the thermosetting material 1112 may be made of cross-linked polyethylene or ethylene propylene rubber, in this embodiment, the cross-linked polyethylene is made of cross-linked polyethylene, and the thermosetting material 1112 is formed outside the aramid fiber 1111 by an extrusion coating process. The thermoset insulating sleeve 12 is extruded over the thermoset material body 1112. The flexible supporting filler 1 is coated with an inner conductor 2 with flexibility, an insulating layer 4, an outer conductor 5 and a sheath 6 in sequence. The inside and outside both sides of insulating layer 4 cladding have field intensity homogenization shielding layer 3, and string 111 has fine bendability and tensile strength, and the thermosetting insulation support 12 of the outside of core 11 has further improved the tensile strength of flexible support filler 1.

Referring to fig. 1, the inner conductor 2 includes a braided layer of soft copper wire, and the inner conductor 2 is a layer structure formed by braiding soft copper wire on the outer side of the flexible supporting filler 1.

Homogenization field intensity shielding layer 3 is the composite bed, homogenization field intensity shielding layer 3 is by the semi-conductive plastics with around the semi-conductive belt complex that the package is located semi-conductive plastics week side and forms the layer structure, homogenization field intensity shielding layer 3 has semi-conductive characteristic, not only can the homogenization field intensity, still make the air gap between inner conductor 2 and insulating layer 4, the air gap between outer conductor 5 and insulating layer 4 does not bear voltage, the condition that the air gap between inner conductor 2, outer conductor 5 and insulating layer 4 was punctured and damaged insulating layer 4 has been reduced.

The insulating layer 4 comprises a thermosetting crosslinked polyethylene layer comprising a layer structure made by extrusion molding of a thermosetting crosslinked polyethylene material. The thermosetting crosslinked polyethylene layer is extruded on the outer side of the homogenized field intensity shielding layer 3 on the outer side of the inner conductor 2, the thermosetting crosslinked polyethylene has good insulating property and higher breakdown field intensity, and the reliability of the flexible direct-current high-voltage coaxial cable is improved.

The outer conductor 5 likewise comprises a braided layer of soft copper wire, the outer conductor 5 being braided on the homogenized field strength shield 3 outside the insulating layer 4. The sheath 6 includes the layer structure of being made by butyronitrile polyvinyl chloride or thermoplastic elastomer material, and 6 adoption butyronitrile polyvinyl chloride sheaths of sheath in this embodiment, and butyronitrile polyvinyl chloride sheaths are made by butyronitrile polyvinyl chloride material, and 6 adoption crowded package modes of sheath are formed in the outside of outer conductor 5, and butyronitrile polyvinyl chloride has better wear resistance, has improved the durability of flexible direct current high voltage coaxial cable.

The implementation principle of the embodiment 1 is as follows: when the flexible direct-current high-voltage coaxial cable is produced, workers firstly extrude the crosslinked polyethylene 1112 and form the thin ropes 111 outside the aramid fiber 1111, then a plurality of the thin ropes 111 are twisted into the core body 11, and the core body 11 is coated with the thermosetting insulating sleeve 12 to form the flexible supporting filler 1. Then the staff wraps the inner conductor 2, the homogenized field intensity shielding layer 3, the insulating layer 4, the homogenized field intensity shielding layer 3, the outer conductor 5 and the sheath 6 outside the flexible supporting filler 1 in sequence.

Example 2

Referring to fig. 3, embodiment 2 differs from embodiment 1 in that: the sheath 6 includes multilayer structure's composite sheath, and composite sheath from interior to exterior includes external insulation layer 61, fire-retardant layer 62 and butyronitrile polyvinyl chloride layer 63 in proper order, and external insulation layer 61 includes the dacron resin layer in this embodiment, and the dacron resin layer adopts the mode cladding of extrusion molding to set up on outer conductor 5, and the dacron resin layer has better bendability and good insulating properties. The flame retardant layer 62 includes a halogen-containing polymer layer, which is coated on the outer insulating layer by extrusion molding, and the halogen-containing polymer layer has good flame retardant property. Butyronitrile polyvinyl chloride layer 63 adopts the extrusion molding mode to form on fire-retardant layer, and butyronitrile polyvinyl chloride layer 63 has good bendability and wearability.

The implementation principle of the embodiment 2 is as follows: compared with a single-layer sheath, the composite sheath is formed by compounding the outer insulating layer 61, the flame-retardant layer 62 and the butyronitrile polyvinyl chloride layer 63, has better insulating, flame-retardant and wear-resistant effects, and improves the safety and durability of the flexible direct-current high-voltage coaxial cable.

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

1. The utility model provides a flexible direct current high voltage coaxial cable which characterized in that: the flexible supporting filler core (1) comprises a core body (11) and a thermosetting insulating sleeve (12), wherein the core body (11) comprises a plurality of strands of twisted strings (111), each string (111) comprises aramid fibers (1111) and a thermosetting material body (1112), each thermosetting material body (1112) is extruded and formed outside the aramid fibers (1111), and the thermosetting insulating sleeve (12) is sheathed outside the core body (11); the flexible supporting filler core (1) is sequentially coated with a bendable inner conductor (2), an insulating layer (4), an outer conductor (5) and a sheath (6).

2. A flexible dc high voltage coaxial cable according to claim 1, wherein: the field intensity homogenizing shielding layer (3) is fixed inside and outside the insulating layer (4).

3. A flexible dc high voltage coaxial cable according to claim 1, wherein: the inner conductor (2) comprises a soft copper wire braided layer.

4. A flexible dc high voltage coaxial cable according to claim 1, wherein: the insulating layer (4) comprises a thermosetting cross-linked polyethylene layer.

5. A flexible dc high voltage coaxial cable according to claim 1, wherein: the outer conductor (5) comprises a soft copper wire braided layer.

6. A flexible dc high voltage coaxial cable according to claim 1, wherein: the sheath (6) comprises a butyronitrile polyvinyl chloride sheath.

7. A flexible dc high voltage coaxial cable according to claim 1, wherein: the jacket (6) comprises a composite jacket of a multilayer structure.

8. A flexible dc high voltage coaxial cable according to claim 7, wherein: the composite sheath is sequentially compounded with an outer insulating layer (61), a flame-retardant layer (62) and a butyronitrile polyvinyl chloride layer (63) from inside to outside.