CN202142315U

CN202142315U - Low-capacitance shielding control electric cable

Info

Publication number: CN202142315U
Application number: CN201120273759U
Authority: CN
Inventors: 杨海深; 乔家鑫; 宋亚红
Original assignee: TANGSHAN HAIFENG CABLE CO Ltd
Current assignee: TANGSHAN HAIFENG CABLE CO Ltd
Priority date: 2011-07-30
Filing date: 2011-07-30
Publication date: 2012-02-08
Anticipated expiration: 2021-07-30

Abstract

The utility model relates to a control electric cable, specifically a low-capacitance shielding control electric cable, comprising an insulating wire core, a cable core formed by the insulating wire core, a shielding layer and an outer protection sleeve; the insulating wire core is composed of an conductor and a polyethylene or foamed polyethylene insulating layer having a low dielectric constant epsilon covered on the outside of the conductor; the outside of the cable core formed by the insulating wire core is wrapped by a non-woven fabric wrapping belt. The non-woven fabric wrapping belt is wrapped by a copper wire knitted shielding layer; and the copper wire knitted shielding layer is covered by an extruded plastic outer protection sleeve. The utility model has simple structure and convenient manufacture, the capacitance is greatly decreased, so as to decrease the power storage capacity of the electric cable during power failure; the adverse impact to the outside world caused by the electric arc because of electric discharging is avoided; the safety performance of the electric cable is improved greatly.

Description

Low electric capacity shielding control cable

Technical field:

The utility model relates to control cable, specifically is a kind of low electric capacity shielding control cable.

Background technology:

According to the regulation among the standard GB/T9330-2008, control cable has only been done specific requirement to shielding, and the shielding form is: the shielding of aluminium polyester film, copper strips shielding and copper wire braid shielded.And the electric capacity aspect is not had specific requirement, when the electric capacity that requires control cable is very low, adopt which kind of insulating material and how to be provided with insulating barrier just do not have relevant criterion can according to.

The utility model content:

The utility model provides a kind of low electric capacity simple in structure, that can satisfy the electric capacity requirement to shield control cable to there being the shielding control cable of low electric capacity requirement not have the problem that relevant criterion can be complied with.

The technical scheme that the said problem that solves the utility model adopts is: a kind of low electric capacity shielding control cable; The cable core, screen, the oversheath that comprise insulated wire cores, constitute by insulated wire cores; Said insulated wire cores is made up of polyethylene or the polyethylene foamed insulating barrier of the low-k ε of conductor and conductor outer wrap, and the cable core outside that is made up of said insulated wire cores is surrounded with the nonwoven fabrics twining package tape.

Said nonwoven fabrics twining package tape outside is surrounded with the copper wire woven shield, and said copper wire woven shield outside is extruded with extrusion type plastics oversheath.

Compared with prior art; The beneficial effect of the utility model is: relatively simple for structure; Easily manufactured, reduce electric capacity to a great extent, thereby reduced the charge storage ability of cable when outage; Reduced the harmful effect that is caused to external world because of the electric arc that produced of discharge, the fail safe of cable is greatly improved.

Description of drawings:

Fig. 1 is the utility model embodiment cross section structure sketch map.

Among the figure: conductor 1, insulating barrier 2, twining package tape 3, screen 4, oversheath 5.

Embodiment:

Below in conjunction with embodiment the utility model is described further.

Referring to Fig. 1, the structure of the conductor 1 of this cable can be carried out according to requirement of client.Conductor 1 skin is enclosed with the polyethylene of low-k ε or the insulating barrier 2 of polyethylene foamed material, and this insulating barrier 2 is the main member of low electric capacity, and its thickness need require concrete calculating according to client's electric capacity.Constitute insulated wire cores by conductor 1 and insulating barrier 2, three insulated cores are formed cable core, and the cable core outside is surrounded with nonwoven fabrics twining package tape 3, and twining package tape 3 should be thicker as far as possible, and is thick like 0.2mm.Twining package tape 3 outsides are surrounded with the screen 4 that is made up of copper wire braid, and these screen 4 outsides are extruded with extrusion type plastics oversheath 5.

The utility model has satisfied the requirement of low electric capacity to greatest extent under the prerequisite that satisfies the shielding standard, avoided cable in use, the accident that causes discharge to cause greatly because of itself electric capacity.

Claims

1. one kind low electric capacity shields control cable; The cable core, screen, the oversheath that comprise insulated wire cores, constitute by insulated wire cores; It is characterized in that; Said insulated wire cores is made up of polyethylene or the polyethylene foamed insulating barrier of the low-k ε of conductor and conductor outer wrap, and the cable core outside that is made up of said insulated wire cores is surrounded with the nonwoven fabrics twining package tape.

2. low electric capacity shielding control cable according to claim 1 is characterized in that said nonwoven fabrics twining package tape outside is surrounded with the copper wire woven shield, and said copper wire woven shield outside is extruded with extrusion type plastics oversheath.