CN2427893Y

CN2427893Y - Full sealing type radio-frequency coaxial cable

Info

Publication number: CN2427893Y
Application number: CN 00233385
Authority: CN
Inventors: 陆加明; 孙强熙
Original assignee: Tianyi Network Science & Tech
Current assignee: Tianyi Network Science & Tech
Priority date: 2000-05-19
Filing date: 2000-05-19
Publication date: 2001-04-25
Anticipated expiration: 2010-05-19

Abstract

The utility model relates to a full sealing type radio-frequency coaxial cable which belongs to a new coaxial cable for an access network of broadband communication. The utility model has an inner conductor, an insulation layer, an outer conductor and a sheath. The insulation layer is a high-voltage physical and high-foaming polyethylene layer, the inner part of the insulation layer is provided with a solid endodermis layer, and the outer part of the insulation layer is provided with a solid exodermis layer. The solid endodermis layer is adhesively bonded with the inner conductor and the polyethylene foaming layer, the solid exodermis layer is adhesively bonded with the outer conductor and the polyethylene foaming layer, and a gap of the outer conductor and the sheath is filled with coating composites or anti-corrosion materials. The water and the moisture air can be prevented from entering or immersing the utility model when the utility model is used; so the rustiness of the inner conductor and the outer conductor are avoided, the stable performance of the cable is maintained, and the requirement of the access network of the broadband communication can be satisfied.

Description

The full seal type radio frequency coaxial-cable

What the utility model was related is a kind of full sealed type radio frequency coaxial-cable, and it is the novel coaxial cable that adopts in the broadband connections Access Network.

The present communications industry, the service cable of broadband connections Access Network and distribution cable, the cable of use are that low pressure is filled nitrogen high temp physically foamed pe insulation radio frequency coaxial-cable.The insulating barrier resistance to compression of this cable is poor, and the perforate bubble is more, and insulation property are poor.Do not have the tack coat (see figure 3) between inner wire and the insulating barrier and between outer conductor and the insulating barrier, moisture and humid air are easy to move into, and cause inner wire or outer conductor corrosion.Have the space between outer conductor and the sheath simultaneously, moisture content and humid air equally also are easy to immerse, and cause the outer conductor corrosion.Insulation resistance descends when serious, can not satisfy the requirement of broadband connections Access Network.

The purpose of this utility model is to provide a kind of full sealed type radio frequency coaxial-cable, can prevent that moisture and humid air from moving into or immerse, avoid causing inner wire and outer conductor corrosion and insulation resistance to descend, keep cable performance stable, satisfy the requirement of broadband connections Access Network.

The purpose of this utility model is achieved in that a kind of full sealed type radio frequency coaxial-cable, and it has inner wire, insulating barrier, outer conductor and sheath, it is characterized in that insulating barrier is a high-pressure physics highly foaming polyethylene layer, the solid endodermis of one deck is arranged in it, the solid exodermis of one deck is arranged outside it.Solid endodermis and solid exodermis are to be made by binding type resin and low density polyethylene (LDPE) admixture.Solid endodermis and inner wire and polyethylene layer are bonding, and solid exodermis and outer conductor and polyethylene layer are bonding, and the space between outer conductor and the sheath is filled with and applies compound or preserver simultaneously.

Description of drawings;

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

Fig. 2 is the resolution chart of Fig. 1.

Fig. 3 is the prior art constructions schematic diagram.

In conjunction with the accompanying drawings concrete structure of the present utility model is illustrated;

A kind of full sealed type radio frequency coaxial-cable, it has inner wire 1, insulating barrier 3, outer conductor 5 and sheath 7, its insulating barrier 3 are a kind of high-pressure physics highly foaming polyethylene insulating barriers, and the solid endodermis 2 of one deck is arranged in the insulating barrier 3, and the solid exodermis 4 of one deck is arranged outside the insulating barrier 3.High-pressure physics highly foaming polyethylene insulating barrier 3 is by high density polyethylene (HDPE) (HDPE)+low density polyethylene (LDPE) (LDPE)+nucleator and nitrogen (N2), its high density polyethylene (HDPE)+low density polyethylene (LDPE)+nucleator adds feeding machine stirring back by certain prescription and injects the foam extruder, its nitrogen pressure that injects the foam extruder is generally more than 10Mpa, the temperature of extruder is at 175 ℃, foam bubble diameter after the moulding of foam extruder is not more than 0.05mm, and the foam uniform insulation is good.Solid endodermis 2 and solid exodermis 4 are to be made by the admixture of binding type resin and low density polyethylene (LDPE) (LDPE).Solid endodermis 2 is bonding with inner wire 1 and polyethylene layer, and solid exodermis 4 is bonding with outer conductor 5 and polyethylene layer, makes not seep water the inner sealing of coaxitron, and moisture content and humid air can not be moved into, and avoid the inner wire corrosion.Space between outer conductor 5 and the sheath 7 is filled with and applies composite layer 6 or preserver layer simultaneously, apply compound and adopt stable performance, and and PVC, the good material of PE sheath material compatibility is filled between outer conductor 5 and the sheath 7, prevent that moisture content and humid air from immersing, and avoids outer conductor 5 corrosions.Sheath 7 usefulness PVC or PE material are made.

Inner wire 1 is copper covered steel wire or copper-clad aluminum conductor and copper cash.

What the shielding material of outer conductor 5 generally adopted is the metal aluminum pipe; It is to weave one metal wire layer again outside vertical alclad is moulded the vertical bag of composite membrane that another kind adopts.Wire is an aluminum-alloy wire, bare copper wire or tinned copper wire.

Outer conductor 5 has three kinds of shielding forms: a kind of is standard shielded, and another kind is three layers of shielding, and another is four layers of shielding; Standard shielded is that vertical alclad is moulded composite membrane and woven one metal wire layer outward again; Three layers of shielding are vertical again bag one deck aluminum-plastic composite membranes on the basis of standard shielded; Four layers of shielding are to weave one metal wire layer on the basis of three layers of shielding again.

The utility model adopts full sealed type radio frequency coaxial-cable, can prevent that moisture and humid air from moving into or immerse, and avoids causing inner wire and outer conductor corrosion and insulation resistance to descend, and keeps cable performance stable, satisfies the requirement of broadband connections Access Network.

Claims

1, a kind of full seal type radio frequency coaxial-cable, it has inner wire, insulating barrier, outer conductor and sheath is characterized in that insulating barrier is a high-pressure physics highly foaming polyethylene layer, and solid endodermis is arranged in it, and solid exodermis is arranged outside it; Solid endodermis and inner wire and polyethylene layer are bonding, and solid exodermis and outer conductor and polyethylene layer are bonding, and the space between outer conductor and the sheath is filled with and applies compound or preserver simultaneously.

2, full seal type radio frequency coaxial-cable according to claim 1, its feature insulating barrier are the extrusion molding layers by high density polyethylene (HDPE)+low density polyethylene (LDPE)+nucleator and nitrogen.

3, full seal type radio frequency coaxial-cable according to claim 1, solid endodermis of its feature and solid exodermis are the admixtures of binding type resin and low density polyethylene (LDPE).

4, full seal type radio frequency coaxial-cable according to claim 1 all has polyethylene bonding between solid endodermis of its feature and the inner wire and between solid exodermis and the outer conductor.

5, full seal type radio frequency coaxial-cable according to claim 1, its feature sheath are to make with PVC or PE material.