CN2624228Y

CN2624228Y - Layer twisted type flame retardant, corrosion-proof, rat biting proof outdoor optical fiber cable for communication

Info

Publication number: CN2624228Y
Application number: CN 03221487
Authority: CN
Inventors: 王柏兴; 陈波瀚; 钱俊; 张丽芳; 龚建良
Original assignee: Jiangsu Changfei Zhongli Optical Fibre & Optical Cable Co Ltd
Current assignee: Jiangsu Changfei Zhongli Optical Fibre & Optical Cable Co Ltd; Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2003-04-23
Filing date: 2003-04-23
Publication date: 2004-07-07
Anticipated expiration: 2013-04-23

Abstract

The utility model relates to an intertwisting type inflaming retarding, corrosion protection, and rat bite proof communicating outdoor optical cable, which is the improvement of present communicating outdoor optical cable structure. The utility model comprises a cable core 6 that is made by winding around a central reinforcing unit 4 by the multiple bushings 3 of an optical fiber or a plurality of optical fibers inside, a charging material 2 that is arranged inside the bushings 3, a layer of water proof strap 7 that is around the cable core, a charging glue that is charged inside all the gaps between the water proof strap 7 and the cable core 6 with the buffering effect, and an inflaming retarding layer 12 that is positioned at the ultra outside layer. Wherein, the external part of the water proof strap is provided with a compound aluminum band layer 8, the outside part of which is closely enclosed with a polyethylene protective layer 9 the outside part of which is covered with a stainless steel band 10; the external part of the stainless steel band 10 is closely enclosed with a double bonding layer 11, the external part of which is covered with an inflaming retarding layer 12. The utility model has the effects of excellent inflaming retarding; corrosion protection and rat bite proof, and also can be safely used for a long period.

Description

Layer-twisted type is fire-retardant, corrosion protection, mouse bite preventing communication outdoor optical cable

Technical field

The utility model is disclosed to be that a kind of layer-twisted type is fire-retardant, corrosion protection, mouse bite preventing communication outdoor optical cable, is to the improvement of existing communication with the outdoor optical cable structure.

Background technology

Along with the development of communication career, communication constantly increases with the application quantity of outdoor optical cable, simultaneously, the requirement that is laid in outdoor communication cable also constantly is particular about.For example: to human settlements compact district, oil field, electric power, abominable, the special area of geographical environment, the serious occasion laying optical cable of mouse insect pest, though anti-high temperature, anti-corrosion, the protection against rodents insect bite factor of chewing is more and more realized by people and pay attention to, but present outdoor optical cable still is confined to the structure that steel band or wrinkle steel band are closed in vertical cladding outside cable core, cause optical cable can't possess resistance flammability, anticorrosive property, protection against rodents worm property, in the future long-term security is used bring hidden danger.

The related half-dry type layer-twisted type communication cable of Chinese patent CN2510876Y as shown in Figure 1 and Figure 2, by be equipped with the loose sleeve pipes 7 of several of optical fiber 5 and or add partially filled rope 2 and be twisted into cable core with " SZ " at strengthening core 4, the outer wrapped polyester band 9 of cable core, wrapped steel or aluminium-plastic tape 3 outside polyester band 9, add sheath 1 at it again, and between cable core and polyester band 9 and between steel or aluminium-plastic tape 3 and the polyester band 9 the institute gapped in the filling hot melt adhesive 10.That this technical scheme is put to the proof with it and be the water blocking tape layer 9 that original polyester band 6 is replaced by low liberation of hydrogen used instead with original mineral ointment 8 by the prior art difference that Fig. 1 reflected and become to hang down liberation of hydrogen hot melt adhesive 10.Thereby this patent technique effect that will reach is presented as can be known: prevent that 1, infiltration because of H+ from causing the decay to optical fiber; 2, improve bond strength between cable core and water blocking tape layer 9, water blocking tape layer 9 and the composite steel-plastic belt 3 with hot melt adhesive not volatile and that have a strong adhesive force; 3, promote block-water effect; 4, to need when the laying optical cable to avoid in the past causing influence to form half dry type to human body, environment with detersive.Still there is following problem in the optical cable of this structure:

1, if hot melt adhesive 10 is liquid, then still have flowability and volatility, this patent is solid-state obviously, because according to normal temperature, hot melt adhesive 10 should be solid-state.But solid-stately make that the overall bulk softness of product is low, in construction, need extremely careful in the laying optical cable, not so can cause its outer steel or aluminium-plastic tape 3 jackknifings of cladding because of factors such as bendings, and and then the jackknifing of bringing disaster to its outer field restrictive coating 1, more and, in the installation fusion process of optical cable, a plurality of loose sleeve pipes 7 must be separated from each other, and after having used hot melt adhesive, cable core knot and become an integral body, add that the bonding of hot melt adhesive is very firm, certainly will adopt speciality tool to come a minute shredding sleeve pipe 7, so that welding, in view of this, hot melt adhesive is a very careful usefulness or seldom used and even exempt from usefulness.

2, steel or aluminium-plastic tape 3 are plastic-coated band or plastic-blasting band, in case moisture content then can cause its corrosion protection result rapid drawdown even the moisture content of trace infiltrates, influence long-term safety and use.

3, owing between steel or aluminium-plastic tape 3 and restrictive coating 1, lack necessary transition bed, therefore no matter be the effect that mutually combines of the two, the ability of still whole high temperature resistant, resistant to rust, anti-mouse insect bite etc. all is very fragile, and optical cable many reasons of damaging are in short-term caused by these factors exactly at present.

Again, Chinese patent CN2354216Y is disclosed to block water, high flame resistance, low smoke Halogen power cable with cross-linked polyethylene insulation, as shown in Figure 3, it be the screen layer 2 that becomes cable core 1 outer set gradually insulation course 8, insulation screen 4, steel band screen layer 5, packed layer 6 (this packed layer 6 comprise intersection around prick waterproofing rope 11, packed layer 10 blocks water), separation layer 7, flame-retardant layer 12, steel-tape armouring layer 8, oversheath 9, the water intrusion that takes place probably of blocking-up becomes the interior passage of cable core 1 by this.This structure is not suitable for also can't transplanting or using for reference on the optical cable, at first, because of packed layer 6 is to constitute around bundle waterproofing rope 11, packed layer 10 by intersecting, expand though help meeting water, blocking-up cable embedding crack is in order to blocking water, and it is with respect to for mineral ointment, the waterstop effect will be inferior very much, the packed layer 6 that adds this structure is easily aging, and the resistance effect life-span is very short, should not be used for the protection to the optical cable core periphery; Secondly, the starting point of this structure is to block water, and chews for corrosion protection, protection against rodents insect bite and can't play inhibiting effect, and in the practical application of optical cable, and more and more problem is chewed in high temperature resistant exactly, the anti-corrosion of the problem that draws attention for people, protection against rodents insect bite.

Summary of the invention

The purpose of this utility model be to provide a kind of corrosion protection, protection against rodents insect bite chew and the flame retardant effect excellence, be suitable for that the layer-twisted type that long-term safety uses is fire-retardant, corrosion protection, mouse bite preventing communication outdoor optical cable.

The purpose of this utility model reaches like this; a kind of layer-twisted type is fire-retardant; corrosion protection; mouse bite preventing communication outdoor optical cable; comprise: one has the many sleeve pipes 3 that are included in one or more optical fiber 1 wherein centers on the cable core 6 that a central reinforce member 4 is twisted into; be contained in the packing material 2 in the described sleeve pipe 3; one deck surrounds the waterstop 7 outside the described cable core 6; be filled in the filling glue 5 and one that the mat in all spaces between waterstop 7 and the cable core 6 plays buffer action and be positioned at outermost flame-retardant layer 12; described waterstop 7 outer being provided with contain aluminium strip layer 8 again; the clad aluminum belt 8 outer tygon protective seams 9 that are extruded with; the tygon protective seam 9 outer one deck stainless steel bands 10 that coat; the stainless steel band 10 outer tack coats 11 again that squeeze, flame-retardant layer 12 is extruded in outside the tack coat 11.

Stainless steel band 10 described in the utility model is a stainless steel 304.

Stainless steel band 10 described in the utility model is a stainless steel 316.

Stainless steel band 10 described in the utility model is an inconel 625.

Tack coat 11 described in the utility model is a tygon.

The thickness of tack coat 11 described in the utility model is 0.6～0.8mm.

Flame-retardant layer 12 described in the utility model is a smoke halogen-free flame-proof plastic for low.

The thickness of flame-retardant layer 12 described in the utility model is 1.4～1.6mm.

Optical cable provided by the utility model has excellent fire retardant, corrosion protection, protection against rodents insect bite and chews effect, can guarantee that long-term safety uses.

Accompanying drawing and drawing explanation

Fig. 1 is the communication cable structural drawing in the cited prior art of the utility model.

Fig. 2 is the cited prior art CN2510876 communication cable structural drawing of the utility model.

Fig. 8 is the cited prior art CN2354216Y power cable structural drawing of the utility model.

Fig. 4 is a structural drawing of the present utility model.

Fig. 5 is the sectional view of Fig. 4 of the present utility model.

Embodiment

Embodiment 1:

Getting some diameters is the sleeve pipe 3 of 1.9mm, comply with in the every sleeve pipe 3 and need placement one or multifiber 1, in the hole of each sleeve pipe 3, hold packing material 2, select this packing material 2 with have enough viscosity so that the weight of optical fiber 1 is applied thereon shearing force in the opposing sleeve pipe 3, simultaneously, allow and reeling, optical fiber 1 moves in pipe in laying and the processing optical cable process, prevent the damage and the crooked loss of trace of optical fiber 1 thus, it is the alleged communication cable filled composite of YD/T839.1-2000 that therefore this packing material 2 adopts Chinese Ministry of Posts and Telecommunications standard No. promulgated by the ministries or commissions of the Central Government.To stranded, claim that again SZ is stranded about some sleeve pipes 3 and a central reinforce member 4 carried out, and in the gap, charge into and fill glue 5, fill glue 5 for communication cable with the filling compound adhesive, constitute layer-twisted type cable core 6 by this.Outside cable core 6, coat one deck waterstop 7 in regular turn; compound aluminium strip 8; outside compound aluminium strip 8, extrude protective seam 9 again; the material of protective seam 9 is a polyolefin; have the tension of enhancing in protective seam 9 outer wrapping to optical cable; resistance to compression; anticorrosion; the stainless steel band 10 of effect is chewed in the protection against rodents insect bite; the material of stainless steel band 10 is preferably stainless steel 304 or 316 or inconel 625; extruding material outside stainless steel band 10 is tygon; thickness is the tack coat 11 of 0.6mm; the last material that extrudes outside this tack coat 11 is many those AFR12 of Pan from Italian import; thickness is the flame-retardant layer 12 of 1.4mm, and this flame-retardant layer has good low-smoke non-halogen flame-retardant characteristic.

Embodiment 2:

Only change the diameter of sleeve pipe 3 and the thickness of tack coat 11 and the thickness of flame-retardant layer 12 into 2.1mm and 0.7mm and 1.5mm respectively, all the other are with embodiment 1.

Embodiment 3:

Only change the diameter of sleeve pipe 3 and the thickness of tack coat 11 and the thickness of flame-retardant layer 12 into 2.4mm and 0.8mm and 1.6mm respectively, all the other are with embodiment 1.

Claims

1; a kind of layer-twisted type is fire-retardant; corrosion protection; mouse bite preventing communication outdoor optical cable; comprise: the cable core (6) that the many sleeve pipes (3) with one or more optical fiber (1) that is included in wherein are twisted into around a central reinforce member (4); be contained in the packing material (2) in the described sleeve pipe (3); one deck surrounds the outer waterstop (7) of described cable core (6); be filled in the filling glue (5) and one that the mat in all spaces between waterstop (7) and the cable core (6) plays buffer action and be positioned at outermost flame-retardant layer (12); it is characterized in that the outer clad aluminum belt (8) that is provided with of described waterstop (7); the outer tygon protective seam (9) that is extruded with of clad aluminum belt (8); the outer one deck stainless steel band (10) that coats of tygon protective seam (9); the outer tack coat (11) again that squeezes of stainless steel band (10), flame-retardant layer (12) is extruded in outside the tack coat (11).

2, fire-retardant, the corrosion protection of layer-twisted type according to claim 1, mouse bite preventing communication outdoor optical cable is characterized in that described stainless steel band (10) is a stainless steel 304.

3, fire-retardant, the corrosion protection of layer-twisted type according to claim 1, mouse bite preventing communication outdoor optical cable is characterized in that described stainless steel band (10) is a stainless steel 316.

4, fire-retardant, the corrosion protection of layer-twisted type according to claim 1, mouse bite preventing communication outdoor optical cable is characterized in that described stainless steel band (10) is an inconel 625.

5, fire-retardant, the corrosion protection of layer-twisted type according to claim 1, mouse bite preventing communication outdoor optical cable is characterized in that described tack coat (11) is a tygon.

6, fire-retardant, the corrosion protection of layer-twisted type according to claim 1, mouse bite preventing communication outdoor optical cable, the thickness that it is characterized in that described tack coat (11) is 0.6～0.8mm.

7, fire-retardant, the corrosion protection of layer-twisted type according to claim 1, mouse bite preventing communication outdoor optical cable is characterized in that described flame-retardant layer (12) is a smoke halogen-free flame-proof plastic for low.

8,, corrosion protection fire-retardant according to claim 1 or 7 described layer-twisted types, mouse bite preventing communication outdoor optical cable, the thickness that it is characterized in that described flame-retardant layer (12) is 1.4～1.6mm.