CN202210179U

CN202210179U - Novel fire-resistant optical cable

Info

Publication number: CN202210179U
Application number: CN2011203090228U
Authority: CN
Inventors: 郑逢青
Original assignee: SHENZHEN NECERO OPTICAL FIBER OPTICAL CABLE CO Ltd
Current assignee: SHENZHEN NECERO OPTICAL FIBER OPTICAL CABLE CO Ltd
Priority date: 2011-08-22
Filing date: 2011-08-22
Publication date: 2012-05-02
Anticipated expiration: 2021-08-22

Abstract

The utility model discloses a novel fire-resistant optical cable, which includes a cable core and a flame-retardant sheath sleeved outside the cable core, wherein the cable core includes one or more optical fiber units and a non-metallic center reinforcer; the optical fiber units are stranded around the non-metallic center reinforcer; each optical fiber unit includes a sleeve as well as optical fibers and filling glue which are coated inside the sleeve; a layer of fire-resistant mica tape is tightly wound and wrapped outside each sleeve, the non-metallic center reinforcer and the cable core; and spaces among all the optical fiber units in the cable core are filled with fire extinguishing powder. When the novel fire-resistant optical cable is used, the fire-resistant optical cable can be used safely and the internal optical fibers can be prevented from being burned out even if the optical cable is being burnt for a long time in a fire accident or a sheath is damaged, so that the normal communication of the optical fibers is guaranteed.

Description

A kind of novel fireproof cable

Technical field

The utility model relates to a kind of optical cable, relates in particular to a kind of optical cable with good fire protecting performance.

Background technology

Development along with telecommunications; The use of optical cable is more and more universal; This has proposed new requirement also for the structure and the performance of optical cable; Particularly the oil field occurs the use of communications optical cable, the new mode that Fiber to the home, the optical fiber of fiber to the desk uses, and at these inflammable environment, to how guaranteeing the proper communication of optical fiber in fire has higher requirement.Used optical cable generally all adopts the PE material to make sheath now, and the PE material itself is exactly a combustible; And traditional fire-retardant cable also just adopts general sleeve pipe clad optical fiber, and then outside sleeve pipe, simply coats one deck fire retardant jacket, and fire retardant jacket can not burnt out under the situation of weak point ignition time; Thereby the optical fiber of the inside can not burnt out yet, and plays anti-fire action, but under the situation of fire retardant jacket breakage; Perhaps under the situation of environment that catches fire for a long time such as fire; Fire retardant jacket itself also can be burnt out, thereby the inner optical fiber of optical cable also just is easy to burn out, and causes communication to carry out.

The utility model content

The purpose of the utility model is to provide a kind of optical cable with good fire protecting performance, and the proper communication of optical fiber is guaranteed in use that can also safety under the damaged situation of breaking out of fire or sheath.

For realizing above-mentioned purpose, the technical scheme that the utility model adopted is:

A kind of novel fireproof cable; Comprise the fire retardant jacket that cable core is outer with being placed in cable core; Said cable core comprises one or more fiber unit and a nonmetal central reinforce member; Said fiber unit is stranded around nonmetal central reinforce member, and said fiber unit comprises a sleeve pipe and be coated on the optical fiber and filling glue in the sleeve pipe that said sleeve pipe closely is surrounded with one deck mica tape outward.

Said nonmetal central reinforce member closely is surrounded with one deck mica tape outward.

Space in the said cable core between each fiber unit is filled with fire fighting powder.

Said cable core closely is surrounded with one deck mica tape outward, and said wrapped mica tape outside cable core is between cable core and fire retardant jacket.

Be provided with between said fire retardant jacket and the wrapped mica tape outside cable core and tear rope.

Space in the said cable core between each fiber unit also is filled with water blocking yarn.

Said cable core also comprises gasket for packing, and said gasket for packing and fiber unit are stranded around said nonmetal central reinforce member.

After adopting technique scheme, during use, even under the situation that breaking out of fire causes catching fire for a long time or sheath is damaged, the use that the utility model fireproof cable can also safety, internal optical fiber is not burnt out, and guarantees the proper communication of optical fiber.

Description of drawings

Fig. 1 is the utility model fireproof cable schematic cross-section.

Embodiment

Below will specify a kind of novel fireproof cable with reference to accompanying drawing according to the utility model embodiment.

As shown in Figure 1, the utility model fireproof cable comprises cable core 1 and is placed in the outer fire retardant jacket 2 of cable core 1, and said fire retardant jacket 2 can be halogen-free low-smoke flame retardant material or flame-proof PVC is processed, and thickness is 1.6-1.8mm.

Said cable core 1 comprises one or more fiber unit 11 and a nonmetal central reinforce member 12.Said nonmetal central reinforce member 12 is positioned at fiber unit 11 centers, and promptly said fiber unit 11 is stranded around nonmetal central reinforce member 12.In the present embodiment, preferably, said nonmetal central reinforce member 12 adopts FRP to process.Said fiber unit 11 comprises a sleeve pipe 111 and is coated on the optical fiber 112 and filling glue 113 in the sleeve pipe 111 that said filling glue 113 adopts the alleged communications optical cable of YD/T839.1-2000 to use filled composite, mainly plays buffer action.

In the present embodiment, the sleeve pipe 111 outer mica tapes 3 that closely are surrounded with one deck fire insulation in each fiber unit 11, thereby even under the situation of fire retardant jacket 2 breakages; Perhaps when environment that catches fire for a long time such as fire fire retardant jacket 2 by under the situation about burning out; Wrapped mica tape 3 outside sleeve pipe 111 also can make fiber unit 11 exhausted with fire screen in fire hazard environment, stops fiber unit 11 and is lighted, and is lighted and burns out thereby stop optical fiber 112; The communication of guaranteeing is normal, reaches the fire prevention purpose.

In the present embodiment; Preferably, the nonmetal central reinforce member 12 outer mica tapes 3 that also closely are surrounded with one deck fire insulation are added nonmetallic materials and in fire, can not conducted heat; Guarantee that outside heat can not pass to the center of said optical cable; Thereby can make nonmetal central reinforce member 12 exhausted with fire screen in fire hazard environment, can not lighted, thereby preventing further that optical fiber 112 from being lighted burns out.

In the present embodiment; Preferably, the whole cable core 1 outer mica tape 3 that also closely is surrounded with one deck fire insulation promptly also is provided with mica tape 3 between cable core 1 and fire retardant jacket 2; Even thereby guarantee under the situation of fire retardant jacket 2 breakages in fire hazard environment; Also can make cable core 1 and outer fire screen exhausted, stop cable core 1 and lighted, thereby preventing further that optical fiber 112 quilts from being lighted burns out.

In the present embodiment; Preferably, the space in cable core 1 between each fiber unit 11 is filled with fire fighting powder 5, when fire fighting powder 5 can have fire at the port of optical cable; Guarantee that the port of optical cable is not lighted; Even and can guarantee under the damaged situation of in burning fire retardant jacket 2 and tight wrapped mica tape 3 in cable core 1 outside the fire of breakage is not extended toward optical cable is inner, thereby preventing further that optical fiber 112 quilts from being lighted burns out.Preferably, fire fighting powder 5 is BC powder extinguishing agent (soda mint) or ABC dry powder (ammonium phosphate salt).

In addition, the space in cable core 1 between each fiber unit 11 also is filled with water blocking yarn 4, between fire retardant jacket 2 and wrapped mica tape 3 outside cable core 1, is provided with to tear rope 6.

During assembling; In every sleeve pipe 111, place one or more optical fiber 112 by demand; And in the hole of each sleeve pipe 111, fill the filling glue 113 completely play buffer action; Tight wrapped one deck mica tape 3 outside each sleeve pipe 111 respectively then is with the also tight wrapped one deck mica tape 3 of nonmetal central reinforce member 12; About carrying out round the nonmetal central reinforce member that closely is surrounded with mica tape 3 12, the sleeve pipe 111 that will closely be surrounded with mica tape 3 again, claims that also SZ is stranded, in other embodiments to stranded; Also can adopt other known stranded modes; The stranded water blocking yarn 4 of placing simultaneously, and charge into fire fighting powder 5 in the gap between each fiber unit 11, constitute layer-twisted type cable core 1; Tight wrapped one deck mica tape 3 outside cable core 1 again; Extrude last layer fire retardant jacket 2 at last, put into one or more when extruding fire retardant jacket 2 and tear rope 6, tear rope 6 between fire retardant jacket 2 and wrapped mica tape 3 outside cable core 1.

In other embodiments, said cable core 1 also comprises gasket for packing (figure do not show), and promptly fiber unit 11 is stranded around nonmetal central reinforce member 12 with gasket for packing.

In sum, even the use that the utility model fireproof cable can also safety under the situation that breaking out of fire causes catching fire for a long time or sheath is damaged, internal optical fiber 112 is not burnt out, and guarantees the proper communication of optical fiber 112.

The explanation of the utility model being done in conjunction with the foregoing description only is used to understand the enforcement of the utility model; Non-ly be used to limit the utility model; Through above explanation, those skilled in the art can make numerous variations and revision in not breaking away from the technological thought scope of the utility model; Therefore, the protection domain of the utility model defines with the claim scope of patent.

Claims

1. novel fireproof cable; Comprise the fire retardant jacket that cable core is outer with being placed in cable core; It is characterized in that: said cable core comprises one or more fiber unit and a nonmetal central reinforce member; Said fiber unit is stranded around nonmetal central reinforce member, and said fiber unit comprises a sleeve pipe and be coated on the optical fiber and filling glue in the sleeve pipe that said sleeve pipe closely is surrounded with one deck mica tape outward.

2. a kind of novel fireproof cable according to claim 1 is characterized in that: said nonmetal central reinforce member closely is surrounded with one deck mica tape outward.

3. a kind of novel fireproof cable according to claim 1 and 2, it is characterized in that: the space in the said cable core between each fiber unit is filled with fire fighting powder.

4. a kind of novel fireproof cable according to claim 3 is characterized in that: said cable core closely is surrounded with one deck mica tape outward, and said wrapped mica tape outside cable core is between cable core and fire retardant jacket.

5. a kind of novel fireproof cable according to claim 4 is characterized in that: be provided with between said fire retardant jacket and the wrapped mica tape outside cable core and tear rope.

6. according to claim 1 or 2 or 4 or 5 described a kind of novel fireproof cables, it is characterized in that: the space in the said cable core between each fiber unit also is filled with water blocking yarn.

7. a kind of novel fireproof cable according to claim 6, it is characterized in that: said cable core also comprises gasket for packing, said gasket for packing and fiber unit are stranded around said nonmetal central reinforce member.