Kuti ive nechokwadi chekuti optical cable core yakadzivirirwa kubva kumagetsi, kupisa, kemikari, uye hunyoro-hune kukuvara, inofanirwa kuve yakashongedzerwa nesheath kana mamwe ekunze akaturikidzana. Aya matanho anowedzera zvinobudirira hupenyu hwebasa re optical fibers.
Mashefu anowanzo shandiswa mumatambo emaziso anosanganisira A-sheaths (aluminium-polyethylene bonded sheaths), S-sheaths (simbi-polyethylene bonded sheaths), uye polyethylene sheaths. Kune yakadzika-mvura optical tambo, simbi yakavharwa sheaths inowanzo shandiswa.
Polyethylene sheaths inogadzirwa kubva mutsetse wakaderera-density, yepakati-density, kanahigh-density yakasviba polyethylene zvinhu, inoenderana neiyo GB/T15065 yakajairwa. Iyo pamusoro peiyo yakasviba polyethylene sheath inofanirwa kuve yakatsetseka uye yakafanana, isina mabhuru anooneka, pinholes, kana kuputika. Kana ichishandiswa sechifukidzo chekunze, uwandu hwezita hunofanira kunge huri 2.0 mm, hune hutsika hushoma hwe 1.6 mm, uye hupamhi hwepakati pane chero chikamu chemuchinjikwa haufaniri kuva pasi pe 1.8 mm. Iyo mechanic uye yemuviri zvimiro zvesheath inofanirwa kusangana nezvinodiwa zvakatsanangurwa muYD/T907-1997, Tafura 4.
Iyo A-sheath inoumbwa nemwando barriers layer yakagadzirwa nelongitudinally yakaputirwa uye yakaputirwaplastiki yakavharwa aluminium tepi, yakasanganiswa neyakaburitswa yakasviba polyethylene sheath. Iyo polyethylene sheath inosungirirana ne tepi inoumbwa uye inopindirana mipendero ye tepi, iyo inogona kusimbiswa zvakare nekunamatira kana zvichidikanwa. Iyo inopindirana hupamhi hwetepi inosanganiswa haifanirwe kuve isingasviki 6 mm, kana yetambo cores ine madhayamita asingasviki 9.5 mm, haifanirwe kunge isingasviki 20% yepakati denderedzwa. Ukobvu hwezita hwe polyethylene sheath ndeye 1.8 mm, nehupamhi hudiki hwe 1.5 mm, uye huwandu hwepakati husingasviki 1.6 mm. Kune Type 53 ekunze akaturikidzana, ukobvu hwezita i1.0 mm, ukobvu hwepasi ndeye 0.8 mm, uye avhareji ukobvu i0.9 mm. Iyo aluminiyamu-yepurasitiki inoumbwa tepi inofanirwa kusangana neYD/T723.2 yakajairwa, ine tepi yealuminium ine ukobvu hwezita hwe 0.20 mm kana 0.15 mm (minimum 0.14 mm) uye musanganiswa wefirimu ukobvu hwe0.05 mm.
Mashoma akaumbwa tepi majoini anobvumidzwa panguva yekugadzira tambo, chero nzvimbo yekubatana isiri pasi pe350 m. Aya majoini anofanirwa kuve nechokwadi chekuenderera kwemagetsi uye kudzoreredza iyo composite plastiki layer. Simba pajoini harifanire kunge riri pasi pe80% yesimba rekutanga tepi.
Iyo S-sheath inoshandisa mwando barriers layer yakagadzirwa neakareba yakaputirwa uye yakaputirwa makora.tepi yepurasitiki yakavharwa nesimbi, yakasanganiswa neyakaburitswa yakasviba polyethylene sheath. Iyo polyethylene sheath zvisungo ne tepi inoumbwa uye inopindirana mipendero ye tepi, iyo inogona kusimbiswa nekunamatira kana zvichidikanwa. Iyo corrugated composite tepi inofanira kuumba mhete-yakafanana chimiro mushure mekuputira. Iyo yakatarisana nehupamhi haifanirwe kuve isingasviki 6 mm, kana yetambo cores ine madhayamita asingasviki 9.5 mm, haifanirwe kunge isingasviki 20% yepakati denderedzwa. Ukobvu hwezita hwe polyethylene sheath ndeye 1.8 mm, nehupamhi hudiki hwe 1.5 mm, uye huwandu hwepakati husingasviki 1.6 mm. Iyo tepi yesimbi-yeplastic composite inofanira kusangana neYD/T723.3 yakajairwa, ine tepi yesimbi ine ukomba hwezita hwe 0.15 mm (hushoma 0.13 mm) uye firimu remubatanidzwa ukobvu hwe0.05 mm.
Composite tepi majoini anotenderwa panguva yekugadzira tambo, ine shoma yakabatana spacing ye350 m. Iyo tepi yesimbi inofanirwa kunge yakabatana-yakabatana, ichivimbisa kuenderera kwemagetsi uye kudzoreredza iyo composite layer. Simba riri pajoini harifanire kunge riri pasi pe80% yesimba rekutanga rematepi.
Tepi yealuminium, tepi yesimbi, uye simbi dzesimbi dzezvombo dzinoshandiswa kudzivirira hunyoro dzinofanirwa kuchengetedza kuenderera kwemagetsi pakureba kwetambo. Kune akasungwa sheaths (kusanganisira Type 53 ekunze akaturikidzana), simba rekusvuura pakati pearuminiyamu kana simbi tepi uye polyethylene sheath, pamwe nekusvuura kusimba pakati pemipendero inopindirana yealuminium kana tepi yesimbi, haifanirwe kunge iri pasi pe1.4 N/mm. Nekudaro, kana chinhu chinovharira mvura kana chivharo chikaiswa pasi pearuminiyamu kana tepi yesimbi, kusimba kwekuperera pamipendero yakatarisana haidiwi.
Ichi chakazara chekudzivirira chimiro chinovimbisa kusimba uye kuvimbika kwetambo dzemaziso munzvimbo dzakasiyana siyana, zvinonyatso kuzadzisa zvinodiwa zvemazuva ano ekutaurirana masisitimu.
Nguva yekutumira: Jan-20-2025