Te Tukanga Hanga Taura mō ngā Pūnaha Tohatoha Pūngao
He wāhanga nui ngā taura i roto i ngā pūnaha tohatoha hiko. Ki te kore he taura pono, ka kore e pumau te tohatoha hiko mai i ngā tipu hiko ki ngā teihana hiko, ki ngā ahumahi, tae noa ki ngā kāinga. Nō reira, kāore e taea te mahi noa i te tukanga hanga taura mō te tohatoha hiko. Kei roto ko te whiriwhiri rauemi, te hoahoa hangarau, ngā wāhanga whakaputa tika, me te whakamātautau kounga pakari kia mōhio ai he haumaru, he whai hua, he pakari hoki ngā taura. E matapakihia ana e tēnei tuhinga te tukanga hanga taura hiko—ina koa ko ngā taura mō ngā pūnaha tohatoha hiko—mai i te tīmatanga ki te mutunga.
1. Te Whakamahere Taura me ngā Whakatakotoranga
Ko te taahiraa tuatahi ko te whakatau i ngā whakaritenga e ai ki ngā hiahia o te kaupapa me ngā paerewa e tika ana. Ko ngā kaihanga taura e whakamahi ana i ngā paerewa ā-motu/ao whānui pēnei i te SNI, IEC, ASTM rānei. Mā tēnei taahiraa ka whakatauhia:
– Ngaohiko mahi (hei tauira, 0,6/1 kV mō te ngaohiko iti, 12/20 kV mō te ngaohiko waenga, teitei ake rānei mō te tuku).
– Momo arataki hiko (parahi, konumohe rānei).
– Ko te horahanga whakawhiti-wāhanga o te ara iahiko (mm²) e pā ana ki te kaha kawe iahiko.
– Momo ārai (PVC, XLPE, EPR, me ētahi atu).
– Ngā tono tāutanga (rangi, raro whenua, i roto i ngā paipa, i roto i ngā panera, i ngā taiao ahumahi rānei).
– Te hiahia mō ngā ārai ā-ringa pērā i te pukupuku (te pukupuku maitai/konumohe) me ngā pūtu motuhake rānei.
He mea tino nui tēnei whakamahere nā te mea ka tere te wera o ngā taura i ngā hapa i te tīmatanga, ka nui te ngaronga o te hiko, ka tūpono rānei te ahi me te raruraru o te whatunga.
2. Te Kōwhiringa me te Whakarite i ngā Rauemi Mata
Ko ngā taura tohatoha pūngao he maha ngā paparanga e titoa ana: te ara iahiko, te whakamarumaru, te ārai, te whakakī, te hipoki, ā, i ētahi momo, te ārai. Ko ngā rauemi mata matua ko:
1. Kaiārahi (Toka Parahi/Konumohe)
– He nui ake te kawe hiko o te parahi, nō reira ka iti ake te rahi mō te iahiko ōrite, engari he nui ake te utu.
– He mama ake te konumohe, he iti ake te utu, ā, he maha ngā wā ka whakamahia mō ētahi whatunga tohatoha.
2. Rauemi Whakamarumaru
– PVC (Polyvinyl Chloride): e whakamahia whānuitia ana mō te hiko iti, he ngāwari, ā, he iti te utu.
– XLPE (Polyethylene Hononga-Whārite): he mea noa mō ngā ngaohiko reo-waenga me ngā ngaohiko iti e hiahia ana kia pai ake te mahi wera, te ātete wera, me te iti o te mate hiko-whakakore.
3. Rauemi o te Hiku/Hākete
– He mahi hei tiaki i ngā taura mai i te makuku, i ngā matū, i te pakū, me ngā hihi UV.
– Ka taea te hanga mai i te PVC, te PE, ētahi atu rauemi ātete ahi rānei, i runga i ngā whakaritenga.
4. Pūeru (Mēnā e hiahiatia ana)
– Hei tauira, he rīpene maitai, he waea maitai rānei (SWA/STA) hei tiaki ā-ringa, inā koa mō ngā taura e tanumia tika ana.
Me tutuki i ēnei rauemi ngā paerewa kua whakaritea mō te parakore, te kaha ā-pūkaha, me ngā āhuatanga hiko.
3. Tukanga Tuhi Waea
Ina tae mai te rauemi arataki i roto i te āhua tokotoko, ko te taahiraa tuatahi ko te kukume waea, arā, ko te kukume i te tokotoko mā roto i tētahi raupapa o ngā mati kia tutuki rā anō te whānui waea e hiahiatia ana. Ka mahia tēnei tukanga i roto i ngā wāhanga hei ārai i te waea kei pakaru, kei puta rānei he hapa mata.
He maha ngā wā ka whakamahanahia te parahi (ka whakahaeretia te whakamahana) i muri i te kukume hei whakahoki mai i te ngāwari me te whakaiti i ngā ahotea toenga i puta mai i te whakarerekētanga ā-pūkaha. Ko te mutunga iho he waea he whānui tika, he mata maeneene, me ngā āhuatanga ā-pūkaha paerewa.
4. Te Tukanga Hanga Arataki (Te Whakatō)
Kāore i te maha ngā taura tohatoha e whakamahi i te waea kotahi mō ngā rahi nui. I te nuinga o te wā, ka mirohia ngā waea iti kia hanga he ara iahiko ngāwari ake. Ka kiia tēnei tukanga ko te whiri.
He maha ngā momo o te whakatō:
– Te aho porowhita porowhita: he porowhita porowhita ngā paparanga waea.
– He ara iahiko taura kiato: kua kiato hei whakaiti i te whānui katoa o te taura.
– He ara iahiko āhua-wāhanga: he mea noa i roto i ngā taura maha-matua mō te whai huatanga o te wāhi.
I tēnei wā, ka whakahaerehia hoki ngā mana whakahaere tino pakari ki:
– te pūmau o te takahuri,
– te ōritetanga o te diameter,
– me te ātete hiko mō ia roa.
5. Te Whakamahinga o ngā Papa Ārahi me ngā Papa Ārai (Whakaputa)
Ko te taahiraa tino nui i roto i te hanga taura tohatoha ko te extrusion, te tukanga paninga o te rauemi whakamahana mā te whakamahi i te extruder. Ka arahina te arataki mā roto i te pane extrusion (te pane whakawhiti), te wāhi ka rewahia te rauemi whakamahana ka hangaia kia taupokina te arataki.
Mō ngā taura ngaohiko reo-waenga me te ngaohiko teitei, hei tāpiritanga ki te whakamarumaru matua, ko te tikanga:
– He mata arataki hiko (he paparanga arataki haurua kei runga i te arataki) hei whakataurite i te papa hiko.
– He mata ārai (he paparanga haurua-arahi kei runga i te ārai) kia pai ai te tohatoha o te ngaohiko, kia ārai hoki i te tukunga haurua.
– He mata whakarewa i te āhua o te rīpene/waea parahi hei ara mō ngā ia pokanoa me te tiaki hikohiko.
Mō te whakamātao XLPE, i muri i te whakaputanga, ka mahia he tukanga honohono-whiti (hononga-whiti-ngota) mā te whakamahana me te pēhanga, ko te tikanga mā te whakamahi i te pūnaha Whakapūtanga-Kano-tonu (CV). Ka whakapai ake tēnei i te ātete wera me te kaha dielectric.
6. Te Whakamatao me te Whakaritenga Ahu
I muri i te putanga mai i te extruder, ka haere te taura mā roto i tētahi oko whakamatao, i tētahi pūnaha whakamatao motuhake rānei hei whakau i tōna āhua me ōna rahi. I tēnei wāhanga, ka whakahaerehia te mana whakahaere kounga hei whakarite:
– te matotoru o te whakamarumaru kia rite ki ngā paerewa,
– kāore he mirumiru, he āputa, he poke rānei,
– he mata maeneene, he pai te āhua porowhita (kāore te whakamarumaru e "rere" ki tetahi taha).
Mā tētahi hapa iti i tēnei wā ka pā nui ki te roa o te ora o te taura, inā koa mō ngā ngaohiko waenga ka piki ake te mōrearea o te tukunga haurua.
7. Te Hanganga Matua Taura (Te Whakatakotoranga Taura) mō te Matua-Maha
Mō ngā taura he nui atu i te kotahi te matua (hei tauira, he matua-3, he matua-4 rānei kei roto i te tohatoha ngaohiko iti/waenga), ka honoa ia matua wehea mā te tukanga taura (mā te hurihuri i ētahi matua).
Hei hanga i te taura kia porowhita, kia pumau hoki, tāpirihia:
– whakakī: he rauemi kore-waikawa hei whakakī i ngā poka.
– rīpene here: he rīpene here hei ārai i te nekenekehanga o te hanganga matua.
I roto i ngā taura takawaenga, ko te whakaritenga me te ahunga o ngā miro e whakaarohia ana hoki hei whakaiti i ngā pānga ā-whakaoho me te pupuri i te taurite ā-pūkaha.
8. Te Tāuta i te Pūeru (Mēnā e Hiahiatia ana)
Mō ngā tono e hiahia ana ki te tiakitanga tāpiri—pērā i ngā taura e tanumia tika ana, ngā wāhi e pāngia ana e te pānga, ngā taiao ahumahi rānei—ka tāutahia he pukupuku. Ka uru pea ki te tukanga:
– Te rīpene ārai maitai (STA): ka takaihia te rīpene maitai ki te taura.
– Te whakapūmau waea maitai (SWA): he waea maitai kua whakaritea kia porowhita.
Ka whakanui ake te pukupuku i te ātete ki te pēhanga, ki ngā ngau a ngā kararehe, me te kino i te wā e kukume ana i te taura. Heoi, ka whakanui ake i te taumaha me te whānui, nō reira me whai whakaaro te whakamahere tāutanga ki te whānui piko me te kaha kukume.
9. Te Whakarato i tētahi Uwhi o Waho
Ko te paparanga whakamutunga ko te uhi/koti o waho, e whakapūpūtia ana hei uhi i te hanganga taura katoa. Ko te mahi matua o te uhi o waho he tiaki i:
– te haumākū me te wai,
– te waikura,
– te waku,
– te pānga ki te hihi UV (mō ngā taura o waho),
– ētahi matū.
Ko te tikanga, ka tohua te anga ki te waitohu, te rahi, te ngaohiko, te paerewa, te tau i hangaia ai, me te tohu mita kia māmā ai te tautuhi i te wā e tāuta ana me te tiaki.
10. Te Mana Whakahaere me te Tirotiro Kounga
Me whakamātautau ngā taura mō te tohatoha hiko i roto i te tukanga (kei roto i te tukanga) me muri i te otinga (whakamātautau whakamutunga). Ko ngā whakamātautau whānui ko:
– Whakamātautau ātete o te ara iahiko hei whakarite kei roto te ngaronga mana i ngā paerewa.
– Whakamātautau ngaohiko teitei (whakamātautau hipot) hei tirotiro i te kaha o te whakamarumaru.
– Whakamātauria te matotoru o te whakamarumaru me te hipoki mā te whakamahi i te maikirīmita/taonga whatu.
– Whakamātautau tukunga wāhanga (ina koa mō ngā taura ngaohiko reo/teitei).
– Ngā whakamātautau kume me te roa o ngā rauemi whakamahana/whakakī.
– Whakamātautau ātete mura mēnā e hiahiatia ana.
– Te tirotiro ā-kanohi hei kite i ngā hapa o te mata, te āhua porowhita, ngā hapa rānei.
Ko ngā taura anake e tutuki ana i ngā whakaritenga katoa ka taea te tuku ki ngā kiritaki. Mō ngā kaupapa nunui, ka whakahaerehia he whakamātautau kaiwhakaatu, arā, ko te kaiwhakamahi, ko te tari tirotiro rānei e mātakitaki ana i te whakamātautau.
11. Te Tākai me te Tohatoha
Kia oti te whakamātautau, ka hurihia te taura ki roto i ngā pahu rakau/maitai, ki ngā koiri rānei, kia rite ki te rahi. Ka whakaarohia ngā mea e pā ana ki te takai:
– te roa mō ia pahu,
– te taumaha katoa,
– te tiakitanga mō te pito taura (te taupoki pito) hei ārai i te urunga mai o te wai,
– me ngā tikanga kawe kia kore ai te taura e pakaru i te wā e whakahaerea ana.
I te wāhanga whakamutunga, ka whakaurua ngā tuhinga pēnei i ngā tiwhikete whakamātautau, ngā raraunga hangarau me te tutuki i ngā paerewa hei wāhanga o te whakapūmau kounga.
Te Katinga
Ko te tukanga hanga taura mō ngā pūnaha tohatoha pūngao he raupapa o ngā mahi hangarau e hiahia ana kia tino tika. Mai i te kōwhiringa o te ara iahiko me te whakamarumaru, tae atu ki te tuhi me te whiri, te whakaputa me te whakamatao, tae atu ki te whakamātautau kounga, he mea nui katoa ki te whakatau i te pono o te taura i roto i ngā tekau tau o te mahi. Mā ngā tukanga whakaputa tika me te mana whakahaere kounga tino pakari, ka taea e ngā taura te tuku i te pūngao hiko me te haumaru, te whai hua, me te iti o te whakararuraru - ā, ka tautoko i te pumau o ngā pūnaha tohatoha pūngao puta noa i ngā rāngai rerekē.
Ki te hiahia koe, ka taea e au te whakarerekē i tēnei tuhinga ki tētahi momo taura motuhake (hei tauira, te taura XLPE 20 kV mō te tohatoha reo, te taura rangi whakamahana, te taura raro whenua ārai rānei), tae atu ki te tāpiri i ngā hoahoa paparanga me ngā tauira o ngā whakatakotoranga hangarau.
