Mitundu Yodziwika Ya Sheath Ya Zingwe Zowoneka Ndi Magwiridwe Awo

Kuonetsetsa kuti chingwe cha kuwala chimatetezedwa ku kuwonongeka kwa makina, kutentha, mankhwala, ndi chinyezi, chiyenera kukhala ndi sheath kapena zigawo zina zakunja. Njirazi zimakulitsa bwino moyo wautumiki wa ulusi wamagetsi.

Ma sheath omwe amagwiritsidwa ntchito kwambiri mu zingwe za kuwala ndi monga A-sheaths (aluminium-polyethylene bonded sheaths), S-sheaths (steel-polyethylene bonded sheaths), ndi polyethylene sheaths. Pazingwe zozama zamadzi, zingwe zomata zitsulo zimagwiritsidwa ntchito.

Miyendo ya polyethylene imapangidwa kuchokera ku mizere yotsika kwambiri, yapakati-kachulukidwe, kapenazinthu zakuda za polyethylene zakuda kwambiri, mogwirizana ndi muyezo wa GB/T15065. Pamwamba pa mchira wakuda wa polyethylene uyenera kukhala wosalala komanso wofanana, wopanda thovu lowoneka, mapini, kapena ming'alu. Mukagwiritsidwa ntchito ngati m'chimake chakunja, makulidwe odziŵika sayenera kukhala 2.0 mm, ndi makulidwe osachepera 1.6 mm, ndipo makulidwe apakati pa gawo lililonse sayenera kuchepera 1.8 mm. Makina ndi mawonekedwe a sheath ayenera kukwaniritsa zofunikira zomwe zafotokozedwa mu YD/T907-1997, Table 4.

A-sheath imakhala ndi chinyontho chotchinga chotchinga chopangidwa ndi nthawi yayitali chokulungidwa komanso chopindikapulasitiki yokutidwa ndi aluminiyamu tepi, kuphatikiza ndi m'chimake wakuda wa polyethylene. Chomangira cha polyethylene chimamangirira ndi tepi yophatikizika ndi m'mphepete mwa tepiyo, yomwe imatha kulimbikitsidwanso ndi zomatira ngati pakufunika. Kuphatikizika kwa tepi yophatikizika sikuyenera kukhala kuchepera 6 mm, kapena kwa zingwe zokhala ndi mainchesi osakwana 9.5 mm, kuyenera kukhala kosachepera 20% ya circumference yapakati. The makulidwe mwadzina wa m'chimake polyethylene ndi 1.8 mm, ndi makulidwe osachepera 1.5 mm, ndi makulidwe pafupifupi osachepera 1.6 mm. Kwa zigawo zakunja za Type 53, makulidwe odziwika ndi 1.0 mm, makulidwe ochepa ndi 0.8 mm, ndipo makulidwe ake ndi 0.9 mm. Tepi ya aluminiyamu-pulasitiki yophatikizika iyenera kukumana ndi muyezo wa YD/T723.2, ndi tepi ya aluminiyamu yokhala ndi makulidwe odziwika a 0.20 mm kapena 0.15 mm (osachepera 0.14 mm) ndi makulidwe afilimu ophatikizika a 0.05 mm.

Ma tepi angapo ophatikizika amaloledwa panthawi yopanga zingwe, malinga ngati malo olumikizana ndi osachepera 350 m. Malumikizidwewa ayenera kuonetsetsa kuti magetsi azipitilira ndikubwezeretsanso pulasitiki yophatikizika. Mphamvu pa olowa sikuyenera kukhala osachepera 80% ya mphamvu ya tepi yoyambirira.

S-sheath imagwiritsa ntchito chotchinga chotchinga chinyezi chopangidwa ndi zokutidwa motalika komanso zopindika.tepi yachitsulo yokhala ndi pulasitiki, kuphatikiza ndi m'chimake wakuda wa polyethylene. Chomangira cha polyethylene chimamangirira ndi tepi yophatikizika ndi m'mphepete mwa tepiyo, yomwe imatha kulimbikitsidwa ndi zomatira ngati kuli kofunikira. Tepi yophatikizika yamalata iyenera kupanga mawonekedwe ngati mphete atakulungidwa. M'lifupi mwake siyenera kuchepera 6 mm, kapena kwa zingwe zokhala ndi mainchesi osakwana 9.5 mm, sayenera kukhala osachepera 20% ya circumference yapakati. The makulidwe mwadzina wa m'chimake polyethylene ndi 1.8 mm, ndi makulidwe osachepera 1.5 mm, ndi makulidwe pafupifupi osachepera 1.6 mm. Tepi yachitsulo-pulasitiki yophatikizika iyenera kukumana ndi muyezo wa YD/T723.3, ndi tepi yachitsulo yokhala ndi makulidwe odziwika a 0.15 mm (osachepera 0.13 mm) ndi makulidwe afilimu ophatikizika a 0.05 mm.

Ma tepi ophatikizika amaloledwa panthawi yopanga zingwe, ndikutalikirana kocheperako kwa 350 m. Tepi yachitsulo iyenera kukhala yolumikizana ndi matako, kuonetsetsa kuti magetsi apitirire ndikubwezeretsanso gawo lophatikizana. Mphamvu pa olowa sayenera kuchepera 80% ya choyambirira gulu mphamvu tepi.

Tepi ya aluminiyamu, tepi yachitsulo, ndi zigawo zankhondo zachitsulo zomwe zimagwiritsidwa ntchito poletsa chinyezi ziyenera kukhalabe ndi mphamvu yamagetsi pautali wa chingwe. Pazitsulo zomangika (kuphatikiza zigawo zakunja za Type 53), mphamvu yakupukuta pakati pa aluminiyamu kapena tepi yachitsulo ndi sheath ya polyethylene, komanso mphamvu yopukutira pakati pa m'mphepete mwa aluminiyamu kapena tepi yachitsulo, sayenera kuchepera 1.4 N/mm. Komabe, pamene zinthu zotchinga madzi kapena zokutira zikugwiritsidwa ntchito pansi pa aluminiyamu kapena tepi yachitsulo, mphamvu ya peeling pamphepete mwazitsulo sikufunika.

Kutetezedwa kokwanira kumeneku kumatsimikizira kulimba ndi kudalirika kwa zingwe zowoneka bwino m'malo osiyanasiyana, kukwaniritsa zofunikira zamakina amakono olumikizirana.