Ndeupi musiyano uripo pakati peDN, De, φ, PN neSDR dzakanyorwa papombi?

DN/De/D / Φ / PN/musiyano uripo pakati peSDRS

D: Kazhinji zvinoreva dhayamita yemukati mepombi, dhayamita yedenderedzwa remukati memadziro epombi.

DN: zvinoreva dhayamita yezita, inozivikanwawo seavhareji yedhayamita yekunze, iyo isiri dhayamita yekunze kana dhayamita yemukati mepombi, asi avhareji yedhayamita yekunze neyemukati mepombi. Iyi idhayamita yemataipi nezvimwe zvinoshandiswa. Kushandiswa kwedhayamita yezita kunobatsira pakuita kuti zvikamu zvienderane, uye zviri nyore kugadzira, kugadzira, kugadzirisa uye kutarisira, uye kunoderedza mari yekugadzira. Kune mapaipi, DN inomiririra saizi iri pasi pedhayamita yekunze uye yakakura kupfuura dhayamita yemukati. Inoenderana nedhayamita yezita yepombi, dhayamita yayo yekunze inhamba yakatarwa, uye dhayamita yemukati inosiyana neukobvu hwemadziro.

φ: zvinoreva dhayamita yekunze yepombi, kureva kuti, dhayamita yekunze yepombi kusanganisira ukobvu hwemadziro epombi. Pombi yesimbi isina musono, pombi yesimbi inotenderera inoshandiswa kuratidza saizi yeφ, yakanyorwa muchimiro chedhayamita yekunze X ukobvu hwemadziro. Semuenzaniso, φ 108 x 4 inoratidza pombi ine dhayamita yekunze ye108mm uye ukobvu hwemadziro hwe4mm.

De: zvinoreva dhayamita yekunze yemapaipi. Dhayamita yekunze yemapaipi ePPR, PE uye POLYPROPYLENE inowanzo nyorwa neDe, inowanzo nyorwa muchimiro chedhayamita yekunze X ukobvu hwemadziro. Zvakadai se: De110 x 6.6.

Hukama huripo pakati peDN, De na φ:
De inoyera dhayamita yemadziro ekunze epaipi; DN iri De minus hafu yehukobvu hwemadziro echubhu; φ inoratidza dhayamita yedenderedzwa rakajairika.

De, DN, D, phi zviyero zvavo:
De- PPR, PE pombi, polypropylene pombi dhayamita;
DN– dhayamita yepakati yepombi yepolyethylene (PVC), pombi yesimbi yakakandwa, pombi yesimbi-purasitiki yakasanganiswa, pombi yesimbi yakakandwa;
D — Dhayamita yepakati yepombi yekongiri;
ф– Pombi yesimbi isina musono kana pombi yesimbi isina ferrous inofanira kunyorwa kuti “dhayamita yekunze × ukobvu hwemadziro”.

PN: zvinoreva kumanikidzwa kwemazita, kunoshandiswa kuratidza kumanikidzwa kwemapaipi, mapipe fittings, mavharuvhu nezvimwe zvishandiso zvegoko. Nhamba inoteverwa nebhii rekuti PN haimiriri kukosha kwakayerwa. Semuenzaniso, papombi yePE yekupa mvura yePN1.0mpa, 1.0 inomiririra mwero wekumanikidzwa. Kumanikidzwa kwemazita kunoreva kumanikidzwa kwekushanda kwepombi yemvura patembiricha yechipiri (20℃), ndiko kuti, kumanikidzwa kwakanyanya kunoshanda kunoshanda pamadziro emukati mepombi pasi pemamiriro ekushanda akajairwa. Pari zvino pombi yePE yekupa mvura inoshandiswa yakakamurwa kuita 0.6, 0.8, 1.0, 1.25, 1.6 magiredhi mashanu ekumanikidzwa.

SDR: zvinoreva chiyero chehukuru hwakajairika kana chiyero chehukuru hwakajairika hwemapaipi. SDR iri papombi yekudyara yePE inoreva chiyero chiri pakati pedhayamita yekunze ye nominal de uye ukobvu hwemadziro e nominal EN yepombi, kureva SDR=de/en. Iparamita yakakosha yekudzora ukobvu hwemadziro epombi uye kuona kugona kutakura kumanikidzwa kwemukati. Semuenzaniso, yakanyorwa papombi yePE: SDR26 PN0.6mpa, SDR21 PN0.8mpa, SDR17 PN1.0mpa, SDR13.6PN1.25mpa, SDR11 PN1.6mpa, nezvimwewo.

Pombi yepurasitiki ipurasitiki yakagadzirwa nesimbi pamwe chete nezvimwe zvinowedzerwa kuburikidza nekunyungudutsa zvigadzirwa zvekugadzira molding. Zvinowedzerwa zvinosanganisira plasticizer, stabilizer, filler, lubricant, colorant, ultraviolet absorbent, modifier, nezvimwewo.

Zvinowanzoshandiswamapaipi epurasitikindeidzi: pombi yepolyvinyl chloride yakaoma (PVC-U), pombi yepolyethylene ine density yakakwira (PE-HD), pombi yepolyethylene ine cross-linked (PE-X), pombi yepolypropylene isina kurongeka (PP-R), pombi yepolybutene (PB), mapurasitiki ekugadzira propylene qing-butadiene-styrene copolymer (ABS) nezvimwewo. Kuumbwa kwezvinhu zvepombi yepurasitiki kunosarudza hunhu hwepombi yepurasitiki.

1) Zvakanakira zvikuru zvepombi yepurasitiki

• Kugadzikana kwakanaka kwemakemikari, hakukanganisirwi nezvinhu zvakatipoteredza uye zvikamu zvepakati mupaipi, uye kuramba ngura zvakanaka.

• Kufambiswa kwemhepo kudiki, kufambiswa kwemhepo kushoma, kudzivirira kupisa, uye kuchengetedza simba zvakanaka.

• Kushanda kwemvura muma hydraulic kwakanaka, madziro emukati mepaipi akatsetseka, resistance coefficient idiki, hazvisi nyore kuyera, nzvimbo yekuyerera kwemvura mupaipi haichinji nekufamba kwenguva, uye mukana wekuvharira mapaipi mudiki.

• Kana ichienzaniswa nepombi dzesimbi, ine huremu hushoma, zvinhu zvakareruka, kutakurwa kwayo kuri nyore uye kuiswa kwayo, uye kugadzirisa kwayo kuri nyore. ••

• Kukombama kwechisikigo kana kuti kukotama kunotonhora, kugoverwa kwecoil kunogona kushandiswa kuderedza huwandu hwemajoini epombi.

2) Kushanda zvakanaka kwepombi dzepurasitiki

• PVC-u, PP neABS zvine hunhu hwepamusoro hwemakanika uye zvinoonekwa se "machubhu akaomarara" ane kuiswa kwakavhurika kuri nani. Kusiyana neizvi, PE, PE-X, PB se "chubhu inochinjika" yakakodzera kuputira rima.

• Kudzivirira kupisa uye tembiricha yemapaipi epurasitiki kunoratidza kuti PVC-U, PE, ABS dzinongogona kushandiswa chete pamapaipi emvura inotonhora, nepo PE-X, PP, PB dzichigona kushandiswa semapaipi emvura inopisa. Kana chivako chiine sisitimu yekupa mvura inopisa uye kushandiswa kwepombi dzinopisa nedzinotonhora zvakafanana, kudzivirira kupisa kunova chiratidzo chikuru.

• Mapaipi epurasitiki nekuda kwekuwedzera kwekupisa kwakanyanya, kunyanya sepombi yemvura inopisa mupaipi yepurasitiki, interface inochinjika, majoini ekuwedzera kana makonhi akasiyana-siyana uye mamwe matanho ekubhadhara kupisa akawanda. PE, PP nedzimwe polyolefin ndidzo dzakawanda. Kana kuvaka nekuiswa zvikasanyatsoteerera izvi, uye zvikatora matanho ehunyanzvi anoenderana, zviri nyore kuti interface iite nekuda kwekuwedzera kwejoini kubvisa dambudziko.

• Nekuda kwekudzikira kwekupisa, mashandiro ekudzivirira kupisa kwepombi yepurasitiki akanaka kwazvo uye anogona kuderedza ukobvu hwechikamu chekudzivirira kupisa kana kutoti kusadzivirira kupisa. Kuenzanisa kwekudzivirira kupisa pakati pemachubhu epurasitiki akasiyana hakungonei chete nekufambisa kupisa, asiwo kune chekuita neukobvu hwemadziro epombi dzawo.