Yintoni umahluko phakathi kwe-DN, De, φ, PN kunye ne-SDR eziphawulwe kumbhobho?

DN/De/D / Φ / PN/umahluko phakathi kwe-SDRS

D: Ngokubanzi ibhekisa kububanzi bangaphakathi bombhobho, ububanzi besangqa sangaphakathi sodonga lombhobho.

I-DN: ibhekisa kububanzi obuqhelekileyo, okwaziwa ngokuba bububanzi obuqhelekileyo bangaphandle, obungengobubanzi bangaphandle okanye ububanzi bangaphakathi bombhobho, kodwa bububungakanani obuqhelekileyo bobubanzi bangaphandle nobubanzi bangaphakathi. Olu luluhlu oluqhelekileyo lobubanzi beepayipi kunye nezixhobo. Ukusetyenziswa kobubanzi obuqhelekileyo kuluncedo ekufezekiseni ukulungelelaniswa kwamacandelo, kwaye kulula ukuyila, ukuvelisa, ukulungisa kunye nokulawula, kwaye kunciphisa iindleko zokuvelisa. Kwimibhobho, i-DN yindlela yokubonisa ubungakanani obungaphantsi kobubanzi bangaphandle kwaye bukhulu kunobubanzi bangaphakathi. Ngokuhambelana nobubanzi obuqhelekileyo bombhobho, ububanzi bayo bangaphandle buxabiso elimiselweyo, kwaye ububanzi bangaphakathi buyahluka ngokobukhulu bodonga.

I-φ: ibhekisa kububanzi bangaphandle bombhobho, oko kukuthi, ububanzi bangaphandle bombhobho kuquka nobukhulu bodonga lombhobho. Umbhobho wentsimbi ongenanto oqhelekileyo, umbhobho wentsimbi ojikelezayo usetyenziselwa ukuphawula ubungakanani be-φ, ophawulwe ngohlobo lobubanzi bangaphandle bodonga X. Umzekelo, i-φ 108 x 4 ibonisa umbhobho onobubanzi bangaphandle be-108mm kunye nobukhulu bodonga be-4mm.

I-De: ibhekisa kububanzi bangaphandle beepayipi. Ububanzi bangaphandle beepayipi ze-PPR, PE kunye ne-POLYPROPYLENE buhlala buphawulwa yi-De, ngokuqhelekileyo buphawulwa ngohlobo lobubanzi bangaphandle bedonga lwe-X. Ezifana nezi: De110 x 6.6.

Ubudlelwane phakathi kwe-DN, i-De kunye ne-φ:
U-De ulinganisa ububanzi bodonga lwangaphandle lombhobho; i-DN yi-De minus isiqingatha sobukhulu bodonga lombhobho; u-φ ubonisa ububanzi besangqa esiqhelekileyo.

De, DN, D, phi ububanzi bazo:
I-De- PPR, umbhobho we-PE, i-polypropylene pipe diameter;
DN– ububanzi obuqhelekileyo bombhobho we-polyethylene (PVC), umbhobho wesinyithi ophosweyo, umbhobho odibeneyo wentsimbi-iplastiki, umbhobho wesinyithi ogqunyiweyo;
D — Ububanzi obuqhelekileyo bombhobho wekhonkrithi;
ф– Umbhobho wentsimbi ongenamthungo okanye umbhobho wesinyithi ongenasinyithi kufuneka ubhalwe “ububanzi bangaphandle × ubukhulu bodonga”.

I-PN: ibhekisa kuxinzelelo oluqhelekileyo, olusetyenziselwa ukubonisa uxinzelelo lweepayipi, izixhobo zombhobho, iivalvu kunye nezinye izixhobo zeqokobhe. Inani elilandelwa ngunobumba u-PN alimeli ixabiso elilinganisiweyo. Umzekelo, kumbhobho wokuhambisa amanzi we-PE we-PN1.0mpa, i-1.0 imele inqanaba loxinzelelo. Uxinzelelo oluqhelekileyo lubhekisa kuxinzelelo olusebenzayo lokudluliselwa kwamanzi kombhobho kubushushu besibini (20℃), oko kukuthi, uxinzelelo oluphezulu oluqhubekayo olusebenza eludongeni lwangaphakathi lombhobho phantsi kwemeko yokusebenza eqhelekileyo. Ngoku umbhobho wokuhambisa amanzi we-PE osetyenziswa rhoqo wahlulwe waba ngama-0.6, 0.8, 1.0, 1.25, 1.6 amabakala oxinzelelo amahlanu.

I-SDR: ibhekisa kumlinganiselo wobungakanani obuqhelekileyo okanye umlinganiselo wobungakanani obuqhelekileyo beepayipi. I-SDR kumbhobho we-PE feed ibhekisa kumlinganiselo ophakathi kobubanzi obuqhelekileyo be-de kunye nobukhulu bodonga obuqhelekileyo be-EN yombhobho, oko kukuthi i-SDR=de/en. Yiparameter ebalulekileyo yokulawula ubukhulu bodonga lombhobho kunye nokumisela amandla okuthwala uxinzelelo lwangaphakathi. Umzekelo, ephawulwe kumbhobho we-PE: SDR26 PN0.6mpa, SDR21 PN0.8mpa, SDR17 PN1.0mpa, SDR13.6PN1.25mpa, SDR11 PN1.6mpa, njl.

Umbhobho weplastiki yi-resin yokwenziwa kunye nezongezo ezisetyenziswa kwiimveliso zokulungisa ukubumba. Izongezo ziquka i-plasticizer, i-stabilizer, i-filler, i-lubricant, i-colorant, i-ultraviolet absorbent, i-modifier, njl.njl.

Iqhele ukusetyenziswaimibhobho yeplastikizezi: umbhobho we-polyvinyl chloride oqinileyo (PVC-U), umbhobho we-polyethylene oxineneyo kakhulu (PE-HD), umbhobho we-polyethylene odibeneyo (PE-X), umbhobho we-polypropylene we-copolymer ongacwangciswanga (PP-R), umbhobho we-polybutene (PB), iiplastiki zobunjineli i-propylene qing-butadiene-styrene copolymer (ABS) njalo njalo. Ukwakheka kwezinto zombhobho weplastiki kumisela iimpawu zombhobho weplastiki.

1) Iingenelo eziphambili zombhobho weplastiki

• Uzinzo olufanelekileyo lweekhemikhali, aluchaphazeleki ziimeko zokusingqongileyo kunye nezinto eziphakathi kwipayipi, kwaye luyakwazi ukumelana nokugqwala.

• Ukuhanjiswa kobushushu okuncinci, ukuhanjiswa kobushushu okuphantsi, ukuthintela ubushushu, isiphumo esihle sokonga umbane.

• Ukusebenza kakuhle kwe-hydraulic, udonga lwangaphakathi lombhobho lugudileyo, i-resistance coefficient incinci, akukho lula ukuyilinganisa, indawo yokuhamba kombhobho ayitshintshi ngokuhamba kwexesha, kwaye amathuba okuvimba umbhobho mancinci.

• Xa ithelekiswa nombhobho wesinyithi, inoxinano oluphantsi, izinto ezikhaphukhaphu, kulula ukuyithutha nokufaka, kwaye kulula ukuyilungisa.

• Ukusebenza kokugoba kwendalo okanye ukusebenza kokugoba okubandayo, unikezelo lwekhoyili lunokusetyenziswa ukunciphisa inani lamalungu epayipi.

2) Impembelelo yokusebenza kwemibhobho yeplastiki

• I-Pvc-u, i-PP kunye ne-ABS zineempawu eziphezulu zoomatshini kwaye zithathwa njenge "iityhubhu eziqinileyo" ezinokufakelwa okuvulekileyo okungcono. Ngokwahlukileyo koko, i-PE, i-PE-X, i-PB "njengetyhubhu eguquguqukayo" efanelekileyo kwi-dark coating.

• Ukumelana nobushushu kunye nobushushu bombhobho weplastiki kumisela ukuba i-PVC-U, i-PE, i-ABS zinokusetyenziswa kuphela kumbhobho wamanzi abandayo, ngelixa i-PE-X, i-PP, i-PB zingasetyenziswa njengombhobho wamanzi ashushu. Xa isakhiwo sinenkqubo yokubonelela ngamanzi ashushu kunye nokusetyenziswa kombhobho oshushu nobandayo ofanayo ukumelana nobushushu kuba luphawu oluphambili.

• Umbhobho weplastiki ngenxa yokwanda kobushushu okuphezulu, ingakumbi njengombhobho wamanzi ashushu kumbhobho weplastiki, ujongano oluguquguqukayo, iindawo zokwandisa okanye iindlela ezahlukeneyo zokugoba kunye nezinye iindlela zokuhlawula ubushushu zininzi. I-PE, i-PP kunye nezinye i-polyolefin zezona zininzi. Ukuba ulwakhiwo kunye nofakelo alunikeli ngqalelo yaneleyo koku, kwaye luthatha amanyathelo obuchwephesha ahambelanayo, kulula ukuba kwenzeke kumbhobho ngenxa yokunyuka kwejoyinti.

• Ngenxa yokuba ubushushu abudluli kakhulu, ukusebenza kobushushu bombhobho weplastiki kugqwesileyo kwaye kunokunciphisa ubukhulu bomaleko wobushushu okanye ukungabikho kobushushu. Uthelekiso lobushushu phakathi kweetyhubhu zeplastiki ezahlukeneyo aluhambelani nje kuphela nobushushu, kodwa lukwanxulumene nobukhulu bodonga lweepayipi zazo.