Je! Kiwango cha chini cha kupinda ni kipi wakati wa kupinda na kuweka mabomba ya PE?

2025-08-18

Bomba la PE hutumiwa sana katika usambazaji wa maji na mifereji ya maji, usafiri wa gesi na mashamba mengine kwa sababu ya unyumbufu wake bora na upinzani wa kutu. Katika mchakato halisi wa kuweka, kutokana na mahitaji tata ya ardhi au kubuni, mara nyingi ni muhimu kupinda bomba la PE. Wakati huu, ni muhimu sana kusimamia radius ya chini ya kupinda ya bomba la PE, ambayo inahusiana moja kwa moja na usalama, maisha ya huduma na ufanisi wa ujenzi wa mfumo wa bomba.

Kinachoitwa radius ya chini ya kupinda inarejelea radius ya chini ya ndani ya arc ya kupinda ya bomba la PE katika hali ya kupinda. Ikiwa radius ya kupinda ni ndogo sana, itasababisha mkazo mkubwa ndani ya bomba, ambayo inaweza kusababisha ukuta wa bomba kunyoosha na nyembamba, kupasuka, na hata kuathiri uwezo wa kubeba shinikizo na uadilifu wa kimuundo wa bomba. Kinyume chake, radius kubwa ya kupinda inaweza kuongeza ugumu wa ujenzi na gharama, na haiwezi kuzoea mazingira magumu ya ujenzi. radius ya chini ya kupinda ya bomba la

PE sio thamani isiyohamishika, inategemea sana kipenyo cha nje (DN) cha bomba na mfululizo wa vipimo vya bomba (kama vile thamani ya SDR, yaani, uwiano wa ukubwa wa kawaida, ambao ni uwiano wa kipenyo cha nje cha nominal kwa unene wa ukuta wa nominal). Kwa ujumla, kipenyo kikubwa cha nje cha bomba, kikubwa cha radius ya chini ya kupinda; thamani kubwa ya SDR (yaani, ukuta wa bomba nyembamba), mahitaji magumu zaidi ya radius ya kupinda. Kwa mfano, kwa bomba la usambazaji wa maji la PE la mfululizo wa SDR11, katika joto la chumba (karibu 20 ° C), radius ya chini ya bending ni karibu mara 12.5 kipenyo cha nje cha bomba; kwa bomba la usambazaji wa maji la PE la mfululizo wa SDR17.6, radius ya chini ya bending ni karibu mara 25 kipenyo cha nje cha bomba. Uangalifu maalum unapaswa kulipwa kwa ukweli kwamba hii ni thamani ya kumbukumbu ya jumla tu. Thamani maalum inapaswa kuwa chini ya mwongozo wa bidhaa au vipimo vya kubuni husika vinavyotolewa na mtengenezaji wa bomba. Kunaweza kuwa na tofauti katika radius ya chini ya bending ya mabomba kutoka kwa wazalishaji tofauti na madaraja tofauti (kama vile PE80, PE100).

Katika ujenzi halisi, ili kuhakikisha kuwa uwekaji wa kupinda wa mabomba ya PE unakidhi mahitaji, pointi zifuatazo zinapaswa kuzingatiwa: Kwanza, kabla ya kupinda, vigezo vya bidhaa vya bomba vinapaswa kuangaliwa kwa uangalifu ili kufafanua radius yake ya chini ya kupinda. . Pili, operesheni ya kupinda inapaswa kufanywa polepole na kwa usawa, na matumizi ya kupinda kwa nguvu ya vurugu yanapaswa kuepukwa ili kuzuia uharibifu wa bomba. Kwa mabomba ya PE yenye kipenyo kikubwa, zana maalum za kupinda bomba au preheating (joto na wakati unahitaji kudhibitiwa ili kuzuia uharibifu wa joto kupita kiasi kwa bomba) inaweza kutumika kusaidia kupinda, lakini kiwango cha kupinda kinahitaji kudhibitiwa kikamilifu. Kwa kuongeza, bomba lililopinda linapaswa kurekebishwa ili kuzuia kurudi tena na kuhakikisha kuwa radius yake ya kupinda katika hali ya kazi sio chini ya thamani maalum.

Ikiwa hali ya ardhi ya tovuti ya ujenzi haiwezi kukidhi mahitaji ya chini ya radius ya kupinda ya bomba la PE, inapaswa kuzingatiwa kubadilisha mwelekeo wa bomba kwa kuunganisha vifaa vya bomba, kama vile kutumia viwiko. Ni marufuku kabisa kupinda bomba la PE hadi chini ya radius yake ya chini inayoruhusiwa ya kupinda ili kushughulikia ardhi, ili kuacha hatari za usalama.

Kwa kifupi, kufahamu kwa usahihi radius ya chini ya kupinda ya bomba la PE wakati wa kupinda na kuweka, ni kiungo muhimu ili kuhakikisha ubora wa uhandisi wa bomba la PE. Wafanyikazi wa ujenzi wanapaswa kuelewa kikamilifu viwango husika, pamoja na sifa maalum za bidhaa na hali ya tovuti, ujenzi wa kisayansi, ili kuhakikisha uendeshaji salama na thabiti wa mfumo wa bomba.


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