[Cov lus piav qhia dav dav] Polyethylene yog cov yas, paub txog nws qhov sib piv siab ntom ntom, yooj thiab tshuaj lom neeg ruaj khov. Nws yog qhov zoo tagnrho rau kev siv lub siab thiab tsis siv cov kav dej. Cov kav dej HDPE feem ntau yog ua los ntawm polyethylene 100 resin, nrog qhov ceev ntawm 930-970 kg / m3, uas yog kwv yees li 7 npaug ntawm cov hlau.

Polyethylene yog ib qho yas, paub txog nws qhov sib piv siab, yooj yim thiab tshuaj lom neeg ruaj khov. Nws yog qhov zoo tagnrho rau kev siv lub siab thiab tsis siv cov kav dej. Cov kav dej HDPE feem ntau yog ua los ntawm polyethylene 100 resin, nrog qhov ceev ntawm 930-970 kg / m3, uas yog kwv yees li 7 npaug ntawm cov hlau. Cov kav dej sib dua yog yooj yim rau kev thauj thiab nruab. Polyethylene tsis cuam tshuam los ntawm cov txheej txheem electrochemical corrosion, thiab nws yog ib qho ntawm cov kav dej kom raug ntsev, kua qaub thiab alkali. Qhov du nto ntawm lub raj polyethylene yuav tsis corroded, thiab kev sib txhuam yog tsawg, yog li cov yas raj tsis yooj yim cuam tshuam los ntawm kev loj hlob ntawm cov kab mob. Lub peev xwm los tiv thaiv corrosion puas thiab ntws tsis tu ncua ua rau kev saib xyuas ntawm HDP kav dej tsawg heev. Polyethylene yeeb nkab tuaj yeem ua los ntawm cov khoom siv ntxiv, cais raws li PE100-RC, thiab ntxiv kom qeeb kev loj hlob tawg. Cov kav dej uas tsim tau tuaj yeem muaj lub neej ua haujlwm ntev, thiab polyethylene muaj txiaj ntsig zoo hauv kev ua neej nyob ntawm qhov project.

Tam sim no hais tias qhov kav ntev ntawm HDPe kav tau raug txiav txim siab, kev lag luam tseem ceeb heev thaum cov kav dej polyethylene siv rau hauv kev txuag dej hauv vaj tse. Piv nrog rau cov kav hlau hlau, qhov pom tseeb tshaj plaws ntawm cov kav dej polyethylene yog tias lawv tuaj yeem tiv thaiv kom tsis txhob tawm. Muaj ob hom kev xa dej xau: kev sib koom ua ke, tawg tawg thiab perforation to, uas yooj yim los daws.

Qhov loj ntawmHDPE yeeb nkabyog nyob nruab nrab ntawm 1600 hli thiab 3260 hli, thiab cov kav dej loj tam sim no tuaj yeem siv rau hauv khw. Ntxiv nrog rau cov kav dej hauv nroog, cov kav dej loj loj uas ua los ntawm polyethylene kuj tseem siv tau rau hauv dej hiav txwv desalination thiab cov chaw kho dej khib nyiab. Cov kav dej loj tuaj yeem yog los ntawm 315 cm mus rau 1200 cm. Txoj kab uas hla lojHDP cevyog heev ruaj thiab txhim khu kev qha. Tom qab muab faus rau hauv av, nws tuaj yeem khiav tau ntau xyoo thiab yuav tsum tau saib xyuas me ntsis, yog li nws tsim nyog rau kev siv dej khib nyiab. Lub durability ntawm cov yeeb nkab polyethylene nce raws li nws qhov loj me, uas qhia tau zoo heev los tiv thaiv kev vibration. Siv lub xyoo 1995 Kobe av qeeg hauv Nyij Pooj ua piv txwv, hauv nroog infrastructure; tag nrho lwm cov kav dej tsis ua haujlwm tsawg kawg ib zaug txhua 3 km, thiab tag nrho HDPE kav dej tsis muaj qhov tsis zoo.

Qhov zoo ntawm HDPE yeeb nkab: 1. Zoo tshuaj stability: HDPE tsis muaj polarity, zoo tshuaj stability, tsis yug algae thiab kab mob, tsis scale, thiab yog ib tug environmentally phooj ywg khoom. 2. Kev sib txuas zoo zog: siv lub qhov (socket) hluav taws xob fusion los yog lub taub qab sib koom ua ke thermal fusion, nrog rau ob peb pob qij txha thiab tsis muaj qhov to. 3. Tsis tshua muaj dej ntws tsis kam: Lub puab nto ntawmHDP cevyog du, nrog tsawg hnav tsis kam coefficient thiab loj txaus. 4. Kev tiv thaiv zoo rau qhov kub thiab txias: qhov kub ntawm brittleness yog (-40), thiab kev tiv thaiv tshwj xeeb tsis tas yuav tsum muaj rau kev tsim kho kub. 5. Zoo abrasion tsis kam: Qhov kev sib piv ntawm kev puas tsuaj ntawm cov kav dej polyethylene thiab cov kav hlau hlau qhia tau hais tias kev puas tsuaj ntawm cov kav dej polyethylene yog 4 npaug ntawm cov kav hlau steel. 6. Kev tiv thaiv kev laus thiab kev ua haujlwm ntev: HDPE yeeb nkab tuaj yeem khaws cia lossis siv sab nraum zoov rau 50 xyoo yam tsis muaj kev puas tsuaj los ntawm hluav taws xob ultraviolet.