Umtjhini wokuthola ilangabi nentuthu wokufaka umtjhini wokuvikeleka
Isingeniso
Ukuphepha nokukhandela umlilo kuqakathekile kiyo nanyana ngiyiphi indawo. Ziqakatheke khulu eendaweni eziyingozi ezithambekele emlilweni nokuqhuma. Kilokhu, Ukuphepha kwangaphakathi iinsetjenziswa zokuthola umlilo kanye neenqabo zokuphepha zangaphakathi zizuzisa khulu. Iinhlelo ezikhethekileko lezi zenzelwe ukukhandela imililo nokuqhuma. Bakwenza lokhu ngokwehlisa amandla kagesi nawokutjhisa erherhweni lokuthola.
Amaphuzu aqakathekileko:
nIinsetjenziswa zokuthola umlilo eziphephileko ziindlela eziqakathekileko zokuphepha eendaweni eziyingozi ezineegesi eziqhumako nofana izinto ezivuthako.
nUmhlobo lo wemitjhini ekhethekileko uqeda khulu ubungozi bokuvutha ngokukhawulela khulu ukukhiqizwa kwamandla wokufuthumala kagesi.
nEendaweni ezisengozini ekulu ezifana namakhemikhali we-petroleum, ukukhiqizwa kwemithi, kanye nokugcinwa kwezinto eziyingozi, ithekhnoloji le ayikwazi ukuthathelwa indawo.
nUkwazi ubujamo nobujamo obusebenzako bemihlobo ehlukileko yeenzwa zokuphepha zangaphakathi kuyinto eqakathekileko ekwakheni ihlelo lokuvikela umlilo eliqondileko.
nUkusebenza kokuphepha nokuzinza kokusebenza kwama-detector aqinisekiswe ziinhlangano zamazwe ngamazwe ezifana I-Atex ziqinisekiswe ngokusemthethweni.
Isisetjenziswa sokuthola umlilo sokuphepha sangaphakathi sisebenza njani?
nEendaweni ezivuthako neziqhumako ezifana namafutha nerhasi, amakhemikhali, nokusetjenziswa kwamabele, iinsetjenziswa zokuthola umlilo zendabuko zibeka ubungozi bokuphepha ngebanga lokuthi zingakhiqiza iinhlansi zegezi nofana ukutjhisa khulu kwendawo, ngesikhathi iinsetjenziswa zokuthola ukuphepha kwangaphakathi (IS) ziqinisekisa ukusebenza okuphephileko eendaweni eziyingozi ngokusebenzisa umklamo okhethekileko.
nIthekhnoloji yayo eqakathekileko isendleleni yokunciphisa amandla: ngokulawula ngokunembileko amandla wamanje nawokutjhisa emjikelezweni, iqinisekisa bona imitjhini leyo angeze yakhiqiza iinhlansi zokuvutha namkha amazinga womtjhiso aphezulu ayingozi ngaphasi kwananyana ngibuphi ubujamo bokusebenza. Ukufikelela umnqopho lo, ihlelo kufanele lifakwe isithiyo sokuphepha - into eqakathekileko efakwe hlangana nomlawuli we-alamu nemitjhini ye-IS, engavimba ukudluliswa kwamandla ngokweqileko begodu igcine amandla wesekethe ngaphasi komkhawulo wokuphepha ngaso soke isikhathi.
nUmklamo wokuvikela ophindwe kabili (umkhawulo wamandla wangaphakathi+umkhawulo wokuphepha wangaphandle) wenza umtshina we-IS ube sisombululo esithembekileko sokutjheja umlilo eendaweni ezisengozini ekulu, ngesikhathi sihlangabezana namazinga weentjhabatjhaba wokuvikela ukuqhuma njenge-ATEX.
Ukuthobela namazinga weensetjenziswa zokuthola umlilo zokuphepha kwangaphakathi e-UK
E-UK, kunemithetho eqinileko yokusetjenziswa kwemitjhini yokuphepha emlilweni eendaweni eziyingozi. Ukuthobela imithetho le akusiyo imfuneko yomthetho kwaphela, kodwana kuqakathekile ekuqinisekiseni ukuphepha kwabasebenzi nokusebenza kuhle.
Isethi eqakathekileko yemithetho yi- Imilayo ye-Atex. Imithetho le ithathwe emiyalweni ye-EU ehlose ukuhlanganisa amazinga wokuphepha wemitjhini esetjenziswa eendaweni lapho kungenzeka khona ukuqhuma.
Imithetho ye-ATEX iqakathekile kibo boke abenza, athengise, nofana asebenzise iinsetjenziswa zokuphepha eendaweni lapho kungenzeka khona ukuqhuma. Eendaweni eziyingozi ngaphakathi kwe-European Union (okufaka hlangana i-UK), yoke imitjhini namahlelo wokuvikela kufanele akhambisane nemithetho ye-ATEX.
Ibanga | Ihlathululo |
Umyalo we-ATEX 2014/34/EU | Lokhu kufaka hlangana imitjhini neenhlelo zokuvikela ezisetjenziswa eendaweni lapho kungenzeka khona ukuqhuma. |
IEC 60079 | Isethi yemithetho yamazwe ngamazwe yokuthi ungaklama njani, ufake, begodu usebenzise njani imitjhini kagesi eendaweni eziqhumako. |
Ukuzwisisa nokuthobela imithetho le kuqakathekile. Lokhu kusiza ukuqinisekisa ukuphepha lokha nawusebenzisa iinsetjenziswa zokuthola umlilo ezivikelekileko eendaweni eziyingozi.
Khetha iinqabo ezifaneleko zokuphepha zangaphakathi
Thina, i-Beijing Pinghe, njengomthengisi wezithiyo ezisezingeni eliphezulu, sinehlelo lokuthuthukisa elihlose ukwehlisa ubukhulu bezithiyo, ukwenza bona zibe lula begodu zibe lula ukuzisebenzisa, ukwenza kube lula ukufakwa, ukwehlisa ubungozi bokwehluleka, nokunikela ngezithiyo ezilungele ngokupheleleko amahlelo wokusebenza.
I-PHD-11TN-11 yethu ne-PHD-22TN-1111 yenzelwe ukusetjenziswa khulukhulu neensetjenziswa zokuthola intuthu.
Isiginali efakwako yeensetjenziswa zokuthola amalangabi nentuthu ziinqabo zokuphepha ezihlukanisiweko, ezinganikela amandla wokuhlukanisa iinsetjenziswa zokuthola amalangabi eendaweni eziyingozi. Iinsetjenziswa zokuthola amalangabi zikhiqiza amatshwayo we-0-40mA ahlukaniswe eendaweni eziyingozi begodu adluliselwe eendaweni eziphephileko, adlala indima ekuhlaselweni kwentuthu. Umkhiqizo lo unikelwa amandla mtjhini wokukhipha begodu ulungele iinhlelo ze-DCS/PLC ezisebenza nge-loop.
Umkhiqizo lo awutlhogi ukuphakelwa kwamandla okuzijameleko, begodu amatheminali wokufaka nokukhipha ahlukaniswe.
