I. Bayani

An yi thermocouple mai fashewa bisa ga ƙa'idodin Q / ZZ HHX002-2012 "HX-WR fashewa mai fashewa", GB3836.1-2010 "Fashewa mai fashewa" Sashe na 1: Kayan aiki na gaba ɗaya, GB3836.2-2010 "Fashewa mai fashewa" Sashe na 2: Kayan aiki da aka kare ta fashewa mai fashewa "d", alamar fashewa ita ce Ex d II C T6 Gb.

Wannan samfurin ne wani nau'i na ma'auni na'urar amfani a cikin fashewa gas, tururi, hazo masana'antu muhalli, sau da yawa amfani da kuma nuna ma'auni, daidaitawa ma'auni, mai watsawa da sauransu goyon baya, kai tsaye auna zafin jiki na daban-daban gas, ruwa kafofin watsa labarai a cikin daban-daban samar da aiki.

An bincika samfurin ta hanyar cibiyar binciken ingancin kayayyakin lantarki na ƙasa da ya sami takardar shaidar fashewa, lambar takardar shaidar fashewa ta CNEx13.

II. Ka'ida

1. Ka'idar auna zafi

Ka'idar aikin thermocouple ta dogara ne akan abubuwa daban-daban gudanarwa biyu da aka haɗa zuwa cibiyar sadarwa, idan yanayin zafin jiki na ƙarshen haɗin biyu ya bambanta, zai samar da yanayin zafi a cikin zagaye.

Thermocouple ya ƙunshi wayoyi biyu daban-daban (thermoelectrodes) A da B, ƙarshen su T1 yana walda juna, samar da ƙarshen ma'auni na thermocouple T1 (wanda ake kira ƙarshen aiki). Saka shi a cikin kafofin watsa labarai na zafin jiki da za a auna: yayin da wani ƙarshen thermocouple T0 (ƙarshen tunani ko ƙarshen kyauta) ya haɗa da na'urar nuni, idan akwai bambancin zafin jiki a ƙarshen ma'auni na thermocouple da ƙarshen tunani, na'urar nuni za ta nuna ƙarfin zafin lantarki da thermocouple ta samar.

Karfin zafi na thermocouple yana ƙaruwa tare da haɓaka zafin jiki na ƙarshen aunawa, girmansa yana da alaƙa ne kawai da zafin jiki na kayan thermocouple da ƙarshen thermocouple, yayin da tsawon lantarkin zafi, diamita ba shi da alaƙa.

2. Ka'idar fashewa

Tsarin fashewa mai fashewa ya dogara ne akan mafi girman gwajin tsaro, ta hanyar kashewa da sanyaya na fashewa mai fashewa, ta hanyar fashewa mai fashewa wanda ke fashewa a cikin fashewa mai fashewa kuma fashewa ba ya lalacewa, kuma ba zai haifar da ka'idar fashewa mai fashewa na waje ba.

Wannan samfurin ya dace da fashewa na yankin 1, yankin 2 na ƙonawa gas ko tururi da iska samar da kasancewar IIA, IIB, IIC grade, T1 ~ T6 rukuni

Yankin 1 da yankin 2 na jima'i.

Bayani da ma'anar samfurin thermocouple kamar haka:

1. Ma'auni kewayon: 0 ~ + 800 ℃

2. Alamar fashewa: Ex d IIC T6 Gb

3. Kariya matakin: IP65

4. raba lambar: Table 1

5. Amsa lokaci: 90 ~ 180s

6. Rated ƙarfin lantarki: 24VDC

7. Kare juriya:

(1) al'ada zafin jiki rufi juriya: Lokacin da kewaye iska zafin jiki ne 15 ~ 35 ℃ da kuma dangi zafi kasa da 80%, da rufi juriya tsakanin thermocouple zazzabi sassa da kariya bututun ba kasa da 100MΩ.

(2) High zafin jiki rufi juriya: lokacin da thermocouple a 300 ~ 500 ℃, rufi juriya tsakanin zafin jiki abubuwa da kariya bututun ba kasa da 2 MΩ.

8. Amfani da yanayin muhalli kamar haka:

a matsin lamba na yanayi 80 ~ 110kPa;

b yanayin zafin jiki: -20 ~ 40 ℃;

c Matsakaicin zafi na muhalli ba ya fi 80% (+ 25 ℃);

d wuraren da ke da gas mai ƙonewa na yanki 1, yanki 2 na IIA, IIB, IIC, T1 ~ T6, ko kuma haɗin fashewa na tururi da iska;

e a cikin yanayin da gas ko tururi ba tare da lalacewa;

f a wuraren da babu girgizawa da girgizawa mai mahimmanci;

Tsarin thermocouple mai fashewa ya ƙunshi sassa huɗu na ɓangarorin haɗin zafin jiki, akwatin haɗin waya, bututun kariya, da na'urar haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗ

1. Temperature sassa Components

Wannan samfurin zazzabi sensing bangare ya ƙunshi thermal lantarki, biyan kuɗi wayoyi, yumbu rufi bututu, wiring wurin zama, da sauransu.

2. Akwatin

Matsayin akwatin da rufin akwatin an yi su ne da kayan aiki na aluminum wanda ba ya fi 7.5% na magnesium da titanium (ta hanyar kashi na inganci) da ƙarfin jawo fiye da 120N / mm2, wanda aka haɗa tsakanin su ta hanyar ƙirar ƙirar ƙirar ƙirar ƙirar ƙirar ƙirar ƙirar ƙirar ƙirar ƙirar ƙira. Bayan shigarwa daga waje wayar, ya kamata tighten akwatin rufi. Bayan an yi amfani da shi, an hana buɗewar akwatin kafin ba a yanke wutar lantarki ba. Haɗa junction saman tsakanin akwatin da kariya bututun da threaded burst insulation. Akwatin yana amfani da na'urar gabatarwa ta hanyar matsa lamba, ya kamata a yi amfani da kebul mai dacewa, don haka ƙididdigar ƙididdigar na'urar zai iya ƙididdigar da kebul, ba za a iya bar rami ba.

3. Kare tubu

Duk an yi da bakin karfe, tare da kyakkyawan zafi juriya, lalata juriya da kuma isa inji ƙarfi.

Wannan samfurin kare bututun zane shigar da zurfin 150mm, ban da wannan mai amfani zai iya gabatar da takamaiman girma kamar yadda ake bukata.

4. Shigar da na'urar

Shigar da kayan aiki shine nau'in kwalliya ko nau'in flange, musamman duba Hoto WR.008.1-2.

Shigarwa da Amfani

1. Zaɓin thermocouple mai fashewa

Mai amfani da daidai zabin fashewa-resistant kayan aiki ne daya daga cikin muhimman sharuɗɗa don tabbatar da masana'antu lafiya, a lokaci guda kuma dangane da ko kayan aiki na tattalin arziki da amfani.

(1) Ka'idar Zaɓi:

Zaɓin mai amfani da thermocouple mai fashewa dole ne ya dace da matakin, rukunin, da rarraba yankin haɗari na cakuda mai fashewa a filin auna zafi.

(2) Alamar fashewa

Alamar fashewa ta wannan samfurin ita ce Ex d IIC T6 Gb.

2. Shigarwa bukatun:

Shigarwa a wurin wannan samfurin dole ne ya dace da ƙa'idodin GB3836.15-2000 "Kayan aikin lantarki don muhallin fashewa na gas Sashe na 15: Shigarwa na lantarki a wuraren haɗari (ban da ma'adinai na kwal).

Wurin shigarwa na thermocouple ya kamata a kauce wa shigarwa kusa da ƙofar murya da nesa da abubuwan dumama. Akwatin junction na thermocouple ba zai iya taɓa bangon kwantena na kafofin watsa labarai da aka gwada ba, ya kamata a shigar da shi a wurin da ya sa akwatin junction ya zama mai iska. The junction akwatin fitarwa rami na thermocouple ya kamata a kasa, da ruwa, ƙura da sharar gida da sauransu fadi a cikin rami.

3. wayoyi:

Wire akwatin yana da ciki da waje ƙasa dungulla, don tabbatar da aminci, alama a lokacin shigarwa "

Gabatar da kebul ya kamata ya yi amfani da keɓaɓɓen (mafi kyau kariya) wayar jan ƙarfe, da kebul waje diamita ya kamata ya dace da hatimi zoben, da jan ƙarfe yankin ya dogara da nesa tsakanin thermocouple da biyu na'urar, amma ba za a iya kasa da 1.5mm2, da wayar juriya darajar ya kamata a bayar da bayanai da aka tsara da fasaha yanayin biyu na'urar (yawanci 5Ω).

4. Amfani da fashewa insulation thermocouple:

Aikace-aikacen thermocouple don auna zafin jiki, shigar da thermocouple a wurin da aka gwada, bayan wani lokaci, za a iya auna ainihin zafin jiki na wurin da aka gwada. Don rage zafi gudanarwa da kuma zafi musayar da aka gwada da waje, ya kamata a kara gwada kafofin watsa labarai sake zagayowa, a karkashin aiki matsin lamba izini yanayi, kokarin kara convection zafi watsa tsakanin thermocouple da kuma gwada kafofin watsa labarai; Ƙara zurfin shigar da thermocouple. A lokacin amfani, thermocouple ya kamata ya yi aiki tare da biyu na'urorin da suka dace, don nunawa da sarrafa zafin jiki daidai, ba ya kamata a haɗa thermocouple tare da biyu na'urorin biyu a lokaci guda.

5. Amfani da lura:

(1) Bincika ko akwai alamar fashewa da lambar takardar shaidar fashewa a bayyane.

(2) Bincika ko kayayyakin suna da lalacewar inji a kowane ɓangare na jigilar kaya, tsarin shigarwa da sauransu, musamman fashewa mai haɗuwa da fashewa, ba za a iya lalacewa ba. Idan akwai lalacewa, relaxation iya shafar fashewa-resistant aiki.

(3) Bincika ko nau'ikan fashewa na samfurin, rukunin zafin jiki, yankin amfani ya dace da buƙatun wurin amfani da wurin haɗin gas mai fashewa.

(4) Akwai wani ciki da waje ƙasa dunƙule da alama.

(5) An haramta canja sassan da suka shafi fashewa don tabbatar da aikin fashewa.

(6) An haramta wutar lantarki a wuraren haɗari, dole ne a kashe samar da wutar lantarki na thermocouple kafin a buɗe murfin. Kammala shigarwa ya kamata duba ba tare da kuskure ba, ƙarfafa akwatin rufi, bayan da aka iya amfani da wutar lantarki a kan mai kyau akwatin rufi.

(7) cirewa ko maye gurbin thermocouple dole ne a cire ko maye gurbin lokacin da zafin jiki na shigar da sassa ya rage zuwa kasa da 80 ° C ko kasa da iyakar zafin jiki da aka yarda a karkashin wannan yanayin amfani.