{"id":2114,"date":"2025-03-01T10:36:01","date_gmt":"2025-03-01T02:36:01","guid":{"rendered":"https:\/\/led.amasly.com\/?p=2114"},"modified":"2025-03-07T21:26:35","modified_gmt":"2025-03-07T13:26:35","slug":"explosion-proof-plugging-parts-related-knowledge","status":"publish","type":"post","link":"https:\/\/led.amasly.com\/cs\/explosion-proof-equipment\/explosion-proof-plugging-parts-related-knowledge\/","title":{"rendered":"Znalosti t\u00fdkaj\u00edc\u00ed se nev\u00fdbu\u0161n\u00fdch z\u00e1suvn\u00fdch d\u00edl\u016f"},"content":{"rendered":"

Souvisej\u00edc\u00ed znalosti o nev\u00fdbu\u0161n\u00fdch z\u00e1suvn\u00fdch d\u00edlech<\/strong><\/strong><\/h1>\n\n\n\n

V oblastech s nebezpe\u010d\u00edm po\u017e\u00e1ru a v\u00fdbuchu v chemick\u00fdch podnic\u00edch je pou\u017e\u00edv\u00e1n\u00ed nev\u00fdbu\u0161n\u00fdch elektrick\u00fdch za\u0159\u00edzen\u00ed b\u011b\u017enou prax\u00ed, aby bylo mo\u017en\u00e9 \u00fa\u010dinn\u011b kontrolovat jiskry vznikaj\u00edc\u00ed v elektrick\u00fdch za\u0159\u00edzen\u00edch, aby se zabr\u00e1nilo \u00faniku ho\u0159lav\u00fdch plyn\u016f z okol\u00ed do elektrick\u00e9ho za\u0159\u00edzen\u00ed uvnit\u0159 nehody zp\u016fsoben\u00e9 v\u00fdbuchem.<\/strong><\/p>\n\n\n\n

\"\"<\/a><\/figure><\/div>\n\n\n\n

Obecn\u00e9 po\u017eadavky na hlavn\u00ed sou\u010d\u00e1sti nev\u00fdbu\u0161n\u00e9ho za\u0159\u00edzen\u00ed<\/strong><\/strong><\/h2>\n\n\n\n

I. <\/strong>Spojovac\u00ed materi\u00e1l<\/strong><\/strong><\/h2>\n\n\n\n

1. Upev\u0148ovac\u00ed prvky by m\u011bly m\u00edt dostate\u010dnou mechanickou pevnost, aby p\u0159i v\u00fdbuchu n\u00e1bojnice nedo\u0161lo k prasknut\u00ed \u0161roubu.<\/p>\n\n\n\n

2, spojovac\u00ed materi\u00e1l by m\u011bl b\u00fdt antikorozn\u00ed, opat\u0159en\u00ed proti uvoln\u011bn\u00ed, aby se zajistilo, \u017ee v\u016fle roviny typu nev\u00fdbu\u0161n\u00e9ho povrchu kloubu.<\/p>\n\n\n\n

3\u3001P\u0159i upev\u0148ov\u00e1n\u00ed pomoc\u00ed \u0161roub\u016f, pokud jsou pou\u017eity pru\u017en\u00e9 podlo\u017eky proti uvoln\u011bn\u00ed, sta\u010d\u00ed pru\u017en\u00e9 podlo\u017eky zplo\u0161tit a nem\u011bly by b\u00fdt p\u0159\u00edli\u0161 uta\u017eeny.<\/p>\n\n\n\n

4. Aby nedo\u0161lo ke st\u0159ihu upev\u0148ovac\u00edch \u0161roub\u016f p\u016fsoben\u00edm vn\u011bj\u0161\u00edch sil, mus\u00ed b\u00fdt vn\u011bj\u0161\u00ed rozm\u011bry spoj\u016f krytu a pl\u00e1\u0161t\u011b stejn\u00e9.<\/p>\n\n\n\n

5, aby bylo upevn\u011bn\u00ed bezpe\u010dn\u00e9, nen\u00ed dovoleno pou\u017e\u00edvat materi\u00e1l \u0161roub\u016f a matic z plastu nebo lehk\u00e9 slitiny a nen\u00ed dovoleno klepat do otvor\u016f pro \u0161rouby p\u0159\u00edmo na plastov\u00e9m pl\u00e1\u0161ti.<\/p>\n\n\n\n

6, hloubka nepropustn\u00fdch otvor\u016f pro \u0161rouby by m\u011bla zajistit, aby otvory pro \u0161rouby a vruty po uta\u017een\u00ed byly v\u00edce ne\u017e 2n\u00e1sobkem tlou\u0161\u0165ky z\u00e1vitu pojistn\u00e9 podlo\u017eky.<\/p>\n\n\n\n

7. Tlou\u0161\u0165ka kolem nepropustn\u00e9ho otvoru pro \u0161roub a na jeho dn\u011b nesm\u00ed b\u00fdt men\u0161\u00ed ne\u017e jedna t\u0159etina pr\u016fm\u011bru \u0161roubu, av\u0161ak s rezervou nejm\u00e9n\u011b 3,0 mm.<\/p>\n\n\n\n

8, proces s pr\u016fchoz\u00edm otvorem nebo strukturou mus\u00ed proniknout do pl\u00e1\u0161t\u011b otvor\u016f pro \u0161rouby, m\u011bl by b\u00fdt v\u00e1lcov\u00fd nebo z\u00e1vitov\u00fd nev\u00fdbu\u0161n\u00fd objekt, kter\u00fd jej zapoj\u00ed, exponovan\u00fd konec mus\u00ed b\u00fdt trvale upevn\u011bn.<\/p>\n\n\n\n

II. <\/strong>Z\u00e1str\u010dky<\/strong><\/strong><\/h2>\n\n\n\n
\"\"<\/a><\/figure><\/div>\n\n\n\n

S ofici\u00e1ln\u00edm vyd\u00e1n\u00edm verze 2021 normy GB\/T3836 obohacuje GB\/T 3836.2-2021 po\u017eadavky na Ex blokovac\u00ed d\u00edly a rozd\u00edly oproti GB 3836.2-2010 jsou n\u00e1sleduj\u00edc\u00ed:<\/p>\n\n\n\n

1.GB 3836.2-2010 \u010cl\u00e1nek 11 pro \u201cspojovac\u00ed materi\u00e1l, souvisej\u00edc\u00ed otvory a blokovac\u00ed d\u00edly\u201d, GB\/T 3836.2-2021 v 11 odstranil blokovac\u00ed d\u00edly, v 13.8 samostatn\u00e1 ustanoven\u00ed po\u017eadavk\u016f na blokovac\u00ed d\u00edly a blokovac\u00ed d\u00edly konstruk\u010dn\u00edch po\u017eadavk\u016f \u010dl\u00e1nku C2.3.1.<\/p>\n\n\n\n

2.GB\/T 3836.2-2021 Dodatek C.2.3 se podle sv\u00fdch konstruk\u010dn\u00edch vlastnost\u00ed d\u011bl\u00ed na metrick\u00e9 d\u00edly pro z\u00e1tky, d\u00edly pro z\u00e1tky NPT a d\u00edly bez z\u00e1vit\u016f pro z\u00e1tky s jasn\u00fdmi po\u017eadavky, konkr\u00e9tn\u00ed obsah je n\u00e1sleduj\u00edc\u00ed:<\/p>\n\n\n\n

(1) Metrick\u00e9 blokovac\u00ed prvky Ex mus\u00ed spl\u0148ovat n\u00e1sleduj\u00edc\u00ed po\u017eadavky, aby bylo mo\u017en\u00e9 \u0159e\u0161it zaveden\u00ed otvor\u016f do sk\u0159\u00edn\u011b t\u00edm, \u017ee vn\u011bj\u0161\u00ed povrch blokovac\u00edho prvku bude co nejbl\u00ed\u017ee sk\u0159\u00edni:<\/p>\n\n\n\n

a. Mus\u00ed m\u00edt p\u0159\u00edruby nebo dut\u00e9 no\u017ee, kter\u00e9 zabra\u0148uj\u00ed tomu, aby blokovac\u00ed prvek Ex zcela pro\u0161el sk\u0159\u00edn\u00ed, a pokud jsou p\u0159\u00edruby p\u0159\u00edtomny, mus\u00ed m\u00edt pr\u016fm\u011br a tlou\u0161\u0165ku, kter\u00e9 zabra\u0148uj\u00ed odstran\u011bn\u00ed jin\u00fdmi ne\u017e v\u00fd\u0161e povolen\u00fdmi zp\u016fsoby;<\/p>\n\n\n\n

b. Z\u00e1vity mus\u00ed odpov\u00eddat p\u0159\u00edslu\u0161n\u00fdm po\u017eadavk\u016fm uveden\u00fdm v \u010d\u00e1sti Nev\u00fdbu\u0161n\u00e9 spoje (C.2.2).<\/p>\n\n\n\n

(2) \u010clenov\u00e9 NPT Ex blocking mus\u00ed spl\u0148ovat n\u00e1sleduj\u00edc\u00ed po\u017eadavky:<\/p>\n\n\n\n

a. Mus\u00ed b\u00fdt bez p\u0159\u00edrub;<\/p>\n\n\n\n

b. Typy z\u00e1vit\u016f mus\u00ed odpov\u00eddat norm\u011b ANSI\/ASME B1.20.1 American Standard Tapered Pipe Threads (NPT);<\/p>\n\n\n\n

c. M\u011bly by zde b\u00fdt dr\u00e1\u017eky pro n\u00e1stroje (jako na obr\u00e1zku C.2);<\/p>\n\n\n\n

d. Efektivn\u00ed d\u00e9lka z\u00e1vitu nesm\u00ed b\u00fdt men\u0161\u00ed ne\u017e rozm\u011br \u201cL2\u201d.<\/p>\n\n\n\n

(3) Z\u00e1str\u010dky Ex bez z\u00e1vitu (pouze typ I)<\/p>\n\n\n\n

Pouze u za\u0159\u00edzen\u00ed t\u0159\u00eddy I mus\u00ed blokovac\u00ed d\u00edly s lehk\u00fdm otvorem (bez z\u00e1vitu) spl\u0148ovat po\u017eadavky bod\u016f C.2.2.2 a C.2.3.1 v norm\u011b GB\/T3836.2-2021.<\/p>\n\n\n\n

Zvl\u00e1\u0161tn\u00ed pozornost by m\u011bla b\u00fdt v\u011bnov\u00e1na:<\/p>\n\n\n\n

(1) Z\u00e1tky by se nem\u011bly pou\u017e\u00edvat se z\u00e1vitov\u00fdmi armaturami.<\/p>\n\n\n\n

(2) Z\u00e1vitov\u00e9 z\u00e1tky NPT by nem\u011bly b\u00fdt konstruov\u00e1ny s p\u0159\u00edrubovou konstrukc\u00ed.<\/p>\n\n\n\n

B\u011b\u017en\u011b pou\u017e\u00edvan\u00e1 nev\u00fdbu\u0161n\u00e1 elektrick\u00e1 za\u0159\u00edzen\u00ed se p\u0159i zav\u00e1d\u011bn\u00ed metod zapojov\u00e1n\u00ed nepou\u017e\u00edvaj\u00ed.<\/strong><\/strong><\/h2>\n\n\n\n

Ohnivzdorn\u00e9 elektrick\u00e9 za\u0159\u00edzen\u00ed se nepou\u017e\u00edv\u00e1 p\u0159i zav\u00e1d\u011bn\u00ed \u00fast\u00ed, podle jeho zaveden\u00ed struktury vstupu k ur\u010den\u00ed zp\u016fsobu blokov\u00e1n\u00ed, n\u00e1sleduj\u00edc\u00ed je b\u011b\u017en\u011b pou\u017e\u00edv\u00e1n pro ohnivzdorn\u00e9 elektrick\u00e9 za\u0159\u00edzen\u00ed se nepou\u017e\u00edv\u00e1 p\u0159i zav\u00e1d\u011bn\u00ed \u00fast\u00ed metody blokov\u00e1n\u00ed, stru\u010dn\u011b analyzovat a vysv\u011btlit.<\/p>\n\n\n\n

N\u00e1rodn\u00ed norma GB\/T 3836.1-2021 \u010cl\u00e1nek 16.4 \u201cblokovac\u00ed d\u00edly<\/strong>\u201d je stanoveno takto: pou\u017e\u00edv\u00e1 se k blokov\u00e1n\u00ed nadbyte\u010dn\u00fdch otvor\u016f ve st\u011bn\u011b pl\u00e1\u0161t\u011b blokovac\u00edch \u010d\u00e1st\u00ed elektrick\u00e9ho za\u0159\u00edzen\u00ed, mus\u00ed b\u00fdt v souladu s po\u017eadavky p\u0159\u00edslu\u0161n\u00e9ho zvl\u00e1\u0161tn\u00edho nev\u00fdbu\u0161n\u00e9ho typu.<\/p>\n\n\n\n

Obvykle se konstrukce vstupn\u00edho otvoru nev\u00fdbu\u0161n\u00e9ho elektrick\u00e9ho za\u0159\u00edzen\u00ed d\u011bl\u00ed na dva p\u0159\u00edpady:<\/p>\n\n\n\n

1. Na nev\u00fdbu\u0161n\u00e9m krytu je um\u00edst\u011bno za\u0159\u00edzen\u00ed pro zaveden\u00ed kabelu s t\u011bsnic\u00edm krou\u017ekem, kter\u00e9 pou\u017e\u00edv\u00e1 t\u011bsnic\u00ed krou\u017eek k upnut\u00ed pl\u00e1\u0161t\u011b kabelu;<\/p>\n\n\n\n

2. Vstupn\u00ed otvor na nev\u00fdbu\u0161n\u00e9m krytu je nev\u00fdbu\u0161n\u00fd z\u00e1vitov\u00fd pr\u016fchoz\u00ed otvor, kter\u00fd je t\u0159eba ut\u011bsnit vhodnou nev\u00fdbu\u0161nou z\u00e1tkou.<\/p>\n\n\n\n

Za prv\u00e9, praxe prvn\u00edho p\u0159\u00edpadu, \u201cZa\u0159\u00edzen\u00ed pro zaveden\u00ed kabelu s t\u011bsnic\u00edm krou\u017ekem na nev\u00fdbu\u0161n\u00e9m krytu<\/strong>\u201c je zn\u00e1zorn\u011bn na obr\u00e1zku 1 n\u00ed\u017ee:<\/p>\n\n\n\n

\"\"<\/a><\/figure><\/div>\n\n\n\n

Struktura tohoto druhu zav\u00e1d\u011bc\u00edho otvoru spo\u010d\u00edv\u00e1 ve vytvo\u0159en\u00ed deformace t\u011bsnic\u00edho krou\u017eku stla\u010den\u00edm t\u011bsnic\u00edho krou\u017eku p\u0159es kompresn\u00ed prvek na \u010dele za\u0159\u00edzen\u00ed, tak\u017ee t\u011bsnic\u00ed krou\u017eek spolehliv\u011b sev\u0159e pl\u00e1\u0161\u0165 kabelu, aby se realizoval nev\u00fdbu\u0161n\u00fd v\u00fdkon, a neexistuje \u017e\u00e1dn\u00e1 struktura nev\u00fdbu\u0161n\u00e9ho povrchu. V tomto p\u0159\u00edpad\u011b se prov\u00e1d\u00ed metoda blokov\u00e1n\u00ed, jeho p\u0159ebyte\u010dn\u00fd otvor pro zaveden\u00ed kabelu na vn\u011bj\u0161\u00ed stran\u011b t\u011bsnic\u00edho krou\u017eku by m\u011bl b\u00fdt opat\u0159en ocelovou z\u00e1tkou\/z\u00e1suvnou deskou, p\u0159i\u010dem\u017e tlou\u0161\u0165ka z\u00e1suvn\u00e9 desky by nem\u011bla b\u00fdt men\u0161\u00ed ne\u017e 2 mm<\/strong>, m\u011bla by b\u00fdt ocelov\u00e1 z\u00e1tkov\u00e1 deska stla\u010dena p\u0159\u00edtla\u010dn\u00fdm prvkem, jak je zn\u00e1zorn\u011bno na obr\u00e1zku 1.<\/p>\n\n\n\n

Ve druh\u00e9m p\u0159\u00edpad\u011b je \u201cpr\u016fchoz\u00ed otvor v nev\u00fdbu\u0161n\u00e9m krytu<\/strong>\u201d je zobrazen na obr\u00e1zku 2 n\u00ed\u017ee:<\/p>\n\n\n\n

V tomto p\u0159\u00edpad\u011b je vstupn\u00edm otvorem na nev\u00fdbu\u0161n\u00e9m pl\u00e1\u0161ti pr\u016fchoz\u00ed otvor pro nev\u00fdbu\u0161n\u00e9 z\u00e1vity, kter\u00fd je t\u0159eba zablokovat vhodnou nev\u00fdbu\u0161nou z\u00e1tkou. Je t\u0159eba poznamenat, \u017ee nejprve je t\u0159eba ur\u010dit typ z\u00e1vitu, nap\u0159\u00edklad zda se jedn\u00e1 o z\u00e1vit NPT nebo z\u00e1vit M, p\u0159\u00edpadn\u011b jin\u00fd p\u0159\u00edpustn\u00fd typ z\u00e1vitu, a pot\u00e9 podle v\u00fdb\u011bru typu z\u00e1vitu vhodnou nev\u00fdbu\u0161nou z\u00e1tku, tato metoda z\u00e1tky je p\u0159es z\u00e1vitov\u00e9 rozhran\u00ed, aby se dos\u00e1hlo v\u00fdkonu nev\u00fdbu\u0161nosti, mus\u00ed tak\u00e9 spl\u0148ovat n\u00e1sleduj\u00edc\u00ed podm\u00ednky:<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

Rozte\u010d \u2265 0,7 mm, obvykle ne v\u00edce ne\u017e 2 mm;<\/p>\n\n\n\n

Zapojen\u00e9 z\u00e1vity \u2265 5 spon;<\/p>\n\n\n\n

Hloubka z\u00e1b\u011bru: \u2265 5 mm, pokud je objem za\u0159\u00edzen\u00ed \u2264 100 cm3, nebo \u2265 8 mm, pokud je objem za\u0159\u00edzen\u00ed > 100 cm3;<\/p>\n\n\n\n

P\u0159esnost zapojen\u00ed: Doporu\u010duje se st\u0159edn\u00ed nebo p\u0159esn\u00e1 \u00farove\u0148 tolerance podle GB\/T 197 a GB\/T 2516, 6H\/6g.<\/p>","protected":false},"excerpt":{"rendered":"

Explosion-proof plugging parts related knowledge In the fire and explosion hazardous areas of chemical enterprises, the use of explosion-proof electrical equipment is a common practice in order to effectively control the sparks generated by electrical equipment, to avoid the surrounding leakage of combustible gases into the electrical equipment inside the flash explosion accident. General requirements […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[8],"tags":[],"class_list":["post-2114","post","type-post","status-publish","format-standard","hentry","category-explosion-proof-equipment"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Joe","author_link":"https:\/\/led.amasly.com\/cs\/author\/jacklin\/"},"uagb_comment_info":0,"uagb_excerpt":"Explosion-proof plugging parts related knowledge In the fire and explosion hazardous areas of chemical enterprises, the use of explosion-proof electrical equipment is a common practice in order to effectively control the sparks generated by electrical equipment, to avoid the surrounding leakage of combustible gases into the electrical equipment inside the flash explosion accident. General requirements…","_links":{"self":[{"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/posts\/2114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/comments?post=2114"}],"version-history":[{"count":2,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/posts\/2114\/revisions"}],"predecessor-version":[{"id":2335,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/posts\/2114\/revisions\/2335"}],"wp:attachment":[{"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/media?parent=2114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/categories?post=2114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/tags?post=2114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}