依客(ke)思(si)全(quan)新(xin)打(da)造(zao)防(fang)爆原理（中英文(wen)對(dui)照(zhao)版(ban)）

樂清(qing)市依客(ke)思(si)林(lin)芝(zhi)經過幾天的(de)整理,新(xin)的(de)防爆(bao)小常識(shi)終於(yu)出(chu)爐了,請(qing)大(da)家好好瀏(liu)覽(lan),有(you)啥問(wen)題可(ke)以隨時!,防(fang)止(zhi)爆炸(zha)的(de)產生(sheng)必從三(san)個(ge)必要條(tiao)件來考(kao)慮(lv)，限(xian)制了其(qi)中(zhong)的(de)壹個(ge)必要條(tiao)件，就(jiu)限(xian)制了爆(bao)炸(zha)的(de)產生(sheng)。在工(gong)業(ye)過程(cheng)中(zhong)，通(tong)常(chang)從下(xia)述三(san)個(ge)方面(mian)著(zhe)手(shou)對(dui)易燃易爆(bao)場合進行處理：（1） 預防或(huo)大限(xian)度(du)地降(jiang)低易燃物質(zhi)泄漏(lou)的(de)可能(neng)性；（2） 不(bu)用或(huo)盡量少(shao)用易產(chan)生(sheng)電火花(hua)的(de)電所元(yuan)件；（3） 采取(qu)充(chong)氮氣之(zhi)類(lei)的(de)方法(fa)維持惰(duo)性狀(zhuang)態

壹、危險場所(suo)區(qu)域(yu)劃分

    危險場所(suo)區(qu)域(yu)的(de)含義(yi)，是對該地(di)區(qu)實(shi)際(ji)存(cun)在危險可能(neng)性的(de)量度(du)，由(you)此規(gui)定(ding)其(qi)可(ke)適用(yong)的(de)防爆(bao)型(xing)式(shi)。電工(gong)委(wei)員(yuan)會(hui)/歐洲(zhou)電工(gong)委(wei)員(yuan)會(hui)劃分的(de)防爆(bao)區(qu)域(yu)為(wei)：
    0區(qu)：連續(xu)地存(cun)在危險性大(da)於(yu)1000小時/每(mei)年(nian)的(de)區(qu)域(yu)；
    1區(qu)：斷續地(di)存在危險性10~1000小時/每(mei)年(nian)的(de)區(qu)域(yu)；
    2區(qu)：事故(gu)狀(zhuang)態下(xia)存(cun)在的(de)危險性0.1~10小時/每(mei)年(nian)的(de)區(qu)域(yu)；
中(zhong)劃分的(de)有(you)效區(qu)域(yu)和以上相同(tong)。

二、防爆標(biao)誌解(jie)析(xi)

  ①氣體組別
典 型(xing) 的(de)
危險性
氣  體歐洲(zhou)電工(gong)
標(biao)準化(hua)委員(yuan)會(hui)
EN50014EC北  美(mei)
NEC500條款
CLASS1表(biao)氣中(zhong) 
GB-3836-1小點(dian)燃能(neng)量
（微  焦(jiao)）
乙(yi)  炔ⅡCAⅡC20
氫(qing)  氣ⅡCAⅡC20
乙(yi)  烯ⅡBCⅡB60
丙  烷(wan)ⅡADⅡA180
  註(zhu):中(zhong)GB3836標(biao)準規(gui)定(ding)ⅡC小點(dian)燃能(neng)量為19微(wei)焦(jiao)耳(er),ⅡA小點(dian)燃能(neng)量為200微(wei)焦(jiao)
     耳(er)。
    氣體分組和點(dian)燃溫度(du),在壹(yi)定(ding)環(huan)境(jing)溫度(du)和壓(ya)力下(xia)與(yu)可燃性(xing)氣體和空(kong)氣的(de)混合濃(nong)度(du)有(you)關(guan)。

  ②溫度(du)組別（T組）
    這是與(yu)氣體點(dian)燃溫度(du)有(you)關(guan)的(de)電氣設(she)備（假(jia)定(ding)環(huan)境(jing)溫度(du)為40℃時）的(de)高(gao)表(biao)面(mian)溫度(du)，點(dian)燃能(neng)量與(yu)點(dian)燃溫度(du)無(wu)關。在標(biao)準BS5345*部分中(zhong)列出了所(suo)有(you)可(ke)燃性(xing)氣體和其(qi)組別。
高(gao)表(biao)面(mian)溫度(du)（℃）溫度(du)組別
 IEC79-8GB3836-1
450℃T1T1
300℃T2T2
200℃T3T3
135℃T4T4
100℃T5T5
85℃T6T6

  ③防爆(bao)標(biao)誌
    以下(xia)以CENELEC氫(qing)氣防(fang)爆標(biao)誌為(wei)例(li)：E Ex ia ⅡC T4
E：按(an)CENELEC標(biao)誌認可Ex：防(fang)爆公(gong)用標(biao)誌
ia：防(fang)爆型(xing)式(shi)（本(ben)質(zhi)安全）Ⅱ：設(she)備組別
C：氣體組別 T4：溫度(du)組別

  ④名詞解(jie)釋(shi)

    隔(ge)爆型(xing)電氣設(she)備（d）：是指把能(neng)點(dian)燃爆(bao)炸(zha)性(xing)混合物的(de)部件封閉在壹(yi)個(ge)外殼(ke)內(nei)，該外殼(ke)能(neng)承受內部爆(bao)炸(zha)性(xing)混合物的(de)爆炸(zha)壓(ya)力並(bing)阻止(zhi)和周(zhou)圍(wei)的(de)爆炸(zha)性(xing)混合物傳(chuan)爆的(de)電氣設(she)備。

    增(zeng)安型(xing)電氣設(she)備（e）：正(zheng)常(chang)運(yun)行條件下(xia)，不(bu)會(hui)產生點(dian)燃爆(bao)炸(zha)性(xing)混合物的(de)火花(hua)或(huo)危險溫度(du)，並(bing)在結構上采(cai)取(qu)措施(shi)，提(ti)高(gao)其(qi)安全程(cheng)度(du)， 以避(bi)免(mian)在正(zheng)常(chang)和規(gui)定(ding)過載(zai)條(tiao)件下(xia)出(chu)現(xian)點(dian)燃現(xian)象的(de)電氣設(she)備。

    本(ben)質(zhi)安全型(xing)電氣設(she)備（i）：在正(zheng)常(chang)運(yun)行或(huo)在標(biao)準試驗(yan)條件下(xia)所(suo)產(chan)生(sheng)的(de)火花(hua)或(huo)熱效應均(jun)不(bu)能(neng)點(dian)燃爆(bao)炸(zha)性(xing)混合物的(de)電氣設(she)備。

    無(wu)火花(hua)型(xing)電氣設(she)備 （n）： 在正(zheng)常(chang)運(yun)行條件下(xia)不(bu)產生(sheng)電弧(hu)或(huo)火花(hua)，也(ye)不(bu)產生(sheng)能(neng)夠點(dian)燃周(zhou)圍(wei)爆(bao)炸(zha)性(xing)混合物的(de)高(gao)溫表(biao)面(mian)或(huo)灼(zhuo)熱點(dian)，且壹(yi)般不(bu)會(hui)發生有(you)點(dian)燃作(zuo)用的(de)故(gu)障的(de)電氣設(she)備。

    防(fang)爆(bao)特(te)殊型(xing)（s）： 電氣設(she)備或(huo)部件采用(yong)GB3836-83未(wei)包括的(de)防爆(bao)型(xing)式(shi)時(shi)，由(you)主(zhu)管部門制訂(ding)暫(zan)行規定(ding)。送勞(lao)動(dong)人(ren)事部備(bei)案(an)，並(bing)經的(de)鑒定(ding)單位檢驗(yan)後，按(an)特殊電氣設(she)備"s"型(xing)處(chu)置(zhi)。

三(san)、防(fang)爆標(biao)準及(ji)選(xuan)型(xing)

  ①各種防(fang)爆(bao)型(xing)式(shi)的(de)對應標(biao)準

防(fang)爆型(xing)式(shi)在英允(yun)許(xu)
使用(yong)的(de)場所(suo)中(zhong)標(biao)準
GB3836防(fang)爆型(xing)式(shi)
符(fu)  號IEC標(biao)準
79-CENELEC標(biao)準
EN50
增(zeng)安型(xing)1或(huo)23e7019
本(ben)質(zhi)安全型(xing)0，1或(huo)24ia或(huo)ib11020（設備(bei)）
隔(ge)爆型(xing)d2d1018
特(te)殊(shu)型(xing)s無(wu)s無(wu)無(wu)

  ②氣體爆(bao)炸(zha)危險場所(suo)用(yong)電氣設(she)備防(fang)爆(bao)類(lei)型(xing)選(xuan)型(xing)表(biao)

爆(bao)炸(zha)危險區(qu)域(yu)適(shi)用的(de)防護(hu)型(xing)式(shi)
電氣設(she)備類(lei)型(xing)符(fu)  號
0區(qu)1、本(ben)質(zhi)安全型(xing)（ia）ia
 2、其(qi)他(ta)特別為0區(qu)設計(ji)的(de)電氣設(she)備（特(te)殊(shu)型(xing)）s
 1、適(shi)用(yong)於(yu)0區(qu)的(de)防護(hu)類(lei)型(xing) 
 2、隔(ge)爆型(xing)d
 3、增(zeng)安型(xing)e
1區(qu)4、本(ben)質(zhi)安全型(xing)ib
 5、充(chong)油型(xing)o
 6、正(zheng)壓(ya)型(xing)p
 7、充(chong)砂(sha)型(xing)q
2區(qu)1、適用(yong)於0區(qu)或(huo)1區(qu)的(de)防護(hu)類(lei)型(xing) 
 2、無(wu)火花(hua)型(xing)n

四(si)、外殼(ke)防(fang)護等（IP）代(dai)碼(ma)
    （BS EN60529；1992）

  *位特(te)征數(shu)字防止固定(ding)導(dao)體異物進入(ru)
0無(wu)防護(hu)
1固定(ding)異物直徑大於50mm
2固定(ding)異物直徑大於12mm
3固定(ding)異物直徑大於2.5mm
4固定(ding)異物直徑大於1.0mm
5防塵(chen)
6塵(chen)密(mi)

  第二位特征數(shu)字防止進水造(zao)成(cheng)有(you)害(hai)影響
0無(wu)防護(hu)
1垂直滴(di)水
2傾(qing)角(jiao)75-90°滴(di)水
3淋(lin)水
4濺水
5噴水
6猛(meng)烈(lie)噴水
7短時間(jian)侵(qin)水
8連續侵(qin)水

舉例(li)：IP 65即要求(qiu)具(ju)有(you)塵(chen)密(mi)及對外殼(ke)噴水有(you)防(fang)護(hu)功(gong)能(neng)

A zoning, dangerous places

Dangerous locations of meaning, a measure of the likelihood is a real danger to the region, the provisions of the applicable explosion-proof type. International electrotechnical commission/European electrotechnical commission of explosion-proof area as follows:

0 area: continuously hazardous region of greater than 1000 hours/year;

1 area: there is risk in an intermittent 10 ~ 1000 hours/year area;

2 area: the risk of accident situation is 0.1 ~ 10 hours/year area;

Dividing the effective area of China is the same as the above.

Second, explosion-proof marks parsing

（1） gas group

Canon model

The risk

Gas electrician in Europe

Committee for standardization

EN50014EC North America

NEC500 terms

CLASS1 table in China

GB - 3836-1 minimum ignition energy

（micro）

B acetylene Ⅱ CA Ⅱ C20

Hydrogen gas Ⅱ CA Ⅱ C20

B ene Ⅱ BC Ⅱ B60

Propyl silane Ⅱ AD Ⅱ A180

Note: China GB3836 standard Ⅱ c-class 19 micro joule, minimum ignition energy Ⅱ class A minimum ignition energy of 200 micro focus

Ear.

Gas group and light temperature, in a certain environment temperature and pressure is associated with the mixed concentration of combustible gas and air.

（2） temperature group （T group）

This is related to gas ignited temperature electrical equipment （assuming the environment temperature of 40 ℃） of the surface of the highest temperature, the light energy has nothing to do with the set temperature. In the first part of the standard BS5345 lists all combustible gas and its category.

Temperature of the maximum surface temperature （℃） group

IEC79-8 gb3836-1

450 ℃ T1T1

300 ℃ T2T2

200 ℃ T3T3

135 ℃ T4T4

100 ℃ T5T5

85 ℃ T6T6

（3） explosion-proof marks

The following sign CENELEC hydrogen explosion, for example: E Ex ia Ⅱ C T4

E: approved by CENELEC logo Ex: explosion-proof public signs

Ia: explosion-proof type （intrinsically safe） Ⅱ: equipment category

C: T4 gas group: temperature classes

（4） noun explanation

Flameproof electrical equipment （d） : refers to can ignite an explosive mixture of the components are enclosed in a shell, the shell can withstand the internal pressure and prevent explosion of explosive mixture and detonating an explosive mixture around electrical equipment.

Increased safety electrical equipment （e） : under the condition of normal operation, won't produce sparks ignite an explosive mixture or dangerous temperature, and measures in the structure, to improve the safety degree, so as to avoid overload conditions prescribed by the normal and phenomenon of lighting electric equipment.

Intrinsically safe electrical equipment: （I） in normal operation or under standard test conditions spark or heat effect generated by the mixture can ignite an explosive electric equipment.

No spark type electrical equipment （n） : under the condition of normal operation does not produce electric arc or spark, also does not produce around can ignite an explosive mixture of the surface of the high temperature or hot point, and generally do not have lighting effect of failure of electrical equipment.

Explosion-proof special type （s） : electrical equipment or components the GB3836-83 not including explosion-proof type, provisional rules drawn up by the competent departments. To send labor personnel department for the record, and after identification unit designated by the test, according to the special electrical equipment "s" type.

Three, explosion-proof standards and selection

（1） all kinds of explosion-proof types of corresponding standards

Explosion-proof type allowed in the UK

Place of use Chinese standard

GB3836 explosion-proof type

Operator, IEC standard

79 - CENELEC standards

EN50

Increased safety type 1 or 23 e7019

Intrinsically safe 0, 1 or 24 ia or ib11020 （equipment）

Flameproof d2d1018

S no s no special type

（2） gas explosion for the dangerous sites with explosion-proof electrical equipment type selection table

Suitable protective type explosion danger area

Electrical equipment type descriptor

Area 0 1, intrinsically safe （ia） ia

2, other electrical equipment specially designed for zero area （special） s

1, applies to the protection type in 0

2, flameproof d

3, increase safety type e

4, intrinsically safe ib 1 area

5, oil-filled type o

6, type positive pressure p

7, sand mold filling q

2 area 1, applies to 0 area or zone 1 protection type

2, no spark, n

Four, enclosure protection class （IP） code

（BS EN60529; 1992）

The first characteristic digital fixed conductor to prevent foreign matter into the

0 no protection

1 fixed foreign body diameter greater than 50 mm

2 fixed foreign material is greater than 12 mm in diameter

3 fixed foreign material is greater than 2.5 mm in diameter

4 fixed foreign material is greater than 1.0 mm in diameter

5 dust

6 dust tight

The second characteristic Numbers to prevent harmful impacts into water

0 no protection

1 vertical drop of water

2 inclination of 75-90 ° dripping water

3 water spray

4, splashed water

Five water spray

6 heavy water spray

Contamination of water 7 a short time

Eight consecutive inundation

Example: IP 65 requiring have dust and water protection function of enclosure

意見(jian)與(yu)反饋