Shenhai Explosion-Proof
Definition:
Te mau matini uira e tere na ni'a i te manureva, faaitehia mai e te tapa'o “d,” o te hoê ïa huru matarohia no te mau mauhaa tama'i. No te mau ahuru matahiti, ua riro te faanahoraa no te parururaa i te auahi ei ma'itiraa matamua i roto i te tupuraa e te faaohiparaa i te mau matini uira. E nehenehe e tiaturi i teie mau matini uira paruru i te auahi i roto i te mau paainaraa, te mau rave'a apî no te hamaniraa i te mau matini, e ia fana'o i te hoê oraraa tavini maoro. Te faaohipa-rahi-hia nei te reira i roto i te mau vahi atâta e te mau anoiraa e rave rahi no te mata'i rorofa'i. Tera râ,, no roto mai i te Te mau mana'o tauturu no te haapiiraa Te mau mana'o tauturu no te, e mea teiaha e e mea rahi roa teie mau matini.
Te parau tumu o te parururaa i te mau paainaraa:
Ua haapapûhia te parururaa e te tupitaraa o teie huru matini uira na roto i te hoê ofa'i tei parauhia te “Te feia e farii nei, a faaite mai.”
A “Aua no te parururaa i te auahi” e faati'a te reira i te mau anoiraa no te mata'i rorofa'i i roto i te combust e te Te mau mana'o tauturu no te inside the casing but prevents the explosion products from rupturing the casing or escaping through any passages to the exterior that could ignite the surrounding explosive mixtures. As long as the maximum surface anuvera of the enclosure does not exceed the temperature class for its intended group, the device will not become an ignition source for the surrounding explosive gas-air mixture.
This is how flameproof electrical equipment operates.
Understanding this principle, we can deduce that the casing of flameproof electrical equipment must have sufficient mechanical strength to withstand the explosion pressure generated inside without undergoing significant deformation or damage. The gaps between components of a flameproof enclosure, which form channels from the inside to the outside, must have appropriate mechanical dimensions that can reduce or even prevent the escape of explosion products. This way, ignition of the Te mau mana'o tauturu no te gas-air mixtures around the equipment is prevented. The explosion protection levels for flameproof electrical equipment are classified into three grades: IIA, IIB, e IIC. The protection levels of the equipment can also be categorized into three grades: a, b, e c, commonly represented in practice as: Equipment of Group I, Ma and Mb; Equipment of Group II, Ga, Gb, and Gc.
The enclosure of Te mau matini uira e tere na ni'a i te manureva should be made from materials with good mechanical strength, such as steel plate, auri i te auri, aluminum alloy, copper alloy, Te mau auri turi, e te mau matini hamani hoho'a. The strength and gap dimensions must comply with the relevant requirements of GB3836.2—2010 Explosive Atmospheres Part 2: Equipment protected by flameproof enclosures.