Shenhai bugbamu-Imudaniloju
Isamisi-ẹri bugbamu ni awọn imuduro ina-ẹri bugbamu jẹ aami ti o ṣapejuwe ite-ẹri bugbamu, ẹgbẹ otutu, iru, ati awọn agbegbe ti o wulo ti imuduro ina.
Apejuwe ti Bugbamu-ẹri Siṣamisi:
Gẹgẹbi GB 3836 awọn ajohunše, awọn bugbamu-ẹri siṣamisi ti ina amuse pẹlu:
Bugbamu-ẹri Iru + Ẹka ẹrọ + (Gaasi Ẹgbẹ) + Ẹgbẹ otutu.
1. Bugbamu-ẹri Iru:
Tabili 1 Basic Types of Explosion-Proof
| Explosion proof form | Explosion proof form sign | Explosion proof form | Explosion proof form sign |
|---|---|---|---|
| Flameproof iru | EX d | Sand filled type | EX q |
| Alekun iru ailewu | EX e | Encapsulation | EX m |
| Barotropic type | EX p | N-iru | EX n |
| Irisi ailewu inu inu | EX ia EX i | Special type | EX s |
| Epo ayabo iru | EX o | Dust explosion-proof type | EX A EX B |
2. Ẹka ẹrọ:
Electrical equipment for bugbamu gas atmospheres is divided into:
Kilasi I: For use in coal mines;
Kilasi II: For use in explosive gas atmospheres other than coal mines.
Class II explosion-proof “d” ati ailewu ojulowo “i” electrical equipment are further divided into IIA, IIB, and IIC classes.
Electrical equipment for eruku ijona environments is divided into:
Type A dust-tight equipment; Type B dust-tight equipment;
Type A dust-proof equipment; Type B dust-proof equipment.
3. Apejuwe ti Bugbamu-ẹri Siṣamisi:
The ability of an explosive gas mixture to propagate an explosion indicates its level of explosion hazard. The greater the ability to propagate an explosion, the higher the danger. This ability can be represented by the maximum experimental safe gap. Ni afikun, the ease with which explosive gases, vapors, or mists can be gbina also indicates the level of explosion hazard, represented by the minimum igniting current ratio. Class II explosion-proof or intrinsic safety electrical equipment is further classified into IIA, IIB, and IIC based on their applicable maximum experimental safe gap or minimum igniting current ratio.
Tabili 2 Relationship between the Group of Explosive Gas Mixtures and the Maximum Experimental Safe Gap or Minimum Igniting Current Ratio
| Gaasi ẹgbẹ | Aafo ailewu idanwo ti o pọju MESG (m m) | Ipin ina lọwọlọwọ MICR ti o kere julọ |
|---|---|---|
| IIA | MESG≥0.9 | MICR：0.8 |
| IIB | 0.9＞MESG≥0.5 | 0.8≥MICR≥0.45 |
| IIC | 0.5≥MESG | 0.45MICR |
4. Ẹgbẹ otutu:
Awọn iginisonu otutu of an explosive gas mixture is the limit temperature at which it can be ignited.
Electrical equipment is classified into T1 to T6 groups based on their highest surface temperature, ensuring that the maximum surface temperature of the equipment does not exceed the permissible value of the corresponding temperature group. The relationship between temperature groups, equipment surface temperature, and the ignition temperature of flammable gases or vapors is shown in Table 3.
Tabili 3 Relationship between Temperature Groups, Equipment Surface Temperature, and Ignition Temperature of Flammable Gases or Vapors
| Iwọn otutu IEC/EN/GB 3836 | Iwọn otutu ti o ga julọ ti ẹrọ T [℃] | Lgnition otutu ti combustible oludoti [℃] |
|---|---|---|
| T1 | 450 | T 450 |
| T2 | 300 | 450≥T 300 |
| T3 | 200 | 300≥T 200 |
| T4 | 135 | 200≥T 135 |
| T5 | 100 | 135≥T 100 |
| T6 | 85 | 100≥T：8 |
5. Requirements for Setting Markings:
(1) Markings should be prominently placed on the main body of the electrical equipment;
(2) The markings must remain clear and durable under potential chemical corrosion. Markings such as Ex, bugbamu-ẹri iru, ẹka, and temperature group can be embossed or debossed on the visible parts of the casing. The material for the marking plate should be chemically resistant, such as bronze, idẹ, tabi irin alagbara.