Explosion-proof smart phones, like personal computers, have an independent operating system, independent operating space, can be installed by the user's own software, games, navigation and other third-party service providers provided programs, and can achieve wireless network access to mobile phones through mobile communication networks, while obtaining coal safety or chemical explosion-proof certification, can be used in high-risk places such as mines, chemical plants A cell phone.

So why explosion-proof mobile phones can be used in dangerous places, according to National Explosive Environments Part 4: By intrinsically Safety” i“ Protection of equipment and explosive environment Part 1: general requirements of equipment, according to the two national standards, the mobile phone modification and battery transformation, to meet the standards stipulated by the state, sent to the national explosion-proof inspection agency to pass the inspection, in accordance with the regulations produced by the mobile phone is a real explosion-proof mobile phone.

Then someone asked, you said this is an explosion-proof mobile phone, how is it an explosion-proof law, and what models are explosion-proof? That small series will give you a brief introduction to the explosion-proof is not only the safety type, it also has 9 kinds of explosion-proof type. Let's take a look.

1, flameproof type explosion-proof (standard number: GB3836.2)/explosion-proof mark: Ex d

Flameproof type (Standard No. : GB3836.2)/ flameproof mark: Ex d

The flameproof shell can withstand any joint surface or structural gap through the shell, and the combustible mixture involved in penetrating the inside of the shell will explode inside without damage, and will not cause the ignition of the explosive environment formed by one or more gases or vapors outside.

Commonly used flameproof equipment: motor, lamps, explosion-proof thermocouple, explosion-proof thermal resistance, explosion-proof pressure transmitter and other explosion-proof instruments.

2, increased safety explosion-proof (standard number: GB3836.3)/explosion-proof mark: Ex e

Increased safety explosion-proof principle: For the equipment that does not produce arc, spark and dangerous high temperature during normal operation, if some protective measures are taken on its structure, so that the equipment does not arc and spark overheating under normal operation or approved overload conditions, it can improve the safety of the equipment and achieve the purpose of explosion-proof.

Commonly used increased safety equipment: increased safety motor, increased safety electrical appliances, increased safety lamps and so on.

3, the safety type explosion-proof (standard number: GB3836.4)/explosion-proof mark: Ex is

Inherent safety explosion-proof principle: The electric spark and surface temperature generated by the circuit in normal operation or the specified fault state can not cause the explosion of the specified explosive mixture.

Commonly used intrinsic-safety equipment: intrinsic-safety temperature transmitter, pressure transmitter, liquid level transmitter, etc.

Note: Intrinsic safety explosion-proof is the highest grade explosion-proof method. It can be used in zone 0, Zone 1, zone 2 or non-hazardous areas, and it is the only explosion-proof form allowed to be installed in zone 0, and it must constitute a reasonable safety system with associated equipment (such as safety grid). Other explosion-proof forms can only be used in zone 1 and Zone 2, and the danger degree of zone 0, Zone 1 and zone 2 decreases.

4, positive pressure type explosion-proof (standard number: GB3836.5)/explosion-proof mark: Ex p

Positive pressure explosion-proof principle: The protective gas, such as fresh air, is continuously filled inside the shell of the equipment, so that the internal pressure of the equipment is higher than the external pressure, so that the external flammable gas cannot enter or cannot reach the concentration of explosion. Its interior is also equipped with gas pressure detection, flammable gas concentration alarm device, once the pressure is insufficient, flammable gas concentration is too high than dangerous concentration and other dangerous situations can automatically cut off the power supply.

Commonly used positive pressure type equipment: positive pressure type analysis cabin.

5, oil-filled explosion-proof (standard number: GB3836.6)/explosion-proof mark: Ex o

Oil-filled explosion-proof principle: The device or the entire equipment that may have sparks and arcs inside the equipment is immersed in variable pressure oil to isolate it from the combustible gas mixture.

Commonly used oil-filled equipment: explosion-proof switches, terminals, etc.

6, sand type explosion-proof (standard number: GB3836.7)/explosion-proof mark: Ex q

Sand-filled explosion-proof principle: The shell of the equipment is filled with sand material, so that the equipment under specified conditions, the flame transmitted by the arc generated in the shell, the superheated temperature of the shell wall or the surface of the sand material, cannot ignite the explosive mixture around.

Commonly used sand filling equipment: capacitors, fuses, transformers, etc.

7, no spark explosion-proof (standard number: GB3836.8)/explosion-proof mark: Ex n

Non-spark explosion-proof principle: The surrounding explosive mixture cannot be ignited during normal operation, and generally does not produce electrical equipment that can cause ignition failure.

Commonly used non-spark type equipment: motor, lighting fixtures, latch devices, low-power electrical appliances.

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8, cast type explosion-proof (standard number: GB3836.9)/explosion-proof mark: Ex m

Encapsulation type explosion-proof principle: The ignition source (such as arc, spark, dangerous high temperature) of the electrical equipment that may ignite the explosive mixture is sealed in the resin type sealing agent, so that it cannot ignite the explosive mixture that may exist around.

9, airtight explosion-proof (standard number: GB3836.10)/explosion-proof mark: Ex h

Airtight explosion-proof principle: The equipment adopts sealing measures, so that flammable and explosive substances can not enter the equipment.

Commonly used airtight equipment: relays, capacitors, transformers, etc.

Commonly used limited breathing equipment: switches, regulators, meters, etc.

10, dust explosion-proof (standard number: GB12476.4)/explosion-proof mark: Ex iaD

Dust type explosion-proof principle: dust explosion discharge, equipment barrier “ Dust source ” The increased pressure creates a shock wave.

Commonly used dust explosion-proof equipment: dust collector, workshop alarm equipment, etc.