What is the principle of explosion-proof electrical equipment?

You will understand if you read more about the classification of explosion-proof and protection levels.~~~

Explosion-proof electrical equipment is* * Electrical equipment of standard design and manufacture that will not cause an explosion of surrounding explosive mixtures. In coal, petroleum, chemical and other industries, the production environment, * * Different qualities require different explosion-proof measures. In order to standardize the design and manufacturing of explosion-proof electrical equipment and facilitate inspection, use and maintenance, our country has formulated a complete standard for explosion-proof electrical equipment. * * standard. Current explosion-proof electrical equipment * * The standard is GB3836, which basically corresponds to the IEC79 standard. According to the explosion-proof measures taken, GB3836 divides explosion-proof electrical equipment into explosion-proof type, increased safety type, intrinsically safe type, positive pressure type, oil-filled type, sand-filled type, non-sparking type, sealed type, air-tight type and special type. a. Explosion-proof electrical equipment Electrical equipment with a flame-proof enclosure is called explosion-proof electrical equipment. The explosion-proof shell can not only withstand the explosion pressure of the explosive gas mixture inside, but also prevent the internal explosion from propagating to the explosive mixture around the shell. The standard for this type of equipment is GB3836.2-83 "Explosion-proof electrical equipment for explosive environments—Explosion-proof electrical equipment." b. Electrical equipment that does not produce arcs, sparks, or high temperatures that may ignite explosive mixtures under normal operating conditions. Electrical equipment that takes structural measures to improve safety to avoid arcs, sparks, or high temperatures that may ignite explosive mixtures under normal or specified overload conditions is called increased safety electrical equipment. The standard for this equipment is GB3836.3-83 "Explosion-proof Electrical Equipment for Explosive Environments - Increased Safety Electrical Equipment". c. Intrinsically safe electrical equipment. Electrical equipment where all circuits are intrinsically safe circuits is called intrinsically safe electrical equipment. The so-called intrinsically safe circuit refers to a circuit that under specified conditions, under normal operation or specified fault conditions, the generated sparks and thermal effects cannot ignite explosive mixtures. The standard for this type of equipment is GB3836.4-83 "Explosion-proof Electrical Equipment for Explosive Environments - Intrinsically Safe Circuits and Electrical Equipment" d. Positive-pressure electrical equipment Electrical equipment with a positive-pressure enclosure is called positive-pressure electrical equipment. The so-called positive pressure shell refers to an shell that introduces protective gas into the shell to keep the pressure of the internal protective gas higher than the pressure of the surrounding explosive environment to prevent external explosive mixtures from entering the shell. The standard for this type of equipment is GB3836.5-87 "Explosion-proof Electrical Equipment for Explosive Environments - Positive Pressure Electrical Equipment". e. Oil-filled electrical equipment. Electrical equipment in which all components or some components that may generate sparks or overheat are immersed in oil so that they cannot ignite explosive mixtures above the oil surface or outside the shell are called oil-filled electrical equipment. The standard for this type of equipment is GB3836.8-87 "Explosion-proof electrical equipment for explosive environments—Oil-filled electrical equipment." f. Electrical equipment that is filled with sand material inside the shell of sand-filled electrical equipment so that the arc generated in the shell, the propagating flame, the superheated temperature of the shell wall or the surface of the sand material cannot ignite the explosive mixture around the equipment under specified conditions is called sand-filled electrical equipment. The standard for this type of equipment is GB3836.7-87 "Explosion-proof electrical equipment for explosive environments—Sand-filled electrical equipment." g. Non-sparking electrical equipment will not ignite surrounding explosive mixtures under normal operating conditions, and electrical equipment that generally does not cause ignition failures is called non-sparking electrical equipment. Measures must be taken when designing and manufacturing non-sparking electrical equipment so that the equipment will not produce arcs, sparks or dangerous temperatures that can cause ignition during normal operation, and that no electrical or mechanical failures that can cause ignition will occur under normal circumstances. The standard for this type of electrical equipment is GB3836.8-87 "Explosion-proof electrical equipment for explosive environments - non-sparking electrical equipment". h. The entire equipment or part of the encapsulated electrical equipment, that is, the electrical equipment that may generate arcs, sparks or high temperatures that may ignite the explosive mixture is encapsulated in the encapsulating agent and cannot ignite the surrounding explosive mixture under normal operation and approved overload or approved fault. The standard for this type of electrical equipment is GB3836.9-90 "Explosion-proof Electrical Equipment for Explosive Environments - Pouring Type Electrical Equipment". i. Airtight electrical equipment Electrical equipment with an airtight enclosure. The shell is sealed by melting, extruding or gluing to prevent gas outside the shell from entering the shell and isolating it from the source of ignition. The standard for this type of equipment is GB3836.10-90 "Explosion-proof electrical equipment for explosive environments - Air-tight electrical equipment". j. Special electrical equipment: Electrical equipment that does not belong to the above basic explosion-proof types in structure, or is a combination of the above basic explosion-proof types, but has taken other special measures and has been fully tested and proven to have the ability to prevent the ignition of explosive gas mixtures is called special electrical equipment. This type of equipment must be * * If the inspection unit designated by the competent department passes the inspection, it shall also report * * Filing with the Bureau of Standards. k. Dust explosion-proof electrical equipment is designed and manufactured according to specified conditions so that its shell can prevent the entry of combustible dust or the amount of ingress will not hinder the safe operation of the equipment, and the dust accumulated inside will not easily create an ignition hazard, thereby ensuring that the electrical equipment will not cause the explosion of surrounding explosive mixtures when used. The standard for this type of equipment is GB1276.1-90 "Explosion-proof Electrical Equipment for Explosive Dust Environments - Dust Explosion-Proof Electrical Equipment".

Explosion-proof mobile phone: The energy released by all operations during the use of the mobile phone is not enough to cause an explosion in the environment. The principle is intrinsically safe, explosion-proof switch: The person above made it very clear that the types are different and the principles are different. Explosion-proof fan: The motor is explosion-proof. If various possible accidents occur during the operation of the fan, its mechanical part will not produce factors that cause explosions. The principle mainly solves sparks from the material and temperature problems from the structure. I don’t know if I made it clear?

I don’t know much about explosion-proof switches and fans, but explosion-proof mobile phones are easy to understand.

1. What is an explosion-proof mobile phone? An explosion-proof mobile phone is a mobile phone that will not form an effective ignition source in a flammable and explosive environment, ensuring safe communication in a flammable and explosive environment. Explosion-proof mobile phones are intrinsically safe products. The body has protective measures and must be obtained. * * Level explosion-proof certification. 2. Why are explosion-proof mobile phones explosion-proof? Explosion-proof mobile phones use "i", which means intrinsically safe and intrinsically safe explosion-proof. For a mobile phone, the following are the factors most likely to cause effective ignition sources: circuit short circuit or spark, internal or external short circuit of the battery, mechanical damage caused by falling or reinstallation, any possible failure of semiconductor parts, excessive temperature, and static electricity. Intrinsically safe explosion-proof mobile phones take measures such as adding protection circuits, increasing circuit board spacing, shielding and encapsulating electronic components, using special materials to make mobile phone casings, and other measures to ensure that the energy generated by the electronic components inside the mobile phone is insufficient to form an effective ignition source even when short-circuited or failed, thus ensuring the safety of users in flammable and explosive environments. Explosion-proof mobile phones have been applied to oil companies, gas industry, coal gas, natural gas industry, chemical industry, and pharmaceutical industry. http://www.lnshjk.com/ Shenzhen GoodXun brand