What's the explosion proof?What should I pay attention to when developing?The more detailed, the better
Principle introduction:The principle of flameproof type according to the European standard EN13463-1:2002 "explosive environment with non electrical equipment part first: explosion proof fire type and requirements" concept and basic method, flameproof explosion-proof type is a kind of action to allow internal explosion and prevent flame detonation, is one of the most common type of explosion-proof. As the explosion-proof type of lamp housing is generally made of metal materials, good heat dissipation, high strength and durability of the shell, it is very popular with users. In addition, many types of flameproof lamps and lanterns, such as lampholders and interlock switches, also use flameproof structures. Electrical equipment with flameproof enclosure is called flameproof electrical equipment. If the explosive gas mixture enters the flameproof enclosure and is ignited, the flameproof enclosure can withstand the explosion pressure of the internal explosive gas mixture and prevent the internal explosion from spreading to the explosive mixture around the shell. This is a gap explosion-proof principle, propagation and cooling of explosion products using metal gap can prevent explosion flame temperature of flame out and cooling, a structural design principle of explosion suppression expansion.
The working principle of explosion proof lampAn explosion is a sudden change of substance from one state to another by physical or chemical changes, and gives off enormous energy. The energy released at a rapid rate will cause the surrounding object to be subjected to severe impact and destruction.Three conditions that an explosion must have:1) explosive substance: a substance that can react with oxygen (air), including gases, liquids, and solids. (gas: hydrogen, acetylene, methane, etc.; liquid: alcohol, gasoline; solids: dust, fibers, dust, etc.)2) oxygen: air.3) ignition source: including open flame, electric spark, mechanical spark, electrostatic spark, high temperature, chemical reaction, light energy and so on.Why explosion proof?Explosive substances: many production sites produce certain flammable substances. About 2/3 of the coal mines have explosive substances. In the chemical industry, more than 80% of the production plants have explosive substances. Oxygen: oxygen in the air is everywhere. Ignition source: a large number of electrical instruments are used in the production process, electrical sparks of all kinds of friction, mechanical wear, sparks, static sparks, high temperatures are unavoidable, especially when the instrument and electrical faults occur. Objectively, many industrial sites meet explosion conditions. When the mixture of explosive substance and oxygen is in the explosive limit, if there is an explosion source, it will explode. Therefore, it is necessary to take explosion protection.
Explosion conceptAn explosion is a sudden change of substance from one state to another by physical or chemical changes, and gives off enormous energy. The energy released at a rapid rate will cause the surrounding object to be subjected to severe impact and destruction.Three conditions that an explosion must have:1) explosive substance: a substance that can react with oxygen (air), including gases, liquids, and solids. (gas: hydrogen, acetylene, methane, etc.; liquid: alcohol, gasoline; solids: dust, fibers, dust, etc.)2) oxygen: air.3) ignition source: including open flame, electric spark, mechanical spark, electrostatic spark, high temperature, chemical reaction, light energy and so on.Why explosion proof?Explosive substances: many production sites produce certain flammable substances. About 2/3 of the coal mines have explosive substances. In the chemical industry, more than 80% of the production plants have explosive substances. Oxygen: oxygen in the air is everywhere. Ignition source: a large number of electrical instruments are used in the production process, electrical sparks of all kinds of friction, mechanical wear, sparks, static sparks, high temperatures are unavoidable, especially when the instrument and electrical faults occur. Objectively, many industrial sites meet explosion conditions. When the mixture of explosive substance and oxygen is in the explosive limit, if there is an explosion source, it will explode. Therefore, it is necessary to take explosion protection.
