How to choose the price of explosion-proof junction box correctly

The explosion-proof junction box is a special equipment used in various high-risk places Compared with the civil junction box, the safe explosion-proof junction box is a junction box with explosion-proof function which has been transformed by various explosion-proof measures It is made of aluminum alloy die casting or stainless steel welding The price of explosion-proof junction box is the main heating element of Zui in explosion-proof The price of explosion-proof junction box shall select the light source and design the explosion-proof type according to the heating condition and working principle of the light source 1 The price of high-pressure mercury lamp, high-pressure sodium lamp, metal halide lamp and ordinary explosion-proof junction box can still form an electrical circuit when the shell is damaged, so that the contact between explosive gas and hot discharge tube or filament is relatively large Therefore, the price of explosion-proof junction box cannot use these light sources 2 The discharge elements inside the gas discharge lamp must be analyzed to see whether they contain active and unstable chemical elements, how many of them are there, and the properties in cold state For example, there are enough unstable chemical elements in cold state of the light source Once the light source is broken, the active chemical elements in the lamp will react with the moisture in the environment to generate heat, It is possible to ignite explosive mixtures in the environment This kind of light source is strictly prohibited in the price instrument of explosion-proof junction box 3 Tungsten halogen lamp is not suitable for increased safety explosion-proof lamps due to high surface temperature of bubble shell 4 If the same light source is used in lamps with different explosion-proof junction box prices, its temperature group will be different For example, for 200W incandescent lamp, when it is used in the price of explosion-proof junction box, the temperature group of the price of explosion-proof junction box is determined by the high temperature of Zui on the surface of the light source Generally, it can only be determined as T1 When it is used in the price of explosion-proof junction box, T3 can be achieved by the temperature group of Zui high surface temperature of the lamp shell       5。 The allowable light sources for the price of increased safety explosion-proof junction box are: fluorescent lamp without starter, ordinary incandescent lamp and self ballasting fluorescent high-pressure mercury lamp with single plug, which can be cut off instantaneously when the bubble shell is broken Different types and specifications of cable glands meet different cable entries: the entrance (installation end) of plastic cable glands is metric thread, with anti loose clamping claw inside, which has good mechanical characteristics Unused cable inlets can be sealed with empty plug plugs, which will be used for modification and expansion of more convenient facilities in the future Safe and happy, happy and peaceful Adhere to this concept and strive for the brand of Yueqing explosion-proof industry