Discussion on the application of explosion-proof technology in electronic weighing instrument industry

The explosion-proof technology is one of the high-tech products in the electronic weighing instrument industry The explosion-proof electronic system adopts the integrated technology of intrinsically safe circuit and explosion-proof instrument display Three certificates issued by IEC ex system: 1 Explosion proof type inspection report 2 Factory quality inspection report 3 Certification certificate According to the explosion-proof type, the explosion-proof weighing apparatus can be divided into intrinsically safe explosion-proof electronic weighing apparatus, explosion-proof electronic weighing apparatus and composite explosion-proof electronic weighing apparatus 1) intrinsically safe type: all parts of electronic weighing apparatus adopt intrinsically safe explosion-proof measures, which are applicable to most explosive environments The explosion-proof sign of this case type: exibiict4 / T5 2) explosion-proof type: some parts of electronic weighing apparatus are isolated and explosion-proof by explosion-proof box, but the parts and interfaces outside the explosion-proof box still need to be intrinsically safe Explosion proof sign of explosion-proof type: exibiibt6 3) composite type: all parts of electronic weighing apparatus are placed in the danger zone, and the other part is placed in the safety zone Generally, sensors, junction boxes, etc in the danger zone are intrinsically safe, and then they are connected with ordinary meters through associated equipment in the safety zone This mode is quite flexible because the operation is in a safe area Composite explosion-proof sign: exibiict6 electronic weighbridge can be widely used in petroleum, chemical, mine, medicine, aerospace and military sectors As we all know, 2 tons electronic weighbridge will take corresponding design measures in the impact of changes in special use environment conditions such as inflammable and explosive In recent years, the International Electrotechnical Commission (IEC) has issued the quality system requirements for the manufacturer of the safety standard certification system ex / od005 for electrical equipment used in explosive atmospheres China requires that domestic explosion-proof equipment manufacturers who have obtained the IEC ex explosion-proof product manufacturing license must pass the certification audit of the quality assurance system of the explosion-proof electrical product factory every year Zui pointed out once again that explosion-proof electronic weighbridge is one of the products with high technical content Therefore, it is imperative to strengthen the knowledge of explosion-proof when selecting explosion-proof electrical equipment, and ensure that you have selected the right explosion-proof product Here are some precautions: 1 First, determine the dangerous medium in the use and the area where it is located 2 Determine the form, category, grade and temperature group of explosion-proof electronic scale in turn 3 Gas explosion-proof and dust explosion-proof are totally different; coal mine explosion-proof and conventional explosion-proof are totally different 4 The installation and use of explosion-proof electronic scale must be carried out in strict accordance with the construction specifications