Explosion-proof technology In the electronic weighing industry, the explosion-proof electronic platform is one of the products with high technical content. The explosion-proof electronic system adopts the integration technology of intrinsically safe circuit and explosion-proof instrument display in the explosion-proof system.
Three kinds of certificates issued by the IEC Ex system: 1. Explosion-proof type inspection report 2. Factory quality inspection report 3. Certificate of certification. Explosion-proof scales can be divided into intrinsically safe explosion-proof electronic platform scales according to the type of explosion-proof electronic scales, explosion-proof explosion-proof electronic platform scales, and composite explosion-proof electronic platform scales.
1) Intrinsically safe type: All parts of the electronic weighing instrument are intrinsically safe and explosion-proof, suitable for most explosive environments. Explosion-proof mark of this case: ExibIICT4/T5
2) Explosion-proof type: Some parts of the electronic weighing instrument are isolated and explosion-proof by using a flameproof box, but the components and interfaces other than the explosion-proof box still need to be intrinsically safe. Explosion-proof type explosion-proof mark: ExibIIBT6
3) Composite type: part of all parts of the electronic weighing instrument is placed in the danger zone, and the other part is placed in the safety zone. Generally, the intrinsically safe type is used in the sensor and junction box of the dangerous zone, and then connected to the common instrument through the associated equipment in the safety zone. . This mode is quite flexible because the operation is in the safe zone. Composite type explosion-proof mark: ExibIICT6
Electronic platform scales can be widely used in petroleum, chemical, mining, pharmaceutical, aerospace, and military sectors. It is well known that 2 tons of electronic platform scale will adopt corresponding design measures in the impact of changes in special use environment conditions such as flammable and explosive. In recent years, the International Electrotechnical Commission has issued the Ex/OD005 manufacturer quality system requirements for the use of electrical equipment safety standards in explosive environments. China requires domestic explosion-proof equipment manufacturers to obtain IEC EX explosion-proof product manufacturing licenses. Pass the certification audit of the explosion-proof electrical product factory quality assurance system.
After zui, it is pointed out once again that the explosion-proof electronic weighbridge is one of the products with high technical content in the product. Therefore, in selecting the explosion-proof electrical equipment, it is necessary to strengthen the knowledge of explosion-proof, and it is imperative to ensure that the explosion-proof products are selected by yourself. Let me tell you something to pay attention to:
1. First determine the hazardous medium in which it is used and the area in which it is used
2. Determine the form, category, level and temperature category of the explosion-proof electronic scale
3. Gas explosion-proof and dust explosion-proof are completely different; coal mine explosion-proof and conventional explosion-proof are completely different
4. The installation and use of explosion-proof electronic scales must be strictly in accordance with construction specifications.
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