In order to do a good job in the explosion-proof work of chemical and electrical, the correct selection of high-quality explosion-proof electrical products, the reasonable installation, use and maintenance of explosion-proof electrical equipment, and the strengthening of electrical explosion-proof safety regulations and professional technical training are the guarantees for chemical safety production. Safety inspection is one of the measures for factory safety production, prevention of dangerous accidents, and elimination of hidden dangers of accidents. The basis of the inspection is the standard specifications and regulations of safety production, and at the same time, it is also necessary to take into account the actual situation of the site, and adopt scientific theory and engineering practice to determine whether it is a hidden danger, how to deal with it and correct it.
Common explosion-proof power distribution device problems in chemical sites.
1.Does not meet the requirements of explosion-proof area: the conveying medium in the metering room is **, and explosion-proof electrical equipment of T3 and above temperature group must be selected. The explosion-proof motor of the sand removal tank is an EX mine explosion-proof motor, which cannot meet the requirements of the explosion-proof place of the factory.
2.Unapproved modifications.
The introduction device is added to the opening without permission, and the opening does not meet the requirements of the explosion-proof structure and parameters, which destroys the flameproof performance of the original shell, which is an approved modification.
3.Explosion-proof surface corrosion.
The flameproof surface is seriously corroded, and it no longer meets the parameter requirements of the explosionproof surface, which makes the explosion-proof performance of the equipment fail.
4.The seal does not meet the protection requirements.
The gasket between the housing and the cover is broken and does not meet the requirements of IP65 protection class. There is no protective rubber liner between the shell and the cover, which does not meet the protection requirements of IP54 for the increased safety shell.
5.The inlet does not meet the requirements of the specification standard.
The unused inlet is connected with the steel pipe, and there is no blocking measure, which makes the explosion-proof performance of the equipment failThe inlet is an ordinary wire, without a sealed component, which does not meet the requirements of the equipment's flameproof performance. Plastic hold-down nut, two wires share a lead-in wire, cable loosening.
6.Loosening, missing, etc. (fasteners are loose, missing due to vibration, or the fastening screws are not tightened).
7.Explosion-proof electrical grounding is not standardized, etc.
The external grounding wire is not connected or the grounding wire is connected in series;
8.The explosion-proof electrical nameplate is unclear or missing.