Explosion -proof gourds are divided into manual gourds and electric gourds. At the same time, electric gourds have ring -chain explosion -proof gourd and steel wire explosion -proof electric gourd. In designing, they consider controlling the source of ignition to prevent dangerous sparks and high temperatures and high temperatures. At present, the common explosion -proof measures to control the ignition source in explosion -proof gourds are:I. Electric sparks: Usually measures such as explosion -barrier, increased safety, binocular type, and dust -proof ignorance are used to achieve explosion -proof.1. In explosion -proof electric gourd strong power equipment and circuits, explosion -type electrical equipment and cable wiring are generally used. Such as large cars and car and lift motors, electrical control cabinets, total power switches, electromagnetic brakes coils or hydraulic drive motors, lighting and switches, power sockets, security linking limits switches, manipulation and emergency stop switches, signal overloaders overload Device, wiring and segmentation boxes, resistors, cabin fan motors, etc.
2. Explosion -proof electric gourds are generally used with internal brake barriers. The brake wheels and gate tiles of the explosion -proof double -beam bridge -type lifting mechanism are relatively small. A large number of open types are used. It is required to control measures such as the gap between the brake wheel and the gate tile and the use of flameless gates.
3. When the explosion -proof level is IIC level, the control of the explosion -proof gourd mechanical spark is generally used in the friction site. Such as large cars and car wheels, electric gourd guide rope, hook hook head, etc.
Third, electrostatic sparks: The surface resistance that limits the material to generate electrostatic material is used to achieve explosion -proof using electrical glue and conductive paint. Non -metallic material surface resistance such as rubber buffer should not be greater than 109Ω.
Fourth, high temperature: Eliminate high temperatures to place high -temperature parts in the shell of the explosion or use heat dissipation, add lubricating oil and other methods to achieve explosion -proof. For example, the brake wheel and gate tile are placed in the explosion -proof shell, while the reducer uses ventilation and heat dissipation, and a galvanized steel wire rope or add lubricating oil.
