Explosion-proof hoists must not only prevent sparks, high temperatures, and electric arcs generated by themselves from igniting surrounding explosive media, but also ensure the stability and safety of hoisting operations. Shenxi Machinery Co., Ltd.’s explosion-proof hoists incorporate excellent design and key technologies.
Key components have undergone explosion-proof treatment, including the motor, brake, reducer, and control system, all of which have been specifically optimized for explosion-proof protection. The drive motor is a special explosion-proof motor with high-temperature resistant insulating material windings. The winding temperature is monitored in real time by a temperature sensor, and the machine automatically stops when the temperature exceeds the limit. The brake shoes are made of non-sparking materials to avoid sparks generated by friction with the brake wheel. The surface of the brake wheel has been hardened. The “dual braking system” avoids overspeeding caused by the failure of a single brake. The control circuit adopts a low-voltage design, electrical components are selected from explosion-proof certified products, wiring terminals use explosion-proof sealed joints, the wire rope is coated with an anti-static coating, and the sheave and drum gaskets are made of non-metallic wear-resistant materials to avoid sparks generated by collisions.
The safety protection system proactively prevents malfunctions and dangers, equipped with multiple safety protection devices to achieve early fault detection and early hazard prevention. Overspeed protection is achieved through speed sensors, which monitor the lifting speed in real time. When the speed exceeds the rated speed by 15%, an emergency brake is triggered to prevent wire rope breakage or equipment loss of control due to overspeed. Overload protection is provided by tension sensors installed on the drum or wire rope end. When the load exceeds the rated value by 10%, the drive power is immediately cut off and braking is initiated to prevent motor overload and overheating or wire rope breakage. A rope breakage catcher is installed on the lifting container for rope breakage protection. If the wire rope breaks, the catcher mechanically clamps the container onto the guide rail to prevent it from falling. Limit switches are installed at the upper and lower ends of the hoist for limit protection. When the container approaches the end, it automatically decelerates and forces a stop when it reaches the limit position to prevent “overshooting” or “crashing.” Explosion-proof temperature sensors are installed on critical parts such as the motor windings, brake wheel, and bearings to monitor the temperature in real time. If the temperature exceeds the limit, an alarm is immediately triggered and the machine stops.
Shenxi Machinery’s explosion-proof hoists have passed the verification of “authoritative certification” and “standard specifications”, and comply with GB 3836 series, GB 50058, MT/T 1097 standards. They also comply with international standards such as IEC 60079 series and ATEX, and can be legally used in flammable and explosive environments.
The key to explosion-proof hoists can be summarized as “explosion-proof as the foundation, safety as the bottom line, and compliance as the guarantee.” Shenxi Machinery Co., Ltd.’s products prevent operational failures through multiple safety protection systems, and combined with compliance certification and regular maintenance, ultimately achieve the goal of “safe and stable operation in flammable and explosive environments.”
