An explosion-proof hoist must not only prevent sparks, high temperatures, and electric arcs generated by itself from igniting the surrounding explosive atmosphere, but also ensure the stability and safety of hoisting operations. Shenxi Machinery Co., Ltd. has adopted excellent design and key technologies in its explosion-proof hoist.
Critical core components have undergone explosion-proof treatment, including targeted optimization of the motor, brake, reducer, and control system. The drive motor uses an explosion-proof dedicated motor with high-temperature-resistant insulated windings, and real-time winding temperature monitoring via temperature sensors with automatic shutdown upon overtemperature. The brake shoes are made of “non-sparking materials” to avoid sparks from friction with the brake drum, whose surface has been quenched. A “dual braking system” prevents overspeed caused by single-brake failure. The control circuit adopts a “low-voltage design,” electrical components are “explosion-proof certified products,” wiring terminals use “explosion-proof sealed connectors,” the wire rope features an “anti-static coating,” and the head sheave and drum linings are made of “non-metallic wear-resistant materials” to prevent sparks from impact.
The safety protection system actively prevents failures and hazards, equipped with “multiple safety protection devices” to achieve “early fault detection and early hazard interception.” Overspeed protection is provided by speed sensors that monitor hoisting speed in real time; when the speed exceeds the rated value by 15%, “emergency braking” is triggered to prevent wire rope breakage or equipment runaway due to overspeed. “Load sensors” installed at the drum or rope end provide overload protection; when the load exceeds the rated value by 10%, the drive power is immediately cut off and braking applied to prevent motor overload, overheating, or wire rope breakage. A “rope break catcher” installed on the hoisting container provides rope-break protection; if the wire rope breaks, the catcher mechanically interlocks to rapidly clamp the container onto the guide rails, preventing free fall. “Limit switches” at the upper and lower terminal positions of the hoist provide limit protection; when the container approaches the terminal, it automatically decelerates, and at the extreme position, forced shutdown prevents “overwinding” or “bottoming out.” “Explosion-proof temperature sensors” installed at critical locations such as motor windings, brake drums, and bearings monitor temperature in real time, triggering immediate alarm and shutdown upon overtemperature.
The safety of Shenxi Machinery’s explosion-proof hoist has been validated through “authoritative certification” and “standard compliance,” conforming to the GB 3836 series, GB 50058, and MT/T 1097 standards. It also complies with international standards such as the IEC 60079 series and ATEX, making it legally usable in flammable and explosive environments.
The key to an explosion-proof hoist can be summarized as “explosion prevention as the foundation, safety as the safeguard, and compliance as the guarantee.” Through its multiple safety protection systems that prevent operational failures, combined with compliant certification and regular maintenance, Shenxi Machinery Co., Ltd.’s products ultimately achieve the goal of “safe and stable operation in flammable and explosive environments”—a product worthy of your trust and selection!
