Construction hoists by sprocket chain hoists, manual chain, transmission machinery, lifting chain and hook up and down several components. Which can be divided into mechanical transmission parts worm gear drive type and two kinds. Due to the low mechanical efficiency worm type transmission, parts easy to wear, so now generally used gear. Model specifications from 0.5 tons to 50 tons range. Hoists should be how to detect? A: Detection method: once a year. The first order of 1.25 times the rated load for 10 minutes static load test, then 1.1 times the rated load for the dynamic test chain hoists, require good braking performance, no stretch phenomenon; once a year after 1.1 times the rated load dynamic load test. Chain hoists to be done before using it to check? A: 1, must identify their load capacity, not overloaded use; 2, check the hooks, chains, gears and brakes are good. When the hook, sprockets, down cards, which are deformed, and when the chain diameter wear volume 15% HSZ chain hoist, is strictly prohibited. Also check whether the wrong link twisting, double under hook rack or without flipping chain, lifting chain link or without cracking. Chain hoists are lifting tools: a manual hoist it as an upgraded version of the fixed pulley device, fully inherited the advantages of fixed pulley, while using a combination of reverse backstop brakes reducer and chain pulley block, the symmetrical arrangement of two stage spur gear rotating structure, simple, durable and efficient. Qingyuan Xinyu Crane Co. hoist manufacturers supply chain hoists brand, size, model number, first introduce Shanghai Yan hoists. Shanghai Yan hoists its advanced design, manufacturing processes and reasonable supply chain hoists, excellent performance, for domestic and international markets upscale quality hoist chain hoists, chain hoists Shanghai Yan has a beautiful appearance, small size, the use of safe and reliable, whole Excellent machine strength; high transmission efficiency, hand light and feel good hand zippers, thus greatly reducing the operator's labor intensity and so on. Chain hoists, chain hoists, Hubei wholesale _ _ Xinyu Xinyu lifting provided by Crane Co. Qingyuan. Qingyuan Xinyu Crane Co. (xyqz0312.1688.com) strong, credible, Baoding in Hebei engineering, construction crane industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xinyu lifting and you hand into the brilliant, for a better future!