Box without external rotation gantry crane technical characteristics and selection principles

Box without external rotation  gantry crane  with hoist supporting the use. It uses steel legs, frontal area is small, open spaces and windy areas best light gantry jib crane s, free exercise, to operate two operating modes. From the weight of Gn = 2-32t, span of 10-35m, +40 ℃ ambient temperature below the operating system is 25%, pressure is not greater than 125Pa.
Technical features: triple transmission, electrical non-contact speed control module, and can achieve fine speed and two-speed close-conversion function, so that running, lifting, electric particularly stable. With overload alarm, pull the oblique hanging crooked, anti-hook hoisting two protection, overcurrent protection and other missing items, console (handle) with 12V safe voltage in order to achieve a single beam multi-function protection. Voltage 380V +5 ~ -10% within the electric control long-term use up to 200 million times.
Selection principle: The industry, start, jog times / 1h. Daily practical time. Must specify: light  Steel crane  , jog, starting as Gn/10 ≈ 80 times / 1h, Gn / 2 ≈ 40 times / 1h, Gn / 1 ≈ 15-20 times / 1h, temperature 50 ℃ and harsh environments times / 1h ÷ ; 2 (superb 800 meters above sea level when the state).