The earliest emergence of similar elevators was traced back to ancient China and European countries, when the goods were transported vertically by tools such as the windlass. The modern screw elevator was the product of the invention of the steam engine in the 19th century. In 1845, the first hydraulic elevator was born, and the liquid used was water.
In 1853, an American named Elisha Otis invented the automatic safety device, which greatly improved the safety of the hoisting of steel cables. On March 23, 1857, a five-story shop in New York City installed the first passenger lift to use the Otis safety device. Since then, the use of lift has been widely accepted and developed rapidly.
The first lift was driven by a steam engine, so the building must have a boiler room. In 1880, the German Siemens invented the electric lift, and the real elevator came into existence. Since then, the use of lift has been widely accepted and developed rapidly.
In modern times, we used a wooden ladder to lift the goods, which is very inconvenient and dangerous to climb. China's first city to install a lift is Shanghai.
At present, the domestic production of the silk pole lift, the product model is different, the lifting height is 4 meters, 6 meters,, 18 meters and even 100 meters. Select the domestic and foreign advanced hydraulic, motor, pump station system, hydraulic system explosion-proof device and hydraulic self-locking device. It has the advantages of novel design, reasonable structure, lifting balance, simple operation, convenient maintenance, etc. Widely used in plant maintenance, industrial installation, equipment maintenance management, warehouse, aviation, airports, ports, railway stations, mechanical, chemical, pharmaceutical, electronics, electric power and other high-altitude equipment installation and maintenance.
Now, the development of screw elevator is in a peak state, because most of the manufacturers or individuals to improve the utilization efficiency of space, more options for multistory buildings, which also need a device to convenient up and down by the goods. Because of the cost is high, the bearing capacity is low, not suitable for carrying dozens of tons or hundreds of tons of goods, so developed a high bearing capacity of screw elevator to assist in the production and transportation of goods. The ladder is safe and has a large load capacity, and the maintenance is convenient, which makes this special industry develop faster.
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