The elevator refers to the permanent transportation equipment that serves several specific floors in the building, and its car runs on at least two rigid rails perpendicular to the horizontal plane or inclined with the vertical line less than 15 °. There are also step type. The step board is installed on the track for continuous operation, commonly known as escalator or moving sidewalk. Fixed lifting equipment serving the specified floor. The vertical elevator has a car that runs between at least two rows of vertical or rigid rails with a tilt angle of less than 15 °. The size and structure of the lift car are convenient for passengers to access or load and unload goods. It is customary to use elevators as a general term for vertical transportation in buildings, regardless of their driving mode. According to the speed, it can be divided into low-speed elevators (less than 4m/s), fast elevators (4~12m/s) and high-speed elevators (more than 12m/s). Hydraulic elevators began to appear in the middle of the 19th century and are still used in low rise buildings. In 1852, E.G. Otis of the United States developed a safety elevator for wire rope hoisting. In the 1980s, the driving device was further improved, for example, the motor drives the winding drum through worm drive, and the counterweight is used. At the end of the 19th century, friction wheel drive was adopted to greatly increase the lift height of the elevator.
From the New Year to 2017, it will be a year full of hope and vitality. Only through hard work, can we achieve fruitful results. Only by climbing bravely can we see the infinite scenery. In order to enrich cultural and sports activities, activate the atmosphere, fully display the demeanor of the employees of Guangdong Great Wall Elevator with a high spirit, and stimulate and inspire the enthusiasm of the employees to keep pace with the times, innovate and work hard.
Founded in 1986, Great Wall Elevator was the first joint-stock elevator enterprise in Dongguan in 1995, with nearly 30 years of elevator manufacturing experience. The company has its headquarters and Zhejiang factory. Zhejiang factory is located in Hangzhou, with a professional permanent magnet synchronous traction machine production workshop and a perfect passenger elevator production and manufacturing base. The company headquarters building is located in Dongguan City, Guangdong Province, covering an area of 25000 square meters. It has R&D, marketing, training and other service centers, a 75 meter high elevator test tower, a 2-storey trial production workshop with advanced equipment, and a design production capacity of 12000 Great Wall elevators per year.