400 tons of cranes in Nanning up to 120 meters high (Figure)

On August 21st, a crane sales agent delivered Guangxi's first 400-ton truck crane to a company in Nanning City. In the future, this extra-heavy crane will be used in various construction projects in Guangxi.

It is understood that truck cranes are mostly used in nuclear power projects, road and bridge projects and large-scale machine lifting of factory construction projects. At present, there are three 180-ton truck cranes in the Guangxi lifting market, and four 220-ton truck cranes. The 400-ton truck crane is still in its incarnation for the first time.

The cranes usually seen on the road surface are mostly 25 tons. What is the difference between the 400-ton truck crane that sells for 23 million yuan and the 25-ton truck crane? The reporter watched at the scene and learned that in terms of appearance, the 400-ton car crane is a monster. The size of the vehicle looks to be 3 times that of a 25-ton truck crane, and the length of the vehicle is about 20 meters. The boom also looks much bigger. The body weight of the 400-ton truck crane is about 50 tons and the weight is about 140 tons. The boom has a length of 61 meters, plus a tower jib, which can lift objects up to 120 meters in height.

Isn't the car crane capable of lifting 400 tons of objects under any circumstances? of course not. According to the principle of leverage, the shorter the radius of the circle between the boom and the ground, the greater the weight of the suspended object. In general, a radius of 4 meters or less can lift 400 tons of weight. A radius of 8 meters or less can lift 60 tons of weight. When the boom reaches a maximum radius of 56 meters, only about two tons of weight can be hoisted.

How can such a large truck crane run on the road? Huang Peiliang, a driver, said that before reaching the operating point, the counterweight on the car, that is, the upper part of the operating room should be unloaded and transported by truck. After reaching the operating point, install it again. The car has seven axles for each pair of wheels. When you need to turn, turn the steering wheel. The 7 pairs of wheels will turn at the same time. You can turn around on a 25-meter-wide road surface.

It is understood that in the past, some construction projects in Guangxi were to be equipped with large-scale equipment, and several “lightweight” cranes would have to work together to complete the work. One 400-ton truck crane may complete this work. Liao Xuegan, the general manager of a company in Nanning receiving this machine, said that the characteristics of the crane and the tower crane can only be fixed at different locations. It can flexibly change the operating point, and it is high enough to lift the weight.