The invention provides a crane. The crane comprises a bearing platform; the cargo boom is mounted on the bearing table; the propeller strut is mounted on the bearing table and connected with the cargo boom through a variable-amplitude steel wire rope; the prestress equipment comprises a prestress part, the prestress part is located on the side, away from the cargo boom, of the propeller strut, the first end of the prestress part is connected to the top end of the propeller strut, the second end of the prestress part is connected to the bearing table, the prestress part has a stretching state, and in the stretching state, the first end of the prestress part is connected to the propeller strut, and the second end of the prestress part is connected to the cargo boom. The pre-stressed part has the tensile stress larger than zero. The crane is provided with the prestress equipment to apply tensile stress to the propeller strut of the crane so as to change the stress field of the propeller strut when the crane is suspended, so that the structural strength of the propeller strut is improved, and the bearing capacity of the propeller strut of the crane and the suspended load safety and stability of the crane are improved.
本公开提供了一种起重机。起重机包括:承载台;起重臂,安装在所述承载台上;人字架,安装在所述承载台上,与所述起重臂通过变幅钢丝绳连接;和预应力设备,包括预应力件,所述预应力件位于所述人字架的远离所述起重臂的一侧,所述预应力件的第一端连接在所述人字架的顶端,第二端连接在所述承载台上,并且所述预应力件具有拉伸状态,在所述拉伸状态,所述预应力件具有大于零的拉应力。该起重机设置预应力设备对起重机的人字架施加拉应力,以改变在起重机吊载时人字架的应力场,从而提高人字架的结构强度,提高起重机人字架的承载能力和起重机吊载的安全性和稳定性。
Crane
起重机
2024-01-16
Patent
Elektronische Ressource
Chinesisch
IPC: | B66C Krane , CRANES |
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