From December 10th to 12th, the China Academic Conference on Mine Geology Environmental Protection and Rehabilitation was held in Zunyi City, Guizhou Province. Meeting revealed that from 2000 to 2013, the central government allocated special funds of mine geological environment governance 26.997 billion yuan, the implementation of mine geological environment governance projects 1934, the central finance and investment to promote local businesses to invest in capital of 46 billion yuan.
According to reports, China's mine geological environment protection and governance work has made great achievements. As of 2009, after restoration and restoration, the country has restored a land area of ​​about 496,000 hectares, and managed 5,195 geological disasters in mines, and managed 3,37 ground cracks and ground collapses. The national mine geological environment control work has entered the stage of adjustment and improvement. The key points and directions of the project have been transferred from small projects with support and scattered funds in the past to support major projects.
At the same time, the experts pointed out that because some governance projects violated the laws of nature, the phenomenon of “one year green, two years of waste, three years of death†exists to varying degrees, and measures must be taken to avoid them. Some plants planted in the treatment project do not adapt to the local environment, and the recovery effect of the geological environment of the mine cannot be sustained.
Experts suggest that the mine should first grasp all the geological and meteorological data of the local and mountain areas, conduct regional forest facies surveys, and fully consider the species diversity of the substrate, and the community of plants and other factors to make the slope stable and overall green. Water and soil conservation, restore the original mountain appearance. The selected plants should emphasize the adaptation to the climate and soil characteristics of the region, with trees as the mainstay, grass, wood and flowers combined, both localized and diversified, and if necessary, a small number of exotic and innocuous species should be introduced to achieve maintenance-free and natural The recovery effect of growth.
The meeting was co-sponsored by China Geological Hazard Prevention Engineering Industry Association and Guizhou Provincial Department of Land and Resources. The 106 Geological Brigade of Guizhou Provincial Bureau of Geology and Minerals was organized to exchange ideas on how to effectively protect the geological environment of the mine and achieve coordinated development of resource development and geological environment protection. Promote the construction of "harmonious mining areas".
Tower Crane gear mainly including 19/38/99 teeth gear, bevel gear, Tower Crane Sun Gear, and so on, which are the critical parts of the tower crane reducer. 19 teeth gear and 38 teeth gear are connected with two motor shaft repectively, which are connected with 99 teeth gear. The speed is reduced by the transmission of gears.
A bevel gear is a type of gear that has teeth cut on a conical surface. It is commonly used in tower cranes to transmit power between the vertical and horizontal shafts.
In a tower crane, the bevel gear is typically used to change the direction of rotation. The vertical shaft, which is connected to the motor, rotates vertically, while the horizontal shaft, which is connected to the crane's boom, rotates horizontally.
The bevel gear consists of two gears with intersecting axes. The teeth on the gears are cut at an angle, allowing them to mesh smoothly and transmit power. The gear ratio of the bevel gear determines the speed and torque of the rotation.
The bevel gear in a tower crane is designed to withstand heavy loads and provide efficient power transmission. It is usually made of high-strength steel to ensure durability and reliability in demanding crane operations.
Overall, the bevel gear plays a crucial role in the functioning of a tower crane by enabling the transfer of power and changing the direction of rotation between the vertical and horizontal shafts.
Bevel Gear,Tower Crane Sun Gear,Crane Pinion Gear,Tower Crane Transmission Gear,Tower Crane Drive Shaft
SHEN YANG BAOQUAN BUSINESS CO., LTD , https://www.sytoplesstowercrane.com