Stand cover of the last century as the early 1970s emerging products, the notable features of the top beam between the terminal and the base of attaching a shield. Cover is generally inclined beams, the hinged roof beams and between the base. Kinematics from the speakers, it is stable, which is the optimal shield in the box-stent and the stent Crib 1:00, Leung also cover is closed goaf, so as to prevent the rock into the broken roof support Face. Therefore, in general, cover Stand Face the support of the cleaner.
This paper describes : hydraulic supports the development process and development trends; Hydraulic support the composition, role and classification; hydraulic supports the hydraulic control system; hydraulic supports the general design steps; hydraulic supports manipulation, maintenance, Fault analysis and processing. In ZY8600-hydraulic support the design process, focusing on the top beam and column base and the analysis and design Meanwhile hydraulic supports the right hydraulic system was introduced. According to their common failure mode, influencing factors and basic design requirements, is an important structure the force. Strength and stiffness of the design method. The stent in the four-bar linkage design, using a computer to solve. Column right balance between Jack and the strength and stability of nuclear efficiency.