Double Locking Structure Parameter Optimization And Analysis Of Controllable Impact Spear

Urbanization in China is gradually speeding up land available resourcesincreasingly tense, the more urban underground pipeline laying to make urbantransport, communication has become important in the future development ofthree-dimensional orientation of urban construction. The traditional method ofconstruction of underground pipelines for transport and the environment on theground has brought great impact, but also bring a lot of inconvenience to the public anormal life and work. Compared with the traditional method of construction ofunderground pipelines, trenchless technology has a short construction period,applicability, safety, on the ground interference, comprehensive and low cost,therefore trenchless technology infrastructure construction in our country is widelyused in the field, a lot of research and development at the same time bring anon-excavation and construction of technology-related equipment.A construction technique as a method of pneumatic impact spear method whichcan quickly into the soil in the hole in different formations, and better quality into thehole, you can also make different diameter of the reamer according to needs of theproject. Controllable pneumatic impact spear with motion controllability, which canachieve the freedom of forward and backward functions.Gas distribution and structure principle impact at home and abroad by comparingpneumatic spear, study and analyze the impact of the structural characteristics ofdifferent types of spear, combined with the requirements of construction technology,design a two-way locking controllable impact spear, it can according to the actual soilelastoplastic mechanical properties by adjusting the pneumatic impact spear gasdistribution and supply pressure stroke movement of the piston, so that the impact ofthe impact of the frequency and impact energy spear and the formation of soilmatches for fast, efficient compaction drilling, but also has bi-directional impactfunction movement. In order to ensure a stable and reliable impact spear working conditions, the impact of the spear in the structural design of the locking adjustmentmechanism increases, floating seals and split compaction drill.Gas distribution and structure according to the principle of pneumatic impactspear to gas thermodynamic and kinetic theory, the use of Visual Basic languagedesign and the preparation of the piston motion simulation program, the use ofdynamic characteristics of a program of research and analysis of the internal pistonpneumatic impact spear master piston law of motion, analyze the impact of the maindesign parameters of internal organization. Configuration and regression analysis, todetermine the structure size and impact performance parameters pneumatic impactspear by optimizing parameters.Finite element analysis software, pneumatic impact spear piston and rearconnector analyze static stress, strain, displacement and safety factor, check thestrength of the piston and the rear connector selected material meets the requirementsof the drilling process.