Design Of A Hole Opening And Coring Rescue Subsidiary Tool

Urban earthquake are little probability natural catastrophe,and the earthquake rescue equipment is relatively backward and poor,in our country.It is difficult to develop the special earthquake rescue equipment,because of high maintenance cost,long idle period,and so on.Engineering machinery has been widely used in our daily life and production.The better application of general engineering machinery in earthquake relief is a new development direction of large earthquake rescue equipment,and is also suitable for earthquake disaster in China.Research and development of multi-function rescue tools,which can be quickly docked with the engineering machinery through a quick change device,can make the general engineering machinery quickly converted to earthquake rescue machinery for earthquake rescue.A rescue subsidiary tool is designed to fast open a large diameter hole on reinforced concrete building,when there is a large cement board that is temporarily unable to be removed in seismic ruins,and trapped personnel need urgent rescue.To a certain extent,it protects the safety of the rescue workers.Also,it is of great significance for the rescue of the wounded and the development of earthquake rescue equipment.Firstly,the research background of this project and the development status of rescue equipment at home and abroad are expounded,and the existing forcible entry technology and tools are introduced and analyzed,a plan using hydraulic wall saw as forcible entry tool is proposed according to the forcible entry requirements.Follow the plan,a hole opening and coring rescue subsidiary tool is designed and the modeling is completed,then some standard parts of the tool are selected,and some related technical parameters are computed.Secondly,in order to verify the feasibility of design scheme,statics and dynamics analysis are done on the key stressed components——holding paw and turntable of the tool.In addition,the strength of the paw is verified when it works in horizontal,and the forces analysis of the wall saw is done.Considering the coupling of inertia force and sawing force,the ADAMS simulation analysis is done,then the strength of turntable is verified,which lays a foundation for subsequent optimization analysis.Then,the key parts are optimized using ANSYS Workbench,relevant optimal structure parameters are got,and considering possible adverse conditions,corresponding aided design is done in order to enhance the reliability.In addition,the finite element modal analysis is carried out on the machine,the first 6 modal characteristics are got,so that resonance in the process of work is avoided.Finally,in order to realize the motion control of the hole opening and coring rescue subsidiary tool,hydraulic transmission system of the machine is designed,and the selection of related control elements is completed.