Analysis And Design On Key Mechanism Of Soft Broken Seam Coring Tool

Impact of soft, broken coal quality coring many factors, coring tools, drilling methods, drilling procedures, operator skill levels all have a great impact on the quality of coring, coring tools which coring quality play a leading role. Current coring tools exist in soft, broken when the coal seam coring take heart rate, heart undisturbed coal shortage and poor, unable to meet the requirements of coring, the fundamental reason is the coring tool designed some of the key institutions are still insufficient. Therefore, further study of the key agencies coring tools and optimize the design is to solve the soft, broken seam coring important way of technical problems.From the soft, broken seam drilling geological features and characteristics, analyzes the soft, easy to block coal coring broken heart when, out of the heart easily, easily eroded coal heart problems and other technical reasons; for soft, broken seam common single acting double tube coring tools depth study, through the analysis of its key agencies and improve the design of a good performance, suitable for soft and broken seam of coring tools.Optimized single actuator, the bearing sealing element is completely sealed, so that a single action coring tools more reliable performance; using clamps, kava will close half pipe fastening together the strength and stiffness of the half pipe guaranteed, avoiding the semi-synthetic pipe bursting heart was caused by coal erosion; To solve soft, broken coal difficult card to take heart problems, heart care heart card design agency side of the opening ceremony retainer and cardiac care unit consisting of; in bottom spray inside drill designed watertight ring, so that fluid power drill cavity pointing radial flow is weakened, reducing the fluid erosion heart of coal; and using FLUENT ordinary drills and bottom spray fluid compartment bottom Spray bottom of the drill hole did comparative analysis of the flow field, verify the bottom spray fluid barriers drills more adapted to soft, broken coal coring.Based on the soft, broken seam coring tools of analysis and design of key institutions, made soft, broken seam coring methods to solve technical problems, as well as after the soft, broken heart research tool provides a theoretical basis to take coal and ideas, has a very real sense of exploration and development of coal resources.