2results about How to "Solve the plugging" patented technology

The utility model discloses an automobile safety air bag impact test tool, comprising a rigid substrate which is fixedly installed on a test bench backboard and is provided with a metal net installation window at the position of an exhaust hole of a safety air bag; the metal net is arranged in the metal net mounting window; the airbag fixing bracket is arranged on the rigid base plate and is used for fixing a safety airbag on the rigid base plate; and the hammer head is positioned above the rigid base plate and is used for impacting the safety air bag in an impact test. The safety air bag impact test device solves the problem of hole blocking in the impact test of the safety air bag, is convenient to process, low in cost, easy to detach and replace, and suitable for the impact test of various safety air bags with exhaust holes.

This invention discloses an anti-clogging drill rod with a synergistic effect of mechanical scraping and pulsed airflow, and its drilling method, belonging to the technical field of coal mine gas drainage drilling equipment. The anti-clogging drill rod mainly consists of a drill rod body and a coaxially fitted outer casing. The drill rod body contains a directional pulsed airflow duct and nozzle, while the outer casing is equipped with elastic scraping teeth, a pulverized coal inlet, and a crushed coal and stone inlet. The drilling method includes the following steps: equipment system preparation and connection, directional drilling, gas-water mixing and slag removal, equipment system debugging and preheating, torque sensor calibration, synergistic drilling, intelligent control, synergistic finishing, and acceptance evaluation. This invention solves the core problem of pulverized coal agglomeration and drilling interruption in pulverized coal seam drilling through the synergistic effect of the drill rod's self-cleaning structure and directional pulsed airflow. It is compatible with existing mainstream drilling rigs and provides technical support for efficient gas drainage from deep pulverized coal seams.