2results about How to "With modular design" patented technology

The utility model provides a single disc type hill drop planter performance test test bench, including mechanical frame, negative pressure fan, profiling adjusting device, single disc type hill drop planter and positive pressure air pump. Mechanical frame is the support main part, and the front end installation negative pressure fan provides adjustable seed taking negative pressure, and the middle part is suspended through the elastic profiling adjusting device hill drop planter and realizes the dynamic regulation of sowing depth, and the rear end is provided with positive pressure air pump and supplies the seed cleaning and seed throwing airflow. Test bench is equipped with digital pressure monitoring system, can real -time acquisition negative pressure seed taking and positive pressure seed throwing parameter, accurate simulation sowing process under different soil working condition, realizes sowing depth, air pressure and seed throwing track multi -parameter synchronous observation, has the characteristics such as flexible adjustment, data intuitionistic, provides efficient test platform for hill drop planter performance research.

The application belongs to the technical field of drilling riser and discloses a modularized drilling riser capable of being quickly spliced, which comprises a water pipe body, an upper flexible joint is arranged on the upper end of the water pipe body, and a lower flexible joint is arranged on the lower end of the water pipe body, a multi-section water pipe body structure is arranged, and a buoyancy section is detachably arranged between the adjacent two sections of the water pipe body, the first connecting ring of the water pipe body is butted with the second connecting ring of the buoyancy section, the toothed rubber ring between the first connecting ring and the second connecting ring is engaged, at the moment, the two half rings of the clamp are combined, the annular groove formed in the inner side of the clamp is wrapped outside the first connecting ring and the second connecting ring, the slope rubber ring in the annular groove is abutted with the first connecting ring and the second connecting ring, and the corrosion-resistant sealing ring maintains the sealing property of the connection between the single section of the water pipe body and the buoyancy section.