69results about How to "Simple and reliable mechanical structure" patented technology

The invention relates to a large changing diameter double-drag-blade hole reaming drill for deep stratum mineral exploitation and oil gas well underground hole reaming, and solves the problem that a conventional drill cannot change diameter, or the diameter changing range is too small. The technical scheme is that a main cylinder body is in screw thread connection with a lower joint; two drag blades are hinged to hinge supports of the main cylinder body through pin bolts; a rotary cylinder body is sleeved in the main cylinder body; an outer central pipe is sleeved in the main cylinder body; bulge splines at the outer part of the outer central pipe are embedded into a screw groove in the inner part of the rotary cylinder body; three sliding blocks respectively penetrate through three through grooves of the main cylinder body, and are embedded in a ring-shaped groove in the outer part of an inner central pipe; the outer central pipe is connected with the sliding blocks through bolts; the upper part of the inner central pipe is in screw thread connection with a water nozzle; a thrust bearing a is sleeved in the outer central pipe, and is contacted with the rotary cylinder body; a reset spring is mounted on the upper end surface of the thrust bearing a; a baffle ring is in screw thread connection with the outer central pipe; one ends of arch connecting rods are hinged to the rotary cylinder body, and the other ends of the arch connecting rods are hinged to the drag blades; cutting teeth are embedded on the drag blades. The drill is large in diameter changing range, simple to control and reliable in structure, and can be used for the hole reaming operation.

The invention relates to a self-protection wind-driven water lifting system with accelerating vanes. The self-protection wind-driven water lifting system comprises a water lifting mechanism directly driven by a wind power transmission mechanism and is characterized in that the cross sections of the vanes adopt NACA series wing sections, the streamline accelerating vanes are started at a low wind speed and output high torques, the vanes comprise low-speed vane tips and large-torsion vane roots and are divided into twenty cross sections from the vane roots to the vane tips for setting mounting angles, and the cross sections are in smooth transition with each other; a water outlet of a water pump of the water lifting mechanism is connected with a water-out pressure regulating cylinder of a hydraulic speed regulating mechanism. The problems of the traditional wind-driven water lifting system, such as large vane number and low wind energy utilizing rate are solved. The hydraulic speed regulating mechanism is driven to act through the skillful utilization of the water pressure of the water outlet of the water pump under large wind power, the wind power transmission mechanism is controlled to timely respond to yaw, and the purpose of automatically protecting system units is achieved. The self-protection wind-driven water lifting system is suitable for the farmland irrigating application of remote areas lack of electricity resources.