4results about How to "Replaceable" patented technology

The utility model relates to a fuel cell stacking tool. The device comprises a stacking bottom plate, a positioning assembly, an air tightness test plate, an adjusting knob, an adjusting platform and a crossbeam; the positioning assembly is composed of a positioning embracing column and a positioning rod; the stacking bottom plate is provided with the positioning embracing column, the positioning embracing column is connected with the positioning rod, and the positioning rod is connected with the crossbeam; the air tightness test plate is fixed on the stacking bottom plate through the positioning embracing column; one side of the positioning embracing column is provided with the adjusting platform, the adjusting platform is provided with the adjusting knob for adjusting the backward or forward movement of the positioning embracing column; the positioning embracing column and the stacking bottom plate are provided with the adjusting knob for adjusting the inclination direction of the positioning embracing column. In the utility model, each component is modularly designed, convenient to disassemble and assemble, and can be compatible with the size change of the small range of the electric pile and the stacking requirement of different numbers of sheets, thereby achieving the effect of saving time and labor in the research and development stage.

The application discloses a manned-unmanned aircraft cooperative operation formation collision avoidance control method, and belongs to the technical field of aircraft cooperative control; the method adopts a hierarchical architecture separating performance layer and safety layer: the performance layer generates nominal instructions for tracking operation slots by model predictive control; the safety layer filters threats in real time based on collision cones, and converts collision avoidance conditions into linear inequality constraints about unmanned aircraft acceleration by using control barrier functions. By setting hierarchical safety parameters for unmanned aircraft-manned aircraft interaction and unmanned aircraft-unmanned aircraft interaction, and imposing hard constraints on the former and soft constraints that can be relaxed on the latter in solving, the absolute safety priority of manned aircraft is ensured. The application realizes effective decoupling of high-performance formation tracking and real-time autonomous collision avoidance, improves the real-time performance and reliability of the system while ensuring safety, and is suitable for large-scale cooperative operation tasks.

The present application relates to a kind of ultra-low temperature disc valves, it has set valve seat sealing structure in valve body;Along the preset axis of valve body, set valve stem;One end of valve stem is fixed butterfly valve sealing structure;Butterfly valve sealing structure and valve seat sealing structure keep sealed when valve stem rotates to, the state of ultra-low temperature disc valve closing, it is convenient to replace the sealing structure between valve body and valve seat, solve the sealing performance requirement of the sealing structure between valve body and valve seat in the existing ultra-low temperature disc valve is higher and higher, simultaneously, require the sealing structure between valve body and valve seat to have replaceability, the sealing structure of original ultra-low temperature disc valve cannot dismount the sealing structure between valve body and valve seat, only the valve body and valve seat of integral replacement, so as to cause the waste of resources, cause the increase of cost technical problem.

The utility model relates to the technical field of high-temperature-resistant plant tents, and particularly discloses a mutually-spliced high-temperature-resistant plant tent which comprises a frame and tarpaulin with changeable layers, and the frame and the tarpaulin can be spliced mutually. The frame comprises a main frame, transverse frames and longitudinal frames, wherein the transverse frames and the longitudinal frames are arranged in the main frame and form a plurality of splicing areas used for being connected with the tarpaulin. The tarpaulin comprises an outer frame detachably connected with the splicing area, a plurality of replaceable tarpaulin layers arranged in the outer frame and a fixing assembly arranged on the outer frame and used for fixing the tarpaulin layers. The service life of the tarpaulin cannot reach the use expectation due to the fact that the temperature difference between day and night is large, and the cost is high due to the fact that the whole tarpaulin needs to be replaced finally.