Abstract: The present disclosure discloses an unmanned aerial vehicle and a wing thereof. The wing includes an intermediate wing assembly, configured to connect to a fuselage of an unmanned aerial vehicle; an outer wing, arranged corresponding to the intermediate wing assembly and located on a side of the intermediate wing assembly away from the fuselage when the outer wing is in an unfolded state; and a folding apparatus, including a driver and a first rotating shaft, the driver being connected to the intermediate wing assembly and the first rotating shaft including a first rotating portion and a first fixed portion that are rotatably connected, the first fixed portion being connected to the intermediate wing assembly and the first rotating portion being connected to the outer wing, the first rotating portion being further connected to an output end of the driver, to rotatably connect the outer wing and the intermediate wing assembly.

Abstract: The present disclosure discloses an unmanned aerial vehicle. The unmanned aerial vehicle includes a wing and a fuselage that are detachably connected to each other, a first protruding portion and a second protruding portion are formed at a position of the fuselage that corresponds to the wing, the first protruding portion and the second protruding portion are arranged opposite to each other, a mounting groove configured to accommodate a middle portion of the wing is formed between the first protruding portion and the second protruding portion, a mounting hole is formed on the first protruding portion and/or the second protruding portion, a pin hole is formed at a position of the middle portion of the wing that corresponds to the mounting hole, an index pin is arranged on the fuselage, the index pin is fixed on the first protruding portion and/or the second protruding portion, the index pin includes a bolt, and the bolt partially runs through the mounting hole and extends into the pin hole.

Abstract: The present invention relates to the technical field of chemical industry, and in particular to a method for purifying ethylene carbonate through dynamic crystallization, which includes the following steps: adding an ethylene carbonate-containing raw material into a cavity of a crystallization device under a condition of stirring for dynamic crystallization, wherein the crystallization device further includes a jacket attached and circumferentially disposed along the outer wall of the cavity, the jacket is provided with cooling water therein, a temperature of the cooling water is 1-2.5° C. lower than the temperature in the cavity until a granular ethylene carbonate crystal is generated. The present invention using a rake dryer as the crystallization device to realize dynamic crystallization at a certain rotating speed. The technical solution is simple to operate and short in processing cycle, which facilitates improvement in production efficiency and product quality and is suitable for industrial application.

Abstract: A method and device for controlling a flight of an unmanned aerial vehicle (UAV) is provided. The UAV includes a fuselage, two wings, two supporting arms, two rotor wing structures, two second power modules, two third power modules, two steering modules, a lifting module, an altitude sensor, and a speed sensor. The two wings are fixed to the fuselage, the supporting arms are fixed to the wings, the rotor wing structure includes a first power module and a driving module, the driving module of the rotor wing structure is fixed to the supporting arm, and the driving module is configured to drive the first power module to rotate such that the first power module switches between the level flight mode and the lifting mode.

Abstract: The present invention relates to the technical field of chemical industry, and in particular to a method for purifying ethylene carbonate through dynamic crystallization, which includes the following steps: adding an ethylene carbonate-containing raw material into a cavity of a crystallization device under a condition of stirring for dynamic crystallization, wherein the crystallization device further includes a jacket attached and circumferentially disposed along the outer wall of the cavity, the jacket is provided with cooling water therein, a temperature of the cooling water is 1-2.5° C. lower than the temperature in the cavity until a granular ethylene carbonate crystal is generated. The present invention using a rake dryer as the crystallization device to realize dynamic crystallization at a certain rotating speed. The technical solution is simple to operate and short in processing cycle, which facilitates improvement in production efficiency and product quality and is suitable for industrial application.