3results about How to "Improve technical indicators" patented technology

The application provides a variable configuration short take-off and landing unmanned aerial vehicle based on upper surface blowing lift increase and a method, which comprises a variable nose module and an unmanned aerial vehicle body; when the variable nose module is in the original position, the short take-off and landing unmanned aerial vehicle is in a blended wing body layout; when the variable nose module is lifted upward and forward relative to the unmanned aerial vehicle body to the position, the short take-off and landing unmanned aerial vehicle is in a canard layout, so that the configuration conversion of the short take-off and landing unmanned aerial vehicle between the blended wing body layout and the canard layout is realized. The short take-off and landing design of the application is based on the upper surface blowing lift increase and the jet control principle, the variable layout conversion between the canard layout and the blended wing body layout is realized through the simple actuation of the nose, the take-off and landing distance can be significantly shortened, the hovering and combat performance is more excellent, the variable layout design integrates the aerodynamic advantages of multiple overall layouts, and each technical index of the aircraft can be significantly improved to cope with future combat requirements.

This invention discloses a horizontally mounted piston-airbag type water hammer protection tank for water hammer protection in water supply systems. The tank body has an inner tank, separating an inner cavity from an outer cavity. The inner tank is further divided into left and right inner cavities by left and right partitions, with a piston cylinder and an airbag cylinder respectively installed at each end. The left and right pistons reciprocate within the cylinders in a sealed manner. The matching left and right telescopic airbags, composed of soft bag-like structures and multi-rod telescopic joints, move intermittently within the airbag cylinders, forming completely isolated air pressure and hydraulic chambers, achieving gas-liquid separation and heat insulation. A float assembly is installed at the bottom of the tank, and a circulating water nozzle is located at the top, connected downstream of the water pump check valve. A bottom-side spray nozzle is aligned upstream of the check valve via a first ejector. A water supply branch pipe connects to the main water supply pipe via an inlet ball valve and a second ejector. This device replaces the traditional waterbag structure with a piston-airbag synergy, solving the defects of waterbag rupture and the need for continuous air replenishment in air compressor-type systems, thus improving the reliability and energy efficiency of water hammer protection.

The application relates to the technical field of atomic gas chamber manufacturing, in particular to a vacuum heating reduction preparation system of alkali metal elements. The vacuum heating reduction preparation system of alkali metal elements comprises a reaction container, a glass vacuum device, a first heating piece, a second heating piece and a temperature control device. The glass vacuum device comprises a glass diffusion pump and a mechanical pump, one side of the glass diffusion pump is connected with the reaction container, and the other side is connected with the mechanical pump. The first heating piece is used for heating the mixed materials in the reaction container, and the second heating piece is used for baking and degassing the reaction container. The temperature control device is electrically connected with the first heating piece and the second heating piece. The glass diffusion pump is used as a main pump, which is beneficial to removing the gas in the system before the reaction and the gas generated during the reduction reaction, improves the ultimate vacuum degree of the system, and obviously enhances the alkali metal vapor corrosion resistance of the glass vacuum device compared with the metal vacuum device. After long-term use, the vacuum degree of the system is reduced little, and the high-purity alkali metal elements meeting the vacuum filling of the atomic clock atomic gas chamber can be stably prepared.