7results about How to "Jet stability" patented technology

The present application relates to the field of micro-droplet jet and inkjet technology, and particularly relates to an acoustic driving micro-droplet jetting method and device, which comprises: stably delivering a liquid to be jetted to a nozzle micro-hole assembly; generating an ultrasonic signal, which drives an ultrasonic transducer after power amplification; driving the resonant acoustic cavity nozzle through the ultrasonic transducer to form a stable sub-wavelength scale standing wave acoustic field in the cavity; using the acoustic radiation force to act on the liquid column at the end of the nozzle to realize the non-contact separation and directional jetting of the droplet; and moving the nozzle on the substrate through a multi-axis motion platform to realize the deposition of the droplet according to a predetermined track. The method and device avoid the nozzle blockage and other problems caused by the high viscosity or high solid content of the liquid in the traditional piezoelectric or electrohydrodynamic driving mode; can significantly improve the control accuracy of the droplet size and jetting speed, have excellent fluid adaptability and jetting stability, and are particularly suitable for the precise deposition and patterning jetting of complex fluids such as photoresist, metal paste and functional nanomaterials.

The utility model discloses a kind of obstetric flushers, including liquid storage tank, connecting pipe, extension piece, direction-changing arm and spray head, liquid storage tank includes the tank body for storing cleaning fluid and is set to the pressing portion of tank body tail end, pressing portion is corrugated structure, with good elasticity and resilience, tank body opening end is connected connecting pipe and extension piece in turn by thread, extension piece one end is equipped with rotatable direction-changing arm, direction-changing arm one end is equipped with locating head and input hole, the other end is connected with spray head, liquid can be in palm pressing pressing portion after via passage and input hole into direction-changing arm and from spray head to spray to realize flushing function, the extension piece outside is provided with accommodating groove for folding storage direction-changing arm, connecting pipe outside is equipped with antiskid structure to facilitate operation, structure design is reasonable, connection is stable, spray direction is adjustable and convenient to store.

The invention provides a curved surface array electrofluid nozzle control method, and relates to the technical field of electrofluid jet printing, and the method comprises the steps: processing a to-be-jet-printed image, and generating dot matrix data; nozzle opening and closing control information is generated according to the dot matrix data; generating a multi-channel nozzle driving control signal according to the nozzle opening and closing control information; in the process of outputting a multi-channel nozzle driving control signal to drive a target nozzle, under the unified space kinematics constraint and the injection time sequence constraint, controlled injection of the target nozzle under the curved surface condition is achieved by cooperatively executing track generation, injection trigger control and interference constraint control. The high-precision jet device can meet the high-precision jet requirement under the complex curved surface condition.

The application provides a water-soluble support material and a preparation method and application thereof, and relates to the technical field of 3D printing materials. The water-soluble support material comprises, in terms of mass fractions, 30-45 parts of polyether-based diisocyanate, 30-40 parts of a water-soluble monofunctional monomer, 5-20 parts of a water-soluble organic solvent, 5-15 parts of an emulsifier and 1-10 parts of a photoinitiator. The polyether-based diisocyanate contains free isocyanate groups, can react with water to generate gas in a water washing process, construct a pore channel in situ in the support structure, significantly accelerate the penetration and dissolution of water, and realize the rapid removal of the support material. Meanwhile, the water-soluble support material has excellent inkjet adaptability, ensures stable jetting in the printing process, good interlayer bonding, clear and complete shaping, and is suitable for the synchronous support construction and efficient post-processing of complex models in inkjet 3D printing.

This application relates to a river ecosystem management device, belonging to the technical field of river ecological restoration and environmental protection. It includes a float, with a deployment mechanism on the outside of the float, a moving mechanism on the top of the float, and a catching mechanism on the bottom outer side of the float. The deployment mechanism includes a storage tank, the outside of which is opened inside the float. An extraction tube is fixedly connected to the top inner side of the float, and a retrieval tube is slidably connected inside the extraction tube. A docking assembly is fixedly connected to the top outer side of the extraction tube, and a metering tube is fixedly connected to the top of the retrieval tube. This application features a vertically movable retrieval tube that, when sliding within the extraction tube, utilizes the principle of pressure difference to extract the treatment material from the storage tank. The material is extracted to the metering tube for volume control, thereby achieving the effect of stably spraying the treatment material into the river after quantitative control.

A reducing agent injection quantity accurate control device based on an SCR system is characterized in that a reducing agent storage box (1) is communicated with a supply pump (2), the supply pump (2) is communicated with a reducing agent pressure stabilizing pipeline UR and a pressure stabilizing valve (33), a plurality of branches are led out of the reducing agent pressure stabilizing pipeline UR, each branch is provided with a flow meter (4), a reducing agent supply electromagnetic valve (10) and an injection regulating valve (5) and then connected with a spray gun (6), and the spray guns (6) are inserted into an exhaust pipeline (7); the compressed air pressure stabilizing pipeline AR is provided with pressure regulating valves (34) which are communicated with a plurality of branches led out of the reducing agent pressure stabilizing pipeline UR in a one-to-one correspondence mode, the compressed air pressure stabilizing pipeline AR is communicated with a compressed air electromagnetic valve (8) and a spray gun (6), and a spray gun purging electromagnetic valve (9) is further connected between the compressed air pressure stabilizing pipeline AR and the reducing agent pressure stabilizing pipeline UR. The device can ensure the pressure stability of the reducing agent and the auxiliary injection compressed air on the basis of effectively reducing the equipment cost, so that the injection precision and the atomization effect are ensured.

The invention provides a single cell sorting and printing integrated device and method. The device comprises a shell structure, an X-axis displacement mechanism, a Y-axis displacement mechanism, a printing head, a first visual module, a second visual module, a carrying table and a control module. The X-axis displacement mechanism and the Y-axis displacement mechanism are installed on the shell structure, and the Y axis is located below the X-axis displacement mechanism. The printing head is arranged on the X-axis displacement mechanism, a printing chip for realizing liquid injection through thermal bubbles is arranged on the printing head, the printing chip is provided with a plurality of nozzles which are independently controlled, and a liquid adding port of the printing head is open and forms a straight-through liquid path with the nozzles. The first visual module is installed on the X-axis displacement mechanism with a lens facing downwards, and the second visual module is installed on the Y-axis displacement mechanism with a lens facing upwards. And the carrying table is arranged on the Y-axis displacement mechanism and is provided with the pore plate. The control module is electrically connected with the X-axis displacement mechanism, the Y-axis displacement mechanism, the printing chip, the first vision module and the second vision module. According to the application, high-efficiency cooperation of single cell sorting, micro liquid sample application and cell printing is realized, and a closed-loop process from cell screening, waste liquid treatment to printing is completed.