43results about How to "Achieve directional movement" patented technology

The invention discloses a preparation method of a magnetic nanometer carrier for immobilized enzyme. The carrier takes nano Fe3O4 as a core and alginic acid alkaline-earth metal salt as a shell; the carrier has the characteristics of being small in particle size, uniform in particle, good in monodispersity, large in specific surface area, good in chemical stability, strong in load capacity, good in biocompatibility, strong in magnetic response and the like. The preparation method of the magnetic nanometer carrier comprises the following steps: (1) preparing nano Fe3O4 in a reverse microemulsion system; (2) adding a sodium alginate solution to a reaction system, mixing evenly, and then adding an alkaline-earth metal salt solution; (3) after reaction is ended, obtaining the magnetic nanometer carrier by separation and purification. The preparation method of the magnetic nanometer carrier related to the invention is mild in reaction condition, simple in preparation, and controllable in carrier particle size and pore structure in the preparation process.

The invention provides a mobile phase change heat transfer and flow performance test device, which consists of a multi-layer frame, a phase change medium loop, a test section, a cooling / heating medium loop and a control system. All components of the test device are all placed in the multi-layer frame by category, universal wheels are mounted at the bottom of the multi-layer frame, so that the test device can realize overall directional movement, the operation is convenient, and the structure is compact. By changing the test section, the test device provided by the invention can be applied to multiple types of heat transfer structures, is especially suitable for micro-channel phase change heat transfer performance test and visualized test, and has strong functionality. During visualized phase change test, the test device is externally connected to a high-speed photographic instrument for image acquisition. When the test device is applied to heat transfer performance testing, the measurement signals of multi-channel temperature, flow, pressure and other key parameters are automatically acquired, processed and analyzed by the control system, the test result is displayed through an operating console screen, and is accurate and visual, and the test process is efficient and intelligent.

The invention discloses an electric power sand throwing fire extinguishing device. The electric power sand throwing fire extinguishing device includes a launch cylinder and a sand loading cylinder, the upper end of the sand loading cylinder is open, the sand loading cylinder is placed in the launch cylinder with an open upper end and can movably axially move along the launch cylinder, and the bottom of the sand loading cylinder is connected to the launch cylinder through an ejection mechanism. The ejection mechanism comprises springs, guide rods and a push plate, the push plate is fixedly connected to the bottom of the launch cylinder and is connected to the multiple guide rods through through holes in a sleeving mode, and both ends of the multiple guide rods are fixedly connected into thelaunch cylinder and are arranged circumferentially and uniformly in the length direction of the launch cylinder. The guide rods are sleeved with the springs, one ends of the springs are fixedly connected to the push plate, and the other ends of the springs abut against the launch cylinder. A mechanical switch is arranged at the bottom of the launch cylinder, the mechanical switch can be clamped onto the push plate after the push plate retracts. According to the electric power sand throwing fire extinguishing device, long distance fire extinguishing is achieved, the service safety is improved,and the electric shock hazard is avoided.

The invention provides an automatic flow stopping device adopting pipe inner pressure. The automatic flow stopping device comprises a valve body, a flow through hole formed in the valve body, and a valve element used for opening and plugging the flow through hole. The medium pressure in a pipe is utilized to push the valve element to automatically move in the flow direction of the medium pressurein the pipe, so that the flow through hole is plugged; acting force outside the pipe is utilized to overcome the medium pressure in the pipe, and the valve element moves in the opposite direction of the flow direction of the medium pressure in the pipe, so that the flow through hole is opened. Automatic plugging from the tail end of a pipeline can be achieved, the automatic flow stopping device utilizes the water pressure in the water pipe, the situation that a tradition water stop valve utilizes a spring to achieve displacement of a stopping piece so as to conduct blocking is not needed, water leakage caused by damage of the spring is effectively avoided, the automatic flow stopping device is simpler in structure, and the water stopping effect is good; and detaching is not required, otherwater taking devices such as a faucet are directly mounted for automatically opening a plug, and when other devices such as the faucet are removed, the plug is automatically plugged.

The invention relates to a reversible emulsifier for oilfield drilling fluid, in particular discloses a recyclable pH value responsive reversible emulsifier for oilfield drilling fluid. The technical solution is that the raw material components include the following: 10%-90% of the water phase, 10%-90% of the oil phase, 1.0%-2.5% of a recyclable pH-responsive reversible emulsifier, and the oil phase is white oil or diesel; the aqueous phase is CaCl at a concentration between 10%‑40% 2 aqueous solution. Its beneficial effect is: the reversible emulsion of the emulsifier has good stability, and after the reversible emulsifier loses its reversible transformation ability after repeated use, the modified magnetic nanoparticles that have lost their reversible transformation ability can be removed by building a high-intensity magnetic field. Separation avoids its influence on the reversible transformation ability of the reversible emulsion system. At the same time, the recovered magnetic nanoparticles can be used as a reversible emulsifier to stabilize the reversible emulsion after acid contact treatment.

The invention discloses an automatic capped fastener positioner. The automatic capped fastener positioner is characterized in that the automatic capped fastener positioner comprises a base plate, a guide seat, a pushing assembly, a guide assembly and a positioning block, the guide seat is fixedly arranged on the base plate and provided with a guide way, the pushing assembly and the guide assembly are respectively arranged on both ends of the guide way, the pushing assembly comprises a pushing rod which can linearly move in the guide way, the end of the pushing rod is a magnetic attracting part, the guiding assembly comprises a positioning plate, which is provided with a conical positioning guide hole, the inlet end and outlet end of the positioning guide hole are respectively aimed at the guide way and the positioning block, and the positioning block is provided with a fastener-positioning hole. The automatic capped fastener positioner can automatically position a fastener, thus making automated continuous batch production possible, moreover, positioning is accurate, the structure is simple, and the automatic capped fastener positioner is easy to put into practice. The automatic capped fastener positioner can directionally move the automatically positioned fastener, consequently, the fastener can be conveniently transferred between two pieces of equipment, and an automated assembly line can be conveniently put into practice.

The invention relates to the technical field of porous processing, in particular to an air compressor cylinder porous processing device with an auxiliary positioning mechanism. It includes a support mechanism and a cylinder set on the top of the support mechanism. The support mechanism includes a support seat. Two connection holes are opened on the front and rear side walls of the support seat. A slide bar is arranged between the front and rear two connection holes. The two sides of the slide bar There is a connecting rod at the end, and the connecting rod is mated with the connecting hole. The left and right side walls of the supporting mechanism are provided with bottom pointer grooves near the top. The outer side of the bottom pointer groove is fixedly connected with the bottom scale plate. positioning agency. In the present invention, by setting the bottom scale plate and the top scale plate, the positions of the bottom scale plate and the top scale plate are fixed and cannot be moved, thus reducing uncontrollable factors, thereby reducing the error generated during measurement, and then improving auxiliary The positioning mechanism aids in positioning accuracy.

The invention discloses ferroferric oxide nanoparticles as well as a preparation method and application thereof, which belong to the field of inorganic nano materials. The preparation method of the ferroferric oxide nanoparticles comprises the following steps: (1) dissolving ferrite and ferric salt in an organic solvent, adding a cosolvent, carrying out ultrasonic treatment, and stirring to obtaina solution A; (2) uniformly mixing a surfactant and a cosurfactant, adding toluene, adding the solution A, adding a NaOH solution, and stirring until the solution becomes transparent and clear to obtain a solution B; (3) adding a dispersing agent and an alkaline additive into the solution B to adjust the pH value, and stirring to obtain a microemulsion; and (4) adding NaHCO3 into the microemulsion, carrying out aging treatment, centrifuging, carrying out suction filtration, washing, separating, and drying to obtain the ferroferric oxide nanoparticles. According to the invention, enzyme is immobilized by adopting a covalent coupling method, so that directional movement of an external magnetic field can be realized, enzyme pollution is avoided, and the biological activity of the enzyme is not changed.

The invention discloses a movable tool box with a function of soaking ceramic tiles, comprising a cuboid box body I, a cuboid box body II and a connecting body for connecting the box body I and the box body II, wherein the connecting body has a sectorial cross-section; the box body I is formed by connecting a bottom plate I, a front side plate I, a rear side plate I, a left side plate I and a right side plate I; the front side plate I, the rear side plate I, the left side plate I and the right side plate I are respectively and fixedly connected with the bottom plate I in a sealing way; the right side plate I is fixedly connected with the connecting body by glue; the connecting body has a cambered surface; the box body II is formed by connecting a bottom plate II, a front side plate II, a rear side plate II, a right side plate II and a top plate II; the bottom plate II, the front side plate II, the rear side plate II and the top plate II are respectively and fixedly connected with the right side plate II in athe sealing way; the bottom plate II is fixedly connected with the connecting body by glue. The mobile tool box with the function of soaking the ceramic tiles is convenient and effective to use and is capable of effectively increasing construction efficiency.

The invention provides an automatic sewing lock hole. The automatic sewing lock hole comprises a working platform, a flattening device is arranged on one side of the upper surface of the working platform, the flattening device comprises a protective shell, a plurality of mounting plates are arranged on one side of the inner wall of the protective shell in parallel at equal intervals, and a motor is arranged on one side, away from the inner wall of the protective shell, of each mounting plate. One side of the outer wall of a shell of each motor is connected with each mounting plate, a connecting opening is formed in the side, away from each mounting plate, of the outer wall of the shell of each motor, a driving shaft is arranged in each connecting opening, a threaded rod is arranged at theend, away from the corresponding connecting opening, of each driving shaft, a push rod is arranged at the end, away from the corresponding driving shaft, of each threaded rod, and each push rod is connected with the corresponding thread rod through thread holes. By means of the flattening device, clothes are flattened, the situation that deviation occurs due to inaccurate size caused by uneven stress of manual operation is avoided, the working efficiency and the quality of the clothes are improved, and certain practical value is achieved.