38results about How to "Size can be adjusted" patented technology

The process of preparing composite particle of hollow nanometer conductive polypyrrole-silica ball includes the following successive steps: adding pyrrole monomer and nanometer silica ball into deionized water and dispersing ultrasonically; and introducing initiator to react at 100-180 deg.c to obtain the composite particle. Compared with available technology, the process of the present invention has the advantages of less intermediate steps, low cost, capacity of obtaining product with high size homogeneity and controllability, and other advantages.

The invention relates to the technical field of fire security and in particular discloses a small-size multifunctional size-adjustable tunnel train two-purpose fire hazard experiment platform and an experiment method thereof. The experiment platform comprises a tunnel main body, an iron rack, a fire source simulation system, a ventilation system and a monitoring system, wherein the overall experiment platform is mounted and placed in a large wind tunnel; the tunnel main body comprises multiple sub-carriages of a same structure in a spliced manner; the fire source simulation system comprises porous gas combustors, a gas flowmeter, a fuel gas vessel and a gas supply tube; the porous gas combustors are mounted at combustion openings in the bottoms of the sub-carriages; the ventilation systemcomprises an external wind tunnel as well as a small variable-frequency fan and a rectification tube section which are connected with a model; the monitoring system comprises a temperature testing system, a flue gas flowing testing system, a digital camera recording system and a computer connected with the digital camera recording system.

The invention discloses a preparation method of a composite material of water-soluble folic acid-functionalized up-converted nano particles (FA-UCNPs) and graphene oxide (GO). The preparation method mainly comprises the three steps of preparing FA-UCNPs, namely firstly, synthesizing diethylene glycol-modified up-converted nano particles (DEG-UCNPs), and secondly, synthesizing the FA-UCNPs; preparing GO, namely firstly, preliminarily oxidizing a graphite sheet, oxidizing, and synthesizing the GO which is good in water solubility, high in yield and adjustable in size; and preparing FA-UCNPs / GO, namely dispersing FA-UCNPs and GO with a weight ratio being 1 / 1-1 / 2, vibrating for 10min, and drying under the normal temperature in a vacuum condition, so as to obtain the FA-UCNPs / GO. The FA-UCNPs / GO prepared by adopting the method is good in water solubility and stability and can be used for identifying canceration cells as a biological probe, so that the composite material is very good in application prospect for early diagnosing of cancers.

The invention discloses a three-dimensional anti-shake displaying method. The method includes: reserving a non-image-display area in a display screen in the initial state; detecting whether the display screen rotates or not; and if yes, regulating an image of a display area in the display screen so as to keep the shape of the image observed at an observation point unchanged. By the use of the three-dimensional anti-shake displaying method, when the display screen rotates, the shape of the image observed in the display screen can be kept unchanged, so that displaying effect of the image is improved.

The invention discloses a device for preparing gratings with different periods and a using method thereof, and relates to the field of micro-machining. The device comprises a guide rail base, a transmission shaft, a bearing slide block, a PDMS fixed cover plate and a limiting side plate. When the device is used, the structured surface of the grating PDMS soft template is upwards fixed on the device bearing part, the bearing slide block moves away from the fixed part by adjusting the transmission shaft; the PDMS soft template is stretched so that the size of the periodic structures on the softtemplate is increased. The structured surface of the PDMS soft template is coated with the curing adhesive, a substrate is placed on the curing adhesive, then the adhesive is cured through a heating or exposure method, and the PDMS soft template is stripped after the adhesive is cured so as to obtain a grating structure with a required period on the substrate. Grating structures with different period sizes can be obtained by changing the stretching amount of the soft template. The device is easy to operate and convenient to use and can meet the requirement of copying gratings with different periodic sizes in batches at low cost.

The invention discloses a bottle sleeve device with a warning function. The bottle sleeve device comprises a bottle sleeve, wherein the bottle sleeve and a warning operating column are movably connected; a bottleneck foxing strip is fixedly connected to one end of a vertical foxing strip; a bottleneck clamping block is fixed at one end, far away from the vertical foxing strip, of the bottleneck foxing strip; one end of a traverse foxing strip is fixed on a sliding column; a connection block is fixed on the sliding column; a pothook is fixedly connected to the connection block; a pulling rope is movably arranged on a fixed pulley; one end of the pulling rope is fixed on the sliding column; an extrusion column is fixed on the other end, far away from the sliding column, of the pulling rope;a fixed block is fixedly arranged on the extrusion column; the fixed block is provided with a through hole; a spring is arranged in an intracavity of the fixed block. The invention provides the bottlesleeve device with the warning function, the warning is performed when a liquid medicine is completely transfused so as to avoid other hidden dangers such as blood return; moreover, the size of a bottleneck card slot is adjustable, and the bottle sleeve can adapt to a glass transfusion bottle, a plastic transfusion bottle and a plastic transfusion bag in different specifications.

The invention discloses a method for preparing ultrafine cross-linked PMMA (polymethyl methacrylate) microspheres narrow in particle size dispersion. The method includes steps: adding a stabilizing agent, methyl methacrylate and an initiator into a dispersion medium of absolute ethyl alcohol and water, stirring to dissolve completely, and heating to 70 DEG C; after reaction for a period of time under the action of ultrasonic waves, adding a cross-linking agent for dispersion polymerization reaction; filtering, washing and drying to obtain monodisperse micron cross-linked PMMA microspheres, namely the ultrafine cross-linked PMMA microspheres narrow in particle size dispersion, wherein the microsphere particle size D50 is 2-4micron. The method is simple in reaction process, free of environment pollution organic solvents, few in types of raw materials, simple in postprocessing and low in preparation cost, the microsphere particle size is adjustable, and the obtained monodisperse micron cross-linked PMMA microspheres great in sphericity degree can be applied to LED (light emitting diode) lampshades to achieve light diffusion effects.

The invention discloses a method for fixing metal oxide by using polyurea microcapsules, the steps of the method are provided as follows: forming solution A by adding 1 to 10 weight parts of surfactant I into 10 to 50 volume parts of deionized water; forming suspension B by ultrasonically dispersing for 20 to 30 minutes after adding 1 to 10 weight parts of diisocyanate, 0.1 to 1 weight parts of metal oxide and 1 to 10 weight parts of surfactant II into 5 to 30 volume parts of organic solvent; pumping the suspension B into a sprayer with a peristaltic pump by taking N2 as the carrier gas, and forming stable O / W emulsion liquid by spraying the solution A after the atomization and simultaneously fast interfacial polymerization happens; obtaining solid powders through vacuum concentration; washing the solid powders in ethanol and acetone, thus obtaining the polyurea microcapsules of the fixed metal oxide after natural drying. The method of the invention has the advantages of simple process, easy operation, low cost, low damage rate and the controllable particle size of the microcapsules of 2 to 60 Mum, etc.

The invention discloses an automobile emergency auxiliary braking device and an automobile emergency auxiliary braking method. The automobile emergency auxiliary braking device comprises an electronic control unit, a wheel speed sensor, a braking pedal displacement sensor and an auxiliary speed reduction module. The electronic control unit monitors a wheel speed signal of an automobile and a displacement signal of a braking pedal in real time in work, if the conditions that a driver depresses the braking pedal and the wheel speed does not change are detected, the fact that a service braking system of the automobile loses efficacy is confirmed, the electronic control unit sends a power-on instruction to an electromagnetic chuck, the braking and the deceleration are realized through the friction between a friction disc and a friction block on a counter gear; when the automobile runs normally and the braking of the service braking system works normally, the electromagnetic chuck is powered off, and the normal running of the automobile is not interfered. The automobile emergency auxiliary braking device is simple in structure, easy in installation, good in heat dissipation performance and reliable in work, and the braking process is guaranteed to be stable when the service braking of the automobile running at a high speed loses efficacy.

The invention relates to an automatic DC / AC wire winding and bundling machine. The automatic DC / AC wire winding and bundling machine is characterized by comprising a rack, a vertical frame, a rotation winding part, a motor assembly, a DC / AC wire end portion wire clamping part, a grabbing pneumatic clamp, an X / Z direction moving part, a grabbing screwing pneumatic clamp, a Z direction vertical moving part, a wire feeding / clamping pneumatic clamp, a Y direction horizontal moving part, a ribbon part and a ribbon moving part; the DC / AC wire end portion wire clamping part and the rotation winding part are matched to wind a DC / AC wire into a coil; the X / Z direction moving part drives the grabbing pneumatic clamp to horizontally move in the X direction and vertically move in the Z direction; the Z direction vertical moving part drives the grabbing screwing pneumatic clamp to vertically move in the Z direction; the Y direction horizontal moving part drives the wire feeding / clamping pneumatic clamp to move to the position below the grabbing pneumatic clamp or below the grabbing screwing pneumatic clamp; and the ribbon moving part drives the ribbon conveying part to make an output port of the ribbon conveying part located above the wire feeding / clamping pneumatic clamp. The automatic DC / AC wire winding and bundling machine has the beneficial effects that the DC / AC wire can be wound into the coil, a bundled wire is cut into a ribbon with the needed length, and the production efficiency is improved.

The invention relates to a sitting gesture corrector and a desk with the same. The sitting gesture corrector comprises guide rods and pedals; through holes are formed in the lower portions of the pedals; the guide rods penetrates through the through holes; the pedals are of a separated structure and comprise a front pedal and a rear pedal; an extension block is arranged between the front pedal andthe rear pedal; the rear pedal, the extension block and the front pedal are connected to be integral through bolts. Notches are formed in the surfaces of the pedals; the bottoms of the notches are provided with contact sensors; buzzers are arranged on the pedals; a middle limiting baffle block is arranged at the middle of each guide rod in the lengthwise direction; the two ends of each guide rodare connected with support beams. The sitting gesture corrector is simple in structure, and when a student reads and writes daily, he / she can keep a correct sitting gesture and maintain the head straight, the body unbent, the arms spread and the feet flat by using the support. The sitting gesture corrector can help the student to develop a good sitting gesture habit when in use for a long term, humpback and shortsightedness are effectively avoided, and healthy development of the body is ensured.

The invention relates to a small block model pressing equipment for simulating a rock mass structure, and belongs to the technical field of a geomechnical model test. the equipment comprises a frame base, and a small block mold, an upper mold ejection block, a push-pull cover board, a pressure lever and a range draw bar which are fixed on the frame base; the small block mold and the push-pull cover board are arranged at the upper surface of the frame base; the upper mold ejection block is arranged at the lower part of the small block mold; the upper end surface of the upper mold ejection block is inserted into a cavity of the small block mold for simulating a rock mass; and the range draw bar is arranged at one end of the pressure lever. By adopting the small block model pressing equipment, the fabrication speed of a small block model can be greatly fastened; the quality of the small block model is improved; manpower and material resources are saved; meanwhile, the size, the shape and the height of a small block can be adjusted according to the requirements; and the smooth execution of the geomechnical model test is guaranteed.

The invention provides a triple anti-theft safety lock catch, which comprises a lock shell, a shell cover, an electrically controlled induction lock device, a mechanical combination lock device, a fixed button and an emergency alarm device, and is characterized in that the front of the lock shell is provided with a display film at the middle-up part, two sides of the lock shell are provided with volume key holes, and the top end is provided with a groove; the front of the lock shell is provided with the electrically controlled induction lock device and the mechanical combination lock device at the bottom part, the shell cover is installed at an opening at the bottom part of the lock shell, the fixed button is fixed at the back of the lock shell, and the emergency alarm device is integrated inside the lock shell. The safety lock catch provided by the invention adopts triple locking coordinate setting and mechanical and electrical integration control, combines advantages of a mechanical structure and a control principle, and can end mobile phone loss at an un-occurred state while not affecting people to take along a mobile phone conveniently.

The invention discloses a method for synthesizing TS-1 zeolite through size-adjustable solvent-free method, and the method comprises the following steps of: grinding a silicon source and a water-containing organic template agent in a mortar to a particle size of 0.5-1microm, then adding a pure silica zeolite seed crystal and a titanium source, further performing grinding until the particle size is 0.1-0.5microm, then putting the mixture in a reaction kettle for crystallization reaction, and carrying out suction filtration, drying and calcining on the obtained product to obtain the TS-1 zeolite. Compared with a hydrothermal method, regulation of the particle size of the TS-1 zeolite does not need to change the proportion of the raw materials, crystallization reaction temperature and time, only the size of the pure silicon zeolite seed crystal needs to be changed, when TS-1 zeolite with different sizes is synthesized, any synthesis condition does not need to be changed, the operation is simple and safe, and the method is suitable for industrial large-scale production.

The invention discloses a direct-current droplet generator and a preparation method thereof. The generator is characterized in that the generator has a structure in which all electrodes are placed above a solid surface and do not need to be grounded, so that the direct-current liquid drop generator can be constructed on any surface including a block body, a thin film and a coating; the droplet generator structure comprises a solid hydrophobic surface, an upper electrode, a collector pin, a lower electrode, an upper electrode lead and a lower electrode lead. The solid surface is a hydrophobic surface made of any artificial or natural materials, the upper electrode and the lower electrode are placed on the solid surface at a certain interval, the current collecting needle can be of an independent conductive tip structure and can also be directly machined on the electrode, and the generator can collect electric energy by impacting the surface through liquid drops. Compared with the prior art, the direct-current droplet generator can be constructed on any solid surface, the collected liquid mechanical energy is converted into the electric energy with the direct-current characteristic, and the direct-current droplet generator has the advantages of being simple in preparation process and low in cost. The open-circuit voltage of the direct-current liquid drop generator is up to kilovolt, a power management circuit is not needed, and the direct-current liquid drop generator can directly drive micro electronic devices to work or charge an energy storage unit. The structure of the direct-current generator has the functions of power generation, rectification and energy storage at the same time, a new technology based on solid-liquid interface water energy collection is developed, and the practical progress of water energy collection is greatly accelerated; meanwhile, the device is also a sensor or a probe. Due to the fact that the device achieves effective separation of charges, the device has extremely high application value in the aspects of droplet energy collection and self-driven sensing.

The invention relates to a macroporous structural lithium-sulfur secondary cell. The cell comprises a cathode taking sulfur as a cathode active substance, an anode and an electrolyte, the anode is a lithium sheet, and the cell is characterized in that the cathode is a sulfur / carbon / silicon dioxide composite material which employs a three-dimensional ultrathin structural C / SiO2 composite conductor with large aperture as a matrix, enables sulfur to be attached to the surface of the three-dimensional channel of the matrix in the form of an elementary substance, and employs a layer of a polyester membrane to coat the exterior. The preparation process successively comprises preparing a three-dimensional skeleton structure, preparing a SiO2 macroporous material, preparing a macroporous carbon / silicon dioxide composite conductor, introducing sulfur, and finally covering with a layer of the polyester membrane as an outer protective layer, and using a common technology to assembly the lithium ion battery. The prepared macroporous structural lithium-sulfur secondary cell is different with a conventional lithium ion battery in the structure, does not need an adhesive, the internal resistance is reduced because of the sufficient contact between a conductive material and an electroactive material, the internal structure of the cell is stable, the charge / discharge performances are superior, and the dimension of the cell can be amplified for satisfying large-power need.

The invention relates to a method for preparing mesoporous nano ferroferric oxide particles from titanium dioxide byproduct ferrous sulfate, and belongs to the technical field of inorganic functionalmaterial and electrochemical energy. The method is capable of solving a problem that synthesis cost of electrode mesoporous nano ferroferric oxide particles is high. The method comprises following steps: firstly, respectively dissolving a ferric salt and an alkaline carbon-containing compound in deionized water, uniformly mixing two obtained solutions, pouring an obtained mixed solution into a beaker, blowing oxygen into the beaker, and sealing; and at last, carrying out low-temperature heating reaction. The key points are that in the ferroferric oxide nucleation-crystallization process, CO2generated by a carbon-containing compound is used as a template to form ferroferric oxide nanoparticles with large specific surface area and adjustable size. According to the method, the cheap titanium dioxide byproduct ferrous sulfate is utilized, the use of various expensive additives is avoided, the method is suitable for large-scale production, and when the obtained Fe3O4 nanoparticle materialwith the large specific surface area is used for iron-nickel batteries and super capacitors, the capacity is remarkably improved, and the method has great economic benefits.

The invention discloses a method for preparing a hollow cement product based on a superabsorbent resin, which comprises the following steps: S1, taking a certain amount of superabsorbent polymer resinin a certain form to fully absorb water and expand into a corresponding solid hydrogel; S2, taking a certain amount of superabsorbent polymer resin in a certain form to fully absorb water and expandinto a corresponding solid hydrogel; S2, according to the mass ratio of the obtained solid hydrogel to cement is 1: 0.2-10, adding proper amount of water to adjust the consistency of the cement to obtain hydrogel cement; S3, adding the obtained hydrogel cement into any mould, solidifying, dismantling the mould, and leaving a large number of pores inside the cement after the hydrogel inside the cement is completely dehydrated, thereby obtaining a hollow cement product. As that proces of the invention does not nee professional production equipment, the cost is low; the density, size and shape ofthe pores in cement can be controlled, and the voids are evenly distributed.

A disclosed apparatus or method can include or use a non-transluminally implantantable blood pump housing, which can be sized and shaped to be implanted at an aortic valve of a human subject, the pumphousing can include: a pump housing cross-sectional profile size that is larger than is passable via a blood vessel of the human subject; and a power connection, configured for being electrically connected to an intravascular lead that is sized and shaped to extend from the pump housing through a subclavian artery of the human subject.

The invention relates to a super absorbent resin / kaolin composite sphere moisture absorption material with a shell-core structure and a preparation method thereof. The composite sphere moisture absorption material comprises porous spheres and the porous sphere comprises a super absorbent resin matrix serving as a core part and a shell layer wrapping the core part, the shell layer is a composite porous transmission layer formed by compounding kaolin and super absorbent resin, and the content of kaolin in the composite sphere moisture absorption material is 25-40 wt%. Furthermore, the preparation method uses the super absorbent resin as a matrix, a kaolin-macromolecule composite porous transmission shell layer is constructed on the surface of the super absorbent resin through the steps of activation, swelling, coating, drying, screening and the like, the composite porous transmission shell layer absorbs water vapor in a gas phase to form liquid water and then transmits the liquid water to core macromolecule resin, the moisture absorption mechanism of original super absorbent resin is changed, and the moisture absorption performance of the super absorbent resin is improved. Accordingto the prepared composite particle ball, the maximum moisture absorption capacity and moisture absorption rate within 10 hours reach 1.95 times of those of original resin, the moisture absorption rateis increased by 30% compared with that of the original resin, and the size of the composite particle ball can be regulated and controlled.

The invention relates to a preparation method of a high-strength porous ceramic ocular prosthesis seat, in particular to a preparation method of a porous ceramic spherical ocular prosthesis seat, which comprises the following steps: stirring and mixing biological ceramic powder, a binder, a pore forming agent and water to obtain high-viscosity slurry; pouring the obtained high-viscosity slurry into a spherical mold for molding, and drying to obtain a biscuit; and sintering the obtained biscuit at 1000-1300 DEG C for 1-2 hours, and crystallizing and forming the ceramic powder to obtain the porous ceramic spherical ocular prosthesis seat with a three-dimensional communicated pore structure.

The invention relates to a small block model pressing equipment for simulating a rock mass structure, and belongs to the technical field of a geomechnical model test. the equipment comprises a frame base, and a small block mold, an upper mold ejection block, a push-pull cover board, a pressure lever and a range draw bar which are fixed on the frame base; the small block mold and the push-pull cover board are arranged at the upper surface of the frame base; the upper mold ejection block is arranged at the lower part of the small block mold; the upper end surface of the upper mold ejection block is inserted into a cavity of the small block mold for simulating a rock mass; and the range draw bar is arranged at one end of the pressure lever. By adopting the small block model pressing equipment, the fabrication speed of a small block model can be greatly fastened; the quality of the small block model is improved; manpower and material resources are saved; meanwhile, the size, the shape and the height of a small block can be adjusted according to the requirements; and the smooth execution of the geomechnical model test is guaranteed.

The invention relates to a novel foam generator capable of preparing stable and size-controllable foam. The novel foam generator comprises a mixing device, a foam screening and stabilizing device anda liquid collector; the inlet of the mixing device is configured to be connected with an air compressor and a foaming agent diluent storage tank through pipelines; the inlet of the foam screening andstabilizing device is connected with the outlet of the mixing device through a pipeline; a sieve plate and / or a silk screen are / is arranged in a pipeline between the inlet of the foam screening and stabilizing device and the outlet of the mixing device; a foam output pipe is arranged at the top of the foam screening and stabilizing device; a partition plate and / or a sieve plate are / is arranged inthe foam output pipe; and a liquid outlet is formed in the bottom of the foam screening and stabilizing device; and the liquid collector is connected with a liquid outlet in the bottom of the foam screening and stabilizing device through a pipeline. The foam generator is high in adaptability to foaming agents; foam prepared from foaming agents with the same performance is more stable, and the sizeof the foam can be adjusted and controlled; the preparation of gypsum boards with high strength and low piece weight is facilitated, and the production cost of the gypsum boards is reduced.

The invention provides a fire hose laying system and a fire hose laying method. The fire hose laying system comprises a laying bag and a go-bag, wherein a fire hose I is arranged in the laying bag in a tied up manner, a fire hose II is arranged in the go-bag in a tied up manner, the fire hose I is folded in an S shape, and the fire hose II is folded annularly. The fire hose laying system and the fire hose laying method have the benefits as follows: multiple laying bags and multiple go-bags can be combined mutually, the fire hoses are laid and spread more scientifically and more rapidly, and the system and the method can meet requirements of different fire scenes by means of parts such as a shunt valve and the like for connection.