118results about How to "Large controllable range" patented technology

The invention discloses a preparation method of an ellipsoidal particle size-controllable alpha-Fe2O3 nano particle. By adopting the raw material combination of trivalent iron salts and hydroxyl or/and carbonyl surfactant, the hydroxyl or the carbonyl and -OH of Fe(OH)3 for hydrogen bonds to be absorbed on the surfaces of crystals; the irregular motion of the surfactant molecules containing the hydroxyl or the carbonyl is intensified so as to form an ellipsoidal alpha-Fe2O3 seed crystal through induction; an obtained product is uniform in particle size; in the preparation process, the overall participation of the surfactant effectively suppresses hard agglomeration, the controllable range of the particle size is wide, raw materials are easily available and the cost is low, and the preparation process is simple and convenient; the particle size distribution of the prepared ellipsoidal alpha-Fe2O3 nano particle is 90-800nm +/-10 nanometers, the particle size can be regulated and controlled within the range of 90-800nm, the capacity is increased, and industrialization is realized.

The invention discloses a method for preparing high-concentration nano silver monomer dispersion liquid. A nano silver stabilizer, a silver source and a silver ion complexing agent are dissolved in water in sequence, and a reducing agent is added after stirring is carried out for a certain period of time; and stirring continues, the mixture stands and ages, and the target high-concentration nano silver monomer dispersion liquid is obtained. According to the method, the high-concentration nano silver monomer dispersion liquid is obtained at low temperature through the very moderate polyol weak reducing agent rather than a strong reduction reaction. The size of nano silver particles prepared through the scheme ranges from 5 nanometers to 10 nanometers, the nano silver particles have monodispersity, and the agglomeration phenomenon is avoided. The antibacterial liquid has the characteristics of being high in stability, high in antibacterial rate, wide in antibacterial range and the like. The preparation method is easy and convenient to operate, the parameter adjustment range is wide, energy consumption is low, the period is short and the method is suitable for scale-up and industrial big production.

The invention discloses a micro-fluidic chip for generating spherical microbubbles.The micro-fluidic chip is formed by bonding two chip bodies which are different in internal microchannel structure, and microchannels with certain thickness and width are etched in the bonding surface of each chip body through a photoetching technology.The first chip body is internally provided with two liquid microchannels, a gas microchannel, a microbubble generation channel and a microbubble output channel, and an included angle with a certain angle exists on the junction of each liquid microchannel and the gas microchannel; the second chip body is internally provided with liquid microchannels, a gas microchannel and a microbubble output channel which all have the same structural sizes as those of the first chip body, but the microbubble generation channel does not exist in the second chip body.After the two chip bodies are bonded to form the micro-fluidic chip, liquid and gas are injected into the microchannels simultaneously, and the microbubbles with different diameter sizes are generated by adjusting the liquid flow and controlling the gas pressure.According to the micro-fluidic chip for generating the spherical microbubbles, the limitation of the microbubbles generated by a micro-fluidic element on the aspects of structure and shape is broken through.

The invention belongs to a resin based composite material liquid forming technique, and relates to a composite material liquid pressure forming method. The periphery of a predetermined mold body is filled with resin, and the predetermined mold body is continuously pressurized and cured successively by resin via a first pressure source and a second pressure source. According to the invention, the predetermined mold body is pressurized and cured continuously by resin; a molded composite material product not only has high fiber volume content equivalent to a composite material molded by a prepreg/autoclave technique, but also has the high precision equal to the composite material molded by an RTM technique; the applicable range of the composite material molded by a liquid forming technique is expanded; the molding efficiency is improved obviously; the manufacturing cost is reduced.

The invention provides a method for improving metallurgical property of vanadium-titanium blast furnace slag, which comprises the following steps of: adding furnace materials containing vanadium, titanium, ferrum and ore in a blast furnace; regulating furnace temperature; and smelting, and then separating slag and ferrum, and adding fluorescence stones into the furnace material so that the weight percentage of CaF2 in the blast furnace slag is controlled within 0.5-5 percent. According to the method provided by the invention, the performance of a vanadium-titanium-containing iron ore concentrate blast furnace for smelting vanadium-containing cast iron furnace slag is improved, and meanwhile, the smelting furnace temperature fluctuation range of the vanadium-titanium-containing iron ore concentrate blast furnace is widened by using fluorescence stones so that the controlled range of the high furnace temperature is widened.

The present invention discloses a brake-by-wire actuator based on motor-magnetorheological fluid clutch. The system includes a motor, a transmission mechanism and a floating-caliper disc mechanism. The transmission mechanism includes a magnetorheological fluid clutch, a planetary gear set and a ball screw set. The ball screw set includes balls, a ball screw and a sleeve. The floating-caliper disc mechanism includes a brake pad back plate, left and right brake pads, a caliper body, a brake disc and a guide rail. The motor and the magnetorheological fluid clutch cascaded in series, the linear motion of the sleeve of the ball screw set is achieved by the magnetorheological fluid clutch and the transmission mechanism. The sleeve pushes forward the brake pad back plate of the floating-caliper disc mechanism to clamp the brake disc by left and right brake pads, which accomplishes braking. The present invention uses a brake-by-wire actuator based on motor-magnetorheological fluid clutch, which not only has the advantages of fast response and improved braking security, but also solves the problem of the motor stalling during long time braking.

The invention discloses a pipeline vibration active control system with a band gap characteristic, and belongs to the technical field of vibration control in the field of machinery. The system adoptsthe band gap characteristic of a periodic structure and an intelligent damping material to control pipeline vibration. The system comprises a pipeline, a piezoelectric sensor, a signal conversion unit, an upper computer, an active controller, a voltage amplifier, a viscoelastic damping layer and piezoelectric ceramic, wherein the viscoelastic damping layer is periodically attached to the outer wall of the controlled pipeline. The piezoelectric sensor receives a vibration signal of the pipeline, the vibration signal is input to the active controller and the upper computer through the signal conversion unit to be calculated to obtain a feedback signal, the feedback signal is transmitted to the piezoelectric ceramic piece attached to the outer wall of the controlled pipeline through the voltage amplifier, and the piezoelectric ceramic piece deforms to enable the viscoelastic damping material to generate shear deformation. Due to the band gap characteristic of the periodic structure, the propagation of vibration of a specific frequency is attenuated in the structure. The two effects are combined to reduce the vibration amplitude of the pipeline.

The invention discloses a smart home management method which achieves remote control over home electric appliances, finishes the operations of automatic cooking, soup making and the like, effectively satisfies the efficient pace of life, brings great convenience to the daily life of people, freely achieves switchover type automatic connection based on various home electric appliances, freely adjusts a homes appliance needing controlling, achieves operation by combining a mobile phone or a PC or a tablet computer, and is convenient to use, practical and complete in function. The invention further provides a smart home management system which is high in intelligence degree, reasonable in control, easy to regulate and control, complete in function, capable of completing hardware operation of home management, large in controllable range, capable of meeting all home management requirements, and powerful in network compatible mode function, achieves regulation and control based on the internet or a mobile network, provides a data caching function, can freely modify or convert instructions, is safe to use and is convenient to operate.

The invention discloses a yielding anchor cable. The yielding anchor cable comprises a cable body and a yielding mechanism; the yielding mechanism comprises an inner cylinder body, an outer cylinder body, a cylinder cover, a piston ring and piston rods, wherein the inner cylinder body is a hollow cylinder, the cylinder cover is provided with a center hole and rod holes matched with the piston rods, and the cable body penetrates through a hollow part of the inner cylinder body a center hole of the cylinder cover and is linked with the piston rods; a working chamber, of which the section is of an annular shape, is formed by the inner cylinder body, the outer cylinder body and the cylinder cover, the piston ring is arranged in the working chamber, the top of the piston ring is connected with the at least two piston rods, a compression medium is arranged between the bottom part of the piston ring and the bottom part of the working chamber, and the piston rod penetrates through the rod holes and is driven to move by the cable body; a pressure releasing pathway is arranged at the bottom of the inner cylinder body, and is internally provided with a safety valve which is automatically started and closed according to a preset pressure valve. The yielding anchor cable provided by the invention is higher in permitted deformation, high in bearing capacity and constant in resistance, and the large deformation demand of surrounding rocks can be met.

The invention provides a seven-axis five-power robot applying a parallelogram principle, which has the advantages that the stability in taking a workpiece is improved, the control range of a gripper is enlarged and time and labor are saved in fine adjustment of the gripper. The robot comprises a base, wherein a horizontal rotatable first shaft is arranged on the base; a first shaft servomotor for driving the first shaft to rotate is arranged at one end of the first shaft; the other end of the first shaft is connected with a swinging arm component; the first shaft servomotor drives the first shaft to rotate so as to drive the swinging arm component to circumferentially swing around the first shaft; the free end of the swinging arm component is connected with the gripper for gripping the workpiece; and the swinging arm component comprises a first swinging arm component and a second swinging arm component which are mutually hinged together end to end and form two parallelogram hinging structures. The robot is characterized in that the gripper comprises a transverse driving member, a vertical driving member and end grippers.

The invention discloses a mixed flow magnetorheological valve which comprises a left end cover, a valve spool, a valve body, a guide disk, a magnetic disk, a positioning disk, a gasket, a coil, a sealing ring, a screw and a right end cover. A flow passage between the magnetic disk and the valve body forms an axial damping gap, and flow passages among the magnetic disk, the valve body and the valve spool form radial damping gaps. When current is inputted into the coil, magnetic lines vertically penetrate the axial and radial damping gaps, and the magnetic induction intensity is generated under the action of a magnetic field. The pressure difference in the axial and radial damping gaps can be controlled by adjusting the strength of the current. By the aid of the structure, the magnetorheological valve has enough pressure difference, clogging of the valve is avoided, the performance of the valve is more stable, the adjustable range of the pressure difference is wider, and the magnetorheological valve is accurate in damping gap positioning, compact in structure, small in size, convenient to assemble, particularly suitable for serving as a damper bypass valve and applied to damping systems of industries such as a railway and a traffic.

The invention provides a method for preparing an integral type seamless metal fiber perforated pipe. The method comprises the following steps of: 1, machining and leveling an unsintered rough metal fiber felt; 2, performing oxidation treatment on three-segment separable type tubular die; 3, tangling the rough metal fiber felt to an internal support body of the three-segment separable type tubular die by a rolling shaping method, and loading into a three-segment separable type external die; and 4, sintering at high temperature, cooling along with a furnace and demolding so as to obtain the integral type seamless metal fiber perforated pipe. For implementing the method, the invention also discloses a tangling device of the integral type seamless metal fiber perforated pipe. By using the method and the device, the metal fiber perforated pipe can be integrally shaped, pipe reeling and welding processes in the prior art are saved, the problem of influence of a joint on the material integral performance during re-shaping can be solved, and a controllable range of the thickness and porosity of a material is increased.

The invention relates to a sewing machine chuck which comprises a chuck body, three sliders, three clamping claws, a positioning claw and a contracting and releasing disc. Three sliding grooves are radially distributed on the chuck body, the sliders are arranged in and can slide along the sliding grooves, the clamping claws are arranged on the sliders, the positioning claw is arranged on the chuck body, the contracting and releasing disc is arranged in the chuck body and can pull the sliders to synchronously slide in a manner of being contracted towards or being away from the center of the chuck body, a guide groove is further arranged on the chuck body radially, the positioning claw is arranged in and can move along the guide groove, a fixing member capable of fixing the positioning claw at a certain position in the guide groove is arranged on a base portion of the positioning groove, adjacent intervals between two of the sliding grooves and the guide groove are smaller than 120 degrees, the other sliding groove divides the two sliding grooves equally, and an angle formed between the moving direction of the positioning claw and the sliding direction of the slider adjacent to the positioning claw is not larger than 60 degrees. The sewing machine chuck has the advantages of convenience and accuracy in adjusting and positioning, large in controllable range, wide in application range and the like.

The invention discloses a heat-reduction metallization copper plating process for a carbon fiber surface, which belongs to the technical field of modification methods for the carbon fiber surface. The process comprises the following steps: pretreatment of a carbon fiber; preparation of a pre-plating liquid; dipping; heat-reduction copper plating; etc.; wherein the process is carried out in a micro-aerobic carbon environment, N2 is used as protection and dilution gas, reduction temperature is 650 to 700 DEG C, reduction time is 40 to 50 min, and the pH value of the pre-plating liquid is 11 to 12. Compared with chemical copper plating and electrical copper plating of the carbon fiber, the copper plating process provided by the invention has the following advantages: since a micro-aerobic carbon atmosphere is employed for reduction of a copper salt, the two major steps of sensitization and activation before copper plating are omitted, usage of precious metals like AgNO3 and PdCl2 is reduced, experiment cost is reduced, and a pretreatment step is simplified. According to XRD and EDS analysis, a great amount of copper is attached onto the carbon fiber surface after copper plating, reaching a certain coverage ratio; and according to SEM observation results, the copper on the carbon fiber surface is distributed on the carbon fiber surface in a superposed island shape.

The invention provides an anti-oxidation silver-plated nylon fiber with a protective film. An adhesive layer adopted in the fiber can not only stabilize and protect the silver element in the silver-plated nylon fiber on the inner side but also prevent external human sweat and air erosion; the nylon fiber is pretreated with a sodium hydroxide solution, so that the precipitation of silver metal on the surface of the nylon fiber in the later stage is facilitated; when the nylon fiber is soaked in a silver ammonia solution, the silver metal can be uniformly precipitated and adsorbed on the surfaceof the nylon fiber by using an ultrasonic device for oscillation. The adhesive layer not only utilizes the viscosity of silica gel, can be used as a good connecting agent between an inner layer and an outer layer, ensures the stability between the inner and outer layers, but also can prevent the silver-plated nylon fiber from being oxidized and consumed in a subsequent reaction. Pigment materialscontaining different compositions are added into the adhesive layer so that the outer surface of the fiber can have different colors, there is no need to conduct dip dyeing on the exterior of the fiber again, and oxidative corrosion caused by external chemicals to a silver material is avoided.

The invention provides a seven-shaft robot with a transverse moving mechanism, which improves the stability in workpiece taking, enlarges the operation range of a gripper and saves effort and labor in fine adjustment of the gripper. The seven-shaft robot comprises a base, wherein a horizontally rotatable first shaft is arranged on the base; a first shaft servo motor for driving the first shaft to rotate is arranged at one end of the first shaft; the other end of the first shaft is connected with a swinging arm component; the first shaft servo motor drives the first shaft to rotate to drive the swinging arm component to circumferentially swing around the first shaft; a free end of the swinging arm component is connected with the gripper for gripping a workpiece; the swinging arm component comprises a first swinging arm component and a second swinging arm component, which are mutually hinged together; the two swinging arm components are mutually hinged end to end; each of the two swinging arm components forms two parallelogrammic hinged structures; and the gripper comprises a transverse driving part, a vertical driving part and an end gripper.

The invention provides a liquid level control method of a continuous casting machine. The liquid level control method of the continuous casting machine comprises the steps that first, whether compensation needs to be conducted or not is judged according to the liquid level accumulated change amount of a crystallizer in the first time; when compensation is determined to be conducted, whether the liquid level fluctuation main frequency of the crystallizer is larger than a preset frequency threshold value or not is judged, and accordingly a compensation controller is determined; then, the compensation controller is used for compensating the first liquid level practical value of the crystallizer in the first time, and a first compensated liquid level practical value can be acquired; then, the liquid level of the crystallizer is controlled by the liquid level controller according to the first compensated liquid level practical value; the liquid level fluctuation amplitude of the crystallizer is calculated, and the compensation strength of the compensation controller is adjusted according to the liquid level fluctuation amplitude; at last, a second liquid level practical value is acquired in the second time, and the second liquid level practical value is compensated.

The invention discloses a pressure maintaining device in a rock creep impact and micro-fracture scanning experiment and an experiment method, and relates to the field of rock mechanics experiments. The pressure maintaining device comprises a pressure bearing mechanism, constant-pressure locking mechanisms and a pressure real-time monitoring and adjusting mechanism, wherein the pressure bearing mechanism comprises a cylindrical panel, an upper panel and a lower panel; four groups of constant-pressure locking mechanisms are arranged; the constant-pressure locking mechanisms are arranged at fourcorners of the upper panel and four corners of the lower panel respectively; each constant-pressure locking mechanism comprises a cylindrical pressing rod and a hydraulic locking device; and the pressure real-time monitoring and adjusting mechanism is composed of a pressure sensor, an intelligent pressure control pivot and a hydraulic pressure supplementing device, and real-time pressure detectionand adjustment in the pressure maintaining process can be achieved. By adopting the pressure maintaining device, static load pressure of a rock test piece can be immediately locked and stabilized inthe conventional mechanical experiment process of the rock test piece, the real-time test of other physical and mechanical properties of a coal and rock mass test piece in the mechanical loading testprocess is realized, and the rock mechanical property research under multi-field coupling can be realized.

The invention relates to the technical field of electrical machinery manufacture, specifically to a device for live replacement of a cross arm and an insulator string and an application method. The device is characterized in that the device is provided with an insulating cross rod, left and right sides of the insulating cross rod are symmetrically provided with wire supporting units which support wires on two sides of the cross arm, front and rear sides of a middle part of the insulating cross rod are respectively provided with an enclasping unit used for enclasping a telegraph pole and a wire supporting unit used for lifting a wire at the top of the telegraph pole, the three units are integrated, a cross arm can be replaced, an insulator string on the cross arm can also be replaced, and an insulator string on the top of the telegraph pole can also be replaced. The device for live replacement of the cross arm and the insulator string has the advantages of being reasonable in structure, being convenient to replace, saving manpower, being high in work efficiency, etc.

The invention discloses a ceramsite water permeable brick with an interception effect on contaminants, and a preparation method of the ceramsite water permeable brick. The ceramsite water permeable brick is good in water permeability and air permeability, high in bending strength and compressive strength, and large in water permeation coefficient; and through the brick, rain water can rapidly permeate into the ground to supplement soil water and underground water, maintain soil humidity and improve the existence condition of plants and soil microorganisms on the urban ground, and accordingly,urban drainage and flood control pressure can be relieved, and the brick has good effects on preventing pollution of public waters and treating sewage. In addition, according to the ceramsite water permeable brick, base layer ceramsite and surface layer ceramsite are prepared from building waste, so that the waste is turned into wealth, resources are saved, the contaminants such as COD, Pb<2+>, Zn<2+>, Cu<2+>, Cd<2+> and Cr<2+> in a water body can be subjected to adsorption and purification treatment, and thus, both purification of the water body and environmental protection are achieved.