721results about How to "Small diameter" patented technology

The invention discloses a humic acid liquid fertilizer and a preparation method and application thereof, and belongs to the technical field of liquid fertilizers, organic waste and ferric oxide are ball-milled and mixed, transferred into a muffle furnace, roasted for 2-2.5 h at 280-310 DEG C under nitrogen protection, transferred into a reaction kettle and stirred and mixed with a 10 wt% hydrogen peroxide aqueous solution and potassium hydroxide powder, and the humic acid liquid fertilizer is obtained. The preparation method comprises the following steps: adding potassium humate into a potassium humate solution, extracting for 40-60 minutes under the assistance of ultrasonic waves, filtering to obtain a potassium humate extract and filter residues, transferring the potassium humate extract into a stirring kettle, adding urea, dipotassium phosphate, a composite carbon dot lubricant and a suspension stabilizer into the stirring kettle, and uniformly mixing to obtain the humic acid liquid fertilizer. The suspension stabilizer can reduce the generation of flocculation and crystallization in the liquid fertilizer, and through the antifriction and lubrication effects of the composite carbon dot lubricant, the friction force between indissolvable solids and water outlet holes of the drip irrigation equipment is reduced, and the risk of blockage of the drip irrigation equipment is reduced.

The invention relates to the technical field of winding devices, and particularly discloses a film blowing machine material receiving device for express bag production and a process thereof, the film blowing machine material receiving device for express bag production comprises a supporting frame, two winding rollers arranged at the two ends of the supporting frame, a cutting knife and an open-loop track coaxially arranged with the winding rollers, and protrusions are arranged at the head end and the tail end of the open-loop track; a rolling shaft capable of rotating and walking along the open-loop track is arranged on the open-loop track, when the rolling shaft moves from one end of the open-loop track to the other end of the open-loop track, a cut film is attached to the rolling shaft to be wound, the rolling shaft presses the film on the winding roller when entering the open-loop track from the protrusion, and when the rolling shaft enters the protrusion from the open-loop track, the film is wound on the winding roller. The rolling shaft is separated from the film; when a thin film is cut off, the cut-off end of the thin film can be pressed and wound on the winding drum, and when the position of the winding drum completing winding and the position of the winding drum to be wound are exchanged, the diameter of the winding roller completing winding is reduced so that a thin film roll can be conveniently detached.

The invention discloses an ionic liquid modified polyimide nanofiber film and an air purification filter screen based on the ionic liquid modified polyimide nanofiber film, and belongs to the technical field of film filtering materials. The preparation method comprises the following steps: firstly, selecting a diamine monomer and a dianhydride monomer to carry out low-temperature polycondensation reaction, and then carrying out solvent replacement and freeze drying to obtain polyamide acid powder; dissolving the powder to obtain a polyamide acid spinning solution, preparing an ionic liquid / polyamide acid spinning solution on the basis, and carrying out electrostatic spinning to obtain an ionic liquid / polyamide acid nanofiber membrane; and finally, carrying out high-temperature thermal imidization treatment to prepare the ionic liquid / polyimide nanofiber membrane. The method is simple and efficient, the problems of low resistance, high pressure drop and the like of a traditional nanofiber film in air filtration are solved, development and application of the nanofiber film in the field of air filtration are further widened, and the nanofiber film has important scientific significance and application value in the fields of high-temperature filtration, gas adsorption and the like.

The invention provides a common-mandrel double-self-driving synchronous control permanent magnet outer rotor lifting device and a control method thereof.The device comprises a mandrel and supporting bases used for supporting the left end and the right end of the mandrel, and the mandrel is provided with a left permanent magnet outer rotor lifting structure and a right permanent magnet outer rotor lifting structure; each permanent magnet outer rotor lifting structure comprises a winding drum, a stator, a permanent magnet, an end cover and a disc brake used for braking the winding drum, the stator is arranged in the winding drum, the winding drum is rotatably connected with the mandrel, the stator comprises a stator iron core support, a stator iron core and a stator winding, the stator iron core support is arranged on the mandrel and provided with the stator iron core, and the stator winding is arranged on the stator iron core support. The stator core adopts a magnetic slot wedge, the stator winding is arranged on the stator core, and the mandrel is provided with a wiring slot for accommodating a stator winding outgoing line; the whole diameter can be reduced, the stability during working is improved, the double-load two-way transportation requirement can be met, the flexibility and adjustability are improved, and the double-load two-way transportation device has the advantages of being few in transmission links, free of a high-speed shaft, high in reliability and low in energy consumption.

The invention relates to the technical field of robots, and discloses an actuator, a joint module, a biped robot, a quadruped robot, a four-wheeled robot, a mechanical arm and a robot. The actuator mainly comprises a first-stage planet carrier, a first bearing, a gear ring and a supporting frame, the first-stage planet carrier enables the first bearing to be installed between a first supporting part and a second supporting part of the supporting frame so as to provide support for the first-stage planet carrier, the requirement for the size of the first bearing is reduced through the supporting mode, the outer diameter of the planet carrier does not need to be matched, and the supporting effect is good. The structure is more compact, and the weight and cost of the actuator can be reduced by reducing the size of the first bearing.

The invention relates to wire and cable production and manufacturing automatic processing equipment and processing technology, and relates to the technical field of wires and cables.The wire and cable production and manufacturing automatic processing equipment comprises a fixing frame, a processing mechanism used for winding, pulling and twisting wires and a processing mechanism used for paying off and guiding single wires, and the processing mechanism comprises a paying off assembly and a guiding assembly; the processing mechanism comprises a winding assembly, a traction assembly and a twisting assembly; the winding assembly comprises a winding drum rotationally arranged on the fixing frame, a guide block movably arranged on the fixing frame, a rotating part used for driving the winding drum to rotate, a translation part used for driving the guide block to translate and a dismounting part used for dismounting the winding drum. When the multiple pay-off reels pay off wires at the same time, it can be guaranteed that the tightness of each single wire is kept consistent, the pay-off speeds of the pay-off reels are prevented from being different, and the phenomena of non-uniform pay-off, non-uniform stranded wire pitch and irregular stranded wire appearance caused by the fact that the lengths of the paid-off single wires are not consistent are prevented.

The invention relates to the field of coal dressing flotation reagents, and discloses a green coal dressing flotation reagent and a preparation method and application thereof. The invention provides a green coal dressing flotation reagent which is composed of 70-80 parts of methyl oleate, 15-30 parts of methyl palmitate and 3-6 parts of an emulsifying agent (sorbitan oleate Span80). The preparation method comprises the following steps: firstly, weighing raw materials, magnetically stirring methyl oleate and methyl palmitate for 30 minutes, then mixing with sorbitan oleate (Span80), and heating and stirring in a water bath at 55 DEG C for 2 hours to obtain the medicament. In the application of coal slime flotation, the reagent solution is added into ore pulp and matched with a foaming agent, and flotation clean coal is formed by utilizing bubbles to carry coal slime particles. A plurality of groups of experiments show that the agent is excellent in performance, the clean coal recovery rate can reach 79.66%, the ash content is as low as 10.91%, the agent dosage is remarkably reduced compared with a traditional collecting agent, meanwhile, raw materials are green and environmentally friendly, the coal dressing industry is effectively promoted to develop towards the efficient and green direction, and the agent has extremely high application value.

The utility model provides a steering system of a vehicle. The steering system comprises a steering control device, a steering driving device and a steering execution device. The steering driving device comprises a power output module, a power driving module, a first driving circuit and a second driving circuit, the power output module is connected to the steering execution device and used for driving the steering execution device, the first driving circuit is used for being connected with a first power source of the vehicle, and the second driving circuit is used for being connected with a second power source of the vehicle. The power driving module is used for controlling the first driving circuit or the second driving circuit to be connected to the power output module; the first driving circuit comprises two first driving bridge circuits which are connected in parallel and / or the second driving circuit comprises two second driving bridge circuits which are connected in parallel; the steering control device is connected to the power output module and used for controlling the power output module to operate. According to the steering system of the vehicle, the driving safety of the vehicle can be effectively improved.

The invention discloses a manufacturing method of an impact type rotating wheel of a tailor-welded hub and square-head special-shaped water bucket composite welding structure. Compared with main manufacturing technologies such as integral forging numerical control machining manufacturing, traditional bucket and hub forge welding manufacturing and electric arc additive manufacturing of the impulse turbine runner in the current industry, the material utilization rate and the welding efficiency are improved, the difficulty of forging and automatic welding is reduced, the comprehensive performance of a high-stress area structure of the runner is improved, and the manufacturing cost is reduced. The method has outstanding advantages in the aspects of manufacturing cost and efficiency.

The invention relates to the technical field of environmental geological engineering, in particular to test equipment and method for simulating stratum deformation caused by confined water exploitation and recharge, and the test equipment comprises a model box frame, a cross elevator, a water suction pump, a sedimentation tank and a model box, and is characterized in that the inner wall of the model box frame is fixedly connected with organic tempered glass; a counter-force beam is fixedly connected to the top of the model box frame, three mechanical jacks are fixedly installed on the top of the inner side of the counter-force beam, a plurality of internal water injection pipes which are distributed at equal intervals are laid on the inner side of the model box frame, and a steel wire hose is connected between every two adjacent internal water injection pipes in a threaded mode. Through cooperation of the structures, the large-scale physical model test device which is rich in function, reasonable in design, practical and feasible is formed, and the process of ground subsidence and springback caused by dynamic changes of multi-layer pressure-bearing water levels can be simulated.

The invention discloses an electric pile type air mobile charging robot power dispatching system and method.The system comprises a charging robot, an electric pile, a distribution dispatching control unit, a direct-current bus and an electricity taking module, the direct-current bus is arranged along a suspension track, and the charging robot takes electricity from the direct-current bus through the electricity taking module; and the distribution scheduling control unit controls and distributes the power for each charging robot to take electricity from the direct-current bus according to a given power distribution rule. The invention relates to the field of new energy vehicle charging, an electric pile is used as an input source for centralized energy supply to a charging robot, and flexible scheduling distribution is performed on charging power through a centralized and unified scheduling strategy, so that the operation efficiency of a whole charging station and the utilization rate of charging resources can be greatly improved, and the charging experience of a user is improved. The application of the direct-current bus can also greatly reduce the diameter of a cable required by a power supply line deployed along the suspension track, and the cost is greatly reduced.

The invention discloses a fiber / powder composite VIP core material based on a DLP technology and a preparation method and application thereof, and belongs to the technical field of vacuum insulation panel manufacturing. The preparation method of the core material comprises the following steps: (1) uniformly stirring and mixing glass fibers, gas-phase SiO2 powder, light-cured resin, a dispersing agent and a photoinitiator to obtain a printing material; (2) printing a fiber / powder composite VIP core material by adopting the printing material in the step (1) according to a three-dimensional model of a preset structure, drying and cooling; and (3) putting the core material in the step (2) into a barrier film, adding a getter, and packaging to obtain the product. The method has the beneficial effects that solid-phase heat conduction can be effectively reduced through elaborately optimized material composition and structural design, particularly fiber directional layered arrangement which is beneficial to realization based on a DLP printer, and fiber pores can be further filled after gas-phase SiO2 is compounded. The heat conductivity of the VIP can be reduced to 0.0025-0.0035 W / (m.K) by combining the synergistic effect of all the components, and is remarkably improved compared with that of traditional VIP.

The invention relates to a bending-resistant single-mode optical fiber with a small outer diameter, which comprises a core layer and a cladding layer, and is characterized in that the relative refractive index difference n1 of the core layer is 0.3-0.45%, the radius R1 of the core layer is 5.5-7 microns, the cladding layer sequentially comprises a transition cladding layer, an inner cladding layer, a sunken cladding layer and an outer cladding layer from inside to outside, the relative refractive index of the transition cladding layer is gradually reduced from inside to outside, and the inner cladding layer is a concave cladding layer. The relative refractive index difference n3 of the inner cladding layer is-0.3% to-0.7%, the radius R3 of the inner cladding layer is 8-14 [mu] m, the relative refractive index difference n4 of the sunken cladding layer is-0.6% to-0.75%, the radius R4 of the sunken cladding layer is 28-35 [mu] m, the outer cladding layer is a pure silica glass layer, the radius R5 of the outer cladding layer is 60.1-62.5 [mu] m, a coating layer is coated outside the outer cladding layer, and the outer diameter of the coating layer is 150-175 [mu] m. By optimizing the section structure of the optical fiber and improving the performance of the coating layer, the bending performance and the mechanical performance of the optical fiber are effectively ensured on the premise of reducing the coating diameter, and the fracture rate per 100 kilometers is reduced.

The invention relates to a superfine-caliber bipolar plasma resectoscope, a combined suite and a using method of the combined suite. The invention discloses a superfine-caliber bipolar plasma resectoscope which comprises an inner sheath, an electronic flexible lens, a plasma cutter and an operator, a connector is arranged at one end of the inner sheath and used for being connected with an external water source to inject water into the inner sheath. The electronic flexible lens and the plasma cutter are arranged in the inner sheath in a penetrating mode. According to the ultra-thin-caliber bipolar plasma resectoscope combination suite, the whole design thought is changed, the brand-new prostate bipolar plasma resectoscope structure which can keep the original function of the resectoscope unchanged and reduce the caliber is provided, an outer sheath is innovatively removed, the fistulization assembly is designed in a matched mode, and the structure is simple, convenient and practical. Meanwhile, the inner sheath serves as the outermost layer of the whole novel resectoscope structure, the electronic soft lens is used for replacing a traditional hard eyepiece, the diameter of the resectoscope is further reduced, and finally the diameter of the resectoscope stretching into the urethra can reach Fr6-Fr18.

The invention relates to the technical field of ocean engineering and electric power engineering, and discloses an assembly type fan jacket and a construction method thereof.A first supporting node and a second supporting node are connected, connection between pipe bodies is achieved, and solidification media are poured into the first supporting node and / or the second supporting node, so that the pipe bodies are connected. After the curing medium is cured, the bearing capacity of each supporting node of the jacket is improved, premature yield and deformation of each supporting node can be delayed or even inhibited, the phenomenon of plastic deformation under the action of external force is avoided, and the supporting performance of each supporting node can be better exerted.

The invention relates to a low-carbon high-plasticity hot-rolled wire rod for a 1860MPa-grade stranded wire and a manufacturing method of the low-carbon high-plasticity hot-rolled wire rod. C-Si-Mn-Cr components are subjected to hot-rolled spinning to form a wire rod, and then the wire rod is subjected to online molten salt isothermal treatment, so that the wire rod is cooled at a cooling speed of greater than or equal to 34 DEG C / s and enters a sorbite phase region from an austenite state to form a structure taking sorbite as a main part, and isothermal tempering is carried out, so that the low-carbon high-plasticity hot-rolled wire rod is obtained. And finally, slow cooling is conducted through a roller way, the hot-rolled wire rod with the microstructure comprising not less than 89% of tempered sorbite and the balance of tempered ferrite and microspheroidized carbide is prepared, the carbon content can be reduced, the material cost can be further reduced, the export tax refund requirement can be met, the abnormal structure precipitation risk is effectively reduced, and the structure uniformity is improved. According to the method, the strength of the steel wire rod is matched with the high plasticity, the tensile strength is 1190-1240 MPa, the percentage reduction of area is 49%-54%, and the yield and the use performance of the 1860 MPa grade steel strand can be improved.

The invention discloses a spinning machine convenient to position, and belongs to the technical field of spinning forming, the spinning machine comprises a base table, a fixed seat is fixedly mounted on the left side of the base table, and a rotating shaft is rotatably mounted on the upper side of the fixed seat; a deformation mold is mounted at the right end of the rotating shaft; a movable supporting column is arranged on the right side of the base. A fastening assembly is installed at the left end of the movable supporting column. A spinning assembly is installed on the base and located on the rear side of the fixing base. A movable supporting assembly is arranged at the position, between the fixing base and the movable supporting column, of the base table, a synchronous driving assembly is installed on the movable supporting assembly, and a straightening assembly used for straightening the metal circular plate is installed on the synchronous driving assembly. A centering assembly for centering the metal circular plate is mounted on the movable supporting assembly and the synchronous driving assembly; and a pushing assembly is mounted on the fastening assembly. By means of the mode, in the process that the fastening assembly moves to press the metal circular plate, the metal circular plate is automatically positioned; automatic demolding and discharging are carried out through cooperation of the deformation mold and the fastening assembly.

The invention discloses a vehicle air suspension system and a vehicle, the vehicle comprises a power battery, and the system comprises at least one air suspension device; the air compressor is connected with at least one air suspension device; the vehicle-mounted charger is connected with the power battery and the air compressor and used for converting direct current provided by the power battery into alternating current to supply power to the air compressor in the first working mode, so that the air compressor outputs compressed air to drive at least one air suspension device. According to the suspension system, the power battery is adopted for high-voltage power supply, the vehicle-mounted charger is reused for supplying power to the air compressor to drive the multiple air suspension devices, driving current can be reduced, loss is reduced, heating is not prone to occurring, the diameter of a distribution wire harness can be reduced, one set of high-voltage control driver can be reduced, and cost is reduced. The cost and the size can be remarkably reduced, and the supporting and damping effects of the vehicle can be improved.

The utility model relates to the technical field of optoelectronics, in particular to a small photoelectric pod device based on the optical super-resolution technology, which comprises an azimuth base, a pitching frame and a photoelectric mechanism, the pitching frame is arranged on the surface of the bottom end of the azimuth base, and the photoelectric mechanism is arranged on the inner side of the middle of the surface of one side of the pitching frame. According to the device, the nacelle supports seamless switching between daytime work and night work through three kinds of photoelectric equipment, images can be collected remotely, interest point targets can be positioned, and visible light and infrared videos can be output in real time through full-high-definition videos; and unnecessary weight is reduced while strength is guaranteed, so that the pod is smaller in size and lighter in weight compared with products of the same type, light weight is achieved to the maximum extent under the condition that three kinds of optical equipment are carried, the discovery and recognition accuracy of a time-sensitive target can be improved, cost is reduced, and the pod is suitable for popularization and application. And a certain help is also provided for reducing the overall weight.

The invention belongs to the technical field of intelligent fiber preparation, and discloses a strain luminescent fiber continuous preparation method which comprises the following steps: preparing a sheath solution and a core solution which is a strain luminescent solution; inputting the sheath layer solution and the core layer solution into coaxial wet spinning equipment to prepare gel fibers cured by the sheath layer solution; and heating the gel fiber to cure the core layer solution to obtain the strain luminescent fiber. The strain luminescent fiber can be continuously processed, and the obtained strain luminescent fiber has the advantages of lower diameter, higher mechanical property, higher sensitivity and longer service life. In addition, the strain luminescent fiber can be woven into a luminescent fabric, and has a wide application prospect in the field of intelligent wearable electronic devices.

The invention belongs to the technical field of wastewater treatment and discloses a green low-carbon industrial wastewater treatment and purification device which comprises a device body, the upper end of the device body is connected with a liquid inlet pipe, the lower end of the left side of the device body is connected with a liquid outlet pipe, and the upper end of the right side of the device body is connected with an exhaust pipe. A power motor is installed in the middle of the device body, a first rotating shaft is connected to the lower shaft end of the power motor, a pre-filtering barrel is fixed to the upper end in the device body, a discharging pipe is connected to the bottom end of the pre-filtering barrel, and the lower end of the first rotating shaft extends into the pre-filtering barrel. According to the environment-friendly and low-carbon industrial wastewater treatment and purification device, by arranging the pre-filtering structure, large-particle-size impurities, sludge and the like can be filtered and intercepted, collection and treatment can be conveniently carried out, the follow-up treatment difficulty is reduced, a multi-angle stirring structure is matched, a medicament and wastewater can be efficiently mixed and dissolved, and the treatment effect is good. The treatment efficiency of the industrial wastewater is improved.

The invention relates to the technical field of SMP connectors, in particular to an SMP connector which comprises a connector shell main body, one end of the connector shell main body is connected with a coaxial cable inner conductor, a fixing mechanism convenient for connecting and fixing the coaxial cable inner conductor is arranged outside the coaxial cable inner conductor, a combined shell is arranged on one side of the connector shell main body in an inserted mode, and the combined shell is connected with the coaxial cable inner conductor. And a connecting mechanism convenient for improving the use frequency of the bent connector is arranged in the connector shell main body. According to the SMP connector, the right-angle groove and the fixing groove are formed in the connector shell body, the right-angle fixing sleeve and the second insulator are installed in the right-angle groove and the fixing groove respectively, and the bent center pin is connected into the second insulator and the right-angle fixing sleeve. And meanwhile, one end of the bent center pin is connected with the coaxial cable inner conductor through the welding female pin, and the exterior of the welding female pin is connected and fixed through the first insulator, the combined shell and the welding machine cup, so that high-frequency bent angle connection is realized.

The invention discloses a laser shock wave lithotripsy imaging device, and the device comprises a laser device which is used for generating laser beams with different parameters; the laser beam expanding and collimating system is used for expanding and collimating all laser beams generated by the laser; the laser coupling part is used for guiding the expanded and collimated laser beams into a guide pipe; the far end of the catheter is used for entering a blood vessel for treatment; wherein the catheter comprises a laser shock wave optical fiber and an OCT optical fiber. According to the scheme, laser energy can be generated through a high-energy source laser, the laser energy is transmitted in the catheter and output to generate shock waves, and the shock waves can break calcification at treatment sites including one or more vasculature in the vasculature. According to the scheme, in the treatment process of the laser shock wave optical fiber, the OCT optical fiber can watch the treatment effect in real time, so that laser shock wave parameters can be adjusted at any time, and the treatment effect is improved.

The utility model relates to the technical field of cables, in particular to a tensile cable, which comprises a cable core, an inner sheath layer is arranged on the outer side of the cable core, a supporting compression-resistant mechanism is arranged in the inner sheath layer, a reinforcing layer, a fire-resistant layer, an insulating layer and a tensile layer are sequentially arranged on the outer side of the inner sheath layer, a tensile woven mesh is arranged on the outer side of the tensile layer, and the tensile woven mesh is arranged on the outer side of the cable core. According to the utility model, when the cable is dragged, the tensile woven meshes interact with one another, the reinforced protective layer structure eliminates external tension, and meanwhile, the elastic supporting pieces are arranged in the filling protective layer, so that when the cable is extruded, the cable is prevented from being damaged, and the cable is prevented from being damaged. The arc-shaped supporting plates at the two ends of the elastic supporting piece play a good supporting and protecting role, when the cable needs to be dragged, a rope is directly wound on the pull ring, then the rotary knob is rotated to enable the screw rod to drive the arc-shaped fixing abutting piece to fix the cable outer protection layer and the rope, and the cable is convenient to drag and drag.

The invention belongs to the technical field of star-shaped sleeve feeding and discharging, and particularly relates to a star-shaped sleeve feeding and discharging device which comprises a base, sliding frames, a clamping and conveying integrated material conveying mechanism, an extension type grinding mechanism and a clamping type driving mechanism, the sliding frames are symmetrically arranged on the two sides of the base, the clamping and conveying integrated material conveying mechanism is arranged on the sliding frames, and the extension type grinding mechanism is arranged on the clamping type driving mechanism. The extending type grinding mechanism is arranged at the end, close to the base, of the clamping and conveying integrated material conveying mechanism, the clamping type driving mechanism is arranged on the base, and the clamping and conveying integrated material conveying mechanism comprises a lifting mechanism, a butt clamping mechanism and a material carrying mechanism. According to the star-shaped sleeve feeding and discharging device, a star-shaped sleeve feeding and discharging structure and a star-shaped sleeve grinding structure are integrally arranged, the grinding time of the star-shaped sleeve can be prolonged, it can be avoided that many chippings are gathered between the inner wall of the star-shaped sleeve and a grinding layer, and the grinding quality of the star-shaped sleeve is guaranteed.

A shell is provided with a bubbling cavity and a water inlet jet hole formed in the top of the bubbling cavity, a gas-liquid mixing part is arranged in the bubbling cavity, a gas inlet cavity communicated with the outside atmosphere is formed between the gas-liquid mixing part and the shell, the gas-liquid mixing part is further provided with a microbubble generating cavity, and the microbubble generating cavity is communicated with the water inlet jet hole. The gas-liquid mixing piece is communicated with the gas inlet cavity and the micro-bubble generating cavity through a gas-liquid mixing hole, the water inlet jet hole is communicated with the gas inlet cavity, water enters the micro-bubble generating cavity through the gas-liquid mixing hole, and a foaming net is arranged on a fluid path in the micro-bubble generating cavity. According to the faucet microbubble water outlet device, gas and water flow are mixed through the jet flow effect, then bubbles are rectified and refined through the bubbling net, the diameter of the bubbles is reduced, the content of the microbubbles is increased, and then the flushing and dirt removing effects are improved. The faucet microbubble water outlet device is simple in structure, convenient to assemble and high in practicability.

The invention discloses a preparation method of polylactic acid fibers for medical and sanitary materials, and relates to the technical field of polylactic acid fibers. Nano-crystalline cellulose, nano-graphite particles and polylactic acid are blended and crosslinked, the mechanical property of a matrix is enhanced, the antibacterial property is achieved, fibers are prepared through spinning, supercritical carbon dioxide treatment is conducted for the first time, the nano-graphite particles can play a role of a nucleating agent, polylactic acid is promoted to form fine and uniform crystals, and the mechanical property of the matrix is improved. Carbon dioxide is effectively wrapped in the foaming process, a micropore structure is formed in the fiber, the mechanical property of a matrix is enhanced, then secondary supercritical carbon dioxide treatment is conducted, the nano-silver is loaded into the matrix through supercritical fluid, the antibacterial property and the mechanical property are further improved, then the nano-silver is soaked in a silicate solution, dehydration is conducted, and the nano-silver fiber is obtained. A silica gel layer is formed on the surface of the fiber, so that the mechanical property and the antibacterial property of a matrix are enhanced.

The utility model relates to the technical field of medical instruments, in particular to a visual external ventricular puncture device and drainage device.The puncture device comprises a puncture part, a drainage part and a holding part which are sequentially arranged, an inner drainage cavity and a puncture cavity are formed in the drainage part, an outer drainage cavity is formed in the holding part, the outer drainage cavity is communicated with the inner drainage cavity, and the outer drainage cavity is communicated with the puncture cavity. The puncture part is installed in the puncture cavity, the end, away from the holding part, of the puncture part protrudes out of the end, away from the holding part, of the drainage part, the end, protruding out of the drainage part, of the puncture part is of a transparent tip structure, a micro camera is installed in the tip structure, the puncture device further comprises a display screen, and the micro camera is in communication connection with the display screen; a plurality of drainage holes are formed in the side wall, close to the puncture part end, of the drainage part and communicate with the inner drainage cavity; the puncture part is made of elastomer materials, and the drainage part is made of soft materials. Visualization can be achieved in the puncture process, and the blind puncture phenomenon is avoided; and accurate positioning can be achieved, and the drainage effect is improved.

The utility model discloses a woven headband containing wires, which comprises a main body assembly, and the main body assembly comprises a headband body, a woven belt connected to the outer surface of the headband body in a woven manner, and the wires woven in the headband body in a staggered manner; the woven belt comprises an outer protective layer, nylon fibers woven at the outermost end of the headband body, acrylic fibers woven on the inner sides of the nylon fibers, a fluorocarbon resin coating coated on the outer surfaces of the acrylic fibers, and polytetrafluoroethylene fibers woven on the inner sides of the acrylic fibers. The utility model solves the problems that the interior of the head band of the conventional head lamp in the market is not provided with an electric wire, the battery box needs to supply power to the head lamp through an external lead, so that the electric wire is exposed to influence the appearance, and the risk that the electric wire is stumbled or wound on other objects is increased; and the exposed electric wire is easily damaged by an object, a sharp object or a hard surface in an environment, so that the risk of electric wire breakage or electrical failure is increased.

The invention relates to the technical field of flexible electrodes, in particular to a fibrous flexible stretchable multi-channel electrode and a preparation method thereof, and the electrode comprises a plurality of laminated composite film layers and a packaging layer; each composite film layer comprises a stretchable polymer layer and a stretchable conductive layer; the width of the conductive layer is smaller than that of the polymer layer, and the conductive layer in the same composite film layer is completely covered and wrapped by the polymer layer in the length direction; the lengths of the polymer layers in different composite film layers are sequentially reduced from bottom to top; the length of the polymer layer in the adjacent upper composite film layer is smaller than that of the conductive layer in the lower composite film layer so as to realize exposure of an electrode detection point, and the length of each polymer layer in the adjacent composite film layers is greater than or equal to that of the conductive layer above each polymer layer. According to the fibrous flexible stretchable multi-channel electrode, the problems that a traditional multi-channel electrode is large in size, low in channel number and not stretchable are solved.