306results about How to "Keep shape" patented technology

The invention discloses silver powder and a preparation method and application thereof, and the preparation method of the silver powder comprises the following steps: dispersing a silver source in an alcohol amine compound solution, adding a dispersing agent, and then reacting with a C3-C27 fatty amine solution to prepare the silver powder. The micron silver powder is prepared through the hydrothermal method, the powder can be heated more evenly, the method is simple in process, short in reaction time and high in efficiency, the obtained micron silver powder is good in dispersity, and the tap density of the silver powder can reach about 7 g / cm < 3 >.

The invention discloses an electrocatalyst material for in-situ production of hydrogen peroxide through oxygen reduction as well as a preparation method and application of the electrocatalyst material, and belongs to the field of organic wastewater treatment. MoS2 / Fe porous conductive particles and a high-molecular polymer are adopted as main components, and ethanedioate and polyacrylamide are combined as a dispersion auxiliary solvent and a pore-forming agent to form a three-dimensional composite conductive catalyst material; through ultralow-temperature freeze drying and microwave radiation technologies, the material structure is optimized, the catalytic reaction active sites are improved, and efficient electrocatalytic oxygen reduction for in-situ production of hydrogen peroxide is realized; the MoS2 / Fe porous conductive particles not only optimize the performance of the catalyst, but also realize high-valued utilization of solid wastes; the electrocatalyst material has excellent conductivity, catalytic activity and organic wastewater degradation capability, is stable in removal effect before and after use, can be repeatedly used for multiple times, reduces the use cost, and provides a wide application prospect for the fields of environmental protection, energy and the like.

The invention discloses an electric reactor with internal coil stabilization and auxiliary heat dissipation, and relates to the technical field of coil stabilization, the electric reactor comprises a base, the top surface of the base is fixedly connected with an air-core electric reactor body, the outer surface of the air-core electric reactor body is provided with a coil body, and the top surface of the base is provided with a coil stabilization mechanism for preventing the coil from loosening. An auxiliary heat dissipation mechanism used for assisting heat dissipation of the reactor is arranged on the top face of the base, the coil stabilizing mechanism can clamp a loose coil, pressure can be applied more evenly through clamping and fixing, the coil is more stably fixed, the consistency of the shape and performance of the coil can be kept, and the service life of the reactor is prolonged. The clamping device can avoid direct compression and damage to an insulating layer of the coil, the insulating performance of the coil can be protected, the auxiliary heat dissipation mechanism can scrub the interior of the electric reactor, remove dust and sundries in the electric reactor, reduce heat resistance, improve heat dissipation efficiency and keep the electric reactor to operate within the normal working temperature range.

The utility model relates to the field of automobile parking space fire fighting equipment, and particularly discloses an intelligent fire extinguishing device for an automobile parking space, which comprises a fireproof cover, a support, a fire fighting nozzle, a temperature sensor, a smoke sensor and a lifting assembly, the fireproof cover is fixedly mounted right above the parking space through the support, and an opening is formed in the bottom of the fireproof cover; the fire-fighting sprayer, the temperature sensor and the smoke sensor are all installed in the fireproof cover, the lower end of the fireproof cover is sleeved with a first fixing frame, the first fixing frame is connected with the lifting assembly and moves up and down under the action of the lifting assembly, when the first fixing frame makes contact with or gets close to the support, the fireproof cover is completely folded, and when the first fixing frame makes contact with the parking space, the first fixing frame moves up and down. The fireproof cover is unfolded, and a closed space is formed between the fireproof cover and the parking space. The fire-proof cover can be used for isolating a vehicle on fire from surrounding vehicles or equipment, fire spreading is avoided, meanwhile, a water pool can be formed in the fire-proof cover to immerse a battery, and the final fire extinguishing purpose is achieved.

The invention relates to the technical field of cable safety early warning, in particular to a cable safety early warning system based on voiceprint recognition, which comprises a monitoring module, a data storage module, a data processing module, an analysis module and an alarm module. The data processing module performs fitting calculation on a burying collapse tendency parameter through a predetermined formula, determines a processing mode for the loudness acquired by the voiceprint sensor through the burying collapse tendency parameter, and determines the change condition of the loudness and the audio complexity in detail when the burying area of the cable is in a burying strong collapse tendency category; whether the alarm module is controlled to send out alarm information is comprehensively determined, and the cable safety monitoring efficiency is improved while the cable alarm accuracy is improved.

The invention relates to the field of marine surveying and mapping, in particular to a marine surveying and mapping positioning device which comprises a bearing plate, a waterproof cover is mounted at the top end of the bearing plate, and one end of a rotating rod penetrates through the rear side wall of the inner top wall of a first cavity and is fixedly connected with a plurality of spiral blades at equal angles. And a positioning assembly is installed in the second cavity, a crushing assembly is installed on the side wall of the rotating rod, and a repairing assembly is installed on the side wall of the spiral blade. The positioning assembly is arranged, a motor works to drive a rotating rod and a spiral blade to rotate, thrust generated by rotation of the spiral blade is utilized to drive the device to move towards the seabed, the spiral blade pushes the device to move downwards, the device dives in the vertical direction to a great extent, displacement of the surveying and mapping device under the action of seawater flow is avoided, and the surveying and mapping efficiency is improved. Therefore, the device can be prepared to be put into the surveying and mapping range, and the practicability of the device is improved.

The invention discloses a pipeline cutting device for building heating and ventilation construction, and particularly relates to the technical field of heating and ventilation pipeline cutting, the pipeline cutting device comprises a console, the rear end of the console is fixedly connected with a matching assembly, and the rear end of the matching assembly is fixedly connected with a cutting assembly. According to the pipeline cutting device for building heating and ventilation construction, the first supporting assembly and the cleaning assembly are arranged for cooperation, so that the surface of a heating and ventilation pipeline to be cut can be cleaned, and by cleaning impurities such as oil stains on the surface of the pipeline, a cutting device in the cutting assembly can make better contact with the surface of the pipeline; by arranging the first supporting assembly and the second supporting assembly for cooperation, automatic adjustment can be conducted according to the specific size of the heating and ventilation pipeline, the heating and ventilation pipeline to be cut is positioned, and the situation that a large amount of time and energy are consumed for traditional manual measurement and pipeline size adjustment is avoided; and the whole construction process is accelerated.

The invention discloses a high-flexibility bending-resistant synchronous twisted-pair shielding flame-retardant towline cable, and relates to the technical field of cables, the towline cable comprises a plurality of chain links, the plurality of chain links form a towline, the inner side of each chain link is provided with a cable structure, each chain link is provided with a cable blocking structure, the cable structure comprises an outer sheath layer, and the outer sheath layer is provided with an outer sheath layer. The inner side of the outer coating layer is provided with a braiding layer, the inner side of the braiding layer is provided with a wrapping layer, the inner side of the wrapping layer is provided with a core wire, the inner side of the core wire is provided with a conductor, the inner side of the wrapping layer is provided with a filler, and the cable structure is formed by synchronously completing pair twisting and total twisting of five types of oxygen-free copper flexible conductor wires or six types of oxygen-free copper flexible conductor wires. The outer diameter of the finished cable is small, the bending resistance of the cable structure is enhanced, the phenomenon that the cable structure is prone to open circuit and short circuit in the high-frequency bending process is avoided, and meanwhile, through the cooperative use of the cable blocking structure and the disassembly and assembly structure, when the single cable structure is damaged, independent disassembly and replacement can be carried out.

The utility model discloses a preserved fruit processing rapid sugar infusion device which comprises a vertical frame and a sugar infusion barrel, and a lifting piece is arranged in an inner cavity of the vertical frame; the stirring piece is arranged on the surface of the lifting piece, connecting pieces are arranged on the two sides of the sugar permeating barrel, and an overturning piece is arranged on the outer side of one connecting piece. After soaking is finished, the driving piece is started and can drive the sugar permeating barrel to rotate with the rotating rod as the axis, so that the top opening of the sugar permeating barrel rotates to be in a downward inclined state, fruits in the inner cavity of the sugar permeating barrel can flow out more smoothly under the action of gravity, and compared with a mode of manually taking out the fruits, the fruit soaking device is more convenient to use. According to the method, the labor cost can be saved, manual intervention can be reduced, part of syrup can be attached to the surfaces of the fruits and flow out along with the fruits due to the viscosity of the syrup, the syrup on the surfaces of the fruits is reserved to the maximum extent, the loss of sugar in the separation process is reduced, and therefore the sweetness and taste of the preserved fruits are ensured.

The invention discloses an automatic stereoscopic warehouse system for pipe storage, which comprises a goods shelf and a plurality of pipes, and further comprises a plurality of groups of placing racks, two fixing plates are rotatably mounted on each of the plurality of groups of placing racks, the plurality of fixing plates are connected with the goods shelf through a rotating structure, and the rotating structure is used for driving the plurality of groups of placing racks to rotate and lift. The pipes are stored, taken and placed in a rotary mode and matched with a staggered Z-shaped placing method, the effective utilization of the storage space in a warehouse is achieved, the two ends of the pipes are effectively blocked while the pipes are stored, invasion of water and moisture can be prevented, the risk of pipe surface corrosion is reduced, the service life of the pipes is prolonged, and the production efficiency is improved. And in the pipe storage and taking-out process, self-adjusting type loading and unloading opening and closing are conducted on the storage opening, the pipe storage efficiency is greatly improved, deformation caused by external pressure or impact in the pipe storage process can be prevented, and it is ensured that the original shape and performance of the pipe are kept.

The utility model discloses a self-powered friction structure and an insole. The self-powered friction structure comprises a negative electrode structure which comprises a first negative electrode material layer, a conductive fabric layer and a second negative electrode material layer which are connected in sequence, and the conductive fabric layer is located between the first negative electrode material layer and the second negative electrode material layer; the positive electrode structure comprises a positive electrode material layer and a base layer which are connected with each other; the plurality of elastic columns are uniformly distributed and are connected with the second negative electrode material layer and the positive electrode material layer to form a hollow structure; the first negative electrode material layer and the second negative electrode material layer adopt an electric polarity material different from that of the positive electrode material layer; the negative electrode structure, the elastic column and the positive electrode structure are integrally formed. According to the self-powered friction structure and the insole, the self-powered friction structure is integrally formed, has the advantages of being high in durability and stable in voltage output, can be conveniently cut at will, and meets the requirement for large-scale production.

The invention discloses a near-infrared light response ultrathin nanosheet sulfur-doped BiOCl photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following technical steps: (1) preparing a BiOCl nanosheet; and (2) preparing the sulfur-doped BiOCl nanosheet. By adopting a secondary hydrothermal method and controlling the dosage of thioacetamide and BiOCl nanosheets, the prepared catalyst is an ultrathin nanosheet with uniform morphology, the average size is 70-120nm, the catalyst has light response in a near-infrared light region of 780-1200nm, the light absorption capacity of the catalyst is better, and near-infrared light response can be achieved. The catalyst is applied to catalytic degradation of ENR, the ENR degradation rate under visible light is 66.87%, and the degradation effect is good; under near-infrared light, the ENR degradation rate is 9.25%, and the degradation performance from zero to existence is achieved. The preparation method disclosed by the invention is simple, mild in condition, easy to control, low in raw material consumption, free of complex operations such as centrifugation, low in preparation cost and easy to popularize and apply.

The utility model discloses a pair of elastic opening and closing shoes easy to put on and take off. The shoe body comprises a sole, a vamp and an elastic piece; the vamp comprises a half sole part, a heel part and a connecting part which are all connected to the sole, the connecting part is close to the sole and is connected with the lower end parts of the half sole part and the heel part, and the upper end parts of the half sole part and the heel part are separated from each other; the heel part is suitable for being switched between a first state and a second state under the action of external force, when the heel part is in the first state, the heel part is close to the half sole part and matched with the half sole part to form a shoe opening, and when the heel part is in the second state, the heel part is far away from the half sole part and enables the shoe opening to be opened; the elastic piece is connected with the half sole part, the heel part and the connecting part and is suitable for being unfolded under the action of external force, so that the heel part enters the second state; and when the external force is lost, the elastic piece rebounds and resets, so that the heel part returns to the first state. The utility model provides an elastic opening and closing shoe easy to put on and take off, which is easy to open, has excellent recovery performance and ensures the convenience of the shoe in the putting on and taking off process.

The utility model relates to the technical field of tea garden trimmers, in particular to an electric bilateral trimmer for a tea garden. According to the technical scheme, a storage battery is installed on a rack, a steering shaft is rotatably installed on the rack, a handle is welded to the top end of the steering shaft, a front fork is inserted into the bottom end of the steering shaft, and a front wheel is rotatably installed on the steering shaft through the front fork; trimming blades are slidably installed on the two sides of the rack through a first connecting plate and a second connecting plate, sawteeth are arranged at the bottom ends of the trimming blades, a motor is fixed to the second connecting plate through a support, the support penetrates through the trimming blades and is fixedly connected with the motor, and an eccentric shaft is arranged at the output end of the motor; and the motor stirs the trimming blade through the eccentric shaft, so that the trimming blade performs lifting motion. The electric bilateral trimmer for the tea garden integrates the advantages of maneuverability, stability, flexibility, efficiency, humanization and the like, so that the electric bilateral trimmer for the tea garden is more suitable for complex trimming requirements in a tea garden environment.

An optical lens provided by the present invention comprises a lens barrel, and a lens group and a spacer element group which are assembled in the lens barrel, the spacer element group at least comprises a first spacer element and a second spacer element, the first spacer element is located between a first lens and a second lens and is in partial contact with the image side surface of the first lens, and the second spacer element is located between the second lens and the second lens. The second spacing element is positioned between the second lens and the third lens and is in contact with the image side surface part of the second lens; the maximum height L of the lens cone and the effective focal length f of the optical lens meet the following conditions: 2.44 lt; l / flt; 3.15, 3.15; the effective focal length f2 of the second lens, the spacing distance EP12 between the first spacing element and the second spacing element in the direction of the optical axis, and the center thickness CT2 of the second lens meet the following conditions: 2.90 mm <-1 > lt; (CT2 / EP12) / f2lt; 6.56 mm <-1 >. According to the invention, the problem that miniaturization and assembly stability of an optical lens in the prior art are difficult to consider at the same time is solved.

The invention discloses a fireproof fire-resistant flame-retardant shielding control cable, and relates to the technical field of control cables, the device comprises a fixing plate, the top of the fixing plate is provided with a conductor, the exterior of the conductor is provided with a sheath, the outer surface of the sheath is fixedly connected with a reinforcing layer, and the reinforcing layer is internally provided with an anti-extrusion assembly used for absorbing and dispersing impact force. An auxiliary assembly used for rapidly mounting and dismounting the cable fixing clamp is arranged outside the reinforcing layer, protrusions distributed at equal intervals are arranged on the surface of the reinforcing layer, and irregular extrusion blocks are arranged in the protrusions, so that when a cable falls off or is extruded, the protrusions on the surface of the cable make contact with the ground firstly, and the protrusions on the surface of the cable make contact with the ground. The reinforcing layer at the protruding part is thick and can absorb and disperse impact force, reduce direct impact on the conductor and protect the internal structure of the cable from being damaged, the irregular extrusion block extrudes the reset spring when moving, the spring has certain buffering force, and the buffering force of the spring can prevent excessive deformation of the cable.

The invention discloses a new energy ship pipeline fixing support and a fixing method thereof, and relates to the technical field of pipeline fixing.The new energy ship pipeline fixing support comprises a U-shaped transverse plate, a plurality of translation plates are arranged in an opening of the U-shaped transverse plate, an arc-shaped supporting plate is arranged above the translation plates, and a pair of arc-shaped clamping grooves are formed in the two sides of the bottom face of the arc-shaped supporting plate; a pair of arc-shaped sliding plates are clamped in the pair of arc-shaped clamping grooves in a sliding mode, an arc-shaped clamping plate is fixedly arranged at the top end of each arc-shaped sliding plate, and the arc-shaped supporting plate and the pair of arc-shaped clamping plates form an annular clamping cavity; and a pipeline is placed above the U-shaped transverse plate and is inserted into the annular clamping cavities in a penetrating manner. By means of the annular clamping cavity, the pipeline can be evenly stressed in all radial directions in the circumferential direction, and three-dimensional stress balance is achieved; the distance between the translation plates is adjusted according to the length of the pipeline, the clamping force can be evenly distributed in the length direction of the pipeline, and the translation plates and the clamping force jointly ensure that the pipeline can be stably clamped in all directions.

The utility model belongs to the technical field of casting dies, and particularly relates to a machining die for metal castings, which comprises a base, a radiating module is arranged above the base, two liftable lower die holders and an upper die holder are respectively arranged above the base, two sides of the upper die holder are provided with die cavities, and the die cavities are communicated with the radiating module. The upper die holder is fixed on the base, the upper die holder is matched with the two lower die holders through overturning, a mounting frame is fixed on the base, the heat dissipation modules are mounted on the mounting frame, the number of the heat dissipation modules is two, the heat dissipation modules directly face the lower die holders and the upper die holder, and a supporting plate is arranged on the base; firstly, the upper die base is arranged to be of a double-face structure to be matched with the two lower die bases, the pouring efficiency can be guaranteed, the temperature of a die plate which is not subjected to die casting can be lowered to the proper temperature, and therefore the die casting efficiency and efficiency of each time are guaranteed; and the lifting lower mold base is matched with the demolding plate, so that the demolding work of the part is facilitated, and the purpose of improving the working efficiency is achieved.

The utility model discloses a sports shoe upper and a shoe, the sports shoe upper comprises a shoe upper base layer, the shoe upper base layer comprises a first splicing part, a second splicing part and a third splicing part, the first splicing part corresponds to a forefoot area and a heel area of a human foot; the second splicing part is positioned in the middle section area of the arch between the front sole area and the heel area; the third splicing part extends along the edge of the vamp, is connected with the sole and is connected with the first splicing part and the second splicing part; the fixing line is arranged at the junction of the first splicing part, the second splicing part and the third splicing part; the vamp base layer is formed by splicing a first splicing part, a second splicing part and a third splicing part, and the splicing parts are regions which are formed by weaving TPU yarns in an interweaving mode and have different weaving intensities. According to the sports vamp and the shoe, the softness and hardness of each part of the vamp base layer are adjusted by arranging the areas with different weaving intensities on the vamp base layer, the vamp fits the foot movement of a user, and the sports performance of the user is improved.

The utility model relates to the field of automobile fire-fighting equipment, and particularly discloses a movable automobile intelligent fire extinguishing device which comprises a fireproof cover, a fire-fighting sprayer, two lifting assemblies and a telescopic arm, the bottom of the fireproof cover is provided with an opening, the lower end of the fireproof cover is provided with a lower fixing frame, and the upper end of the fireproof cover is provided with an upper fixing frame. The bottom of the fireproof cover is connected with the lower fixing frame, the top of the fireproof cover is connected with the upper fixing frame, the fireproof cover is driven by the lifting assemblies to be folded on the lower fixing frame or unfolded to form a closed space, the telescopic arm is located between the two lifting assemblies, and the two ends of the telescopic arm are connected with the lower fixing frame and the fire fighting truck respectively. The fire-proof cover is combined with a fire fighting truck, the fire-proof cover can be used for isolating an on-fire automobile from surrounding automobiles or equipment, fire spreading is avoided, meanwhile, a water pool can be formed in the fire-proof cover to immerse a battery, the final fire extinguishing purpose is achieved, and compared with a water gun fire extinguishing mode, the fire extinguishing efficiency can be improved, and fire extinguishing safety can be ensured; and water resources are greatly saved.

The utility model relates to the technical field of steel wire automatic forming machines, in particular to a full-automatic steel wire wavy line forming machine which comprises an installation frame, a line pressing assembly is arranged at the bottom of the installation frame, and an extension module is arranged on the side face of the installation frame. The full-process automatic production of the wavy line formed by the steel wire can be completely realized, each part of the machine is simple and practical, the machine has the characteristics of low cost and high efficiency, the labor cost is saved, the risk of industrial injury is avoided, the machine is an advanced specialized machine, the driving motor is used as a power source, and the production cost is reduced. The driving motor drives the first gear and the second gear to rotate through the transmission structure, then conveying of the steel wire and forming of the wavy line are achieved, and the straightness of the steel wire in the conveying process and the regular shape of the formed wavy line are guaranteed through arrangement of the first straightener and the second straightener.

The utility model relates to the technical field of rubber sealing ring production, and discloses a shaping device for rubber sealing ring production, which comprises a processing table, and a water storage tank is arranged at the top of the processing table; the supporting rod is arranged at the top of the machining table; and the top cover is arranged at the top of the supporting rod. The hydraulic cylinder is started, the hydraulic cylinder operates to drive the heating plate and the upper die block to move, when the upper die block is matched with the lower die block, the heating plate is started to heat the upper die block, so that a gap of a die is tightly filled with a rubber material, after the rubber material forms a required shape, the upper die block and the heating plate are recycled, and the water pump is started again. The water pump operates to suck water in the water storage tank through the water suction pipe, then the water is conveyed into the splitter plate through the water conveying pipe, and the water is sprayed out through the spray head to cool a rubber material, so that the effect of rapidly cooling the rubber sealing ring to maintain the shape and performance of the rubber sealing ring is achieved.

The invention belongs to the technical field of preparation of refrigerant pipes, and particularly relates to a preparation method of a flexible stainless steel refrigerant pipe, which comprises the following steps of: S4, internal leveling: performing leveling treatment on the interior of a welded pipe by using leveling equipment to ensure that the inner and outer surfaces of the pipe are smooth so as to facilitate subsequent processing and improve the quality of the pipe. According to the preparation method of the flexible stainless steel refrigerant pipe, after a transmission motor controls a transmission gear to rotate, power can be transmitted to a plurality of rotating abutting wheels through meshing of the transmission gear and a transmission thread, the rotating abutting wheels rotate to drive a to-be-machined part to rotate, and therefore the circumferential surface of the to-be-machined part can be leveled; and the polishing stone on the surface can polish the outer surface of the to-be-machined workpiece to ensure that the inner surface and the outer surface are smooth and flat.

The invention discloses an industrialized seedling raising method for tissue culture seedlings of Eucalyptus robusta in autumn and winter in the Xiaoqing region, and relates to the technical field of plant seedling raising. The seedling culture method comprises the following steps: transplanting tissue culture seedlings of Eucalyptus robusta after seedling hardening into a completely infiltrated matrix section for culture, spraying a winter seedling culture compound foliar fertilizer during culture, and then putting container seedlings into a tray and putting the tray into a Eucalyptus robusta winter seedling culture shed for culture. Wherein the Eucalyptus robusta winter seedling raising shed sequentially comprises an elevated seedling raising system, a second-stage heat preservation shed and a third-stage heat preservation shed from inside to outside, a two-layer air cushion buffer structure can keep the temperature in the shed stable, the elevated seedling raising system comprises a seedbed, a water retention and root promotion layer and an inner heat preservation shed, and the water retention and root promotion layer is made of acrylic cotton. The invention also provides a formula of the compound foliar fertilizer for seedling raising in winter. The seedling raising method provided by the invention effectively solves the problems of excessive growth of stems of Eucalyptus robusta seedlings in winter, hibernation of tissue culture seedlings of Eucalyptus robusta and easy damping-off due to high humidity.

The invention relates to a corrosion-resistant toughened PVC (polyvinyl chloride) pipe as well as a preparation device and a preparation process thereof. The device comprises an extruder, a cooling water tank and a cooling cylinder, and a water storage mechanism and a spraying mechanism are arranged on the cooling cylinder; the water storage mechanism comprises a water storage sleeve, and a water storage cavity is formed between the water storage sleeve and the outer wall of the to-be-cooled pipe; the rotating seat is coaxially and rotatably mounted in the cooling cylinder, and the water storage sleeve is mounted on the rotating seat; the water storage sponge is annular and is mounted at one end, far away from the spraying mechanism, of the water storage sleeve; the driving assembly is used for driving the rotating seat to rotate on the cooling cylinder; the spraying mechanism comprises a spraying pipe communicated with an external high-pressure water source; and the multiple nozzles are distributed on the spraying pipe at equal intervals, and the spraying directions of the nozzles point to the water storage cavity. Cooling water is sprayed into the water storage cavity through the nozzles and forms the cooling water jacket along with rotation of the water storage jacket, the contact duration of the cooling water and the pipe is prolonged, the cooling effect of the cooling water on the pipe to be cooled is improved, and the use amount of the cooling water is reduced.

The invention relates to the technical field of food, and particularly discloses a preparation method of an oil gel-based shredded cake. The oil gel is adopted to replace existing common edible oil to prepare the shredded cakes, and the prepared shredded cakes are obvious in layering phenomenon and have excellent sensory quality and high stability.

The invention discloses a flexible and stable three-layer porous structure hemostatic dressing and a preparation method thereof, and belongs to the technical field of biological medicine. The preparation method of the hemostatic dressing comprises the following steps: constructing a stable foaming system by using protein and polysaccharide, constructing a dual three-dimensional network by combining multi-source polysaccharide and tannic acid, and designing a large-area dressing structure by overlapping the dual three-dimensional network with cotton gauze; carrying out Ca < 2 + > cross-linking impregnation and freeze drying in a weak acid environment to prepare an integrally formed three-layer dual-network multi-source porous structure dressing; the dressing has three layers of different structures, has an extremely fast hemostatic effect, reduces the amount of bleeding, can effectively maintain the humidity of a wound, avoids invasion and infection of bacteria, and can quickly and effectively sterilize; good shape maintaining and recovering capability is realized; meanwhile, the advantages of the porous structure and the cotton gauze are integrated, the structure is enriched, the structural stability of the large-area dressing is improved, the dressing can be stored for a long time in a normal-temperature environment, and the physical basic performance of the dressing meets the requirements of medical dressings.

The utility model relates to a thermoplastic polymer pipe variable-diameter thinning mould and equipment capable of ensuring the shape of a conical end part, which comprises a first module and a second module, a first mould cavity of the first module comprises a first equal-diameter pipe cavity, a first conical pipe cavity and a first connecting cavity between the first equal-diameter pipe cavity and the first conical pipe cavity; a second die cavity of the second die set comprises a second equal-diameter pipe cavity, a second taper pipe cavity and a second connecting cavity between the second equal-diameter pipe cavity and the second taper pipe cavity, the inner diameter of the second equal-diameter pipe cavity is larger than the inner diameter of the first equal-diameter pipe cavity and smaller than the outer diameter of the pipe, the die cavity comprises an equal-diameter cavity and a taper pipe cavity, and the taper of the taper pipe cavity is consistent with the taper of the taper end of a finished balloon product. And the shape and the taper of the end part of the blastocyst can be kept while the pipes at the two ends of the blastocyst are thinned. Meanwhile, the conical end part of the balloon embryo can be heated and stretched when being positioned in the conical tube cavity, and after the step, the end part even does not need to be stretched and shaped independently, but only needs to be shaped together with the whole balloon, so that the processing technology is simplified, and the production efficiency is improved.

The present invention discloses a recombinant collagen and its use in cartilage repair matrix. The recombinant collagen provided by the present invention comprises a sequence shown in SEQ ID No.1; the amino acid sequence of the recombinant collagen comprises N basic repeating units, and the basic repeating unit contains n1 of the following characteristic amino acid sequences: "G‑Xaa1‑Xaa2‑G‑E‑Xaa3"; the 3' end and the 5' end of the basic repeating unit are connected to form the above-mentioned characteristic amino acid sequence. The recombinant collagen provided by the present invention has a relatively obvious integrin binding activity, has the effects of promoting cell adhesion, proliferation, differentiation, repairing cartilage tissue defects, etc., and has good application prospects.

The invention relates to the technical field of pipeline dredging, in particular to a pipeline dredging and dredging robot. The pipeline cleaning device comprises a shell, a rotating head is rotationally installed at one end of the shell, a plurality of brush plates used for cleaning the inner wall of a pipeline are slidably installed on the outer side of the rotating head, and a crushing conical head used for crushing hard sundries in the pipeline is slidably installed at the end, away from the shell, of the rotating head. Through the arrangement of the brush plate, in the rotating process of the brush plate, centrifugal force generated by rotation of the rotating head enables the brush plate to abut against the inner wall of the pipeline more sufficiently, then the brush plate can further clean the inner wall of the pipeline, the situation that stubborn dirt is attached to the inner wall of the pipeline is avoided, and meanwhile, the brush plate is convenient to clean. And the brush plate is fully abutted against the inner wall of the pipeline, so that a certain polishing effect on the pipeline can be achieved, the inner wall of the pipeline is smoother, and dirt is prevented from being adhered to the inner wall of the pipeline again.