45results about How to "Operation has" patented technology

The invention discloses an Internet of Things based oil feeding and discharging state remote monitoring device for an oil tank truck. The device comprises a remote monitoring system and an oil tank truck detection system. The oil tank truck detection system comprises an oil quantity detection sensor, a data acquisition module, a microcontroller, a positioning module and a wireless communication module, the oil quantity detection sensor detects real-time quantity of oil in the oil tank truck, and the positioning module acquires a real-time position of the oil tank truck. The oil quantity detection sensor is connected with the microcontroller through a data acquisition module, the positioning module is connected with the microcontroller, and the microcontroller is connected with the remote monitoring system through the wireless communication module. The Internet of Things based oil feeding and discharging state remote monitoring device for the oil tank truck is effective in real-time quantitative remote monitoring of oil quantity variation and operating condition information of the oil tank truck and has advantages of simplicity, economy, convenience, intelligence, visualization, timeliness, easiness in operation and the like; especially, oil feeding / discharging quantity, remaining oil quantity and the like of the oil tank truck at different sits can be monitored automatically; in addition, an onsite control function is provided to make it convenient for manual operations under special or emergency conditions.

The invention provides a method for finishing cotton-nylon elastic woven fabrics, and the process flow comprises singeing, desizing, mercerizing, dry setting and preshrinking, which is characterized in that a step of cold batching yarding is added between the steps of singeing and desizing, and the steps of liquefying ammonia and pre-tendering are added between the steps of mercerizing and dry setting, therefore the whole process flow is as follows: singeing, cold batching yarding, desizing, mercerizing, liquefying ammonia, pre-tendering, dry forming and preshrinking. The invention has scientific and easily-operated process, compared with conventional cotton-nylon elastic woven fabrics, the cotton-nylon elastic woven fabrics obtained by the invention has better gloss, greatly improved fabric color brightness, no fold and turned edge on surface fabric, uniform fabric width, good tendering and setting effects, favorable elasticity up to 20-30% and the first-rate product rate above 99%, can further perfect the stability of product quality and satisfies high quality requirement on top grade fabrics.

This invention relates to a method for processing electrochemical combination electrodes sealed by the nm flexible epoxy resin material including: 1, inserting a working electrode matrix material into a conductive support copper rod wrapped with an insulation pyrocondensed tube, a hole Ag reference electrode is welded to the support copper rod, the bottom of a hole Pt counter-electrode is welded to the support copper rod, the hole Ag reference electrode, the hole Pt counter-electrode and the working electrode matrix are arrayed from inside to outside with the working electrode at the middle, the tops of which are at a same plane, the support copper rods of them are fixed by a pyrocondensed tube and put into a die set and fixed, 2, casting the nm flexible epoxy resin material onto the die set to deaerate and cure it, 3, taking out the electrode after cooling it and polishing it.

The sandwich heat-insulating light wall panel is made up by using crop straw and stalk as main raw material, matching with light ore powder, gelling agent and other components and sandwiching polystyrene foam plate and utilizing special-purpose equipment through one-step process. Its composition comprises straw and stalk powder 48-50%, light ore powder 35-42%, flyash 4-8%, halide powder 10-12%, glass fibre 1-2%, gelling agent 0.2-1%, fiore-resisting agent 0.5-0.8%, whitening agent 0.05-0.1% and solidifying agent 0.01-0.09%, and its internal core is polystyrene foam plate, its thickness is 30-100 mm.

The invention relates to a composite high molecular surfactant, a preparation method thereof and application of the composite high molecular surfactant in a foam coating process. Enabling chitosan, maleic acid and dimethyl 2, 3-trifluoropropenyl ammonium chloride to react at 90 DEG C to 110 DEG C under the action of a catalyst, the composite high molecular surfactant is formed. By compounding the composite high molecular surfactant and a micromolecule surfactant, and then adding a thickener and a three-proofing agent, a foam coating agent with good foaming performance, high solution viscosity, high foam film strength and good compactness is formed, and is applied to the foam coating process in the textile dyeing and finishing industry, the control on foam film thickness can be realized, and the liquid carrying quantity of foam is increased in a certain range, so that the thickness of a single-face coating is increased, the firmness of the coating is strengthened, and the problem that the single-face coating is not washable is solved.

The invention discloses a preparation method of a perovskite solar cell based on ionic liquid additives. The perovskite solar cell based on the ionic liquid additives includes a top electrode, a holetransport layer, a perovskite absorbing layer, an electron transport layer, a transparent conductive substrate and a bottom electrode, the hole transport layer, the perovskite absorbing layer and theelectron transport layer are arranged between the top electrode and the transparent conductive substrate from top to bottom, or the electron transport layer, the perovskite absorbing layer and the hole transport layer are arranged between the top electrode and the transparent conductive substrate from top to bottom, and the transparent conductive substrate is also provided with the bottom electrode. The preparation method is advantageous in that the operation is simple and easy, the cost is low, the toxicity hazard of the preparation process is small, the crystallization is controllable, the film quality is high, and a new thought is provided for high-efficiency and large-area preparation of the perovskite cells.

The invention discloses a heparin substitute expressed provided with the formula (1) of sulphonated and acidylated 6-carboxy-chitosan or the salt thereof. R expresses -H, -SO3H, or -COR<1>; R1 expresses -CH2OH, -COOH, -CH2OSO3H, or -CH2OCOR<1>; and R<1> represents C1-4 lower alkyl. The invention also relates to a preparation method of the compound. The invention has the advantages that the operation and the process are simple, and the dialysis and other tedious operation are not required for the purification of the product and the intermediate product; in addition, the reaction velocity is fast and easy to be controlled, and the sulphonated and acidylated 6-carboxy-chitosan is provided with biocompatibility and strong anticoagulant performance.

A multi-effect protecting agent for plant is prepared from Sichuan chinaberry, turmeric, flavescent sophora root, stemona root, etc through extracting and mixing. Its advantages are high effect and no pollution.

The invention discloses a sunscreen lotion for gently repairing and brightening skin. The sunscreen lotion consists of a multi-component sunscreen agent, a humectant, an emollient, an emulsifier, a thickener, a skin conditioner, a preservative, an aromatic agent and balance of water. The invention also discloses a preparation method of the sunscreen lotion. The preparation method comprises the following steps: Step 100, forming a water-phase component, pre-mixing methylenebis-benzotriazolyltetramethylbutylphenol / decylglucoside / xanthan gum / propylene glycol in the multi-component sunscreenagent, adding the mixture into a water-phase tank, mixing the mixture with the water-phase component, heating the water-phase tank in vacuum, carrying out heat preservation and stirring; Step 200, forming an oil-phase component, heating and stirring oil-phase component for dissolving; Step 300, pumping the water-phase component and the oil-phase component into a main tank, carrying out vacuum homogeneous emulsification, cooling, and adding the thickener and the preservative; and Step 400, continuously cooling, adjusting a state of the resulting solution, perform warming, adding the aromatic agent, discharging a semi-finished product from the tank, and completing preparation after detection. The sunscreen lotion has a strong sunscreen function and certain repairing effect, can brighten skin color, and further can reduce irritating components and side effects of the irritating components on the skin.

The invention relates to a fresh keeping method for meat, in particular to a fresh keeping method for chilled meat, and belongs to the technical field of food fresh keeping. The fresh keeping method comprises the following steps: placing the meat of a pig which is just slaughtered under the steam environment, and steaming the placed meat; cooling the steamed meat, and cutting the cooled meat into pieces of which the thickness is 1cm-2cm; coating a layer of a fresh keeping agent on the surfaces of the meat pieces, putting the coated meat pieces into fresh keeping bags, and refrigerating the put meat pieces at the temperature of 2-3 DEG C. The preparation method disclosed by the invention is simple in technology and easy to operate; substances used by the fresh keeping agent are processed by natural substances, can be directly used for preserving food, are safe to eat, and have a certain antioxidation effect and a certain antibacterial effect, so that the meat is safe to eat, the fresh keeping effect is good, food pathogenic bacteria such as bacteria, mould and microzyme can be well restrained, putridness of meat products can be prevented in the storage period, the color of meat is prevented from becoming bad, and the quality guarantee period of the meat products is prolonged; according to the method disclosed by the invention, influence of exudative juice of the meat on the quality of the meat products in the processes of storage, transportation and sale can be avoided, the conditions that meat fat is oxidized, the color of the meat becomes bad and microorganisms are bred can also be effectively controlled in the storage period, the sensory quality of the products is obviously improved, and the quality guarantee period of the products is obviously prolonged.

The invention relates to a construction robot for environment-friendly wall decorations, which comprises an adjusting device, a telescopic device, a connecting plate, a cutting device, a dual-purposedevice and a shearing device, wherein the telescopic device is installed on the front side of the upper end of the adjusting device, and the shearing device is installed at the lower end of the telescopic device, the connecting plate is installed at the front end of the telescopic device, the shearing device is installed at the upper end of the connecting plate, and the dual-purpose device is installed at the lower end of the connecting plate. The invention can solve the existing problems: in case of seaming anti-mold wallpapers, personnel are required to push the excess paper material betweenthe two wallpapers into a convex shape by means of a ruler, and then cut the paper material with a cutter, and a plurality of people are needed to cooperate; in case of cutting, a manual cutting is not flush, and the cutting is not complete, and the wallpapers may be pulled and damaged or stretched due to personnel not pressing the wallpapers stable; and in case of cutting the redundant wallpaperat the skirting line, as the skirting line is too low, the personnel will have difficulties to cut even the personnel bend down, thereby resulting in a long time consumption, a large labor intensityand a low efficiency etc.

The invention provides an improved composite material base / fiber interface shearing performance testing device which is characterized by comprising a clamp A and a clamp B. The clamp A and the clamp Bare provided with hollow rectangular frame structures, at least one set of grooves / protrusions are formed in one side wall of each rectangular frame structure, and a hole is further formed in the middle of the side wall of each rectangular frame structure. The side wall of the rectangular frame structure adjacent to the side wall provided with the groove / bulge is provided with a side hole for injecting a high-temperature-resistant adhesive / polymer resin material; after the clamps A and B are clamped and fixed through grooves or ptrotusions arranged on the clamps A and B, the two middle holesform a through hole through which a single carbon fiber passes; the fixed clamps A and B are located in the same plane, a hard plastic sheet is attached to the side face of the side, provided with thehollow rectangular frame, of each clamp A, and a hard paperboard is attached to the side face of the other side of each clamp B, so that the clamps A and B form a semi-closed cavity structure. The invention further discloses a testing method of the testing device. The testing device has the advantages of being simple in structure, high in controllability, convenient to operate and the like.

The invention discloses a cardiovascular medicine nursing monitor which comprises a frame, a display panel, an operation panel, a printing device, a paper inlet, a paper outlet, a printing switch, a monitor body, heat radiating holes, an external instrument connecting socket, an openable-closeable protecting cover, an oxygen mask, an oxygen hose, a moving push rod, a sterilizing cabinet, an oxygen generation control switch, universal wheels, pedal-type brakes, a suspension support, a wireless remote controller, an oxygenerator, a data analysis device and a data transmission device. The cardiovascular medicine nursing monitor is complete in function and convenient to use, is time saving, labor saving, complete in function, scientific, convenient, quick, safe, efficient, intelligent, accurate and flexible to operate when being used to nurse patients with cardiovascular medicine diseases, and has a sterilizing function, cross infection can be prevented effectively, and working difficulty of medical staff is reduced.

The invention discloses a color screen protective film. The color screen protective film mainly comprises a main film, a color composite glue layer, a composite PET (polyethylene terephthalate) film, an assembly glue layer, an assembly glue protective film, a scratch-resistant layer, a protective film glue layer and a scratch-resistant layer protective film, wherein the main film, the assembly glue protective film, the composite PET film and the scratch-resistant layer protective film are of film structure made of PET materials; and the assembly glue layer, the color composite glue layer, the scratch-resistant layer and the protective film glue layer are of glue structure with different properties. The invention also discloses a manufacturing method of the color screen protective film. The color screen protective film has the following advantages: the protective film is easy to assemble; the bubbles can be rapidly and automatically eliminated; the screen surface is free of residual glue after the protective film is removed; the protective film can be repeatedly pasted and used after being removed from the screen and has the functions of resisting scratch, resisting wear and preventing fouling; and as different colors of organic dyes and other dispersing aids are added to the polyurethane resins, the whole protective film has different colors after uniform dispersion. The manufacturing method of the screen protective film is simple, easy to operate and suitable for industrial production.

The invention discloses a chain ring blowout preventer lifting and transferring device. The device comprises a guide rail, travelling trolleys, a reduction gearbox, a motor, wheels, a ring chain hoist, a hooking rack, a connecting shaft, a control cabinet, a chain box, a control pipeline and a power pipeline. The device is characterized in that front and rear two travelling trolleys are arranged on the ring chain hoist, and are connected with the ring chain hoist by virtue of the connecting shaft; wheels are arranged on the inner sides of the travelling trolleys, and are suspended over the guide rail; and the ring chain hoist is of a steel plate welded integral structure, and joint bearings and safety lugs are arranged at two ends of the ring chain hoist. The ring chain blowout preventer lifting and transferring device has the advantages of compact structure, good no-voltage brake performance, strong corrosion resistance, flexible operation, large lifting force and stable operation.

The invention provides an operable balance moving device, a control method thereof, a storage medium and an electronic terminal. Compared with an existing electric balance vehicle, through the operable balance moving device, a balance vehicle can have the functions such as operation, execution, navigation and intelligent obstacle avoidance, is not limited to riding and walking and is more intelligent. In addition, the operable balance moving device is provided with a braking unit which is triggered to perform a braking task, can maintain device balance when a balance device is in a non-movingstate and a mechanical arm operates the task, and is equivalent to a second balance protection device for the balance moving device.

The invention relates to the technical field of coal mine tunneling machines, in particular to a full-hydraulic intelligent drilling, installing and anchoring all-in-one machine which has the functions of drilling, installing, anchoring and protecting simultaneously. The full-hydraulic intelligent drilling, installing and anchoring all-in-one machine specifically comprises a body, a drilling arm system, a scraper box device, an anchoring and protecting platform, and a conveying system, wherein the drilling arm system, the scraper box device, the anchoring and protecting platform and the conveying system are all arranged on the body. The full-hydraulic intelligent drilling, installing and anchoring all-in-one machine has the functions of drilling, installing, anchoring and protecting simultaneously, and multiple operations can be completed with one machine; the drilling arm system is used for drilling shot holes for achieving the purpose of filling explosives, and crushed rock blocks after blasting are cleared away and collected by the scraper box device and then are received by a second conveyor after being conveyed to the rear side of the body by the conveying system; the anchoring and protecting platform can carry out anchoring and protecting operation in a roadway; when the anchoring and protecting platform works, the scraper box device abuts against the top of the roadway for temporary support, so that safety of operation of workers is improved; and the machine can achieve the functions of drilling, installing, anchoring and protecting simultaneously, so that the laborintensity of workers is lowered on the premise of improving the work efficiency.

The invention discloses woolen cloth fabric easy to maintain. The woolen cloth fabric easy to maintain mainly comprises, by mass fraction ratio, 50-60 parts of wool fibers, 30-40 parts of improved polypropylene fibers, 20-30 parts of soybean fibers, 25-35 parts of viscose fibers, 15-30 parts of polyamide fibers and 15-30 parts of polyester fibers. The woolen cloth fabric easy to maintain has the advantages that the fabric prepared through the method can lower the cost of woolen cloth products, and improve the glossiness and the skin-friendly performance of products, fabric pilling is relieved, and the drapability of the fabric is improved; the fabric is smooth, easy to maintain, soft and smooth in hand feeling, light in weight, firm and durable. The prodding and itching feeling of traditional woolen type shirt fabric is eliminated, and the fabric has soft hand feeling and skin-friendly performance. The fabric has the performance of antibiosis, deodorization, warm keeping and pilling resistance, the cost of raw materials is low, the manufacturing method is easy, operation is easy, and the effect is remarkable.

This invention relates to a method for processing electrochemical combination electrodes sealed by the nm flexible epoxy resin material including: 1, inserting a working electrode matrix material into a conductive support copper rod wrapped with an insulation pyrocondensed tube, a hole Ag reference electrode is welded to the support copper rod, the bottom of a hole Pt counter-electrode is welded to the support copper rod, the hole Ag reference electrode, the hole Pt counter-electrode and the working electrode matrix are arrayed from inside to outside with the working electrode at the middle, the tops of which are at a same plane, the support copper rods of them are fixed by a pyrocondensed tube and put into a die set and fixed, 2, casting the nm flexible epoxy resin material onto the die set to deaerate and cure it, 3, taking out the electrode after cooling it and polishing it.

The invention discloses a milk tablet for improving endurance and a preparation method of the milk tablet, and belongs to the technical field of processing of dairy products. The milk tablet is characterized by comprising the following raw materials by weight percent: 70-87% of whole sugar powder, 5-25% of maca powder and 5-8% of beta-hydroxy-beta-methylbutyric acid calcium. The milk tablet has the advantages that the defects of poor taste and the like of the beta-hydroxy-beta-methylbutyric acid calcium and the maca powder are fully overcome, the beta-hydroxy-beta-methylbutyric acid calcium and the maca powder have synergic effects, the problems of muscle injury, fatigue and the like when people exercise are solved, and the milk tablet is simple in production technology, and easy to produce, and has market development potential.

The invention relates to the field of digital television conditional access, discloses a daughter card activating method for a set-top box, and overcomes the defects in activating a daughter card in a conventional mother-daughter card implementation mode. The summary of the main points of the technical scheme is that: when mother-daughter card information is registered, a front-end conditional access system (CAS) distributes a parity bit to each group of matched mother card and daughter card randomly and transmits the parity bit through entitlement management message (EMM); and the set-top box learns corresponding parity bit information and mother-daughter card information by analyzing the number of an inserted smart card; a specific parity bit can be viewed through a menu on the set-top box of the mother card; and the set-top box of the daughter card only stores the parity bit but cannot view or learn. When the daughter card is going to be limited or has been limited, the daughter card is activated by inputting the parity bit information of the mother card. The daughter card activating method for the set-top box is suitable for the mother-daughter card of a digital television set-top box.

The invention discloses a crawler-type household light and simple plant protection UAV (unmanned aerial vehicle) work support vehicle. The vehicle comprises a crawler chassis device and a carriage device, and has the characteristics that with the adoption of the crawler chassis device and a power device, the vehicle has strong adhesion with the ground, strong driving force can be provided, adaptability to the pavement is high, and the vehicle meets the short-distance demand; with the adoption of a small car chassis and the power device, the vehicle is small in size, reasonable in space utilization, low in cost and suitable for household use; a solar cell panel is arranged at the top of the carriage, so that the vehicle is energy-saving and environmentally friendly and meets the nationallyadvocated policies of energy conservation and environmental protection; a work platform is arranged at the top of the carriage, a protection fence is arranged, and the vehicle is applicable to flightoperation for high shrub crops; the vehicle is simple in structure, has functions of transportation, pesticide mixing, operation and lifting, and is high in reconstruction feasibility.

The invention relates to a preparation method for a liquid-filled pellet capsule with weight-reducing and health-care functions. The preparation method comprises the following steps: (1) vitamin-mineral pellets are prepared; (2) functional ingredient pellets are prepared; (3) pellet coating is prepared; (4) medium chain triglyceride and conjugated linoleic acid are dissolved by using water-solubleexcipient, so that mixture liquid 1 is obtained; (5) the mixture liquid 1 is mixed with silicon dioxide, glutin and water, so that mixture liquid 2 is obtained; (6) the prepared pellets are added with the mixture liquid 2 and an antioxidant and mixed, so that a liquid-filled capsule content is obtained; (7) a hollow capsule is filled with the liquid-filled capsule content. The pellets prepared bythe preparation method disclosed by the invention have the advantages of good roundness, moderate hardness and high yield. Moreover, the compound preparation obtained by the invention not only can prevent the interaction between medicines, but also can increase the stability of the preparation. The process of the method is simple and easy to operate.

The invention belongs to the technical field of textiles, and particularly relates to a finishing method of a copper ammonia hemp interweaved fabric. The method includes the steps: singeing; desizing;softening; tentering; preshrinking. According to a softening process, a fabric is woven when the content of the humidity is 50%, the air amount of a main fan is 70-90%, the air amount of a lower fanis 50-70%, the air amount of an exhaust fan is 40-60%, drying temperature is 110-130 DEG C, inner width is 110-120cm, reverse executing time is 3-8 seconds, and the speed is 8-20m / min. The finishing method of the copper ammonia hemp interweaved fabric is scientific in process and easy to operate. Compared with a conventional copper ammonia or hemp fabric, the interweaved fabric has more luster andsofter in hand feeling, wrinkles and turned edges of fabric surface are avoided, fabric width is uniform, the first-grade rate of the copper ammonia hemp fabric reaches 99% or more, stability of product quality is further improved, and high-quality requirements of high-end fabrics are met.

The invention discloses a PLC-based (programmable logic controller-based) park space control system, comprising a monitoring PC (personal computer), an entry control PLC, parking space sensors, an exit control PLC, an entry barrier system and an exist barrier system; the monitoring PC is connected respectively to the entry control PLC and the exit control PLC; the parking space sensors are connected respectively to the entry control PLC and the exit control PLC; the entry control PLC is connected to the entry barrier system; the exit control PLC is connected to the exit barrier system. The PLC-based park space control system being a PLC auto-control system has the advantages of good reliability, good operability, good flexibility and the like, design efficiency is greatly improved, maintenance period is short, debugging is convenient, the cost is low, operation is easy, the reliability is high, and the system has high practical value.

The invention discloses tea vinegar capable of clearing away heat and toxic materials. The tea vinegar is prepared from the following ingredients in parts by weight: 25-30 parts of peony flowers, 5-8parts of moutan bark, 10-15 parts of green tea, 12-16 parts of flos chrysanthemi, 7-10 parts of honeysuckle flowers, 6-10 parts of fructus forsythia, 3-7 parts of radix geutianae, 5-9 parts of radix trichosanthis, 7-11 parts of honey, 5-10 parts of lemon vinegar, 3-6 parts of vitamin, and 90-110 parts of purified water. The invention further discloses a preparation method of the tea vinegar capable of clearing away heat and toxic materials. For the tea vinegar and the preparation method, the raw materials are easily available, the preparation method is simple, and the industrial production canbe easily realized; the tea vinegar is rich in nutrition, has the palatable sweet and sour taste, has the rich tea aroma, is special in mouthfeel, and belongs to the novel health tea vinegar. The teavinegar has the efficacies of clearing away heat and toxic materials, helping producing saliva and slaking thirst, resisting bacteria and diminishing inflammation, and improving the body immunity.

A method for preparing a polymer flocculant belongs to organic polymer technology; the method is: in a pure nitrogen environment, dissolve soluble starch in water, gelatinize at 80-95°C for 0.5-1h, and cool the reaction system to 55°C ‑65°C, add compound initiator cerium ammonium sulfate and ammonium persulfate, pre-initiate reaction for 10‑30min, add acrylamide for graft copolymerization reaction for 2‑4h, then cool down the reaction system to 35‑45°C, add cationic etherification Agent 2, 3-epoxypropyltrimethylammonium chloride, etherification reaction 2-3h, use absolute ethanol to dehydrate the polymer and wash away unreacted soluble starch, dry at 30-50°C, The ionic soluble starch grafted acrylamide macromolecule flocculant is obtained by grinding; the method has simple technological process, easy operation, high synthesis efficiency and low production cost, and the synthesized macromolecule flocculant product has excellent flocculation effect and wide application.

The invention provides a high-speed serial signal channel simulation innovation method before layout, which is characterized by comprising the following steps: (1) quickly modeling according to an embedded template; (2) establishing a crosstalk relationship of channels between the models; (3) instantiating the model, and establishing a channel connection relationship; (4) setting high-speed serial signal channel simulation parameters; (5) simulating; (6) displaying result data and pictures; and (7) automatically outputting a report. The invention has the advantages of visualization, easy operation, high efficiency, time domain and frequency domain integration automatic simulation, and effectively solves the problems of many steps, easy error, non-visual crosstalk association, incapability of time domain and frequency domain integration simulation, incapability of directly outputting reports, time and labor waste, difficulty in maintenance and the like in the process of the traditional method.

The invention discloses a vascular interventional device with a radiation-proof function, which comprises a box body, a container arranged in the box body and a Y-shaped conduit. The top of the box body is connected with a radiation-proof glass with a handle through a hinge , the top of the conduit is fixed with a connecting pipe and a connecting pipe with an exhaust valve, the conduit is provided with a first check valve, an electric check valve and a second check valve; One end runs through the box and is connected to the syringe outside the box. The end of the connecting pipe away from the conduit extends into the container, and the container communicates with the elbow. The end of the elbow away from the container is connected to the one-way inlet outside the box. Air valve connection, the bottom end of the catheter is fixed with a micro-catheter, and the end of the micro-catheter away from the catheter is connected with the end of the micro-guide wire. The vascular interventional device with radiation protection function protects medical personnel and is convenient to operate.

The invention discloses a heparin substitute expressed provided with the formula (1) of sulphonated and acidylated 6-carboxy-chitosan or the salt thereof. R expresses -H, -SO3H, or -COR<1>; R1 expresses -CH2OH, -COOH, -CH2OSO3H, or -CH2OCOR<1>; and R<1> represents C1-4 lower alkyl. The invention also relates to a preparation method of the compound. The invention has the advantages that the operation and the process are simple, and the dialysis and other tedious operation are not required for the purification of the product and the intermediate product; in addition, the reaction velocity is fast and easy to be controlled, and the sulphonated and acidylated 6-carboxy-chitosan is provided with biocompatibility and strong anticoagulant performance.