30results about How to "Avoid barrier effect" patented technology

The invention belongs to the technical field of dust suppression and antifreezing solutions for bulk granular cargo transportation, and relates to a dust suppression and antifreezing solution for coal transportation and a preparation method thereof. The dust suppression and antifreezing solution for coal transportation has effects of efficient dust suppression and freeze protection. The dust suppression and antifreezing solution for coal transportation is prepared from 45 to 65 parts by weight of water, 10 to 38 parts by weight of anhydrous calcium chloride, 3 to 8 parts by weight of ethylene glycol, 5 to 10 parts by weight of glycerol, and 0.5 to 2 parts by weight of hydroxypropylmethyl cellose. The lowest anti-freezing temperature of the dust suppression and antifreezing solution is -55DEG C. The dust suppression and antifreezing solution for coal transportation is an improved antifreezing solution, improves a dust suppression function, viscosity, moisture retention and adhesion, reduces degrees of disintegration and volatility, improves product use performances and overcomes defects of the existing product.

The invention relates to a recombinant engineering bacterium with the surface exhibiting and expressing glutamic acid decarboxylase as well as a construction method and application of the recombinant engineering bacterium. The preparation method mainly comprises the steps of constructing ice nucleaiton protein-based recombinant engineering bacterium with the surface exhibiting glutamic acid decarboxylase, inoculating a glutamic acid decarboxylase recombinant engineering bacterium into a culture medium, carrying out shaking culture, adding IPTG or lactose to induce the expression of glutamic acid decarboxylase, and collecting recombinant bacteria with the surface exhibiting glutamic acid decarboxylase, wherein the recombinant bacteria with the surface exhibiting glutamic acid decarboxylase is used for preparation of gamma-aminobutyric acid from the substrate glutamic acid decarboxylation. According to the preparation method, a permeabilization treatment process required in whole-strain expression of conventionally expressed endoenzyme is avoided, recombinase is exhibited and expressed on the surface of the recombinant bacteria, and a substrate can be in contact with the recombinase to finish conversion without entering bacteria cells, so that the purpose of improving the expression activity of the recombinant bacteria is achieved. The preparation method is simple, convenient and low in cost, the operation is simple, and the expression activity of the recombinant bacteria can be efficiently improved.

An anorectal canal nursing device is composed of connecting tube, the air bag unit consisting of upper and lower air bags, air tube, air valve connected via air tube with said air bag unit, delivering tube, and dirt storage bag.

The invention discloses a nano metal grating manufacturing method and a nano metal grating. The method comprises the following steps: providing a substrate, and forming a flat layer on the substrate;forming an etching barrier layer on the flat layer; forming a metal layer on the etching barrier layer; forming an embossed rubber comprising grating periodic pattern on the metal layer; taking the embossed rubber as a mask, etching a metal layer, thereby forming the grating layer. By the mode above, a problem of decline in ability of obstructing water oxygen of the flat layer caused by etching for the flat layer and a problem of uneven display caused by optical diffraction are avoided.

The invention discloses a high-weather-resistance solar cell back plate, successively comprising a first weather resistance layer, an insulation and blocking layer, and a second weather resistance layer from inside to outside, wherein the first weather resistance layer is bonded with the insulation and blocking layer through an adhesion layer, the insulation and blocking layer is bonded with the second weather resistance layer through an adhesion layer; both the first weather resistance layer and the second weather resistance layer are silicon-fluorene fluorine-containing resin material layers; the insulation and blocking layer is a PET (PolyEthylene Terephthalate) layer; the adhesion layer is a blend layer of EVA (Ethylene-Vinyl Acetate copolymer) and JD919 amino tetra-functional epoxy resin. A manufacturing method of the high-weather-resistance solar cell back plate comprises the steps of plasma corona treatment, overlapping, laminating, and curing. The high-weather-resistance solarcell back plate disclosed by the invention has excellent weather resistance, electric insulation property, oxidation resistance, moisture resistance, hydrolysis resistance for preventing hydrolysis ofan adhesive for a long time, and barrier property.

The invention relates to a stagnation eliminating and stasis removing paste, and a preparation method and an application thereof, and belongs to the technical field of medical medicines. The paste comprises, by weight, 2-7 parts of Boswellia carteri, 2-7 parts of myrrh, 2-7 parts of pangolins, 2-7 parts of turtle shells, 2-7 parts of tortoiseshells, 2-7 parts of ground beetles, 2-7 parts of lumbricus, 2-7 parts of geckos, 2-7 parts of bear galls, 2-7 parts of corydalis tuber, 2-7 parts of panax notoginseng, 2-7 parts of Chinese Sage Herb, 2-7 parts of Chinese lobelia herb, 2-7 parts of Polygonum bistorta L., 2-7 parts of Hedyotis diffusa, 2-7 parts of Bulbus Fritilariae and 2-7 parts of honeycombs. The stagnation eliminating and stasis removing paste has the advantages of simple composition and substantial effects, can be used for treating internal organ accumulation, and pains and turgor complications caused by accumulation, and is simple and convenient to use.

Provided are an automatic drill pipe mounting and dismantling device and an engineering drilling machine. The drill pipe mounting and dismantling device includes a drilling machine base, a drilling machine platform rotatably arranged on the drilling machine base, a drill pipe tray, a tray lifting mechanism and a tray inclination angle adjusting mechanism, wherein the drilling machine platform is provided with a drill pipe to be mounted or dismantled, a pusher and a mounting and dismantling drill pipe transfer channel for transferring or moving out the mounted or dismantled drill pipe. The traylifting mechanism drives the drill pipe tray to transfer the mounted or dismantled drill pipe to be or from between the drill pipe to be mounted or dismantled and the pusher. The tray inclination angle adjusting mechanism includes a telescopic push rod with the two ends rotatably connected with the drilling machine base and the drill pipe tray respectively, the telescopic push rod drives the drill pipe tray to rotate, so that the inclination angle of the mounted or dismantled drill pipe is matched with the inclination angle of the drill pipe to be mounted or dismantled and the inclination angle of the pusher. The problem that the free end of a rocking arm of an existing engineering drilling machine has a high load and is damaged easily, the thrust and stroke length of a bracket adjustinghydraulic cylinder are limited, exploiting work can only be performed on an inclined coal layer with a small inclination angle, and the application range of the drill pipe mounting and dismantling device is limited are solved. The automatic drill pipe mounting and dismantling device has the advantages of being simple in structure, high in drill pipe mounting and dismantling efficiency and precise,and the posture of the drill pipe including the drill pipe tray can be adjusted randomly flexibly according to the design length of a hydraulic telescopic push rod.

The invention relates to dust-suppression anti-freezing liquid for railway coal transportation. The dust-suppression anti-freezing liquid is prepared from the following components in parts by weight:40 to 45 parts of anhydrous calcium chloride, 4 to 6 parts of magnesium silicofluoride, 9 to 16 parts of ethylene glycol, 15 to 20 parts of glycerin, 5 to 12 parts of hydroxypropyl methyl cellulose, and 2 to 6 parts of a preservative. The dust-suppression anti-freezing liquid has the advantages that by improving on the basis of anti-freezing liquid, the dust-suppression function, viscosity, moisturizing degree and adhesion force are increased, the decomposing degree and volatizing degree are reduced, the user property is improved, and the defects and disadvantages of the original product are overcome.

The invention discloses a local surface plasma resonant sensor and fabrication method and application thereof. The sensor comprises a transparent dielectric layer and silver films, wherein the transparent dielectric layer is obtained by preparation of a polycarbonate material and comprises a substrate and a nanometer column array, the nanometer column array is arranged on the substrate, the shapesand the cross sections of the top and the bottom of each nanometer column in the nanometer column array are same, the cross section area of the top of the nanometer column is larger than the cross section area of a middle part of the nanometer column, the bottom of the nanometer column is connected with the substrate, the silver films cover the top and the bottom of the nanometer column, gaps areformed between the silver film covering the substrate and the nanometer columns, and SiO2 / TiO2 composite coating layers are further coated on surfaces of the nanometer columns. The sensor is high insensitivity and accuracy and long in service lifetime and has favorable application prospect in the field of biochemical detection.

The invention discloses a skin beauty food formula and a preparation method of buccal tablets of the skin beauty food formula. The beauty food is the buccal tablets with a beauty effect, and comprises the following raw materials: beauty raw materials, a diluent, an adhesive, a flavoring agent and magnesium stearate. The beauty raw materials comprise collagen peptide, grape seed extract powder, hyaluronic acid, nicotinamide, vitamin C, coenzyme Q10 and other raw materials which can be used in the fields of foods and cosmetics. The buccal tablets are developed according to an oral mucosa ingestion theory, and have a better beauty effect than mainstream beauty foods on the market. Compared with other forms of beauty foods, the buccal tablets prolong the ingestion time of oral mucosa to functional substances; oral mucosa ingestion also avoids the first-pass effect of the liver, various barrier effects in a human body and damage to the functional substances due to severe environments of digestive organs such as intestines and stomach; and moreover, the oral mucosa is very close to facial skin, so that the absorbed functional substances can be easily transported or diffused to the facial skin at a relatively high concentration.

The invention discloses a permanent magnet hall thruster ignition device comprises an outer ceramic ring, an inner ceramic ring, an anode assembly, magnetic steel, a magnetic conductive base, a magnetic steel sleeve, excitation coils and a magnetic conductive ferrule; the magnetic conductive ferrule is installed on the outer wall of the magnetic steel in a sleeved manner; the magnetic conductive ferrule and the magnetic steel are installed in an annular positioning ring on the magnetic conductive base; and the excitation coils are installed between the inner wall of a magnetic steel sleeve andthe outer wall of the magnetic conductive ferrule through positioning of the annular positioning ring. In the ignition process, the excitation coils, a power supply of which is supplied by a cathodeheating power supply, generate a magnetic field with a direction opposite to a direction of an inherent magnetic field of the magnetic steel, and the intensity of the magnetic field at an outlet of adischarge channel is weakened, so that primary electrons emitted by a cathode can successfully enter the discharge channel, and arcing ignition of the thruster is facilitated; and after ignition of the thruster is finished, power supply of the excitation coils is cut off. By adopting the permanent magnet hall thruster ignition device, the ignition difficulty of a permanent magnet hall thruster canbe remarkably lowered, and extra burden caused to components such as a power supply processing unit, a propellant storage unit and a control unit cannot be generated at the same time.

The invention provides a distributed sound-sensitive optical fiber sensor and a manufacturing method thereof. The sensor comprises a hollow metal or non-metal protective sleeve and a metal or non-metal sheet arranged in the protective sleeve, and an optical fiber is laid on the sheet. According to the distributed sound-sensitive optical fiber sensor, the optical fiber is formed by melting and drawing high-purity quartz at a high temperature, the air or water pressure resistance of the optical fiber is very high, and the hollow protective sleeve is adopted instead of a loose sleeve of a conventional communication optical cable to protect the optical fiber, so that the air or water pressure resistance of the distributed sound-sensitive optical fiber sensor is greatly improved; the optical fiber is in direct contact with various media such as air or water, and sound or vibration transmitted through the air or the water can be directly transmitted to the optical fiber, so that the coupling efficiency between the sound or the vibration and the optical fiber is improved, and the distributed sound-sensitive optical fiber sensor is of great significance especially for deep sea long-distance large-range sound detection.

The invention discloses a drying box wind nozzle for colored coating. The drying box wind nozzle comprises an upper shell, a draught fan, a heating mantle, a ventilating duct, a positive pressure cavity, wind nozzle bodies, a lower shell and guide wheels. The heating mantle is arranged between the draught fan and the ventilating duct. The ventilating duct is of a hollow structure and is further arranged above the upper shell, and the ventilating duct communicates with the upper shell. The positive pressure cavity communicating with the ventilating duct is formed in the upper shell. The multiple wind nozzle bodies are arranged at the lower end of the positive pressure cavity. The sides, making contact with the positive pressure cavity, of the wind nozzle bodies and the sides, opposite to the positive pressure cavity, of the wind nozzle bodies are both provided with openings. End faces are arranged at the two ends, perpendicular to the side faces of the corresponding opening, of each wind nozzle body. The wind nozzle bodies are obtained in a punch-forming mode. The wind nozzle bodies extend out of the upper shell. The lower shell is located below the wind nozzle bodies, and the multiple guide wheels are arranged at the upper end of the inside of the lower shell. The problem that membranes are shaded after being dried by an existing wind nozzle can be effectively solved, and the wind nozzle strength is guaranteed.

The invention discloses a preparation method for an antimony oxide membrane. The preparation method mainly comprises the following steps: an antimony sulfide is dissolved in a mixed solution of ethidene diamine and 1,2-dithioglycol according to a rate that 0.01-0.03g of the antimony sulfide is added into every 11ml of the mixed solution of ethidene diamine and 1,2-dithioglycol, so that electrodeposition liquid is prepared; then two transparent electrodes are vertically arranged in an electrolytic cell containing the electrodeposition liquid for cathode constant-potential electrodeposition, wherein the voltage is 1.5 V-8V, and the electroplating time is 5-30 min; after the electrodeposition is finished, a uniform and compact membrane is deposited on a cathode; and the membrane electrode is soaked in water for 1-24 h, is subjected to thermal treatment for 1-10 min at 300-400 DEG C in a nitrogen atmosphere, and is naturally cooled to room temperature, so that the antimony oxide membrane is obtained on a conductive substrate. The manufacture method is simple, short in reaction time and high in productivity and is applicable to large-scale production of factories; the practicability is high; and the preparation method has good application prospect.

The invention relates to a recombinant engineering bacterium with the surface exhibiting and expressing glutamic acid decarboxylase as well as a construction method and application of the recombinant engineering bacterium. The preparation method mainly comprises the steps of constructing ice nucleaiton protein-based recombinant engineering bacterium with the surface exhibiting glutamic acid decarboxylase, inoculating a glutamic acid decarboxylase recombinant engineering bacterium into a culture medium, carrying out shaking culture, adding IPTG or lactose to induce the expression of glutamic acid decarboxylase, and collecting recombinant bacteria with the surface exhibiting glutamic acid decarboxylase, wherein the recombinant bacteria with the surface exhibiting glutamic acid decarboxylase is used for preparation of gamma-aminobutyric acid from the substrate glutamic acid decarboxylation. According to the preparation method, a permeabilization treatment process required in whole-strain expression of conventionally expressed endoenzyme is avoided, recombinase is exhibited and expressed on the surface of the recombinant bacteria, and a substrate can be in contact with the recombinase to finish conversion without entering bacteria cells, so that the purpose of improving the expression activity of the recombinant bacteria is achieved. The preparation method is simple, convenient and low in cost, the operation is simple, and the expression activity of the recombinant bacteria can be efficiently improved.

The invention relates to a disposable absorption product capable of rapidly conducting infiltration, which comprises a liquid-permeable surface layer, a liquid-tight bottom layer and a composite absorption core body, wherein the composite absorption core body comprises a first expanded paper layer, a first super absorbent resin layer, a fluffy non-woven fabric layer, a second super absorbent resin layer and a second expanded paper layer from top to bottom. The disposable absorption product is formed by sequentially stacking and connecting all the layers and structurally characterized in that (1) the fluffy non-woven fabric layer is cut into a plurality of fluffy non-woven fabric strips arranged in the width direction of the fluffy non-woven fabric layer in the width direction of the fluffy non-woven fabric layer; and (2) certain stretching force is applied to the two longitudinal ends of each fluffy non-woven fabric strip, the breadth ratio of each fluffy non-woven fabric strip subjected to stretching deformation is 60%-80%, the transverse width of the fluffy non-woven fabric strip is made to be synchronously narrowed, flow guide permeation through holes with long slits or long grooves are formed between the stretched fluffy non-woven fabric strips, and after the composite absorption core body absorbs the liquid in a saturated manner, the composite absorption core body is folded at the crotch position to form a fit concave shape.

The invention relates to a fresh-keeping film and a preparation method thereof. The preparation method for the fresh-keeping film comprises the following steps: to obtain a base layer, wherein the base layer comprises opposite first face and second face; coating a mildew-proof coating on the first face; and coating a separation coating on the second face, to obtain the fresh-keeping film. A double-face coating mode is used in the preparation method, the fresh-keeping coatings are coated on two faces of the base layer, and one face is coated with the mildew-proof coating, and the other face is coated with the separation coating. The fresh-keeping film has the good compactness, and better property of blocking water vapor and air, and has the good anti-mildew bactericidal effect. The fresh-keeping effect of the fresh-keeping film is improved by the synergistic effect of two coatings.

The invention relates to the technical field of copper strip manufacturing, and discloses a forming positioning device for copper strip manufacturing. The forming positioning device for copper strip manufacturing comprises two inverted-L-shaped fixing blocks, the two fixing blocks correspond to each other left and right, air cushions are fixedly connected to the bottom ends of the corresponding faces of the two fixing blocks, and touch plates are fixedly connected to the corresponding ends of the two air cushions. Through the arrangement of the touch plates, a spraying rod is triggered in a pneumatic mode to mark the protruding position of a copper strip, compared with an existing sensor detection mode, the beneficial effects of being rapid in response and high in stability are achieved, the device is suitable for being used for a long time, the two touch plates can change the distance according to the shape of the copper strip, and conveying of the copper strip is prevented from being hindered; and ink is sprayed only when the spraying rod corresponds to the protruding position of the copper strip, the ink is stored in a closed space in a sleeve at ordinary times, and therefore the problems that in existing spraying, the spraying effect is poor after drying, and cleaning is difficult due to dirt and ink dripping caused by continuous attaching of the copper strip are solved.

The invention discloses a preparation method for antimony sulfide films. The method is mainly characterized in that antimony sulfide is added into a mixed solution of 1,2-ethylenediamine and 1,2-ethanedithiol according to the proportion of 0.01-0.03 g of the antimony sulfide to per 11 milliliter of the mixed solution of the 1,2-ethylenediamine and the 1,2-ethanedithiol and is dissolved in the mixed solution, and electro-deposition liquid is obtained; two transparent electrodes are vertically arranged and placed into an electrolytic cell containing the electro-deposition liquid for cathode constant potential electro-deposition, the voltage is 1.5-8 V, the electroplating time is 5-30 min, uniform and compact films are deposited on cathodes after completion of electro-deposition; the electro-deposited films are subjected to heat treatment at 300-400 DEG C under nitrogen atmosphere and are naturally cooled to the room temperature, and the antimony sulfide films are obtained. The preparation method is simple, short in reaction time, high in productivity, suitable for batch production in factories and high in practicability, and the prepared antimony sulfide films can be applied to catalysis and solar cells and has broad application prospects in the field of photoconductive materials.

The invention discloses a high-weather-resistance solar cell back plate, successively comprising a first weather resistance layer, an insulation and blocking layer, and a second weather resistance layer from inside to outside, wherein the first weather resistance layer is bonded with the insulation and blocking layer through an adhesion layer, the insulation and blocking layer is bonded with the second weather resistance layer through an adhesion layer; both the first weather resistance layer and the second weather resistance layer are silicon-fluorene fluorine-containing resin material layers; the insulation and blocking layer is a PET (PolyEthylene Terephthalate) layer; the adhesion layer is a blend layer of EVA (Ethylene-Vinyl Acetate copolymer) and JD919 amino tetra-functional epoxy resin. A manufacturing method of the high-weather-resistance solar cell back plate comprises the steps of plasma corona treatment, overlapping, laminating, and curing. The high-weather-resistance solarcell back plate disclosed by the invention has excellent weather resistance, electric insulation property, oxidation resistance, moisture resistance, hydrolysis resistance for preventing hydrolysis ofan adhesive for a long time, and barrier property.

An anorectal canal nursing device is composed of connecting tube, the air bag unit consisting of upper and lower air bags, air tube, air valve connected via air tube with said air bag unit, delivering tube, and dirt storage bag.

The invention discloses a portable electronic device which comprises a first shell, a second shell, a circuit board, a display module, a touch panel, a NFC (near field communication) module and a NFC aerial, wherein the first shell and the second shell are assembled together, and the circuit board, the display module, the touch panel, the NFC module and the NFC aerial are arranged between the first shell and the second shell, and the NFC aerial is arranged around or at one side of the touch panel or at one side of the NFC module.

The present invention is concerned with concentrating radiation systems to increase the size and efficiency of solar radiation power plants, comprising large reflective surface fields in the form of a collector network, which concentrates radiation on a common receiver bridge, which enables the use of thermal, Photovoltaic or thermo-mechanical Stirling engine receiving components. The collector mesh is suspended from a very tall gantry structure and contains mirrors attached to the cable harness, forming a surface with a variable shape that can change shape and position by stretching and tilting its supporting structure, which Can be turned to track the position of the sun. Among other things, the present invention provides for mounting bridge-on-bridge receivers, which are longitudinally formed high above the solar radiation field. Each receiving tube provides another mobile module receiving facility such as a cable car or a fixed system to be attached longitudinally in series to the bridge. Depending on the installed receiving elements, the access of bridge structural support services, the installation of thermal fluid foundation lines and the electrical transmission network.

The invention provides a preparation method and application of a functionalized-graphene quantum dot-modified gel binder. The preparation method comprises the following steps: (1) preparation of functionalized graphene quantum dots, (2) preparation of the functionalized-graphene quantum dot-modified ion-conductive gel binder, and (3) preparation of a functionalized-graphene quantum dot-modified ion / electron-double conduction gel binder. When the prepared functionalized gel binder is applied to electrodes, not only can rapid transmission of ions and electrons in the electrodes be achieved, butalso the structural stability of the electrodes can be ensured, so that development needs of high-performance energy storage components are met.

A process for preparing the cubic crystal type FeS2 film by electric deposition, oxidizing and thermal sulfurizing includes such steps as electrically depositing Fe-S compound film on the electrically conductive glass subtrate in the aqueous solution of FeSO4 and Na2S2O3, oxidizing to obtain the precurse Fe3O4 film, and isothermal treating at 350-450 deg.C of sulfurizing temp to obtain cubic crystal type FeS2 film.

The invention relates to the technical field of traditional Chinese medicine, specifically to a traditional Chinese medicinal steam physiotherapeutic preparation for radical treatment of synovitis. The traditional Chinese medicinal steam physiotherapeutic preparation for radical treatment of synovitis is prepared from the following raw materials (by weight): 33-37 parts of Artemisia argyi, 33-37 parts of ginseng, 33-37 parts of radix aconite, 13-17 parts of achyranthcs bidentata blume, 13-17 parts of cortex cinnamomi, 13-17 parts of ramulus mori, 18-22 parts of levisticum, 18-22 parts of taxillus, 28-32 parts of spatholobus stem, and 28-32 parts of dandelion. Through percutaneous drug delivery, kidney-yang qi of lower limbs is recovered. With cooperation of an internal-use traditional Chinese medicinal preparation, drug efficacy is performed, internal and external treatment is formed, and physiological functions of lower limbs are comprehensively and thoroughly restored.

The invention belongs to the field of robots, in particular to a driving blade anti-winding device for an underwater sewage pipeline inspection robot. In view of the fact that the existing sewage pipeline has many impurities, the driving blades of conventional inspection robots are easily entangled by impurities during underwater inspection. problem, the following proposal is proposed, which includes a driving cabin installed at one end of the robot body, the section of the driving cabin is U-shaped, both ends of the driving cabin are provided with water inlet holes, and the middle position of the outer wall of the driving cabin is installed with a The embedded box is embedded in the installation groove opened on the side wall of the robot body. The motor is installed in the embedded box. The output shaft of the motor extends to the inside of the driving cabin and is connected with a bevel gear. Both sides of the driving cabin pass through The connecting piece is rotatably connected with a transmission rod one, and the end of the transmission rod one close to the water inlet is equipped with a turbine blade. The invention can prevent propeller blades from being entangled by underwater sundries, and has strong ability to get out of trouble.

The invention relates to a pain-relieving paste for muscles and bones and a preparation method and application thereof and belongs to the technical field of medical medicines. The paste comprises the following components in parts by weight: 2-5 parts of large-leaved gentian, 2-5 parts of radix clematidis, 2-5 parts of radix angelicae, 2-6 parts of peach kernels, 2-6 parts of flos carthami, 2-6 parts of frankincense, 2-6 parts of myrrh, 2-6 parts of ligusticum wallichii, 2-6 parts of radix achyranthis bidentatae, 2-6 parts of dried body of ground beetles, 2-6 parts of garter snakes and 0.1-1 part of musk. Compared with the prior art, the pain-relieving paste for muscles and bones, provided by the invention, have the advantages of being simple in formula, remarkable in effect and the like and can be used for treating pain in shoulders, neck, waist and legs, induced by various reasons.

The invention relates to a balloon catheter which comprises a catheter assembly and a balloon, and the balloon is arranged at the far end of the catheter assembly. The balloon catheter further comprises a drainage tube, and the drainage tube is arranged on the outer surface of the balloon. When the balloon is full, blood can circulate at the two ends of the balloon through the drainage tube. Due to the arrangement of the drainage tube, after the balloon fills the blood vessel, blood can flow between the near end and the far end of the balloon through the drainage tube, and therefore the balloon is prevented from completely obstructing blood flow in the blood vessel. And on the basis of ensuring that the balloon expands the blood vessel or blocks the aneurysm, the blood can still circulate in the blood vessel.