318results about How to "Promote escape" patented technology

The invention belongs to the technical field of welding, and discloses a dissimilar metal power modulation galvanometer laser welding method which comprises the following steps: finely cleaning a 6061 aluminum alloy and a 304 stainless steel plate by using acetone, and then airing for more than 20 minutes; the aluminum steel sheet is assembled, pressed and fixed on a welding test platform in a steel-up-aluminum-down mode; the position of the welding test platform is adjusted, argon serves as welding protection gas, and a protection gas nozzle is arranged to be aligned with a welding pool area; laser welding parameters are set, a laser power modulation mode is set to be a gradient power mode, and the gradient power mode is to regulate and control phase point laser power in a circular scanning track in the advancing direction of a welding seam; a welding test is carried out in the mode that a galvanometer laser head is fixed and a welding test platform is moved, and a laser and the welding test platform are synchronously started and stopped; and the protective gas is started 5 seconds before the laser is started, and after the laser is stopped, the protective gas is stopped lagging for 10 seconds so as to continuously protect the welding seam and prevent oxidation.

The invention belongs to the field of biomedical materials, and particularly relates to a preparation method of collagen tripeptide and an obtained product. Compared with the prior art, the method has the advantages that by adding alkali to soak the cowhide particles and combining treatment means such as denaturation and enzymolysis, the destroy denaturation of a triple helix structure of collagen in the cowhide can be promoted, the collagen can be thoroughly subjected to enzymolysis, so that the yield of collagen tripeptide is higher, the molecular weight is small and concentrated, and meanwhile, the foreign flavor in the cowhide can be effectively removed; subsequently, mixed enzymes jointly act on collagen peptide bonds, so that generation of collagen tripeptide is facilitated; in the operation process of the method, acid or alkali does not need to be added for multiple times to adjust the pH, and the generated collagen tripeptide is low in ash content; after suction filtration and impurity removal, impurities in the collagen tripeptide are reduced, and the yield of the obtained collagen tripeptide freeze-dried product is high; under the synergistic effect of all the treatment processes, the prepared product is fine and smooth in component, free of fishy smell and foreign flavor and good in water solubility.

The invention relates to the technical field of thrust bearings, in particular to a preparation method of a tin-based babbitt metal bushing and the tin-based babbitt metal bushing. The preparation method of the tin-based babbitt metal bushing comprises the following steps that a transition layer containing tin is arranged on the surface of a thrust pad, plate-strip-shaped tin-based babbitt metal is arranged on the transition layer, pressure and ultrasonic waves are applied to the surface of the plate-strip-shaped tin-based babbitt metal, and welding is completed through ultrasonic pressure welding. According to the method, the tin-containing transition layer is arranged on the surface of the thrust pad, the thrust pad bushing is rapidly prepared through ultrasonic pressure welding, and element diffusion and hydrogen element escape among the bushing, the transition layer and the steel backing and atomic lattice distortion and electron movement between the babbitt metal bushing and the transition layer are promoted through the coupling effect of extrusion force and high-frequency vibration; the plate-strip-shaped tin-based babbitt metal is welded to the surface of the thrust pad to form the bushing, the prepared babbitt metal bushing coating is uniform and compact, the preparation technology is greatly simplified, and environment friendliness is achieved.

The present invention discloses a high-pressure water jet edge cutter. It comprises an edge cutter mechanical structure, an edge cutter high-pressure water jet pipeline and an edge cutter high-pressure water jet nozzle; the edge cutter high-pressure water jet pipeline is located inside the edge cutter mechanical structure; the edge cutter high-pressure water jet nozzle is embedded inside the edge cutter mechanical structure and is connected to the edge cutter high-pressure water jet pipeline. The present invention has the advantages of spraying high-pressure water to fracture rocks and can solve the problem of TBM jamming. The present invention also discloses a hydraulic-mechanical combined rock-breaking and TBM cutter disc. The present invention also discloses a hydraulic-mechanical combined rock-breaking and escape method.

The invention discloses a Trop2 targeting chimeric antigen receptor macrophage as well as a preparation method and application thereof. The macrophage contains a specific CAR (chimeric antigen receptor) targeting Trop2 and a blocking agent for blocking an immunosuppression signal; the amino acid sequence of the Trop2 specific CAR targeting the breast cancer is as shown in SEQ ID NO. 1; the nucleotide sequence of the mRNA of the specific CAR of the targeted Trop2 is as shown in SEQ ID NO. 2. According to the invention, LNP is adopted to co-deliver CAR mRNA and TLR agonists, and macrophages are edited in vivo to generate CAR-macrophages expressing Trop2 in situ, so that a tedious engineering cell in-vitro preparation process is omitted, and potential whole-body toxic and side effects caused by immune cell system reinfusion are avoided.

The invention discloses a zirconium-nickel dissimilar metal welding method based on active regulation and control of a temperature field. The zirconium-nickel dissimilar metal welding method comprises the following steps that S1, base metal is cleaned; the butt-joint end faces and the welding surfaces of the zirconium and nickel alloy pipes are polished and cleaned, and clean zirconium and nickel base materials are obtained; s2, a to-be-welded part is assembled; the to-be-welded end face of the clean base metal is assembled in a protective gas cavity of the rotary clamping device; s3, welding is conducted; a laser scanner is adopted for welding at a preset welding position, heat source gradient distribution of base metal at the two ends of a welding seam is controlled by regulating and controlling laser power, welding seam temperature field feedback is established through an infrared temperature sensor, and real-time monitoring and laser power regulating and controlling are conducted; s4, postweld heat treatment; and the laser power is adjusted in real time according to welding seam temperature field feedback so as to adjust and control the welding seam cooling process. According to the method, effective connection of zirconium-nickel indissolvable metal is achieved by controlling the regional welding temperature field, the temperature range for forming brittle compounds is avoided, the uniformity of a molten pool between Zr and Ni materials is ensured, and welding defects such as hot cracks and air holes are reduced.

The utility model provides a self-circulation liquid path device aiming at a perovskite solution coating process, which comprises double Y shafts, rails of the double Y shafts are connected to the lower part of a gantry in a sliding manner, the upper part of the gantry is fixedly connected to the upper part of a spray head, a conveying pipe fitting is arranged at the rear part of the spray head, and a drainage pipe fitting is arranged at the end part of the conveying pipe fitting. A negative pressure device is arranged at one end of the drainage pipe fitting, a positive pressure device is arranged at the other end of the drainage pipe fitting, gas in a solution is extracted through negative pressure, and the situation that liquid remaining in spraying of the spraying head drips and leaks due to the gravity effect, a sample is polluted, and film coating of the sample fails is avoided; and the negative pressure device can extract gas from the solution supplied into the spray head, the solution containing bubbles is subjected to vacuum treatment, and the bubbles can be promoted to expand and escape from the surface of the solution by reducing the pressure, so that the bubbles are eliminated.

The invention discloses a manufacturing method of a second type low-smoke halogen-free standard wall cable of a motor train unit, which relates to the technical field of cables and comprises the steps of conductor preparation, insulation extrusion, buffer isolation layer forming, shielding layer manufacturing, reinforced core preparation and installation, sheath extrusion and post-processing. The conductor is prepared by layering and twisting cerium-titanium alloying copper monofilaments and treating the cerium-titanium alloying copper monofilaments through a nano ceramic coating; post-processing detection shows that the cable is small in bending radius, low in electrical and mechanical performance attenuation rate after repeated bending, excellent in electrical performance, mechanical performance, fireproof performance, environmental protection performance and the like, capable of effectively meeting the cable use requirements under complex working conditions of the motor train unit, capable of guaranteeing the operation reliability and safety, capable of improving the comprehensive performance of the cable and wide in application range. The cable is suitable for power and signal transmission in rail transit fields such as motor train units.

The invention relates to the technical field of metal welding, and discloses a welding process of high-strength medium alloy carburizing steel, which comprises the following steps: preheating the whole weldment to 200-250 DEG C before welding; the overall temperature of a weldment is kept at 200-250 DEG C in the welding process; and after welding is completed, a weldment is integrally heated to 250-300 DEG C, and heat preservation is conducted for preset time. According to the scheme, a new preheating technology in the welding technology is provided for the high-strength medium alloy carburizing steel, overall preheating is adopted before welding, during welding and after welding instead of local preheating, the temperature ranges before welding and during welding are kept consistent, the temperature range after welding is slightly higher than the temperature ranges of the first two stages, it is advantageously kept that the temperature of a mother part in the whole welding stage is stable and uniform, and the welding quality is improved. The temperature gradient in the whole welding process is reduced to the minimum, and through appropriate process steps and welding parameters, it is guaranteed that weld joints do not have welding defects, and meanwhile the mechanical property requirements of products are met.

The invention discloses a polypeptide, a polypeptide / siRNA compound and application thereof, and belongs to the field of biological medicine preparations. The amino acid sequence of the polypeptide disclosed by the invention is as follows: Nap-FFKYGFRRGHHHHRHHHR or Nap-FFKYGFRRGHHHHKHHK. A polypeptide / siRNA compound formed by the polypeptide and siRNA is uniform in particle size and good in stability, the hydrophobic end of the polypeptide / siRNA compound can respond to cathepsin B in lysosome to be assembled into nanofibers, a membrane of the lysosome is damaged, and then escape of the lysosome of the siRNA is promoted; after the siRNA / cationic peptide part is released into cytoplasm, the cationic peptide responds to the change of cytoplasm pH to reduce the electropositivity of the siRNA molecule, so that efficient cytoplasm delivery of the siRNA molecule is realized, and the siRNA molecule is promoted to play a silencing effect. The embodiment of the invention shows that the Pep / siRNA compound disclosed by the invention has relatively strong in-tumor retention capacity in a mouse body and can effectively inhibit the growth of breast cancer tumors.

The utility model discloses an energy storage battery fire-fighting device which comprises a placing cabinet and a fire-fighting box, a motor and an audible and visual alarm are installed on the upper surface of the fire-fighting box, a smoke and fire detector is installed on one side face of the fire-fighting box, a two-way screw rod is installed in the fire-fighting box, an auxiliary gear and a moving block are installed on the peripheral side face of the two-way screw rod, and the moving block is connected with a push-pull rod. A baffle and a discharging plate are connected into the fire-fighting box, and the motor is connected with a main gear. By arranging the two-way screw rod, the moving block, the push-pull rod and the discharging plate, when a battery pack is on fire, the smoke and fire detector detects smoke and fire and transmits an electric signal to the audible and visual alarm and the motor, the audible and visual alarm gives an alarm to remind a worker, the motor drives the two-way screw rod to rotate through meshing between gears, and the discharging plate is arranged on the two-way screw rod. And the two moving blocks move back to back, the moving blocks push the discharging plate downwards through the push-pull rod, so that phosphate slides into the containing cabinet along the discharging plate, fire extinguishing is carried out, and economic losses can be effectively reduced.

The utility model discloses a truck cab convenient to escape and ventilate, which belongs to the technical field of trucks and comprises a cab body, truck doors are arranged on two sides of the cab body, window bodies are arranged in the truck doors, a first window door is arranged behind the truck doors, a first window is arranged in the first window door, and a second window is arranged in the second window door. A second window door is arranged on the rear portion of the cab body, a second car window is arranged in the second window door, glass in the window body, the first car window and the second car window descends, when an accident occurs, a driver and passengers can escape from the rear portion, the left side and the right side of the cab body, a plurality of escape channels are additionally arranged, escape is convenient, and when the cab is used at ordinary times, the window body is not prone to falling off. Ventilation can be enhanced, the view can be increased, a driver can have a rest sufficiently, and the practicability of the cab body is improved; the stability of a driver during escape can be guaranteed through the arranged crawling ladder, fire extinguishing operation can be conducted through the arranged water pump, water tank, water outlet pipe and sprinkler head, and the functionality of the escape device is enhanced.

The invention relates to the technical field of aluminum-copper alloy surface treatment, in particular to an aluminum-copper alloy micro-arc oxidation film layer and a preparation method thereof.The preparation method comprises the following steps that a base material is pretreated; a micro-arc oxidation electrolyte is prepared, an electrolyte in the micro-arc oxidation electrolyte is composed of sodium silicate, sodium hydroxide and soluble oxalate, a solvent is water, the pretreated base material is placed in the micro-arc oxidation electrolyte to be subjected to micro-arc oxidation, the aluminum-copper alloy micro-arc oxidation film layer is obtained, and specific electrical parameters of micro-arc oxidation are as follows: the current density is 3A / dm < 2 >-5A / dm < 2 >, the current density is 3A / dm < 2 >-5A / dm < 2 >, and the current density is 3A / dm < 2 >-5A / dm < 2 >-5A / dm < 2 >; according to the method, the porosity of the aluminum-copper alloy micro-arc oxidation film layer is synergistically reduced by optimizing the electrical parameters and the concentration of the electrolyte, and then the corrosion resistance of the film layer is improved.

The utility model discloses a steel door with an automatic alarm function, which comprises a door frame and is characterized in that a steel door is hinged to the inside of the door frame, a smoke alarm is arranged on the surface of the steel door, an escape door is hinged to the inside of the steel door, a driving assembly is arranged inside the steel door, and the smoke alarm is arranged on the surface of the escape door. Through the arrangement of the smoke alarm, smoke generated by combustion can trigger the smoke alarm, so that the smoke alarm gives out an alarm sound to remind people in a building, through the arrangement of the explosion-proof glass, people outside the steel door can conveniently observe the internal fire condition, through the arrangement of the fireproof filler and the flame-retardant layer, heat transmission can be reduced, and the fire-proof effect is improved. And through arrangement of a driving assembly, a second bevel gear rotates, then a two-way lead screw is driven to rotate, a moving plate is moved, then a clamping block is separated from a clamping groove, an escape door can be opened, and indoor people can escape conveniently.

The invention provides a carbon fiber thermoplastic composite box and a preparation method, and relates to the technical field of box forming. Comprising the following steps: S1, arranging carbon fiber thermoplastic prepregs according to a set layer number to obtain a laminated green body, and preheating the laminated green body; s2, carrying out hot press molding on the laminated green body areas forming the box body flat plate parts, and keeping a softening state between the adjacent areas to obtain box body flat plates which are dispersedly arranged on the laminated green body; s3, carrying out hot stamping on the laminated blank body in the softened state to obtain a bulge in the same stamping direction; and S4, the protruding part of the laminated blank is heated and bent, and the box body structure is defined by the box body flat plates. Due to the fact that all the components of the box body are cured and formed step by step, that is, uncured hole channels are reserved in the laminated green body in the first hot press forming process, resin flowing and gas escaping in the laminated structure are facilitated, and therefore microdefects are eliminated, and the stability of the product performance is improved.

The invention relates to the technical field of adhesive tape production, in particular to bubble inspection treatment equipment for electrical adhesive tape production, which comprises a rack, a mother roll and a rewinding roll are sequentially and rotatably mounted on the rack, the mother roll and the rewinding roll are sequentially positioned on two sides of the rack and are correspondingly arranged, and quick release mechanisms are arranged at joints of the mother roll and the rewinding roll with the rack. A tension set adjusting mechanism is arranged at the position, located at the interval between the mother winding roller and the rewinding roller, of the rack, and a fine adjustment driving mechanism used for driving the tension set adjusting mechanism is arranged on one side of the rack. Through cooperative use of the bubble extrusion processing mechanism, adhesive tapes can be extruded by the extrusion roller during rewinding, so that the adhesive tapes are attached more tightly, bubbles are discharged through the extrusion roller, the bubbles are effectively avoided, meanwhile, due to the fact that the extrusion roller is an electromagnetic heating roller, the adhesive tapes can be effectively softened, and the service life of the adhesive tapes is prolonged. Therefore, the adhesive tape can be attached to the surface more easily after being wound, and bubbles can be effectively removed.

The invention provides an escape platform, and relates to the technical field of lifting devices, the escape platform comprises a bearing platform and a fixing frame, the fixing frame is arranged in a hole formed in a building vertical face, and the bearing platform is movably connected with the fixing frame; when the bearing platform is in a closed state, the bearing platform is clamped in the fixing frame so as to block the hole; when the bearing platform is in the open state, the bearing platform moves to the outer side of the building vertical face so as to form a platform for escape personnel to stay. According to the escape platform, the escape platform is arranged at the position, where escape is convenient, of each floor of the building, and meanwhile the escape platform can serve as a part of the building when closed and can also be used for achieving the functions of daylighting, ventilation, smoke exhaust and the like of a window; when the device is opened, a platform can be formed on the outer vertical face of the building, certain bearing capacity is achieved, and escapers can gather on the platform to wait for rescue or descend to a safe position through a slow descending device to escape from danger.

The invention belongs to the field of biological medicine, and particularly relates to a polysaccharide modified liposome nano vaccine as well as a preparation method and application thereof. The polysaccharide modified lipidosome nano vaccine is composed of an anionic polysaccharide shell containing a D-glucuronic acid skeleton and a drug-loading cationic lipidosome inner core coated in the polysaccharide shell, and the cationic lipidosome inner core is loaded with an anionic antigen OVA. The polysaccharide-modified lipidosome nano vaccine containing the sulfuric acid acetyl structure has more excellent capability of overcoming inherent barriers of lung mucosa vaccines, and has the advantages of good stability in a lung microenvironment, high biological safety, capability of enhancing in-vivo triple immunity (cell, body fluid and mucosa reaction) and the like; the method has a wide prospect in lung vaccine development and design, and can also be used for vaccine delivery of other administration routes.

The invention belongs to the technical field of soil improvement, and particularly relates to a preparation method and processing equipment of a soil conditioner. A biomass raw material is added into monocalcium phosphate to be mixed, then the mixture is added into a material conveying pipe and passes through a pyrolysis device, the pyrolysis device comprises three heaters used for controlling three different temperature areas, the pyrolysis temperature is gradually increased to 500 DEG C from 300 DEG C, generated biomass charcoal is cooled and enters a cyclone separator to be mixed with humus soil, and the humus soil is separated from the biomass charcoal. After mixing, the mixture enters a collector to be continuously stirred and mixed, and meanwhile, liquid bio-oil generated by cooling in the cooling tower is sprayed to the collector through a spraying system to be mixed with the mixture; according to the present invention, the carbon fixation ability of the soil is improved, the soil structure is improved, a variety of plant growth elements are provided, the soil fertility is improved, the growth of microorganisms is promoted, the soil improvement effect is improved, the occurrence of plant diseases and insect pests is inhibited, and the healthy growth of crops is promoted.

The utility model belongs to the technical field of cantilever devices, and particularly relates to an anti-collision cantilever device which comprises a cantilever body. One side face of the cantilever body is fixedly connected with a positioning frame, and a sensor is installed in the positioning frame. Through the arrangement of the cleaning mechanism, a sensor and a range finder can be cleaned, the possibility that dust is attached to the sensor and the range finder is reduced, the anti-collision cantilever is installed on a bucket wheel machine, high-pressure gas is pumped into an air inducing pipe, a piston moves, the piston drives a rack to move, a baffle plate moves upwards, and a positioning frame is exposed; when the anti-collision cantilever and the bucket wheel machine stop, an external fan stops synchronously, a baffle plate moves downwards to conduct positioning on the positioning frame, and dust is blown into the positioning frame through a plurality of blowing pipes which are distributed at equal intervals, so that dust attached to or floating on the sensor and the distance measuring instrument is removed, and the induction sensitivity of the sensor and the distance measuring instrument is prevented from being affected by the dust. Dust is prevented from being attached to the sensor and the range finder when the bucket wheel machine does not run.

The invention discloses a concealed reciprocating balcony escape device, and relates to the technical field of escape fire-fighting supplies, the concealed reciprocating balcony escape device comprises a mounting frame body, the upper side of the mounting frame body is hinged with a cover plate; the pulley assembly is mounted on the corresponding side wall of the mounting frame body; the section of the lifting platform is matched with the inner cavity of the mounting frame body, and the lifting platform can be flatly placed in the mounting frame body; the speed limiter is mounted in the mounting frame body, and the lifting platform is in transmission connection with the speed limiter through a lifting inhaul cable; wherein the middle of the lifting inhaul cable is wound on the pulley assembly, and the lifting platform can descend at a constant speed under the limiting effect of the speed limiter. The escape device can be used without climbing or professional training, escape is facilitated, special crowds can use the escape device conveniently, meanwhile, guide rails or stand columns do not need to be arranged, the space below the escape device is not occupied, and it can be ensured that daily use of the space below the escape device is not affected.

The escape channel for the tunnel comprises a pre-buried seat, a water storage cavity is formed in the inner side of the pre-buried seat, a filtering structure is arranged on the inner side of the water storage cavity, the inner side of the pre-buried seat extends to form a water pumping pipe, the other end of the water pumping pipe is connected with a water conveying pipe, and a water pump is arranged on the surface of the water pumping pipe; by means of combined use of a water pump, a water pumping pipe, a spraying pipe and a spraying head, follow-up effective spraying treatment can be conveniently conducted on fire spreading in the escape channel, so that the fire spreading into the escape channel can be prevented from affecting escape of people, and then the practicability and safety of the escape channel in use are improved; when the water pump works, spraying water in the water storage cavity can be input to the inner side of the spraying pipe through a water pumping pipe and a water conveying pipe, then the spraying water is sprayed out through the arranged spraying head, spraying fire extinguishing treatment is conducted on the fire, and escape of follow-up personnel is facilitated.

The present invention relates to the field of paste resin production, specifically a paste resin latex VCM circulation purification and removal system and process, including a VCM gas-liquid separation tank and a VCM gas-liquid separation tower, the two are connected in series through a VCM circulation pipeline and a discharge pipeline; the feed pipeline transports the original latex containing VCM monomers to the VCM gas-liquid separation tank for stirring, and VCM is separated from the latex during the stirring process and discharged into the VCM exhaust pipeline; the latex containing the remaining VCM gas phase enters the VCM circulation pipeline and is steam-heated to 70-80°C, and the heated latex enters the VCM gas-liquid separation tower in a vacuum environment, and VCM is recovered by spraying; the latex falling into the bottom of the tower enters the VCM gas-liquid separation tank again through the discharge pipeline, and the cycle is repeated until the latex VCM monomer content in the VCM gas-liquid separation tank reaches less than 200ppm, and the finished latex can be discharged to the next process. The present invention can remove VCM in the latex to the greatest extent, and at the same time solve the problems of agglomeration of the inner wall of the traditional stripping tower and easy clogging of the steam nozzle.

The utility model discloses a slewing bearing structure of an excavator, which comprises a slewing bearing inner ring and a slewing bearing outer ring, the slewing bearing inner ring is connected with the slewing bearing outer ring, and an inner tooth structure is arranged on the inner side wall of the slewing bearing inner ring. The end face of the slewing bearing inner ring is provided with first installation holes which are evenly distributed on the slewing bearing inner ring, the end face of the slewing bearing outer ring is provided with a second installation hole, a third installation hole, a fourth installation hole and a fifth installation hole, and the excavator protection device achieves the functions of protecting an excavator and facilitating entering and exiting and escaping.

The present invention discloses a self-induction type acoustic wave agglomeration device, belonging to the technical field of particle agglomeration. The present invention comprises a Hartmann whistle pneumatic sound source and a horn, wherein a gap is provided between the air outlet end of the Hartmann whistle pneumatic sound source and the horn; the Hartmann whistle pneumatic sound source and the horn are connected as a whole through a connecting mechanism; the wide mouth end of the horn is connected to the agglomeration chamber; the air source of the Hartmann whistle pneumatic sound source is provided with air by an air compressor. In the device of the present invention, the spacing between the outer wall of the nozzle and the horn and the spacing between the nozzle and the resonance cavity will generate self-induction at a certain ratio, and the external gas can be continuously sucked into the agglomeration chamber without the need for an induced draft fan, and the fine particles in the air flow can stay in the agglomeration chamber for a period of time for agglomeration, and finally the agglomerates are discharged from the side opening.

This utility model provides an auxiliary casting device for casting molds, relating to the field of casting equipment technology. Specifically, it includes two bases. One base has an L-shaped fixing seat fixedly installed on one side. Two hydraulic cylinders are mounted on the top of the L-shaped fixing seat, and both cylinders penetrate and are fixedly connected to the L-shaped fixing seat. The other base is slidably connected to the L-shaped fixing seat. Two pedestals are positioned between the two bases, and two casting mold bodies are mounted on the sides of the two pedestals that are close to each other. This application uses a servo motor output to drive a fixed rod and a cam to rotate, and a return spring to push the casting mold bodies fixed on the pedestals back to their original position, generating a periodic thrust to achieve auxiliary vibration of the mold. This vibration effectively breaks the bubble structure inside the casting liquid, causing the bubbles to escape, and simultaneously pushes the casting liquid to flow fully into the corners and gaps of the mold cavity, ensuring that the casting liquid is evenly distributed within the mold.

This disclosure provides a light-emitting diode and a method for manufacturing the same. The light-emitting diode includes an epitaxial structure; the epitaxial structure has a plurality of protrusions located on a first surface, and the epitaxial structure also has a mesh-like isolation groove formed on a second surface and extending toward the first surface, the epitaxial structure being divided into a plurality of epitaxial units by the isolation groove; the bottom of the isolation groove is spaced apart from the first surface; in a direction perpendicular to the second surface of the epitaxial structure, the connection between the sidewall of the isolation groove and the bottom surface of the isolation groove corresponds to the middle portion of the protrusion; the first surface and the second surface are two opposite surfaces of the epitaxial structure.

A coal pyrolysis oil-increasing device and process, comprising a coal slurry preparation unit, a buffer tank, a tubular heating furnace, a coke tower, a fractionating tower, a tar collection unit and a coke collection unit connected in sequence from left to right; wherein the coal-oil slurry preparation unit comprises a coal powder bin, a screw feeder, a flow meter, an agitator, a coal slurry tank and a tank bottom pump connected in sequence from left to right; the tank bottom pump is connected to the buffer tank. Starting from the mechanism of the pyrolysis process of coal, the present invention focuses on affecting the primary pyrolysis of coal, and realizes coal pyrolysis oil-increasing by strengthening the generation of free radicals and the escape of free radicals during the pyrolysis of coal. Solve the problem of high hydrogen consumption in existing hydrogenation pyrolysis. Low metamorphic coal has a high oxygen content, and most of it exists in the form of phenolic hydroxyl groups, which will react with hydrogen free radicals to generate water during hydrogenation pyrolysis. The pyrolysis process adopts a coal-oil slurry feeding method, and there will be no dust (oil-coated coal) when entering the pyrolysis furnace for pyrolysis, which solves the problem of low tar yield in the existing coal pyrolysis process.

This utility model discloses a novel window breaker, including a window breaking component and a cutting component. The cutting component includes a connecting block, a telescopic spring, a limiting plate, a button, and a blade. Operation via the button controls the blade to extend for cutting ropes, safety belts, etc. The window breaking component has a striking pin, a pressing element, an outer spring, and an inner spring. The striking pin is located inside the pressing element; the outer spring controls the pressing element's reset, and the inner spring controls the striking pin's extension. In use, the tube is held, the pressing element is pressed against the glass, and then the tube is pressed, causing the striking pin to eject and break the window. Upon ejection, the striking pin rotates due to the structure of the second guide groove, improving window breaking efficiency. The advantages of this technical solution are: it combines window breaking and cutting functions, addressing various emergency situations; it is easy to operate, both cutting and window breaking are simple and easy to learn; the structure is compact, making it easy to carry and store; the blade and striking pin will not be accidentally triggered when not in use; and it is highly efficient at breaking windows, quickly breaking glass of varying thicknesses.

The present invention provides a polypolypeptide gene vector and a preparation method and application thereof, wherein the polypolypeptide gene vector comprises nanospheres formed by self-assembly of triblock polypolypeptides, wherein the triblock polypolypeptides comprise polyethylene glycol, polylysine and polyleucine connected in sequence; one end of the polylysine is connected to the polyethylene glycol via an amide bond, and the other end of the polylysine is connected to the polyleucine via a peptide bond. The polypolypeptide gene vector of the present invention can efficiently load the target gene in the polypolypeptide gene vector, and can form stable gene particles with high encapsulation rate and high load; the obtained polypolypeptide gene vector can produce a protonated sponge effect inside the lysosome to promote the lysosomal escape of the target gene and prevent the target gene from being degraded in the lysosome. It has important application prospects in the fields of gene editing, gene diagnosis, gene therapy and gene vaccines.