131results about How to "Not prone to collapse" patented technology

The invention relates to a solid phase extraction column based on graphene bonded silica gel, which is used in concentration and separation of organic pollutants in an environmental water sample. A graphene bonded silica gel padding is prepared by taking 3-aminopropyl triethoxy silane (APTES) as the cross-linking agent; then graphene is bonded on the surface of silica gel; after product graphene bonded silica gel granules are evenly filled in a solid phase extraction column, the graphene bonded silica gel based solid phase extraction column is obtained. The performance indicators of the solid phase extraction column are tested through polycyclic aromatic hydrocarbons, including naphthalene, acenaphthylene, fluorene, phenanthrene, fluoranthene and pyrene, and the test result shows that the solid phase extraction column has good extraction efficiency, reproducibility and stability. The graphene bonded silica gel has the characteristics of big specific surface area, strong Pi electron adsorption ability and high extraction capacity of the graphene, and the stable mechanical property and good adsorption ability of the silica gel. Moreover, the solid phase extraction column based on the graphene bonded silica gel is low in preparation cost and simple to operate and is suitable to be used for pretreatment of low-concentration organic pollutants in a big-volume water sample. The solid phase extraction column has a good application prospect in the concentration and separation of environmental organic pollutants.

The invention relates to a method for manufacturing a microstructure fiber. The method comprises the following steps: A, selecting a quartz or crystal fiber rod with the diameter of between 10 and 20mm; B, setting processing conditions corresponding to a laser, and punching the selected quartz or crystal fiber rod in the radial direction; and C, drawing wires under a high-temperature condition of between 1,800 and 2,000 DEG C to manufacture the microstructure fiber. The method has the advantages of reducing manufacture processes, reducing manufacturing cost, and improving the stability of achievements. The advantages of the method are reflected in that: (1) materials of preform rods have a wider selection range, and can be doped materials or undoped materials; (2) the fiber is not formed by accumulation, so collapse is avoided during wire drawing; (3) the fiber is molded once without accumulation-wire drawing repeatedly; (4) the method has simple process and stable shape, and can be manufactured in batch; and (5) end surfaces of a finished product can be hexagonal shapes, honeycomb shapes, can also be regular circles, squares and the like, so that the type characteristics of the fiber can be changed correspondingly.

The invention discloses a bifocus laser and InFocus arc hybrid welding method, and relates to a welding method. The method includes the steps that (1) a to-be-welded workpiece is polished or washed; (2) the spot diameter is set to range from 0.1 mm to 0.5 mm, and the defocusing amount ranges from -3 mm to +3 mm; (3) welding parameters are set, wherein the arc current ranges from 50 A to 900 A, an included angle formed between a welding gun and the vertical direction ranges from 25 degrees to 55 degrees, the welding speed ranges from 100 mm / min to 1000 mm / min, the wire feeding speed ranges from 100 mm / min to 600 mm / min, the protection gas is inert gas, and the flow of the protection gas ranges from 15 L / min to 30 L / min; and (4) a switch is started, and laser-InFocus arc welding is carried out. According to bifocus lasers and InFocus, as the InFocus arc fusion depth is larger, and a key hole can be formed through welding, when a medium-thickness plate is welded, the lasers can directly act on the bottom of the key hole generated by the InFocus arc, and the fusion depth is continuously increased.

The invention relates to biological ink for 3D printing of artificial skin, and belongs to the technical field of tissue engineering. The biological ink comprises a component A used for constructing an epidermal layer, a component B used for constructing a corium layer and a component C used for constructing an acellular matrix scaffold, wherein the component A comprises first seed cells, first carrier hydrogel and first growth factor slow-release gel containing traditional Chinese medicine components, and the mass ratio of the first carrier hydrogel to the first growth factor slow-release gelis (60: 1)-(60: 8); and the component B comprises second seed cells, second carrier hydrogel and second growth factor slow-release gel. The traditional Chinese medicine components such as dragon's blood and ampelopsis japonica and growth factor slow-release gel are added, and seed cells are extracted from the skin of a patient. The biological ink has good biocompatibility, can effectively promotecell proliferation and regeneration and wound healing, has good mechanical and fluidic properties, and can be used in 3D printing skin and other related fields.

The invention discloses a spinning punch forming method for a refrigerator door panel. The punch forming method comprises the steps of forming a circular arc face by spinning and forming side edges. Specifically, the punch forming method comprises the following steps of: gradually extruding the redundant materials on the lateral surface of the circular arc face to flow to the lateral lower part by spinning motion of a spinning forming die so as to complete the formation of the circular arc face, and then completing the formation of the side edges. By optimizing the process, defects such as impression, pressing damage, hollowness, bulge, corner collapse, scrape and the like are not easily caused on the appearance of the refrigerator door panel.

The invention discloses a thermal deformation technique of flange with abnormal section comprising the following steps: heating and upsetting a billet; punching a through hole at centre of one face of the upset billet by a small diameter solid punch; putting a positioning mould on the through hole and pressing the positioning mould by a press; taking out the positioning mould, punching the through hole into a stepped hole by a large diameter solid punch; heating the billet with stepped hole and putting on a ring rolling mill for ring rolling processing. The ring rolling mill is provided with a king roller and a core roller provided with a core mould section. The ring rolling mill rolls the billet into a flange with abnormal section by the king roller, the core roller and the core mould section on the core roller. The technique can process a circular component into a flange with abnormal section by simple technical steps in one single step, not only reducing workload of machine processing, but also saving large amount of raw materials.

The invention relates to a method for preparing open-cell foam titanium. The method includes 1) selecting high-purity titanium powder and needle-like urea to be mixed in a grinded body evenly to obtain initial mixture, wherein average grain diameter of the needle-like urea is 225-420 micrometers; 2) forming a cylindrical raw compact by the initial mixture; 3) performing two steps of hot processing on the raw compact, firstly, preheating the raw compact in a carbon tube furnace in a rough vacuum state of 10-1Pa to 10-2Pa, blowing out and cooling when heating temperature reaches above 460 DEG C, secondly, sintering the raw compact for 2 hours under a high-purity argon protective atmosphere at the temperature of 1250 DEG C, and finally, cooling the raw compact in the furnace to the room temperature to obtain the foam titanium. Two heating processes enable collapse not easy to occur during melting of the urea, and the titanium powder is not easy to carry away by melted urea liquid, so that output rate of the foam titanium is greatly increased when content of the urea serving as a pore forming agent is larger than 60% (volume fraction); in addition, two-time heating rate and temperature rate are properly selected to enable the urea to fully volatilize, and the titanium powder is free of contamination.

The invention provides a rapid assembly type protection device based on building construction, belongs to the technical field of building construction, and aims at solving the problems that when an existing protection shed is assembled, connection needs to be conducted through a large number of bolts, so that time and labor are wasted when the protection shed is assembled, disassembly is troublesome, and the practicability of the protection shed is reduced. The rapid assembly type protection device comprises eight supporting columns, and each supporting column is connected to a concrete base through four fastening clamp nuts; when the protection shed is assembled, reinforcements are clamped between the two front and rear adjacent supporting columns, then limiting mechanisms slide into theupper sliding rails and the lower sliding rails, so that the limiting mechanisms are effectively limited, then a protective top plate is clamped into the upper ends of the supporting columns, the assembly operation of the protective shed is completed, and the large number of bolts are not needed for connection in the whole assembling process, so that time and labor are saved when the protection shed is assembled, and then the practicability of the protective shed is improved.

The invention provides a battery separator film, wherein film materials comprise a polyethylene mixture and polymethylpentene. The polyethylene mixture comprises ultrahigh-molecular-weight polyethylene and high-density polyethylene. The invention also provides a preparation method of the battery separator film. According to the invention, air permeability of the separator film provided by the invention is substantially improved, pore-closing temperature is substantially reduced, piercing strength is substantially increased, and film rupture temperature is substantially increased. Therefore, a safer protection performance is provided for batteries. The film and the method are more suitable to be applied in power batteries.

The invention discloses a soil body reinforcement device for pipe jacking construction in a sand soil foundation. The reinforcement device comprises a water injection pool, a water injection pump, a primary water injection guide pipe, water injection through pipes, secondary water injection guide pipes, water injection wells, water pumping wells, secondary water pumping and water collecting guide pipes, water pumping and water collecting through pipes, a primary water pumping and water collecting guide pipe, a water pumping pump and a water storage pool, wherein the water injection wells and the water pumping wells are positioned in the sand soil foundation; microorganism consolidation fluid is contained in the water injection pool; a water outlet of the water injection pool is connected with a water inlet of the water injection pump through a pipeline; a water outlet of the water injection pump is connected with a water inlet of each water injection well through a water injection pipeline assembly; a water outlet of each water pumping well is connected with a water inlet of the water pumping pump through a water pumping pipeline assembly; and a water outlet of the water pumping pump is connected with a water inlet of the water storage pool through a pipeline. A reinforcement method has the advantages that the strength stability of the sand soil foundation can be effectively improved; the operation is convenient; the influence on surrounding environment is small; the efficiency is high; and the reinforcement treatment cost of the sand soil foundation can be greatly reduced.

A forming method of a conductive plug includes: providing a semiconductor substrate which is provided with transistors and a medium area covering the transistors, wherein each transistor comprises a source drain area and a grid area; forming a hard mask layer on the medium layer; forming openings corresponding drain source areas in the hard mask layer; using the residual hard mask as a mask to etch the medium layer along the openings until the source drain area contact holes of the source drain areas are exposed; allowing the source drain area contact holes to be filled with conductive materials. The forming method has the advantages that the hard mask layer is high in etching resistance and small in thickness, the contact holes formed by using the hard mask layer as the mask are good in morphology, and the finally formed conductive plug is high in yield.

The invention discloses a drill bit capable of enabling a well wall to be ceramic. The drill bit comprises a connector, a drill bit body, a wall construction device, drill bit cutting teeth and a combustor, wherein the lower end of the connector is connected with the drill bit body, the wall construction device is installed on the drill bit body, the drill bit cutting teeth are arranged at the lower end of the drill bit body, a central pipeline and a combustion gun are arranged in the connector, the combustion gun is arranged at the lower end of the central pipeline, a flame nozzle is arranged at the lower end of the combustion gun, the combustor is arranged inside the drill bit body, a high temperature gas nozzle is arranged at the lower end of the drill bit body, the two ends of the combustor are communicated with the flame nozzle and the high temperature gas nozzle respectively, and an outer annular pipeline is arranged in the connector and is communicated with an air inlet of the combustion gun. The drill bit can achieve rock breaking through combination of combustion heat energy and mechanical energy, and improve the rock breaking efficiency remarkably. In addition, the well wall is made to be ceramic by the utilization of the combustion heat energy, the smooth and hard well wall is formed, even a lower casing pipe is not needed for well cementation, and the drilling cost is remarkably saved.

The invention discloses a flood control box for a water conservancy project, and particularly relates to the technical field of water conservancy projects. The flood control box comprises a box body,four clamping holes are formed in the top of the box body, the four clamping holes are formed in the four corners of the top of the box body, a first rubber pad layer is fixedly arranged on the bottomwall of the box body, supporting feet are connected to the bottom of the box body, threads are arranged on the top ends of the supporting feet, the top ends of the supporting feet are inserted into the box body, the supporting feet are detachably connected with the box body through threads, a clamping groove is formed in one side of the box body, a second rubber pad layer is arranged on the otherside of the box body, and clamping blocks are arranged on the second rubber pad layer. Seal of transverse and longitudinal connection of the flood control box can be reinforced at the same time, theclamping blocks and the clamping grooves are matched, the supporting feet and the clamping holes are matched, the gap of the connection between box bodies can be small, matching is fastened, the floodcontrol box is not prone to sweeping down, a built flood control dike is not prone to collapsing, and safety is improved.

The invention discloses a circular divided blasting tunnel construction method. According to the method, a circular divided blasting manner that the periphery (an upper step portion, a side wall portion and an arch bottom portion) is blasted firstly, and then, a circular middle portion (a central rock stratum portion) is blasted is creatively adopted in the method. According to the method, the blasting safety distance from a surface building is lengthened, the maximum single-segment explosive payload is reduced, and the disturbance to a surrounding rock and the surface building is reduced; and meanwhile the method reduces a rock mass area of blasting each time, shortens work time of each divided portion and is beneficial to stability of a preliminarily-supported structure. Although the number of divided portions is increased, a work surface is increased at the same time, and it can be ensured that devices like a small-type excavator can enter a tunnel face to carry out operation. All the divided portions can be constructed synchronously, the work efficiency is improved, and the construction progress is quickened.

The invention provides a hard-edge independent bagged spring mattress comprising a fireproof cover, and a bagged mattress core, sponges and white cotton felts which are all placed in the fireproof cover, wherein the sponges are flatly laid and bonded respectively on the upper outer surface and the lower outer surface of the bagged mattress core, to form a double-clipped sponge layer. At the same time, the white cotton felts are flatly laid and bonded respectively on the upper outer surface and the lower outer surface of the double-clipped sponge layer; the top surface and the bottom surface of the bagged mattress core are fixed by flat hard-edge frames. The bagged mattress core is fixed by the flat hard-edge frames, so that the overall strength can be increased, even if a condition of larger edge local pressure load occurs, the bagged mattress core is not easy to deform or even collapse, and the overall quality is greatly improved.

The invention relates to the field of industrial bricks, and discloses a checker brick with plum blossom holes for an air heating furnace. The checker brick is provided with through holes which are equidistantly arranged and shaped like plum blossoms; each plum blossom-shaped through hole is formed by head-to-tail connection of six 120-degree circular arcs of the same size; the periphery of the checker brick is provided with a 120-degree circular arc hole and a semi plum blossom-shaped hole which is formed by sequentially connecting three 120-degree circular arcs; the upper end face of the checker brick is provided with grooves; and the lower end face of the checker brick is correspondingly provided with projections. The checker brick with plum blossom holes for the air heating furnace has large heating surface, good stability, large hot air flow, and good up and down air flowing effect, is not easy to block, solves the long-time problems of intensity smelting and low blast temperature, and improves the furnace temperature of a blast furnace.

The invention belongs to the technical field of micro-nano machining, and particularly relates to a metal micro / nano wire array and a preparation method thereof. The metal micro / nano wire array comprises a supporting layer metal sheet and metal micro / nano wires erected on the metal sheet. The metal micro / nano wire array has a large depth-to-width ratio, and the diameter and height of the metal micro / nano wire and the thickness of the metal sheet can be accurately controlled; The metal micro / nano wires are directly erected on the metal sheets and are not crossed and overlapped with one another,so that the specific surface area and the repeated utilization rate are increased; The metal micro / nano-wire array can be applied to preparation of a flexible nano device with a large depth-to-widthratio. According to the preparation method, a material with relatively good rigidity and etching stability is used as a substrate, so that the problems of collapse and the like in an etching process can be avoided, and a micro / nano wire array with a high depth-to-width ratio is obtained; In addition, according to the method, the height of the micro / nano wire can be accurately controlled by controlling the etching time.

A dust depositing chamber system for depositing the dust contained in high-temp fume and burning the residual volatile components and carbon powder is composed of a fume inlet furnace chamber, a fume outlet furnace chamber, and a communication hole between said furnace chambers. It features that their internal surface is composed of a refractory layer and an insulating layer and said communication hole has a sleeve pipe made of steel.

A provided preparation method for a normal-temperature solid dairy product comprises: preparing fermented milk; cooling the fermented milk to 2-6 DEG C, and standing for 4-20 h, so as to obtain aged fermented milk; stirring and aerating the aged fermented milk, and controlling the stirring aeration expansion ratio to be 30%-70%, so as to obtain aerated fermented milk; shaping the aerated fermented milk, then putting in an environment with the temperature of -80 DEG C to -65 DEG C and refrigerating for 1.5-3 h, so as to obtain refrigerated fermented milk; and drying the refrigerated fermented milk to have a water content of 2%-5%, so as to obtain the normal-temperature solid dairy product. The invention also provided the normal-temperature solid dairy product prepared according to the above method, and the normal-temperature solid dairy product generates crisp unique mouthfeel when being instantly eaten, and can be stored at normal temperature.

The invention discloses a gas-assisted injection molding process for an automobile interior trim. The gas-assisted injection molding process comprises injection molding pressure maintaining, product air passage formation by high-pressure air blowing, pressure maintaining for high-pressure gases in an air passage and pressure maintaining for normal-pressure gases in the air passage; during injection molding pressure maintaining, a die at one side of a product appearance surface is internally provided with a plurality of heating pipes at equal intervals along the axis of the air passage of a product, the axes of the heating pipes are arranged along the normal direction of the product appearance surface, and the distance from the end surface of each of the heating pipes to the product appearance surface is 20-25mm; and before rubber injection molding, the preheating temperature of each of the heating pipes is 1 / 2 of a rubber melting temperature, and the preheating temperature of the die is 30-35 DEG C. By using the injection molding process, the defect that whity bright marks are generated on a surface corresponding to the position of the air passage can be eliminated.

The invention provides application of 3D printing in cross-linked polyimide, preparation of porous polyimide and preparation of a polyimide composite material, and belongs to the technical field of 3D printing and intelligent manufacturing. The direct writing 3D printing technology is applied to the cross-linked polyimide, and the cross-linked porous polyimide which is good in heat resistance, excellent in size stability, rich in pores and controllable in pore diameter can be simply prepared. the technology is used for preparing the polyimide composite material, the prepared polyimide composite material has the characteristics of excellent thermal performance, good dimensional stability and complex shape, the process is simple, and the polyimide composite material with diversified shapes can be prepared.

The invention relates to a novel spring mattress. The novel spring mattress comprises spring areas and an edge reinforcing layer, wherein the spring areas comprise a first spring area, a second spring area, a third spring area, a fourth area and a fifth spring area; springs adopted by the first spring area, the third spring area and the fifth spring area are soft springs; springs adopted by the second spring area and the fourth spring area are hard springs; the springs in the spring areas are arranged in a honeycomb shape; the edge reinforcing layer is arranged at the periphery of the spring areas and comprises a plurality of rows of hard springs; and the springs in the spring areas are of double-spring structures. The novel spring mattress has the advantages that the spring distribution conforms to the human skeleton mechanics, the spring arrangement is dense, the elasticity is good, the service life is long and the benefit for health of the human skeleton is achieved.

The invention discloses a machining method for stepped ring grooves of a supercharger sliding bearing. The machining efficiency is higher, and the machining cost is lower. The machining method for thestepped ring grooves of the supercharger sliding bearing comprises the following steps that S1, the supercharger sliding bearing is prepared, the four stepped ring grooves which are evenly arranged in the circumferential direction are to be machined in the supercharger sliding bearing, and the stepped ring grooves are integrally in a fan shape and comprise the upper-layer ring grooves and the lower-layer ring grooves communicating with the outer sides of the upper-layer ring grooves; S2, holes are drilled in the circle centers, to be subjected to fillet machining, of the two ends of each stepped ring groove, and the finish machining allowance of subsequent fillets is reserved; S3, a sinking table is milled at the drilling position of one end of each stepped ring groove to serve as a cutting point of a milling cutter used for subsequent rough machining; and S4, the milling cutters are adopted for conducting rough machining and finish machining on the upper-layer ring grooves and the lower-layer ring grooves correspondingly.

The invention discloses a sterile soft package isolator which comprises an outer frame support. An air feeding and discharging box and a transparent PVC (polyvinyl chloride) flexible film isolation package, an operating glove and a delivery bin are arranged on the transparent PVC flexible film isolation package and connected with the air feeding and discharging box through an air feeding pipe andan air discharging pipe, pipeline-type efficient filters and manual adjusting valves are arranged on pipe bodies of the air feeding pipe and the air discharging pipe, the air feeding and discharging box comprises an air feeding primary filter, an air feeding fan, an air feeding efficient filter, a concentrated air feeding chamber, a concentrated air discharging chamber, an air discharging fan, anexternal air discharging connector, an all-network wireless communication module, a measurement sensor, an integrated control module, a UPS (uninterrupted power supply) and the like. The sterile softpackage isolator is conveniently and rapidly assembled and disassembled, various operations of the workers are facilitated, pollution risks are low, collapse cannot easily generated, manufacturing andtransporting cost is low, the sterile soft package isolator has intelligent control and remote control functions, and healthy living environments can be created for sterile animals.

The invention discloses a telescopic bridge of a high-altitude operation vehicle. The structure of the telescopic bridge comprises a cross beam, a sleeve block, a vertical rod, a hydraulic rod, a control box, a mounting and fixing device, an extension beam, a fixed connection rod, a connection plate, a lifting hook, a movable clamping groove, a pushing oil cylinder and a fulcrum block, wherein theleft side of the cross beam is vertically welded with the vertical rod; the extension beam is arranged under the cross beam and is parallel to the cross beam; the left side of the extension beam is connected with the vertical rod; the sleeve block is arranged on the left side of the lower part of the cross beam; the hydraulic rod is nested in the sleeve block through clearance fit; the control box is mounted on the vertical rod through interference fit; the mounting and fixing device is arranged under the vertical rod; two ends of the fixed connection rod are respectively connected with the connection plate and the movable clamping groove; the connection plate is mounted on the right side of the extension beam through clearance fit; the lifting hook is vertically connected with the rightside of the extension beam; the movable clamping groove is nested on the right side of the cross beam through clearance fit. The fixation of the telescopic bridge can be improved in use, so that the situation of collapse of the telescopic bridge is not easily caused; the telescopic bridge has high safety in use.

The invention relates to a cosmetic packaging blister film and a forming production line thereof. The cosmetic packaging blister film comprises a blister film body, wherein a plurality of accommodating cavities are formed in the blister film body, first positioning clamping grooves are formed among the plurality of accommodating cavities, the first positioning clamping grooves are of a downward concave shape, annular clamping grooves are formed in edges of the blister film body, and second positioning clamping grooves are formed in the annular clamping grooves; and a feeding device further comprises a stacking device, the stacking device comprises a first fixing frame, an abutting and moving assembly and a bearing assembly, wherein the abutting and moving assembly and the bearing assemblyare arranged on the first fixing frame, and the abutting and moving assembly is internally provided with a first limiting groove and a second limiting groove which are in clamping connection with theblister film body. The cosmetic packaging blister film and the forming production line thereof have the effects that the blister film can be stably driven to be stacked and accurately clamped, the stacked blister film can be driven to be conveyed and moved, the phenomenon that collapse and scattering cannot occur in the moving process is avoided, and the production efficiency can be improved.

The invention relates to an electric arc furnace. The electric arc furnace is provided with a furnace body, a furnace cover and electrodes. The furnace cover covers an opening part of the furnace body. The electrodes stretch into the furnace body from the furnace cover. A feeding port is formed in one side of the furnace body, and a slag outlet and a discharging port are formed in the other side of the furnace body. The furnace cover comprises a supporting frame and a fireproof cover. The supporting frame comprises a bottom ring, a top cover and a connecting beam. The bottom ring surrounds the outer portion of the top cover. The bottom ring and the top cover are connected together through the connecting beam. The fireproof cover is fixedly arranged between the bottom ring and the top cover, and a gap between the bottom ring and the top cover is fully filled. The top cover is provided with electrode holes for the electrodes to penetrate. The electric arc furnace is good in melting effect, stable in structure and low in manufacturing cost.

The invention relates to a semiconductor encapsulating method which comprises the following steps: preparing a substrate, wherein the substrate is divided into a plurality of encapsulating regions, and each encapsulating region is provided with a plurality of electronic components in an electric connection mode; preparing a bare printed circuit board, wherein the bare printed circuit board is provided with a holding hole which penetrates through the upper and lower surfaces of the bare printed circuit board; pasting the bare printed circuit board onto the substrate, so that the bare printed circuit board encloses the encapsulating regions and the electronic components are held in the holding hole; and injecting a colloid into the holding hole of the bare printed circuit board to coat the electronic components. Thus, the semiconductor can be manufactured according to flexible designs, and can be suitable for small-scale production.

The invention relates to a liver model and a preparation method and application thereof. The preparation method of the liver model comprises the following steps that the liver is decellularized, and the decellularized liver is obtained; the decellularized liver is reinforced with a cross-linking agent, and the liver model is obtained. The preparation method of the liver model is short in time, theblood vascular system distribution and the mechanical property of the liver model prepared by using the method are close to real liver cells, the three-dimensional structure of a blood vascular system in the liver is reserved, the overall liver model is transparent, and the blood vessels in the liver model are clearly visible; the embolization process, the distribution of an embolic agent and theembolization effect can be directly observed without a digital subtraction angiography instrument or other devices, and the storage time is long.