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 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 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 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.

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.