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168results about How to "Prevent collapse" patented technology

Mechanical and jet flow combined exploitation method and mechanical and jet flow combined exploitation device for natural gas hydrates in non-stratified rock of shallow strata in seabed

ActiveCN107448176AAvoid blendingPrevent collapseConstructionsFluid removalSpray nozzleMechanical crushing
The invention discloses a mechanical and jet flow combined exploitation method and a mechanical and jet flow combined exploitation device for natural gas hydrates in non-stratified rock of shallow strata in seabed. The mechanical and jet flow combined exploitation method and the mechanical and jet flow combined exploitation device are used for crushing and exploiting the natural gas hydrates in the non-stratified rock of the shallow strata in the seabed in a composition manner. The mechanical and jet flow combined exploitation method includes drilling pilot holes by an intelligent guide drilling tool, unfolding a mechanical crushing cutter arm after the intelligent guide drilling tool reaches preset locations, carrying out rotary cutting and crushing, starting to carry out jet flow crushing by spray nozzles, opening a flow regulating device, isolating recovery regions from goaves, separating hydrates from sediment by a downhole separator, filling the sediment with CO2, realizing effects of curing backfilled particles and backfilling the sediment in an in-situ manner. The mechanical and jet flow combined exploitation method and the mechanical and jet flow combined exploitation device have the advantages that the crushing radiuses and the exploitation spaces can be enlarged; crushed particles and the backfilled particles can be prevented from being mixed with one another; the sediment which is sorted by the downhole separator is filled with the CO2, accordingly, natural gas in the sediment can be displaced, effects of curing agents can be realized, the strength of backfilled layers can be enhanced, and the goaves can be prevented from collapsing.
Owner:SOUTHWEST PETROLEUM UNIV

Automatic palletizing system of double-mainline double-output pallet warehouse

ActiveCN103112683APrevent collapseImprove palletizing qualityPackagingStacking articlesEngineeringPallet
The invention discloses an automatic palletizing system of a double-mainline double-output pallet warehouse. The automatic palletizing system comprises a two conveying lines, a palletizing robot and two first chain conveying lines, each conveying line is provided with a vibrating conveyor and an intermediate leveling device, each vibrating conveyor comprises a first support, a first motor and a conveying roller, each first motor is in transmission connection with the corresponding conveying roller, and the transverse section of each conveying roller is of a polygon structure. Each intermediate leveling device comprises a second support, a first lead screw and a first leveling roller, shaft seats capable of sliding up and down are arranged on two sides of each second support, first rotating shafts of the first leveling rollers are arranged in the shaft seats, the first lead screws are connected on the second supports in a threaded manner, and one end of each first lead screw is connected with the corresponding shaft seat. Each vibrating conveyor is positioned between one conveying line and the palletizing robot, the second supports are fixed on the first supports, the first leveling rollers are positioned above the conveying rollers, and the first chain conveying lines are correspondingly positioned on one sides of the conveying lines. Palletizing quality is improved through the vibrating conveyors and the intermediate leveling device.
Owner:青岛诺力达智能科技有限公司

Heat treatment deformation control method for large-diameter and large-modulus elliptical molded surface container semispherical shell

The invention relates to a heat treatment deformation control method for a large-diameter and large-modulus elliptical molded surface container semispherical shell and belongs to the technical field of container manufacturing. By means of the heat treatment deformation method, due to the fact that an integrated quenching and aging heat treatment tool is designed, the elliptical molded surface container semispherical shell and the heat treatment tool can be tightly matched, the quenching transfer time is shortened, the phenomenon that the top of the shell collapses and pits happen in the circumferential direction of the shell during quenching is avoided, quenching and time aging deformation is reduced, and therefore the heat treatment performance of the elliptical molded surface container semispherical shell can be ensured; and meanwhile, the subsequent machining precision of the shell is also ensured. In addition, a UCON water solution with the concentration ranging from 6% to 10% is adopted in the method to serve as a quenching medium, dynamic flowing of the water solution is maintained, the cooling speed and uniformity of the shell are ensured, meanwhile, quenching deformation is also controlled, and therefore the product precision is ensured.
Owner:AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1

Energy-saving vegetable planting greenhouse

The invention discloses an energy-saving vegetable planting greenhouse and relates to the technical field of planting greenhouses. The greenhouse comprises a greenhouse body of a cuboid structure and a greenhouse ceiling on the top of the greenhouse body. An access opening is formed in the side wall of the greenhouse body in the width direction, a pressure sensor is arranged on the top of the inner wall of the greenhouse ceiling, and at least four heating mechanisms are symmetrically arranged at the bottom of the inner wall of the greenhouse ceiling in the length direction. Each heating mechanism comprises a heating pipe and an air blower, wherein the heating pipe is located above the air blower. Driving devices are arranged on the outer wall of the greenhouse ceiling, PLCs are arranged on the outer wall of the greenhouse ceiling, and the driving devices and the pressure sensors are electrically connected with the PLC controllers. The pressure sensors are arranged on the greenhouse ceiling and matched with the heating mechanisms, accumulated snow can be melted in time under the coordination of the PLCs, the situation that the greenhouse ceiling bears excessive high pressure and collapses is prevented, the greenhouse ceiling is protected, and accordingly the service life of the greenhouse is prolonged.
Owner:杨寨

Steel-concrete composite tunnel lining supporting structure and manufacturing and construction method thereof

The invention discloses a steel-concrete composite tunnel lining supporting structure and a manufacturing and construction method thereof. The supporting structure is formed by splicing unit plate pieces with radian in the circumferential direction and axial direction of a tunnel wall. Each unit plate piece is provided with a pair of arc edges and a pair of straight edges. The inner wall of each unit plate piece is provided with protruding ribs at intervals in the straight edge direction. The radian of the protruding ribs is consistent with that of the arc edges, and cavity pillars are formed between the protruding ribs and the unit plate pieces. The surfaces of the protruding ribs are provided with concrete pouring holes, and unit plate pieces corresponding to the protruding ribs are provided with concrete overflowing holes. Meanwhile, the arc edges are inwards bent to form end face flanges, and the straight edges are provided with side edge flanges. The steel-concrete composite tunnel lining supporting structure has the advantages that the supporting structure can bear pressure load of the upper portion of a tunnel and the surrounding rock immediately, and the newly dug tunnel can be supported rapidly and timely and is prevented from collapsing; the supporting structure can be used for the primary lining as well as integrating the primary lining and the secondary lining and an also be used for repairing, reinforcing and the like of crippled tunnels.
Owner:NANJING LIANZHONG CONSTR ENG TECH

Waterproof, anti-corrosion and breathable expanded polytetrafluoroethylene material modified film for packaging bottle cap and preparation method thereof

The invention relates to a waterproof, anticorrosive and air-permeable expanded polytetrafluoroethylene (e-PTFE) material modified membrane for packing a bottle cap and a preparation method thereof. The e-PTFE material modified membrane comprises an e-PTFE microporous membrane layer for enhancing oil repellence capability and a modification processing layer which are connected together. The e-PTFE material modified membrane has the beneficial effects that pressure balance is realized, rupture, collapse and leakage of a container are prevented, the requirements for water resistance, dust prevention, oil resistance, ventilation, oxidation resistance and acid-base solution corrosion resistance are met, the strength of the material is enhanced and the good welding compactness between the e-PTFE material modified membrane and a plastic product is realized, thus being applicable to developing waterproof and air-permeable stoppers for various packing plastic bottle caps; by virtue of unique press-fitting design, the waterproof and air-permeable stoppers for the packing plastic bottle caps can be manually and automatically installed; and package can be improved without redesign in the case of a series of air-permeable products and ready-to-use components with different sizes.
Owner:PAN ASIAN MICROVENT TECH JIANGSU CORP

Cartilage-bone-marrow composite tissue structure based on 3D living cell printing and method of cartilage-bone-marrow composite tissue structure

The invention discloses a cartilage-bone-marrow composite tissue structure based on 3D living cell printing and a method of the cartilage-bone-marrow composite tissue structure. Biological informationof bone tissue is collected and input into a computer for biomimetic modeling, and bio-ink suitable for cells such as cartilage, osteogenesis, mesenchymal stem, vascular endothelium, etc., is prepared; hard materials for printing dense bone area are prepared; various casting agent is prepared; living cells are inoculated into corresponding bio-ink at a certain density; and various types of printing ink are loaded into a printer bin correspondingly, 3D printing is carried out after setting printing parameters, and printed bone tissue is cultured in a tissue engineering bionic incubator. Aftera certain time, the method of temperature control or enzyme control or light control is used to remove casting agent materials at different times, artificial blood vessels are grafted on the outside of the cartilage-bone-marrow composite tissue, and continuous circulation perfusion cultivation is carried out in the tissue engineering biomimetic incubator, so as to achieve the pre-maturation of printed tissue, and the long-term survival and biological function of 3D printing bone tissue can be realized.
Owner:THE FIRST AFFILIATED HOSPITAL OF ARMY MEDICAL UNIV

Preparation method for highly acid Y type molecular sieve

ActiveCN106853973APrevent collapseAvoid damage to micropore channelsFaujasite aluminosilicate zeoliteMolecular sieveAqueous solution
The invention provides a preparation method for a highly acid Y type molecular sieve. The method comprises the following steps a, mixing a silicon source, an aluminum source, an alkali source and water and then carrying out ageing at a predetermined temperature so as to obtain a Y type molecular sieve guiding agent; b, mixing the Y type molecular sieve guiding agent, the silicon source and water at room temperature under stirring, then adding the aluminum source and the alkali source under stirring, carrying out crystallization at 90 to 110 DEG C for 12 to 48 h, and successively carrying out cooling, washing, pumping filtration and drying at 30 to 80 DEG C so as to obtain a NaY type molecular sieve; and c, treating the NaY type molecular sieve in an aqueous solution of an ammonium salt, then treating the NaY type molecular sieve in an acid solution, carrying out treatment in a solution containing cetyl trimethyl ammonium bromide, ammonia water and LaCl3 and then roasting the NaY type molecular sieve at 400 to 600 DEG C for 1 to 10 h so as to obtain the Y type molecular sieve. The preparation method provided by the invention is simple in process and low in cost, and prevents collapse of the crystal lattice of the molecular sieve and destroy of microporous channels while preparing the highly acid Y type molecular sieve with a high degree of crystallization.
Owner:PETROCHINA CO LTD +1

Method for realizing photoresist microstructure

The invention discloses a method for realizing a photoresist microstructure. The method comprises the following steps: preparing a netlike negative photoresist microstructure on the surface of a substrate; stripping the netlike negative photoresist microstructure from the substrate and spreading the netlike negative photoresist microstructure on a solid positive photoresist substrate, wherein the solid positive photoresist substrate is arranged on a conductive substrate; embedding the netlike negative photoresist microstructure into the surface layer of the solid positive photoresist substrate by a hot pressing method, and meanwhile adhering the solid positive photoresist substrate to the conductive substrate; and exposing and developing the solid positive photoresist substrate with the netlike negative photoresist microstructure embedded in the surface layer and being adhered to the conductive substrate on a prearranged mask to obtain the photoresist microstructure. By using the method, a layer of netlike negative photoresist microstructure is hot-pressed on the surface of the positive photoresist substrate, so that each easily inclined and collapsed part in the photoresist microstructure obtained after exposure and development of substrate is connected by the netlike negative photoresist microstructure on the surface to form a whole body, so that the inclination and the collapse of each part can be effectively prevented.
Owner:INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI

Rotary drilling type sand-pumping hole-forming side wall high-pressure grouting device and construction method

ActiveCN113174943APrevent collapseLimit bloatExcavationsBulkheads/pilesPressure groutingGrout
The invention provides a rotary drilling type sand-pumping hole-forming side wall high-pressure grouting device and a construction method. The rotary drilling type sand-pumping hole-forming side wall high-pressure grouting device is characterized in that an inner protection cylinder is sleeved with a floral tube in a wrapping mode, a steel protection cylinder is fixedly arranged on the portion, located on the lower portion, of the outer portion of the inner protection cylinder in a sleeving mode by a certain length, an annular cavity is formed between the inner protection cylinder and the floral tube, a grout storage layer is formed, an opening in the top end of the grout storage layer is blocked by a pressing sheet, the grout storage layer communicates with a grouting machine for grouting, a rotary type drawing disc is arranged in the bottom end of the inner protection cylinder in a spliced mode, a chain bucket device is arranged in the inner protection cylinder, and a plurality of evenly-distributed digging buckets used for digging sand are arranged on the chain bucket device. According to the rotary drilling type sand-pumping hole-forming side wall high-pressure grouting device, high-pressure grouting is conducted on the side wall of a pile hole while suction type drilling is conducted, and the foundation structure condition is improved through the technology in which the pile periphery is solidified through pressure grouting of the side wall of the pile hole.
Owner:CHINA THREE GORGES UNIV

Method for preventing progressive collapse of high and large formwork support

The invention discloses a method for preventing progressive collapse of a high and large formwork support. The method comprises the following steps of: 1) modeling the high and large formwork support; 2) applying simulated loads to a model of the high and large formwork support; 3) calculating instability coefficients I corresponding to defects of the high and large formwork support; 4) adding auxiliary measures and recalculating instability coefficients II; and 5) comparing the instability coefficients I with the instability coefficients II. According to the method, the stress characteristics of a formwork support system during a construction period can be analyzed by modeling, and after calculation, the overall stress and the progressive collapse resistance of the formwork support are analyzed, and then improved technical measures on design and construction of the formwork support are provided. After the auxiliary measures are applied, the instability coefficients in the presence of the defects are recalculated, and then whether the auxiliary measures are effective or not is judged by comparing the instability coefficients in the presence of the defects with the instability coefficients when the auxiliary measures are not applied, so that the application of the auxiliary measures is guided, and the high and large formwork support is prevented from collapsing.
Owner:CHONGQING UNIV
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