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123results about How to "Improves strength and stability" patented technology

Hoisting system and hoisting construction method for large steel corridor trusses

The invention discloses a hoisting system and a hoisting construction method for large steel corridor trusses. The hoisting system comprises lifting points, hanging points and jack lifting equipment. The jack lifting equipment is mounted between the lifting points and the hanging points, the lifting points comprise first lifting frames and second lifting frames, the first lifting frames are connected with first main structures, the second lifting frames are connected with second main structures, four embedded steel beams which have equal heights and are parallelly arranged are arranged in the two lifting frames of each lifting point, the lifting points are arranged at the ends of the embedded steel beams, two box-shaped brackets are respectively welded on two sides of each beam body of each lifting point, a jack is mounted on each box-shaped bracket, and each torsion-resistant steel beam is welded between the two corresponding box-shaped brackets on the inner sides of the beam bodies of the corresponding lifting points; the four corresponding hanging points which vertically correspond to the lifting points on a frame are arranged on each steel corridor truss, and steel strands penetrate the box-shaped brackets from top to bottom and are fixed by the aid of anchors after descending and penetrating the hanging points. Each large steel corridor truss can be synchronously lifted by the aid of the four corresponding hanging points during construction. The hoisting system and the hoisting construction method have the advantages that the hoisting system is reasonable in design and easy to operate, and problems of large occupied land areas, heavy dead weights and poor balance in existing large steel corridor truss hoisting procedures can be effectively solved by the aid of the hoisting system and the hoisting construction method.
Owner:CHINA RAILWAY BEIJING ENG GRP CO LTD +1

Stelmor line cooling method of high-speed wire by taking temperature as direct-control parameter

The invention discloses a Stelmor line cooling method of a high-speed wire by taking temperature as a direct-control parameter, comprising the steps of: respectively arranging seven infrared thermo detectors at the first to sixth sections and a gathering coil of the Stelmor line and additionally arranging an environment temperature and humidity meter; additionally arranging a computer, an interface, a data collector, a cable and the like to realize integrally reasonable installation; establishing an assorted software system and forming a standard cooling curve and an actual cooling curve of the wire on the Stelmor line; establishing a Stelmor optimal cooling curve prediction model and a Stelmor line fan air volume set prediction model by using neural network technology; deriving the air volume set value of each fan; and eliminating the difference between the actual cooling curve and the standard cooling curve. By means of the invention, a Stelmor dynamic closed loop type cooling control system is established, the bad influences on the intensity caused by the chemical components and the fluctuation of the environment temperature are eliminated, the structure properties of various wire products can be optimized and the accurate control of the structure properties of the wire products is realized.
Owner:BAOSHAN IRON & STEEL CO LTD

Processing mechanism and processing method of main body component of bicycle

The invention provides a processing mechanism and a processing method of a main body component of a bicycle. The processing mechanism is characterized in that a water needle for injecting water into a cavity is arranged at a main cavity channel of the cavity of a mold, wherein the front part of the water needle is inserted into the cavity, and a material overflowing cavity for containing overflowed materials is communicated with the other end, opposite to the direction of the water needle, of the main cavity channel through an overflowing pipe; a closeable glue feeding member for injecting glue materials is further arranged at the side wall of the main cavity channel. According to the processing mechanism and the processing method, a water-assisted molding process is introduced into an injection molding process, the two processes are organically combined, and high pressure water is utilized for driving the redundant glue materials in a product out of the cavity, so that the component product is very rapid to cool, and pressure maintaining and cooling processes in the normal injection molding process can be omitted; furthermore, the product can be molded at a time, so that the efficiency is greatly improved, meanwhile, the strength is guaranteed, the wall thickness of the component is very uniform, the shape precision is greatly improved as well, the shapes of bicycle components such as bicycle frames having more braches are diversely designed, and the weights of the bicycle components are light.
Owner:TIANJIN SILVER BASSIS TECH CO LTD

Prefabricated green building system and construction method thereof

The invention relates to a prefabricated green building system and a construction method thereof, and belongs to the technical field of building construction industrialization. The prefabricated greenbuilding system includes a bottom plate, the bottom plate includes a plurality of first splicing strips spliced to each other, a first slot and a first inserting strip which are matched with each other are arranged on the opposite faces of every two adjacent first splicing strips, the cross section of each first slot is in a T shape, and each first inserting strip is arranged to be matched with the corresponding T-shaped first slot. The two ends of each of the multiple first splicing strips are provided with first covering strips for covering the two ends of each of the multiple first splicing strips, the cross section of each first covering strip is in a U shape, as the first slots and the first inserting strips are in the T shapes, the multiple first splicing strips are located on the same plane, and the fixing effect of the adjacent first splicing strips is improved. The ends of the multiple first splicing strips are covered with the first covering strips, deviations between the heights of the multiple first splicing strips along stand columns are prevented, and the strength and stability of the prefabricated building system are improved.
Owner:成都市新宏建筑工程有限公司

Cement-based material carbon sequestration internal curing agent as well as preparation and application thereof

ActiveCN112876119AWell-developed pore structureTo achieve the effect of internal maintenanceSolid waste managementSuper absorbentSorptivity
The invention discloses a cement-based material carbon sequestration internal curing agent as well as preparation and application thereof. The internal curing agent is modified biochar or a compound of the modified biochar and light aggregate and/or super absorbent resin; and the modified biochar is biochar powdery particles obtained by soaking biochar obtained by pyrolyzing biomass under high-temperature and oxygen-limited conditions in an alkaline solution, drying and grinding. The rich pore structure and the strong hydrophilic performance of the biochar enable the biochar to achieve the internal curing effect of the cement-based material, and the good stability can ensure the long-term and stable development of the performance of the cement-based material; the biochar is sealed in the cement-based material, so that the release of CO2 can be reduced, and the effects of carbon sequestration and emission reduction are achieved; and the biochar modified by the aqueous alkali can make the cement more fully hydrated, and when the biochar is matched with the lightweight aggregate and/or the super absorbent resin for use, the internal curing effect is stronger. After the internal curing agent provided by the invention is doped, the compressive strength and bending strength of the cement-based material at the age of 28 days are improved, and the self-constriction is effectively reduced.
Owner:HUALAN DESIGN GRP CO LTD

Foam concrete preparation system and foam concrete preparation method

The invention discloses a foam concrete preparation system, which comprises a cement slurry stirring device, a cement slurry delivery device, a high-pressure air delivery device and a foam concrete generating device; a slurry inlet and an air inlet are formed in one end of the foam concrete generating device; a finished product delivery outlet is formed in the other end of the foam concrete generating device; the cement slurry stirring device communicates with the slurry inlet of the foam concrete generating device through a cement slurry delivery pipeline; and the outlet of the high-pressure air delivery device communicates with the foam concrete generating device. The invention also provides a foam concrete preparation method. The foam concrete preparation system and the foam concrete preparation method disclosed by the invention have the beneficial effects: after being mixed with a foaming agent, the cement slurry is mixed with high-pressure air to prepare foam concrete; cells in the foam concrete are evenly distributed; difference between sizes of the cells is not big; difference between density levels is relatively small; water cement ratio is stable; and the problem that a large amount of foam is generated due to the fact that a cement slurry body is mechanically mixed with foam in a traditional method is avoided.
Owner:THE FIRST SINCERITY CONSTR TECH CO LTD

Multi-head branch-control 3D printer

The invention discloses a multi-head branch-control 3D printer. Longitudinal guide rails are two guide rails symmetrically distributed along the middle positions of transverse guide rails. Each longitudinal guide rail is symmetrically provided with two printing head mounting sliding blocks, wherein a 3D printing head is mounted on each printing head mounting sliding block. The four 3D printing heads on the two longitudinal guide rails complete printing in four areas of a printing platform. Every time printing of one layer is completed, the printing platform is driven by a power mechanism to rotate by 3.6 degrees, and therefore the printing areas corresponding to the four printing heads are stacked at the joint of the two adjacent printing areas of the lower layer. The four printing heads of the multi-head branch-control 3D printer work at the same time and do not generate interference to one another, and the printing efficiency is greatly improved; and the printing platform is arranged to be rotatable, and therefore after printing work of one layer is completed every time, the printing platform rotates by a certain angle, the printing area of each printing head is changed, staggered stacking between the different printing layers is formed, and the strength and stability of printed products are improved.
Owner:LUOYANG INST OF SCI & TECH
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