10results about How to "Fill the void" patented technology

The invention discloses a high-performance concrete material adapted to an assembled pavement and a preparation method thereof, and the concrete per unit volume is prepared from the following components in parts by weight: 100-220 parts of cement, 200-440 parts of fly ash, 10-30 parts of silica fume, 20-60 parts of glass beads, 10-30 parts of rubber powder, 100-200 parts of fine aggregate, 7-16 parts of a water reducing agent, 8-15 parts of a thickening agent and 0-6 parts of PVA fiber. And 1-8 parts of magnesium chloride hexahydrate, wherein the water cement ratio is 0.2-0.4. And carbonizing and curing the fiber reinforced concrete slurry to obtain the high-performance concrete material. The fiber reinforced concrete is subjected to carbonization curing to generate natural aragonite fibers, the toughness of the concrete is improved, and concrete with different aragonite contents can be prepared by adjusting the content of the magnesium chloride hexahydrate reagent, so that different toughness is achieved. According to the present invention, the fabricated pavement with characteristics of small thickness, toughness and strength meeting mechanical requirements of different working conditions during transportation, hoisting and service can be prepared, green maintenance and rapid maintenance can be achieved, and rapid development and large-scale application of the fabricated pavement can be promoted.

The invention discloses a preparation method of a diamond / aluminum composite material for reducing a thermal expansion coefficient by using a negative expansion material. Relates to a preparation method of a diamond / aluminum composite material. In order to reduce the thermal expansion coefficient of the diamond / aluminum composite material, the thermal matching between the diamond / aluminum composite material and a semiconductor is improved. The material with the negative expansion coefficient is introduced on the basis of the diamond / aluminum composite material to serve as a reinforcement body, the thermal expansion coefficient of the prepared diamond / aluminum composite material is adjustable, the requirements for the thermal expansion coefficient under different service conditions can be met through component design, and then the thermal expansion coefficient of the composite material is adjusted and controlled. The thermal expansion coefficient of the prepared diamond / aluminum composite material is closer to that of semiconductor devices such as Si and GaN, and the requirement of an electronic packaging thermal management material for thermal expansion coefficient matching is better met.

The invention discloses a polymer modified asphalt composition and a preparation method thereof, and relates to the technical field of asphalt materials. The invention has the advantages that the performance of the asphalt composition is improved through composite modification of multiple components, the surface activity of nano silicon dioxide is enhanced after pretreatment, the gaps between asphalt molecules are filled, the structural stability and wear resistance are improved, and the nano silicon dioxide is tightly combined with the asphalt molecules due to its nano size, the plant polymerizable components extracted from flax seeds are subjected to a series of treatments, and the active groups thereof react with the asphalt molecules to improve the flexibility and adhesion, the ionic liquid is synthesized and pretreated, and the anions and cations act on the active sites of the asphalt molecules to improve the anti-aging performance, the thermosensitive polymer is composed of a copolymer containing specific chain segments, the low-temperature shrinkage makes the molecular structure compact and crack-resistant, and the high-temperature stretching adapts to the volume expansion and remains stable, effectively improving the high-temperature stability and low-temperature crack resistance, and extending the service life of the paved material.

The utility model relates to the technical field of elevator construction protection, and discloses a detachable elevator protection turning plate for shaft construction, which comprises a main body component and a lift car top cover, a turning plate is arranged on the lift car top cover, a hinge is movably connected onto the turning plate, the turning plate is in bolt connection with the hinge, a handle is arranged on the turning plate, and the handle is connected with the lift car top cover. A rubber pad is fixed on the turnover plate; a dovetail groove is formed in the lift car top cover, and a bolt is arranged in the dovetail groove; the hinge is connected with the turnover plate through three bolts; and the hinge is connected with the turnover plate through three bolts. The detachable protection turning plate has the advantages that the detachable protection turning plate is designed, the gap between the lift car and the well wall is effectively filled, the angle of the turning plate can be properly adjusted to adapt to the gaps with different widths, and therefore the situation that objects and people fall from high altitudes is avoided, and safety of operators is guaranteed.

The invention discloses a preparation method and application of a high-strength light building material, and relates to the technical field of building materials. The method comprises the following steps: S1, carrying out deacidification treatment on phosphogypsum to remove soluble impurities and organic matter impurities; s2, processing the machine-made sand until the particle size is 1-2mm, processing the dolomite powder until the particle size is 0.5-1mm, processing the glass beads until the particle size is 0.1-0.2 mm, and processing the phosphogypsum until the particle size is 0.01-0.05 mm; s3, mechanically and uniformly mixing the cement, the machine-made sand, the dolomite powder, the glass beads, the phosphogypsum and the red mud to obtain a mixture; s4, putting the rest raw materials into a reaction kettle, mixing and uniformly stirring, heating the reaction kettle to 80-90 DEG C, putting the mixture into the reaction kettle, carrying out heat preservation and stirring until water is dried, discharging, and cooling to normal temperature, so as to obtain a raw material; s5, the raw materials are put into a mold for hot press molding, and a finished product material is prepared. The machine-made sand, the dolomite powder, the polyvinyl alcohol fiber, the glass fiber, the carbon fiber and the ardealite are combined, so that the strength of the material is improved.

The utility model discloses a steel mesh structure for improving the welding effect of parallel devices, which comprises a plurality of parallel opening parts, each parallel opening part comprises two pairs of steel mesh openings arranged at intervals, each parallel opening part corresponds to a bonding pad on a circuit board, and the device specification corresponding to each pair of steel mesh openings is smaller than the device specification corresponding to the bonding pad. Each bonding pad comprises two welding spots, and the two steel mesh openings in each pair are located on the two welding spots of one bonding pad respectively. According to the utility model, by controlling the size and position of the opening of the steel mesh, the accurate positioning and stable mounting of the device in the welding process are ensured, two small-specification devices are accurately placed on a large-specification bonding pad, and the four steel mesh openings corresponding to the two devices are mutually independent, so that the welding efficiency is improved. According to the invention, large tension or traction force is not generated in the welding furnace passing process of the devices, collision and interference between the devices are prevented, parallel welding of the devices is realized, the original bonding pad design does not need to be changed, and the cost loss of remanufacturing a board caused by the design problem is avoided.

The present invention relates to a fuel cell stack assembly structure, comprising an upper end plate, an upper insulating plate, an upper current collecting plate, a core module, a lower current collecting plate, a lower insulating plate and a lower end plate stacked in sequence, wherein the side of the core module is provided with a vertically arranged columnar elastic molded body, the elastic molded body is formed by plastic casting, the top end of the elastic molded body is connected to the upper current collecting plate, and the bottom end of the elastic molded body is connected to the lower current collecting plate. Compared with the prior art, the present invention has the advantages of high safety, convenient operation and installation, etc.

The utility model relates to the technical field of electronic connecting wires, in particular to an anti-breaking electronic connecting wire, which comprises a plurality of wire bodies, one end of each wire body is mounted on a wiring port, the surface of the wiring port is provided with a wiring groove, a rubber plug is inserted into the wiring groove and sleeved on the wire body, and the rubber plug is inserted into the wiring groove. One end of the rubber plug block is fixed on the surface of the connecting sheet, the connecting sheet is mounted on one side of the wiring port, a silica gel extension block is fixed on the surface of the connecting sheet, and the silica gel extension block sleeves the wire body; the beneficial effects are that the rubber plug block is plugged in the wiring groove, and the rubber plug block is sleeved on the wire body. When the rubber plug block is plugged into the wiring groove, a gap between the wire body and the wiring groove can be tightly filled, and the wire body is stably fixed in the wiring groove, so that the wire body is prevented from swinging randomly for a long time in the wiring groove, and the phenomenon that the wire body is damaged due to bending in the wiring groove is effectively prevented.

The application provides a carbon-carbon composite material defect repairing liquid, a preparation method thereof and a defect repairing method of a carbon-carbon composite material component, and the carbon-carbon composite material defect repairing liquid comprises the following components in percentage by mass: 0.05%-0.2% of a silane coupling agent, 5%-14% of an organic solvent, 10%-25% of graphite powder, 60%-80% of phenolic resin and 0.5%-2% of polyvinylpyrrolidone, wherein the mesh number of the graphite powder is 200-1000, the solid content of the phenolic resin is 80wt%-85wt%, and the residual carbon content of the phenolic resin is 60wt%-75wt%. The carbon-carbon composite material defect repairing liquid has a good defect repairing effect on the carbon-carbon composite material component, and has the advantages of simple operation, short cycle and low cost.

The invention relates to the technical field of metallurgical processing, in particular to a preparation method of a long-service-life doped tungsten bar. The problem that an existing tungsten bar is short in service life is solved. The preparation method comprises the following steps: adding a doping material and a composite surfactant into blue tungsten oxide, uniformly mixing, adding a combined binder after hydrogen reduction, carrying out layered pressing in a layered filling and multi-point filling manner to obtain a green body, and carrying out high-temperature sintering and acid pickling in stages; and coating aluminum oxide on the surface of the pickled semi-finished product by taking trimethylaluminum and oxygen as raw materials to obtain the long-service-life doped tungsten bar. The density and high-temperature oxidation resistance of the doped tungsten bar are improved by changing the adding amount of blue tungsten oxide, the component proportion of the doping material and the adding amount of the doping material, the combined binder and the composite surfactant and adjusting the pressure of each time of pressing, the temperature and time of different stages of high-temperature sintering and the deposition temperature and time during aluminum oxide coating; and the effect of prolonging the service life of the doped tungsten bar is achieved.