11results about How to "Reduce rebound rate" patented technology

The invention discloses a damaged carton recycling device and method for carton packaging, and relates to the technical field of waste recycling, the damaged carton recycling device comprises a shell, two door bodies rotationally installed on the shell, a control module fixedly installed outside the shell and a data display module, the compaction assembly is mounted in the shell; the hydraulic rod is fixedly mounted at the top of the shell; and the compaction assembly comprises a bottom plate fixedly mounted at the bottom of the shell and an extrusion plate slidably mounted in the shell, a connecting sleeve is fixedly mounted on the extrusion plate, and the driving end of the hydraulic rod is fixedly connected with the connecting sleeve. The carton compacting device has the advantages that in the carton compacting process, through pressure equalizing and buffering of the pressure buffering assembly, negative pressure air exhaust gap discharging and resistance reducing, lateral protection restraining deformation and repeated tamping successive exhaust plastic deformation, the interlayer fitting degree and uniformity of paperboards can be synergistically improved, and the higher compression ratio and the lower rebound rate are achieved.

The invention belongs to the technical field of concrete, and particularly relates to basalt fiber composite modified sprayed concrete and a preparation method thereof. The basalt fiber composite modified sprayed concrete is prepared from the following raw materials in parts by weight: 420 to 470 parts of cement, 200 to 220 parts of water, 830 to 860 parts of sand, 840 to 880 parts of gravel, 40 to 60 parts of admixture, 15 to 30 parts of modified basalt fiber, 2 to 6 parts of polycarboxylate superplasticizer and 5 to 12 parts of alkali-free accelerator. The modified basalt fiber is added into the sprayed concrete to serve as a reinforcing phase, the strength and impact toughness of the concrete can be improved, and the later strength of the concrete is guaranteed. The cerium trifluoride modified fly ash is added into the admixture, so that the rebound rate can be reduced, and the early strength of the concrete is improved.

The application discloses a shotcrete rebound-reducing agent and a preparation method thereof. The shotcrete rebound-reducing agent is prepared from the following raw materials in mass percentage: 15-30% of a quick-setting component, 2-5% of a viscosity-increasing component, 10-15% of a reinforcing component, 2-5% of an anti-freezing component, 1-4% of a stabilizer, and the rest of water; and the viscosity-increasing component is a combination of polyvinylpyrrolidone and modified carboxymethyl cellulose. The prepared shotcrete rebound-reducing agent has the advantages of good sprayability, high hourly strength, good anti-freezing and stability, and the like, can improve the working performance of shotcrete, reduce the content of a quick-setting agent and significantly reduce the rebound rate of shotcrete, and has good economic benefits.

This invention discloses a low-carbon, high-density shotcrete admixture, its preparation method, and its application, relating to the field of concrete admixtures in building materials. The admixture comprises the following components by mass percentage: 53-73% rheological component, 15-25% thickening component, 10-18% early-strength component, and 0.5-4% setting regulator component. The rheological component includes manganese slag powder and silica fume, and the thickening component is tailings powder loaded with nano-modified cellulose ether. This invention increases the cohesiveness of shotcrete and improves the slurry encapsulation of concrete through the thickening component, increases the yield stress of concrete through the rheological component, and synergistically improves the adhesion and rapid hardening performance of the material after spraying by combining with the early-strength component, thereby reducing the rebound rate. Furthermore, the nanoparticles loaded on organic matter hydrate in the pores, directionally filling harmful pores, effectively improving the density and strength of shotcrete, achieving low-carbon, low-rebound, and high-density shotcrete.

The application belongs to the technical field of battery pole piece production, and particularly relates to a battery pole piece automatic rolling equipment and a use method thereof. In view of the problem that the distance between upper and lower rollers of an existing rolling pair roller machine is not easy to adjust, thereby limiting the use range of the lithium battery pole piece rolling pair roller machine, the following scheme is provided. The scheme comprises a U-shaped base, a first adjusting extrusion roller and a first fixed extrusion roller, the first adjusting extrusion roller and the first fixed extrusion roller are arranged in the U-shaped base to roll the battery pole piece, a second adjusting extrusion roller and a second fixed extrusion roller, the second adjusting extrusion roller and the second fixed extrusion roller are arranged on the other side in the U-shaped base to roll the battery pole piece for the second time to prevent rebound, and two groups of lifting mechanisms, which ensure the thickness consistency of the battery pole piece and prevent rebound.

The invention provides a secondary battery and a preparation method thereof, a negative pole piece and an electric device, the secondary battery comprises the negative pole piece, the negative pole piece comprises a negative current collector and a negative film layer arranged on at least one side of the negative current collector, the negative film layer comprises a negative active material, and the negative active material comprises a carbon material; at least part of the surface of the carbon material is coated with fibers, and the rebound rate of the negative pole piece is 20-40%.

The invention relates to sprayed concrete and a preparation method thereof, and relates to the technical field of concrete.The sprayed concrete is prepared from, by weight, 365-410 parts of cement, 790-830 parts of fine aggregate, 710-760 parts of coarse aggregate, 70-100 parts of fly ash, 75-95 parts of modified yellow phosphorus slag, 12-16 parts of accelerator, 4.5-7 parts of water reducer, 3-6.5 parts of natural plant admixture and 155-175 parts of water; the natural plant additive is prepared from beet root tubers and gelidium amansii in a weight ratio of (1-2): (5-9). On the basis of an existing shotcrete batching system, the natural plant admixture and the modified yellow phosphorus slag are introduced, all the components have a synergistic effect, the construction requirements for the initial strength and the later strength of the shotcrete are met, the rebound rate of the shotcrete is remarkably reduced, and the shotcrete has a good application prospect. The method can be widely applied to construction of various supporting projects such as tunnels and roadways.

The application relates to the field of degradable composite material processing technology, and discloses a rebound-preventing groove-pressing shaping device for degradable composite materials, which comprises a rebound-preventing mechanism and a base. The rebound-preventing groove-pressing shaping device for degradable composite materials is provided with two-stage elastic buffering formed by a first spring and a second spring in a shell. When the groove-pressing mechanism is pressed down, the first spring provides initial reverse supporting force first, and the second spring gradually increases the supporting force in cooperation with the telescopic rod with the increase of the pressing depth. The variable-rigidity support can accurately match the rebound stress of the degradable composite material at different deformation stages, reduces the rebound rate, and the damping columns on the two sides of the baffle cooperate with the sliding of the sliding blocks in the sliding grooves to absorb the vibration energy in the pressing process, avoid local stress concentration of the material due to vibration, improve the groove-pressing quality, and the concave groove cooperates with the convex block of the groove-pressing mechanism to form a forming space. The round corners of the bottom sharp tips can reduce the material flow resistance and prevent the material from being scratched during pressing.

The application discloses a nano-enhanced quick-setting viscosity increasing agent and application thereof in concrete. The quick-setting viscosity increasing agent comprises an aluminum salt quick-setting component, surface modified nano-silica, an ion triggered viscosity increasing polymer, an organic acid stabilizing component and water. The quick-setting viscosity increasing agent can be stably dispersed under acidic storage conditions, and after being contacted with a cement-based material, a viscosity increasing network is formed under an alkaline environment and the action of Ca2+, so that quick setting and viscosity increasing are synergized. The surface modified nano-silica has good dispersion stability and nucleation promoting effect, and the ion triggered viscosity increasing polymer can quickly improve the cohesiveness of a paste and the structure establishment speed. The prepared quick-setting viscosity increasing agent has the advantages of good storage stability, fast setting speed, strong wall hanging property, low rebound rate and good strength maintenance, and can be applied to sprayed concrete, sprayed mortar, quick repair mortar and facade printing cement-based materials.

The present application provides a kind of oilfield sewage biological treatment process based on microbial technology, it is characterized in that, including the following steps: the oilfield sewage containing partial hydrolyzed polyacrylamide is sent into multiple alternately arranged acid-producing bacteria pool and acid-consuming bacteria pool in turn, sewage is alternately flowed between the acid-producing bacteria pool and the acid-consuming bacteria pool, the PH value of sewage is oscillated in above-mentioned range, and each oscillation period is 3-5 hours;The treated sewage enters aerobic biological treatment tank, and the aerobic biological treatment tank is added with compounded microbial inoculum, and the compounded microbial inoculum is composed of pseudomonas, bacillus subtilis and acinetobacter with mass ratio 3:2:1.The oilfield sewage biological treatment process based on microbial technology has the advantages that after physical method pretreatment, additional chemical treatment method is not needed, and the treatment effect of polyacrylamide-containing sewage can be greatly improved.

This invention provides a catalyst for shotcrete and its preparation method, belonging to the field of concrete admixtures. The shotcrete catalyst, by weight percentage, comprises the following components: 10-12% water-reducing agent, 0.3-0.5% modified viscosity modifier, 1-5% ion chelating agent, 6-8% modified setting aid, 0.1-0.2% air-entraining agent, and the balance being water. The preparation method of the catalyst includes the following steps: adding the modified viscosity modifier to water, stirring evenly, and then sequentially adding the water-reducing agent, ion chelating agent, modified setting aid, and air-entraining agent, stirring to obtain the product. This invention, through the synergistic effect of the modified viscosity modifier and modified setting aid, obtains a catalyst specifically for C25 shotcrete. In application, it not only reduces the cement content of concrete, meeting the standard strength of C25 shotcrete at 28 days, but also reduces the dosage of accelerators, lowers the rebound rate, and is less prone to pipe clogging.