9results about How to "Precise construction" patented technology

The application discloses a kind of carbon black supported iron manganese composite oxide cluster catalyst's Joule heat preparation method and its application in electrocatalytic nitrate reduction preparation ammonia, belong to electrocatalytic ammonia preparation technical field.The catalyst Ketjenblack EC-600JD carbon black is used as carbon carrier, iron manganese composite oxide cluster is uniformly dispersed on the surface of carbon carrier, and the carbon carrier is worm-like mesoporous structure, with high specific surface area and high defect concentration.The application uses sodium citrate as complexing agent, acetylacetone iron and manganese acetate as metal precursor, after complexing, loading, gelation, freeze drying, the target catalyst is prepared by Joule heat instantaneous heat treatment under nitrogen atmosphere;The preparation process has high heat conversion efficiency, low energy consumption, can realize atomic dispersion of iron manganese composite oxide cluster, effectively improves the exposure degree of catalytic active site.The catalyst shows high catalytic activity, high selectivity and excellent stability in electrocatalytic nitrate reduction preparation ammonia reaction, and the ammonia preparation faraday efficiency can reach more than 85%, and the preparation process does not need noble metal and toxic reagent, and the process is green and efficient, easy to scale production, can efficiently convert nitrate wastewater into ammonia, with environmental governance and nitrogen resource recycling value.

The utility model provides a guiding and positioning device for a pile foundation reinforcement cage, and belongs to the technical field of bridge construction. The problem that in the construction process of an existing pile foundation reinforcement cage, the reinforcement cage is difficult to position and install is solved. The device comprises a square frame and a guiding round steel cylinder, the guiding round steel cylinder is arranged in the square frame, four connecting plates are horizontally arranged on the edge of the top of the guiding round steel cylinder at equal intervals in the circumferential direction, and one end of each connecting plate is connected with the edge of the top of the guiding round steel cylinder; the four connecting plates are in lap joint with the tops of the four edges of the square frame correspondingly, reinforcement cage fixing steel pipes are horizontally arranged at the four corners of the top of the square frame correspondingly, and the reinforcement cage fixing steel pipes stretch out and draw back towards the center direction of the square frame. The device is mainly used for bridge pile foundation reinforcement cage construction.

The application belongs to the technical field of biological detection, and particularly relates to an electrochemical nanosensor for detecting intracellular lactic acid in tumor cells and a preparation method and application thereof. A carbon fiber nanoelectrode (CFNE) with a tip diameter of about 150 nm is prepared by using a flame etching technique, and platinum nanoparticles (Pt NPs) are modified on the surface of the carbon fiber nanoelectrode to enhance the electrocatalytic activity of the electrode. Lactate dehydrogenase (LDH) is covalently cross-linked and fixed by using polyethyleneimine to construct an enzyme nanoelectrode (LDH / Pt / CFNE) for electrochemical detection of intracellular lactic acid in single cells. The sensing electrode has the characteristics of high sensitivity, good selectivity and excellent stability, realizes real-time and in-situ quantitative detection of intracellular lactic acid in single tumor cells, and is applied to tumor metabolism research, drug evaluation and mouse tumor model verification.

The application discloses an arc-shaped inclined concrete structure wall construction structure and a construction rechecking method, and relates to the construction field. The construction structure comprises a bottom plate for limiting a wall, a top plate, a stand, a wall inner wood mold and a wall outer wood mold, an arc-shaped measuring tool, a wall steel reinforcement cage, a screw rod, a reinforcing keel and an external support frame. The cross sections of the bottom plate and the top plate are both circular, and the sizes of the circles are different. The construction rechecking method comprises the following steps: bottom plate pouring; stand and top plate pouring; support frame erection; wall outer wood mold rechecking; wall inner wood mold rechecking; arc-shaped inclined concrete structure wall pouring; removing the wall inner wood mold and the wall outer wood mold; and rechecking the arc-shaped inclined concrete structure wall to determine whether the chord height of the wall is consistent with the theoretical chord height. According to the counting scheme, the wall wood mold can be measured twice before wall pouring, the construction accuracy of the wall is greatly improved, and the wall itself can be measured after wall pouring to check whether the wall construction is accurate.

This invention discloses an automated slab insertion system and method for recently reclaimed land foundations. The system includes an air-floating platform and an insertion mechanism. The insertion mechanism is slidably mounted on the air-floating platform, allowing it to move along a path formed by the platform to different positions on the shallow surface of the recently reclaimed land. The air-floating platform is used to fix the surface of the recently reclaimed land using negative pressure adsorption. The insertion mechanism is used to insert drainage boards into the soil layer of the recently reclaimed land. The air-floating platform includes at least one air chamber and at least two air cells, each independently separated and arranged along the horizontal direction of the platform. The air cells are located below the air-floating platform. When the air-floating platform is placed on the surface of the recently reclaimed land, the surface of the land is sealed within the air cells. This invention enables rapid construction of recently reclaimed land sites, improving construction efficiency compared to traditional methods.

This invention relates to a staggered covalent organic framework thin film, its preparation method, and its application, belonging to the field of thin film technology. The invention first dissolves an amine monomer in acetic acid solution to obtain an aqueous solution; then dissolves an aldehyde monomer in mesitylene to obtain an organic solution; finally, the aqueous and organic solutions are added to the aqueous and organic phase chambers of a diffusion cell, respectively, for interfacial polymerization. After the reaction, the membrane material is removed, washed, and dried to obtain the staggered covalent organic framework thin film. This film forms a staggered stacked structure and constructs sub-nanometer transport channels with pore sizes of approximately 0.5 nm to 0.7 nm. Through a synergistic mechanism of Donnan repulsion and hydrogen bonding interactions, it maintains structural stability under extreme environments of high acidity, strong corrosion, and high radiation, achieving highly efficient selective permeation of protons and efficient retention of metal ions in high-level radioactive waste liquids.

This invention relates to the field of prestressed hollow core slab design. Currently, the process design for hollow core slab systems is unclear. This invention proposes a BIM-based prestressed hollow core slab design method, comprising: establishing a BIM model of the framework; providing a prestressed hollow core slab BIM database to the designer; determining the design load values ​​for the spans, the thickness of the prestressed hollow core slabs, and the initial layout direction; determining the slab direction layout and reinforcement for each span; determining the final simply supported layout diagram of the prestressed hollow core slabs and ensuring the accuracy of the layout; determining the locations of water and electricity pipes for the hollow core slabs and the locations of openings below the slab holes; outputting overall project information data reports; generating production processing tables for each production line; outputting the production processing tables to the factory for standardized assembly line production; generating QR codes through input into the production management system; and on-site construction and installation. This method improves production efficiency, achieves seamless integration from design to production and construction, and enables precise construction, demonstrating promising development prospects in the field of prestressed hollow core slab design.

This invention discloses a rapid construction method for underground engineering on islands and reefs, comprising the following steps: S1, collecting blasting construction data and inverting to obtain a rock mass spectral attenuation model; S2, using the rock mass spectral attenuation model obtained in step S1 as a physical constraint for energy propagation, constructing an energy functional with spectral attenuation as the weight, and solving for the charge energy density distribution that precisely matches the heterogeneous absorption characteristics of the rock mass, thereby determining the charge parameters for each blast hole during blasting construction; S3, calculating the theoretical predicted spectrum at each monitoring point, collecting the measured spectrum data after blasting construction, comparing the theoretical predicted spectrum with the measured spectrum data, and updating the rock mass spectral attenuation model based on the comparison results. This invention utilizes the spectral attenuation characteristics of the rock mass to directly drive blasting energy design and achieves dynamic closed-loop adjustment through spectral feedback; this method is adapted to the geological characteristics of porous reef limestone, thereby achieving rapid and precise construction of underground spaces in reef limestone.

The utility model discloses an inspection well anti-sedimentation well lid lifting construction device which comprises a supporting seat, a top plate is installed on the supporting seat, a downward telescopic air cylinder is installed on the top plate, a piston rod of the telescopic air cylinder penetrates through the top plate and then is provided with a connecting plate, four connecting feet are arranged on the bottom face of the connecting plate, and wire fixing parts are arranged on the bottom faces of the connecting feet. Wires are arranged between the opposite wire fixing parts, and the two groups of wires are crossed to form a cross shape; the four positioning plates synchronously guide and position the connecting plates and the connecting feet, cross-shaped horizontal calibration is carried out through cross-shaped lines, and lifting construction of the well lid is facilitated. The height position of the line can be accurately set through the scales, and accurate construction is facilitated; the four positioning screw rods are respectively screwed by screwing the screwing parts, so that the bottom ends of the positioning screw rods just abut against the crossed lines, and therefore, the lines cannot shake up and down under external wind or extrusion during construction, and the precision is high.