359results about How to "Prevent subsidence" patented technology

A long-distance pipe-jacking tunnel construction method based on three-dimensional stability analysis comprises the following steps: constructing a three-dimensional numerical model based on geological exploration data; performing high-precision discretization processing to form an infinitesimal triangular mesh; assigning physical and mechanical parameters to the soil body in the model; deducing a pipe-jacking tunnel excavation face supporting force calculation formula by applying a limit analysis upper limit theorem; developing an integrated calculation program, and performing comparative analysis with measured data; the accuracy of a calculation program is verified through actual measurement data, the jacking force is dynamically optimized by integrating construction parameters, and the influence of additional stress of the upper structure on construction stability is evaluated; the three-dimensional stability analysis model is optimized and updated, and accurate control over the construction process is achieved; and according to the optimization model and a data analysis result, a construction scheme is adjusted in real time to adapt to stratum change and construction deviation. Compared with a traditional method, the stability analysis precision of pipe-jacking tunnel construction is improved, the construction scheme is optimized, and the method has remarkable engineering application value and popularization prospects.

The invention relates to the technical field of dispersing agents for ceramics, and discloses a preparation method of a dispersing agent for ceramics, and the novel dispersing agent for ceramics is prepared by taking methoxypolyethylene glycol, bromoacetyl bromide, 4-hydroxyphthalic anhydride, 2, 4, 6-diethanolamine amino-1, 3, 5-s-triazine and the like as raw materials. The polyether polyol contains a plurality of carboxyl groups, has strong interaction with the surface of ceramic powder such as aluminum oxide, has a star-shaped multi-arm polyether molecular chain, can well coat the aluminum oxide powder, can effectively inhibit the growth of crystal nucleus particle size of the aluminum oxide powder, reduces the particle size of the aluminum oxide, and avoids agglomeration and sedimentation of the aluminum oxide; the modified aluminum oxide ceramic powder has good activation degree in solvents such as water, ethanol, dichloromethane or N, N-dimethylformamide and the like, is lower in settling volume and shows excellent dispersing performance.

The invention discloses a low-thermal-conductivity and high-temperature-resistant silicon oxide aerogel heat insulation felt and a preparation method thereof, and the prepared silicon oxide aerogel felt has the characteristics of temperature resistance of 1100 DEG C, good flexibility, excellent high-temperature heat insulation performance and convenience in construction, and has wide application prospects in the fields of aerospace, industrial kilns and the like.

The invention discloses an antiviral water-based paint for an interior wall and a preparation method thereof, and belongs to the technical field of water-based paints. The antiviral water paint is used for solving the technical problem that in the prior art, the antiviral performance, the antibacterial performance and the moisture resistance of an antiviral coating need to be further improved. Comprising the following components in parts by weight: 90 to 105 parts of antibacterial and antiviral emulsion, 1.0 to 1.3 parts of dispersing agent, 0.5 to 0.8 part of wetting agent, 0.6 to 1.0 part of defoaming agent, 1.2 to 1.5 parts of thickening agent and 20 to 25 parts of activated filler. The antibacterial agent, modified zinc oxide and the acrylic monomer are prepared into the antibacterial and antiviral emulsion in a free radical polymerization mode in the polysiloxane silicon emulsion containing the multi-element olefin, and the antibacterial and antiviral emulsion is matched with the activated filler, so that the storage stability of the water-based paint is effectively improved, and the service life of the water-based paint is prolonged. And the moisture resistance, scrubbing resistance, long-acting antibacterial property and antiviral property of a water-based paint film are also improved.

The present invention relates to the technical field of cutting fluids. The present invention discloses a device for preparing aluminum alloy cutting fluids and cutting fluids prepared by the device. The preparation device comprises a preparation tank, a multi-stage stirring component, a speed change mechanism, a linkage adjustment mechanism, and a homogenization channel. The multi-stage stirring component comprises a power source, a power shaft, a bottom stirring paddle, a middle stirring paddle, and an upper stirring paddle; and the homogenization channel is distributed inside the bottom stirring paddle. The cutting fluid comprises at least the following components in parts by weight: 19-26wt% of vegetable oil, 3-6wt% of lubricant, 2-5wt% of rust inhibitor, 1-2wt% of coupling agent, 7-11wt% of emulsifier, 11-15wt% of PH buffer, 0.5-1wt% of defoamer, 1-1.5wt% of corrosion inhibitor, 1-2wt% of antibacterial agent, and the balance is deionized water. The present application solves the problem of uneven mixing and dispersion in the existing aluminum alloy cutting fluid preparation process, and solves the problem of insufficient stability of the emulsifier in the aluminum alloy cutting fluid preparation process, easy stratification and demulsification, and affecting the cooling and lubrication effect.

The invention relates to the technical field of scale inhibitors, and particularly discloses a preparation method of a corrosion and scale inhibitor, which comprises the following steps: dissolving modified polyaspartic acid in hydrogenated diesel oil, adding an antioxidant, and uniformly mixing to obtain a solution A; dissolving hydrolytic polymaleic anhydride in hydrogenated diesel oil to obtain a solution B; the preparation method comprises the following steps: uniformly mixing an imidazoline oleoyl polyamine corrosion inhibitor and 2-amino-5-methyl-4-phenylthiazole to obtain a mixture C; the preparation method comprises the following steps: adding sodium dodecyl benzene sulfonate into hydrogenated diesel oil, then adding nano titanium dioxide and nano zinc oxide, and uniformly mixing to obtain dispersion liquid D; dissolving a dispersing agent in the hydrogenated diesel oil to obtain a solution E; and mixing the solution A and the solution B in a reactor, heating for reaction, adding the mixture C, heating for reaction, cooling, adding the solution E, adding the dispersion liquid D, heating for reaction, cooling, carrying out solid-liquid separation, and distilling to obtain the product. The corrosion and scale inhibitor prepared in the invention has good temperature resistance.

The invention relates to the technical field of road building materials, in particular to an early-strength low-resilience sprayed concrete material and a preparation method thereof. The preparation method comprises the following steps: preparing the modified accelerator; preparing a silicon dioxide nanowire; preparing a magnetic silicon dioxide nanowire; and preparing the early-strength low-resilience shotcrete material. Sodium alginate and sodium carboxymethyl cellulose are added in the preparation of the modified accelerator, the sodium alginate and the sodium carboxymethyl cellulose can cooperate with each other when being used together, a colloidal network formed by the sodium alginate can wrap and stabilize particles of a dispersed phase, and the particles of the dispersed phase can be dispersed by the sodium carboxymethyl cellulose through winding and interweaving of macromolecular chains of the sodium carboxymethyl cellulose. The viscosity and the stability of the dispersion system are further enhanced, so that the concrete material quickly forms a gel state, the resilience is reduced, and the concrete strength is improved.

The invention discloses an anti-settlement subgrade layered filling structure and a construction method, the anti-settlement subgrade layered filling structure comprises soft rock filler layers, a silty sand layer is filled every other soft rock filler layer with a fixed thickness, and a composite geomembrane is laid on the silty sand layer; the composite geomembrane sequentially comprises a curing layer and a drainage layer from bottom to top, the curing layer comprises a plurality of reinforcing units distributed in an array mode, each reinforcing unit comprises an upper layer and a lower layer which are filled with urease and cementing liquid respectively, the urease and the cementing liquid are sealed through the geomembrane, a trigger device is arranged in the upper layer, and the drainage layer is arranged in the lower layer. When the roadbed is settled, the trigger device moves downwards along with the roadbed to solidify the settled part; the drainage layer comprises a capillary drainage structure and is used for transversely guiding water out to the side slope. All the structural layers are matched with one another, outside water is prevented from entering a soft rock filling layer, meanwhile, the drainage capacity of the soft rock roadbed is greatly improved, the disintegration and softening effects of rainwater on soft rock are reduced, the service life of the soft rock roadbed is prolonged, the long-term stability of the roadbed is improved, and applicability is high.

The invention belongs to the technical field of immune cell culture, and particularly relates to an in-vitro amplification culture method of NK cells. The amplification method comprises the steps of CD16 pretreatment, plasma inactivation, lymphocyte separation and multi-stage fluid infusion. The preparation method comprises the following steps: pretreating CD16 in a T75 culture flask, promoting attachment and activation of NK cells, simulating a natural activation state, improving proliferation efficiency, treating whole blood and inactivating plasma to eliminate immunosuppressive factors, reserving nutritional ingredients, supporting amplification of the NK cells, enriching the NK cells through a lymphocyte separating medium, removing impurities and improving purity, mixing an RPMI-1640 culture medium with a solution A, and culturing for 12-24 hours at a high temperature; oK432 and IL-15 are added, the microenvironment is optimized, growth of the NK cells is remarkably promoted, liquid supplementing operation and bottling and bagging are carried out for multiple times, sufficient space and nutrition are provided, the cells are gradually transferred into a serum-free culture medium, and the cell safety and clinical application potential are improved.

The invention relates to the technical field of shield construction, in particular to a construction method for breaking and removing shield obstacles below a subway station through freezing and rotary cutting, and the construction method comprises the following specific steps: forming uniformly distributed pilot tunnel structures around a stand column pile by positioning the position of the stand column pile and horizontally drilling by using a drilling machine; after pilot tunnel drilling is completed, freezing pipes are inserted immediately to freeze soil around the stand column piles; a plurality of guide holes are formed in the stand column pile, hole expanders are placed in the guide holes, and hole expanding is started upwards in sequence; according to the construction method, the soil within the range needing obstacle clearing can be frozen, the supporting performance of the soil during shield construction is improved, and collapse and existing station settlement are avoided; meanwhile, drilling is conducted on the stand column pile, a reamer is adopted to conduct rotary cutting and breaking on the stand column pile, and expansive cement mortar is poured, so that the bearing capacity of the foundation can be guaranteed; obstacles on the subway shield route are removed on the whole, and the influence on the existing station in the construction process is reduced.

The invention relates to an Iguratimod preparation and a preparation method thereof, and belongs to the technical field of medicament preparation, and the preparation method specifically comprises the following steps: S1, treating a cyclodextrin derivative by using a compound enzyme to obtain enzyme-treated cyclodextrin; then carrying out oxidation crosslinking on the cyclodextrin subjected to enzyme treatment to prepare modified cyclodextrin; s2, mixing an iguratimod raw material medicine with a suspending aid, carrying out micronization treatment, then adding into a dispersion medium, and uniformly stirring to obtain an iguratimod suspension; s3, the modified cyclodextrin obtained in the step S1 and the iguratimod suspension obtained in the step S2 are homogenized and mixed, then freeze drying is conducted, and the iguratimod preparation is obtained. Through unique preparation design and optimization process, the dissolving property of the iguratimod is remarkably improved, the dissolution rate and bioavailability of the medicine are improved, the stability of the preparation and the medication convenience of a patient are ensured, and a more reliable and efficient solution is provided for clinical application of the iguratimod.

The invention discloses a cell culture device for gene detection, and belongs to the field of gene detection. A cell culture device for gene detection comprises a detection box and a microscope, the detection end of the microscope penetrates into the detection box, the bottom of an inner cavity of the detection box is fixedly connected with a low-speed motor, the top end of the output end of the low-speed motor is fixedly connected with a rotating disc, and three sets of clamping bases are distributed at the top of the rotating disc at equal intervals; a culture dish is inserted into the clamping seat; through rotation of the rotating disc, an upper contact ball and a lower contact ball are in contact extrusion, so that gas in a gas collection box is pushed to repeatedly enter a spring telescopic rod, a clamping seat is pushed to slide back and forth at the top of the rotating disc, and a culture solution in a culture dish and cells are slightly shaken; and nutrient substances are promoted to be uniformly distributed in the culture dish, cells are effectively prevented from settling to the bottom of the culture dish, the respiration of the cells is facilitated, the culture speed of the cells is ensured, and the gene detection efficiency is improved.

The invention relates to the technical field of reactors, and specifically discloses a pesticide processing suspension mixing reactor, comprising a mounting frame and a reactor body fixedly mounted on the mounting frame, wherein a self-adjusting stirring and cutting mechanism and a grinding auxiliary crushing mechanism are arranged in the reactor body, wherein the self-adjusting stirring and cutting mechanism comprises a plurality of stirring and chopping components evenly spaced, a driving component for driving the stirring and chopping components, an adjusting component and a hollow rotating shaft rotatably mounted between the top inner wall and the bottom inner wall of the reactor body, wherein the stirring and cutting blades rotate at high speed to rapidly dissolve soluble solid pesticide original drug particles in a solvent, thereby increasing the dissolution rate, and the high-speed rotating stirring and cutting blades generate strong shearing force, which can effectively break the attraction between solid pesticide original drug particles, prevent particle agglomeration, and simultaneously cut larger particles into smaller particles, so that the particles are rapidly and evenly dispersed in water, thereby ensuring the consistency of particle size, and forming a uniform and stable pesticide suspension.

The invention discloses a stably suspended water-based diamond grinding fluid and a preparation method thereof. The grinding fluid comprises the following components in percentage by mass: 0.4-0.8% of diamond micro powder, 1-5% of a Gemini type polyether quaternary ammonium salt surfactant, 0.1-2% of a pH regulator, 1-6% of a suspending agent, 0.01-0.2% of a preservative, 20-60% of a solvent and 10-40% of deionized water, and the sum of the mass percentages is 100%. The water-based diamond grinding fluid is high in grinding rate, small in TTV and high in grinding material dispersion stability, has the advantage of being not prone to sedimentation compared with a traditional water-based diamond grinding fluid, is safer, more environmentally friendly and easy to clean compared with an oily grinding fluid, and can avoid quality and potential safety hazards caused by temperature rise due to long-time operation.

The invention provides a coating composition, a preparation method, a water-based antistatic coating and application, and belongs to the field of coatings. The coating composition is prepared from the following components in parts by weight: 35 to 55 parts of water-based hydroxy acrylic resin, 0.1 to 0.3 part of amine neutralizer, 0.2 to 0.5 part of defoaming agent, 0.5 to 1 part of dispersing agent, 0.1 to 0.8 part of polysilicate magnesium aluminum, 10 to 15 parts of conductive mica powder, 20 to 30 parts of titanium dioxide, 0.5 to 1 part of silane coupling agent, 0.5 to 1 part of graphene, 0.2 to 0.5 part of thickening agent and 8 to 15 parts of solvent. According to the embodiment of the invention, the composition of the coating composition is reasonably designed, so that the adhesive force and the antistatic force of a coating layer formed by the coating on the CFRTP surface are improved at the same time.

The present invention relates to the technical field of burners, and in particular to a universal full-time ultra-low nitrogen burner, comprising: a combustion assembly, the combustion assembly comprising a combustion tube and an outer tube mounted on its outer layer, the cavity formed between the combustion tube and the outer tube being connected to a return air cavity, a combustion chamber being arranged in the combustion tube, the inlet end of the combustion chamber being respectively connected to a powder inlet, a plasma igniter and a purge assembly; a tempering nozzle, arranged on the inner wall of the combustion chamber outlet end, and its air inlet being connected to the cavity between the combustion tube and the outer tube, and its air outlet being connected to the combustion chamber and opposite to the powder inlet direction; a tempering channel, arranged on the inner wall of the combustion chamber, between the tempering air outlet of the tempering nozzle and the purge air outlet of the purge assembly, and having openings at both ends connected to the combustion chamber, for solving the technical problem in the prior art that the continuous operation of the burner needs to rely on a plasma igniter, resulting in low combustion efficiency.

The utility model discloses a floor slab formwork, and belongs to the technical field of floor slab formworks. Comprising a support beam; a plurality of template units are placed on the supporting beams; the side plates of the adjacent template units are bolted through the connecting bolts; the slots are formed in the end faces of the template units; the butt joint assemblies are arranged between the end faces of the formwork units on every two adjacent supporting beams; the reinforcing mechanisms are arranged in inner cavities of the formwork units between the bottoms of the butt joint assemblies and the tops of the supporting beams, the formwork units are supported on the supporting beams, the adjacent formwork units are tightly connected through connecting bolts to form the floor formwork, and the formwork units are tightly connected through the butt joint assemblies when the supporting beams are in butt joint. And auxiliary supporting is provided for the end faces of the formwork units at the butt joint assemblies through the strengthening mechanisms, the bearing capacity of butt contact is improved, sinking caused by butt contact is avoided, and the stability of the floor formwork is guaranteed.

The utility model relates to sofa manufacturing technical field especially is involved in the enhancement design of packing and transportation of sofa, a full dismounting sofa bed, including support base and sofa cushion subassembly, its characterized in that: support base includes support frame, support bottom plate and is located at the detachable supporting leg of support frame four corners, sofa cushion subassembly includes seat cushion, back cushion and side stop pad, seat cushion is detachably connected with support bottom plate through magnetic connection component, and the detachable connecting component is equipped between side stop pad and support bottom plate, back cushion and support bottom plate.

The invention belongs to the technical field of cosmetics, and particularly relates to a cosmetic composition containing deoxyarbutin and a preparation method of the cosmetic composition. The cosmetic composition is prepared from the following raw materials in percentage by weight: 2%-5% of deoxyarbutin, 9%-20% of polyol, 0.7%-1.5% of a bacteriostatic agent, 50%-75% of nanocellulose hydrogel, 0-5% of a humectant, 0-1% of a thickening agent and the balance of deionized water. According to the invention, oxygenolysis of deoxyarbutin in water is prevented, the texture and the smearing feeling of cosmetics are remarkably improved, the cosmetics can be better attached to skin, the product action time is prolonged, and the action effect and the use comfort feeling are improved.

The utility model relates to the field of daily appliance production, in particular to a computer turning table with adjustable crescent legs, which comprises a connecting frame for adjusting the length of the crescent legs, a support frame for adjusting the height of the crescent legs and a table top capable of turning, and the connecting frame comprises a first side frame connected with the support frame and a second side frame for changing the coverage area of the connecting frame. The sleeve rods are used for stabilizing the whole connecting frame, the rotating shaft is used for controlling the table top to rotate, the connecting frame is installed at the center of the lower surface of the table top and rotationally connected with the table top, the two supporting frames are installed on the two sides of the connecting frame respectively, the four sleeve rods are installed on the periphery of the connecting frame respectively, the first side frame is installed in the sleeve rods, and the second side frames are installed at the two ends of the first side frame. The stability of the whole table is guaranteed when the table top is turned over through movement of the first side frame and the second side frame, the sedimentation phenomenon caused by long-term use is avoided through a plug pin and plug hole mode, the use space is enlarged and reduced through turning over of the connecting plate, and the application range is wider.

The utility model discloses a steam pipeline construction supporting frame, which relates to the technical field of steam pipeline construction and comprises a supporting mechanism, a clamping mechanism is fixedly mounted at the top of the supporting mechanism, a moving seat is driven by an electric push rod to move, and a rotating arm and a clamping plate rotate inwards when the moving seat moves downwards. Therefore, the steam pipeline is clamped and fixed through the multiple clamping plates, the stability of the steam pipeline in the construction process is enhanced, it is guaranteed that the cylindrical steam pipeline is stably fixed to the supporting frame, the construction error of the steam pipeline is effectively reduced, meanwhile, the clamping mechanism can support and protect the steam pipelines with different outer diameters, and the practicability is high. And meanwhile, a rubber pad and an anti-skid pad are additionally arranged on one side of the clamping plate, the rubber pad has certain elasticity, meanwhile, the anti-skid pad is made of a polycarbonate material, the friction force between the clamping mechanism and the steam pipeline is enhanced, the steam pipeline is prevented from being damaged, meanwhile, the steam pipeline is clamped more tightly, and the firmness between the supporting frame and the steam pipeline is improved.

The present invention provides a method and device for polishing the inner surface of a pipeline with magnetic force assistance and a rotating fluid, and belongs to the field of mechanical technology. The polishing device includes a working platform, a fluid processing unit, a vibration unit, a magnetic control unit and a spiral guide unit. The fluid processing unit is symmetrically installed on both sides of the working platform, and the two ends of the workpiece are connected to the fluid processing unit; the spiral guide unit is a spiral rod with magnetic conductivity, which is located inside the workpiece, and the spiral structure on the surface of the spiral rod guides the polishing liquid from the original axial linear motion to the spiral feeding motion along the pipe wall, thereby improving the polishing efficiency. The present invention uses a magnetic force-assisted rotating fluid polishing device on the inner surface of the pipeline for polishing, which can achieve rapid and uniform polishing of the inner surface of a straight pipe and a pipe with variable roughness, thereby reducing the along-the-way resistance of the medium in the pipe, improving the sampling accuracy, and enhancing the stability of the fluid in the pipe, solving the problems of limited polishing of the inner surface of existing slender pipes, uneven processing, and low processing efficiency.

This utility model discloses a wet mixing and stirring device for surface modification of silicon carbide powder, belonging to the field of silicon carbide powder processing technology. It includes a mixing tank with a bearing at the top and a rotating shaft passing through the bearing. A first fixing frame is fixedly connected to the top of the mixing tank, and a motor is fixedly connected to the first fixing frame. Its advantages are that by setting up a spiral stirring paddle, a frame-type stirring paddle, and shearing blades, thorough mixing of materials can be achieved. When the motor drives the rotating shaft to rotate, the spiral stirring paddle can transport the silicon carbide powder at the bottom upwards, while the frame-type stirring paddle stirs the material in the middle and upper parts. The two work together to form a three-dimensional mixing effect, effectively preventing the silicon carbide powder from settling due to its high density. At the same time, the shearing blades on the inner wall of the frame-type stirring paddle can break up agglomerated powder, further improving the mixing uniformity and ensuring sufficient contact between the modifier and the silicon carbide powder, solving the problem of uneven mixing caused by traditional single stirring paddles.

The invention discloses a variable-rigidity connecting assembly, a machine tail connecting device and a using method. The variable-rigidity connecting assembly comprises a supporting body, a permanent magnet, a magnet exciting coil, an elastic sleeve and a magnetic current layer. The magnet exciting coil located on the outer side of the permanent magnet can generate a magnetic field in the same direction or in the opposite direction with the permanent magnet after being electrified, the magnetic current layer acts on the elastic sleeve under the influence of the magnetic field, the elastic sleeve is subjected to expansion and retraction deformation, variable-rigidity controllable connection between rigidity and flexibility at the connecting position is achieved, and the variable-rigidity permanent magnet motor is suitable for different use environments and has good application prospects. The problems of force suffocation, jamming and the like or the deformation of a connecting position are avoided; according to the tail connecting device, a connecting assembly with variable rigidity is arranged in a positioning hole formed in the butt joint of a first belt frame and a second belt frame in a sleeved mode, variable rigidity connection between rigidity and flexibility between the self-moving tail belt frames is achieved, control and adjustment can be conducted according to different working conditions, and the problems of force suffocation, jamming and the like are avoided.

The invention discloses SiBCN ceramic slurry for direct-writing type 3D printing as well as a preparation method and a printing method of the SiBCN ceramic slurry, and belongs to the field of ceramic additive manufacturing. The invention aims to solve the problem of non-uniform selection and dispersion of SiBCN precursor filler in existing direct writing printing. And the slurry is prepared from cured polyborosilazane (PBSZ) powder, an inorganic rheological additive, a rheological synergist and a polyborosilazane (PBSZ) liquid. The preparation method comprises the following steps: 1, curing polyborosilazane (PBSZ); 2, ball-milling and crushing; (3) weighing; and 4, preparing slurry. The printing method comprises the steps of 1, printing a primary blank; and 2, curing and sintering. The SiBCN ceramic slurry for direct-writing type 3D printing and the preparation and printing thereof are provided by the invention.

The present invention provides a wave-absorbing honeycomb core material and a wave-absorbing honeycomb core sandwich structure. The wave-absorbing honeycomb core material includes a honeycomb matrix, a resin bonding portion and a wave-absorbing material, wherein the resin bonding portion fixes the wave-absorbing material on the honeycomb matrix, and the wave-absorbing material is a surface-metallized hollow glass microsphere. The present application uses metallized hollow glass microspheres to replace the dielectric material and ferromagnetic material commonly used in wave honeycomb core materials in the prior art as wave absorbers. The metal-coated hollow glass microspheres have the advantages of low density and large specific surface area, and the hollow structure formed by loading the metal on the surface of the hollow glass microspheres has a thin metal coating on the one hand, which can effectively reduce the skin effect caused by the metal material, so that the electromagnetic waves can enter the interior of the wave-absorbing material, effectively improving the magnetic loss; on the other hand, after the electromagnetic waves enter the hollow microspheres, they will be reflected multiple times inside, further improving the absorption rate of the electromagnetic waves, thereby effectively improving the low-frequency wave absorbing performance.

The invention discloses a photovoltaic foundation suitable for a silt foundation, belongs to the technical field of photovoltaic installation, and can solve the problem that an existing photovoltaic foundation is not suitable for the silt foundation. The foundation comprises a ground beam structure which is arranged on a foundation and comprises a plurality of cross beams and a plurality of longitudinal beams which are connected in a crossed mode; the lower surfaces of the cross beams and the longitudinal beams are positioned on the same plane; the plurality of stand columns are respectively arranged at a plurality of intersections of the plurality of cross beams and the plurality of longitudinal beams, and the bottom ends of the stand columns penetrate through the corresponding cross beams and the corresponding longitudinal beams and are inserted into the foundation; and the bracket is connected to the top ends of the plurality of upright posts and is used for supporting the photovoltaic module. The method is used for installing the photovoltaic module on the silt foundation.

The wastewater treatment system comprises a wastewater treatment tank mechanism, and the wastewater treatment tank mechanism comprises a main tank body base, a main tank body, an auxiliary tank base, an auxiliary tank body, a heating opening, a liquid inlet, an auxiliary tank liquid outlet, a main tank liquid inlet pipe, a liquid inlet control valve, a main tank liquid outlet, a left sealing end cover, a right sealing end cover, a heat preservation layer and a lining layer. The main tank body is fixedly arranged on the main tank body base, the auxiliary tank bodies are fixedly arranged on the main tank body through the multiple sets of auxiliary tank bases, a liquid inlet is fixedly formed in the top of each auxiliary tank body, and a heating opening is formed in the end face of one side of each auxiliary tank body. The whole tank body is optimized for anti-corrosion treatment, so that the production cost of equipment is reduced; the corrosion to the inner wall of the tank body in a wastewater preheating link is improved. The pressure control precision is improved, the oxygen inlet mode is improved, and the phenomenon that the tank body and the pipeline are blocked due to the fact that inorganic salt settles or is attached to the pipe wall due to the long reaction period is reduced.

The invention discloses a chip continuous extraction device for a dry etching machine, and belongs to the technical field of semiconductor manufacturing equipment. Comprising a magnetic levitation conveying mechanism and a cleaning module, the magnetic levitation conveying mechanism comprises a track base plate, a motor stator module and a magnetic levitation and air floatation supporting plate, the motor stator module is arranged in the track base plate, the magnetic levitation and air floatation supporting plate is located above the motor stator module, and a limiting ring is arranged on the edge of the magnetic levitation and air floatation supporting plate; a multi-cavity air path structure is arranged in the magnetic suspension air floatation supporting plate, a permanent magnet array is arranged at the bottom of the magnetic suspension air floatation supporting plate, air floatation micropores are formed in the upper surface of the magnetic suspension air floatation supporting plate, and the cleaning module comprises an air supply module and an air return module. According to the invention, continuous and uninterrupted assembly line type extraction and on-line processing of chips from an etching machine to downstream equipment are realized, and the production efficiency, the positioning precision and the cleanliness are remarkably improved.

The invention provides a UV-cured color-tunable dual-emission room-temperature phosphorescent material as well as a preparation method and application thereof, and belongs to the technical field of color-tunable room-temperature phosphorescent functional materials. According to the invention, nitrogen-doped or nitrogen-metal ion-doped carbon quantum dots are used as a main ultraviolet light response phosphorescence color development center, a polyacrylamide and cellulose-based derivative double network is used as a substrate and a secondary phosphorescence color development center, acrylamide double bonds are broken into polyacrylamide through ultraviolet light, and further dehydration is carried out; the prepared room-temperature phosphorescent material shows different visible light colors under the excitation of ultraviolet light with two wavelengths, is tunable in color, can be applied to the fields of anti-forgery ink, optical information coding, photoelectric devices, advanced information encryption, humidity sensing detection and the like, and has wide application prospects. Wide popularization and application prospects are realized.