107results about How to "Reduce collapse" patented technology

The invention provides a preparation method of an isotropic Ti2AlNb / TiAl-based interpenetrating composite material, and belongs to the technical field of intermetallic compound-based composite materials. The method comprises the following steps: firstly, designing a Ti2AlNb reinforcement framework of various TPMS configurations by utilizing implicit function modeling; then, carrying out anisotropy research on the TPMS configuration by utilizing finite element simulation; secondly, a Ti2AlNb reinforcement framework of a TPMS configuration is prepared through a selective laser melting (SLM) technology; and finally, the TPMS configuration Ti2AlNb / TiAl-based interpenetrating composite material is prepared through vacuum hot pressing sintering of HPS. Therefore, strong anisotropy of a traditional fiber reinforced composite material in mechanical property is avoided, good matching of strength, plasticity and toughness of the composite material is achieved, and a new thought and a new solution are provided for breaking through the application bottleneck of TiAl in spaceflight power system hot end components.

The invention relates to the technical field of geological exploration, and discloses a complex stratum high-precision vertical settlement observation deep hole drilling process which comprises the steps of stratum pretreatment and grouting reinforcement, real-time monitoring of the position and posture of a drill bit and optimization of drilling parameters, intelligent prediction of the drilling parameters through a machine learning algorithm, and deep hole drilling. Real-time monitoring of drilling tool and geological changes and parameter adjustment, fault identification and processing suggestion, drilling quality inspection, wall surface strengthening treatment, and long-term monitoring and maintenance based on the Internet of Things; according to the technology, the drilling precision, efficiency and safety are improved, long-term stability of the drilling quality is ensured, through drill bit positioning and track optimization, the positioning precision is improved, the position and track of the drill bit can be predicted more accurately, errors are reduced, drilling parameters can be adjusted in real time according to the stratum characteristics, and the drilling efficiency is improved; by optimizing the drill hole wall surface strengthening treatment technology and process parameters, the stability and bearing capacity of the drill hole wall surface can be enhanced, and the risks of collapse and deformation of the drill hole are reduced.

The present invention relates to the technical field of glass blowing, and in particular to a glass product blowing molding device and method, comprising an openable and closable primary mold installed on a base, a liftable blind mold arranged above the primary mold, a liftable reverse blowing mechanism arranged below the primary mold, a transfer mechanism arranged in the middle of the base, an openable and closable forming mold arranged at one end of the base, and a liftable upper blowing assembly arranged above the forming mold. In the present invention, through the arrangement of a closed module, after the drip material is inflated to a prototype, the core rod in the reverse blowing mechanism moves downward and is separated from the jaw module, so that the closed module is turned into a closed state, the bottom end of the prototype is blocked, part of the air pressure is retained inside the prototype, and the internal air pressure of the prototype is greater than the external air pressure, thereby reducing the collapse and bending degree of the prototype, and adapting to the blowing process of a longer bottle body.

The invention discloses a porous microcrystalline graphite negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: fully contacting microcrystalline graphite with an alkali solution, drying, and carrying out first calcination in an inert atmosphere to obtain first porous microcrystalline graphite with etched crystal grain end surfaces; carrying out vacuum pressure impregnation on the first porous microcrystalline graphite by using an alkali solution, drying, and then carrying out second calcination in an inert atmosphere to obtain second porous microcrystalline graphite of which the crystal grain end surface and the interior are etched at the same time; and repeating the operation, reducing the concentration of the aqueous alkali adopted in each operation compared with the previous operation, and increasing the pressure to prepare the porous microcrystalline graphite negative electrode material. According to the preparation method disclosed by the invention, the microcrystalline graphite is subjected to vacuum pressure impregnation by repeatedly utilizing the aqueous alkali, so that alkali can enter a pore structure, and etching is carried out towards the interior of particles at high temperature, the pore structure of the prepared porous microcrystalline graphite negative electrode material is beneficial to rapid transmission of lithium ions, and the charge-discharge rate performance of the material is remarkably improved.

The invention discloses an intelligent sorting method and system applied to a conveyor belt, a medium and a program product, and the method comprises the steps: calculating the stacking density of articles, and determining the stacking density as an article compression ratio; determining the discharge port as an abnormal discharge port; reading weight parameters, volume parameters and target discharge ports of the to-be-sorted articles on the conveyor belt; marking the to-be-sorted articles corresponding to the target discharge port which is the abnormal discharge port as to-be-adjusted articles, and calculating a density value; calculating a linear distance according to the physical space coordinates of other discharge ports, and generating an initial standby discharge port grade table according to the linear distance; calculating corresponding residual capacity and residual bearing capacity; calculating a matching coefficient; reordering to obtain a final standby discharge port grade table; the discharging port with the first sequence in the final standby discharging port grade table serves as a temporary target discharging port; and the sorting execution device is controlled to transfer the to-be-adjusted articles to the temporary target discharging opening. The sorting efficiency of the conveying belt when the material opening breaks down is improved, and then the yield of objects sorted by the conveying belt is improved.

The invention discloses a foundation pit supporting device for civil construction, and belongs to the technical field of foundation pit supporting, the foundation pit supporting device for civil construction comprises a supporting main body, movable supporting boxes are arranged on the two sides of the supporting main body, and vibration tamping assemblies are arranged in the supporting boxes. According to the device, the auxiliary supporting assembly is arranged, a first motor drives a second friction ring to gradually make contact with a first friction ring through a reciprocating lead screw, a first lead screw base and a sliding ring, the first friction ring is limited, rotation of a rotating ring is avoided, and then a worker adjusts a supporting plate to be parallel to the vertical plane of a foundation pit; an adjusting motor drives an adjusting lead screw, a second lead screw seat and a supporting plate to move towards one side, so that the supporting plate is attached to the vertical face of the foundation pit, the vertical face of the foundation pit is supported and protected from the side face, the supporting main body and the foundation pit form triangular supporting, the supporting effect of the supporting box on the foundation pit is enhanced in an auxiliary mode, and meanwhile the supporting main body can be prevented from deviating; and the supporting effect on the foundation pit is improved.

The invention relates to the field of foundation pile foundation construction, in particular to a hole-forming construction method for a super-thick backfill complex geological cast-in-place pile. Comprising the steps of site leveling and pile position paying-off; performing primary drill bit rotary drilling and hole forming; a column soil body; forming a hole by a secondary drill bit rotary drilling pile machine; cleaning the hole; placing a reinforcement cage and a guide pipe; cleaning the hole for the second time; pile body concrete is poured; and inspecting and accepting. According to the method, a single construction process adopted in original cast-in-place pile hole forming is changed, an ultra-thick backfill complex geology in-situ SDDC in-hole deep dynamic compaction and rotary excavating pile hole forming construction technology is innovatively adopted, in a high-position backfill area, the SDDC in-hole deep dynamic compaction technology is used for forming a pile body cylindrical soil body easy to form a hole at an original pile position, then a rotary excavating process is used for forming a hole in a cylinder, and the pile body cylindrical soil body easy to form a hole is formed; the pile foundation hole forming quality under the complex geological condition is guaranteed, the construction cost is reduced through the combined construction technology, and the pile foundation hole forming construction quality is guaranteed.

The invention belongs to the technical field of metal oxides, and particularly relates to a preparation method of a high-oxygen-storage cerium-zirconium solid solution. The preparation method comprises the following steps: adding zircon salt, cerium salt and doped metal salt into water, stirring and preserving heat to prepare a salt solution; sequentially adding a dispersing agent and a precipitating agent into the salt solution, uniformly mixing, and precipitating to obtain turbid liquid; and sequentially carrying out aging and solid-liquid separation on the turbid liquid, and washing and roasting the obtained precipitate to prepare the high-oxygen-storage cerium-zirconium solid solution. By selecting the new precipitator and dispersant, the problem of insufficient oxygen storage capacity of the cerium-zirconium solid solution in the existing cerium-zirconium solid solution preparation method is improved, and the prepared high-oxygen-storage cerium-zirconium solid solution has good high-temperature sintering resistance.

The invention discloses a preparation method of polylactic acid fibers for medical and sanitary materials, and relates to the technical field of polylactic acid fibers. Nano-crystalline cellulose, nano-graphite particles and polylactic acid are blended and crosslinked, the mechanical property of a matrix is enhanced, the antibacterial property is achieved, fibers are prepared through spinning, supercritical carbon dioxide treatment is conducted for the first time, the nano-graphite particles can play a role of a nucleating agent, polylactic acid is promoted to form fine and uniform crystals, and the mechanical property of the matrix is improved. Carbon dioxide is effectively wrapped in the foaming process, a micropore structure is formed in the fiber, the mechanical property of a matrix is enhanced, then secondary supercritical carbon dioxide treatment is conducted, the nano-silver is loaded into the matrix through supercritical fluid, the antibacterial property and the mechanical property are further improved, then the nano-silver is soaked in a silicate solution, dehydration is conducted, and the nano-silver fiber is obtained. A silica gel layer is formed on the surface of the fiber, so that the mechanical property and the antibacterial property of a matrix are enhanced.

The invention discloses a ceramic pug for 3D printing direct-writing molding by using waste porcelain as a raw material, and a preparation method and a product thereof. Waste porcelain particles, Longyan kaolin, potassium feldspar, quartz, ulexite, water, a sodium silicate aqueous solution and a sodium tripolyphosphate aqueous solution are used as raw materials; the formed ceramic pug is prepared into a 3D printing direct-writing molded ceramic product through 3D printing direct-writing molding. According to the invention, the large-particle waste porcelain is used as a raw material, so that the recycling and crushing cost of the waste porcelain is reduced, the recycling proportion of the waste porcelain is increased, and the additional value of the product is increased by utilizing the unique appearance mechanism of the waste porcelain particles, so that a new technology and a new way are provided for the preparation of the ceramic pug for 3D printing direct-writing molding and the utilization of the large-particle waste porcelain.

The invention belongs to the technical field of open caisson control, and discloses a tunneling and bottom sealing method for a super-large-section vertical shaft, a first tunneling machine is adopted for tunneling an outer ring area of the bottom of the shaft along a sliding rail, a second tunneling machine is adopted for rotatably tunneling an inner ring area around the central axis of a rotary disc, the tunneling range is effectively expanded, and the construction requirement of the super-large-section vertical shaft is met; wherein the ring beam is pre-embedded around the upper part of the inner wall of the blade foot to support the arrangement of the slide rail and ensure the stable operation of the first heading machine; the working radius of the central operation platform is adjusted through the telescopic second heading machine so as to adapt to heading areas of different sizes, and the supporting legs can be stably clamped to the ring beam to maintain the stability of the central operation platform; according to the area ratio of the inner ring area to the outer ring area, the tunneling speed of the first tunneling machine and the second tunneling machine is adjusted, and the excavation consistency is guaranteed; the brush arm machine slides along the sliding rail and drives the brush head to be attached to the side wall of the blade foot for cleaning, it is ensured that no impurity is attached to the side wall of the blade foot, and structural hidden dangers caused by local weakness of the back cover are avoided.

The utility model relates to the technical field of metal printer wind fields, and particularly discloses an air inlet wind direction adjusting structure and a double-blowing wind field, comprising: an air guide component comprising an air frame, an air guide plate I arranged in the air frame, and an air guide plate II arranged below the air guide plate I in the air frame, longitudinal strip plates penetrating through the first air guide plate and the second air guide plate are vertically fixed into the air frame at equal intervals, and strip-shaped grooves are formed in the positions, corresponding to the longitudinal strip plates, of the surfaces of the second air guide plate and the longitudinal strip plates. The angle of the first air deflector and the angle of the second air deflector are synchronously adjusted through the adjusting assembly, controllability of the air direction is achieved, and the requirements of different air directions are met; the blocking assembly can block other spaces in the air frame, so that air can only be exhausted from the space between the first air guide plate and the second air guide plate, scattering of the air is reduced, the flow speed of the air is increased, and the pointing accuracy of the air is improved. And the upper and lower independent wind field structures increase the air flow in the chamber, so that the metal dust can be better brought out.

The invention belongs to the field of battery materials, and particularly relates to a dual-dimensional carbon-coated silicon-carbon negative electrode material as well as a preparation method and application thereof. The silicon-carbon negative electrode material comprises silicon-carbon composite particles, the silicon-carbon composite particles comprise carbon material matrix particles and elemental nano silicon attached to the carbon material matrix particles; the carbon material matrix particles contain metal nanoparticles; the surfaces of the carbon material matrix particles are coated with one-dimensional carbon fibers, and the surface of the elemental nano silicon is coated with a two-dimensional graphene-like carbon layer. The preparation method is characterized in that the metal nanoparticles are pre-embedded in the carbon material matrix particles to induce and regulate the generation of a specific carbon structure, and meanwhile, the ionic conductivity and the electronic conductivity of the silicon-carbon negative electrode material are improved, so that the cycle performance and the capacity retention ratio of the silicon-carbon negative electrode material are improved.

The invention provides a temperature control coaxial spray head device for biological 3D printing and a photocuring printing method. The device comprises a rack, a coaxial printing nozzle and a UV light curing module. Accurate temperature adjustment of different biological materials is achieved through the temperature control module of the coaxial printing nozzle, it is ensured that the biological materials and biological cells in the materials are printed at the optimal temperature, and the printing efficiency is improved by replacing coaxial printing needles with different lengths and transparent outer needle walls and adjusting the UV photocuring mechanism. The UV light source forms a light spot on the outer side of the outer needle head of the coaxial printing needle head, and biological materials in the outer needle head of the coaxial printing needle head are pre-cured by controlling the power of the UV light source, the position and the size of the light spot, so that printing of a biological scaffold with high precision, multi-material integration, complex geometrical shape, adjustable porosity and gradient and better biocompatibility is met.

The utility model discloses a stope overlying strata space three-in-one gangue slurry filling system which comprises a ground gangue slurry preparation system, and the output end of a grouting filling pump is connected with the input end of a gangue slurry underground conveying pipeline and the input end of a gangue slurry ground conveying pipeline. The output end of the gangue slurry underground conveying pipeline is connected with the input end of the low-position grouting filling pipe and the input end of the adjacent-position grouting filling pipe, the output end of the adjacent-position grouting filling pipe is connected with the input end of the adjacent-position grouting drill hole, and the output end of the gangue slurry ground conveying pipeline is connected with the input end of the separation grouting drill hole. According to the utility model, gangue slurry is filled into the caving zone through the low-position grouting filling pipe by utilizing the slurry filling control system, the gangue slurry is filled into the fissure zone through the adjacent grouting drill holes, and the gangue slurry is filled into the separation zone in the bent sinking zone through the separation grouting drill holes. Under the condition that normal production of a working face is not affected, the gangue slurry is safely and efficiently filled into an overlying strata space in a large-scale and low-cost mode.

The invention discloses a multilayer nickel-cobalt-based OER catalyst and a preparation method thereof. The multilayer nickel-cobalt-based OER catalyst is characterized in that the catalyst is of a three-layer structure composed of a supporting layer, a middle layer and a skin layer, the supporting layer is foamed nickel, the middle layer is nickel-cobalt layered double hydroxide NiCo-LDH growing on the foamed nickel, the skin layer is ZIF-67, and the ZIF-67 is embedded in the nickel-cobalt layered double hydroxide. The prepared multi-layer nickel-cobalt-based OER catalyst can be applied to the field of electro-catalysis, an organic metal framework material is introduced, meanwhile, use of a binder (such as a Nafion solution) is avoided, controllable synthesis of an MOFs material is achieved, accordingly, excellent OER performance and stability are achieved, a ZIF-67 layer grows through an electroplating method instead of other high-energy-consumption modes such as hydrothermal growth, and the performance of the catalyst is greatly improved. The preparation efficiency is improved, the loss of raw materials is reduced, and higher industrialization potential is brought.

The invention discloses a foundation pit health state prediction method based on underground water level monitoring, and belongs to the technical field of foundation pit health state prediction.The method specifically comprises the steps that the underground water level is monitored in real time, underground water level data are collected in real time, and the collected underground water level data are preprocessed; establishing an underground water level change model based on the preprocessed underground water level data, and analyzing the change of the underground water level; analyzing the relationship between the change trend of the underground water level and the stability of the foundation pit, and establishing a foundation pit health state evaluation model to obtain a foundation pit health state index; predicting the health state of the foundation pit in a period of time in the future based on the change trend of the underground water level; the foundation pit health state is divided into different health state grades, and corresponding measures are made according to the actual health state grades; the foundation pit health state is comprehensively analyzed by combining underground water level changes, foundation pit soil body characteristics, supporting structure performance and an underground water flowing mode, and the method is suitable for foundation pit engineering under complex geological conditions.

The utility model discloses a battery central tube and a battery, the battery central tube comprises a central body, the central body is arranged in a roll core of the battery, and the central body is an aerogel structure body. Through the application of the aerogel central tube structure, the aerogel central tube structure suitable for the cylindrical battery is provided, the wettability of electrolyte in the battery can be effectively improved, the infiltration rate of the electrolyte in the periodic extrusion and infiltration process is promoted, and the electrical performance exertion of the battery is ensured; meanwhile, after the aerogel absorbs the electrolyte, the aerogel is converted into lyogel and is tightly attached to the inner wall of the roll core through the swelling effect, and the collapse problem of the center hole is relieved; the central tube has the characteristics of simple structure, light weight, flame retardance and acid and alkali resistance, the service life of the central tube is further prolonged, the infiltration of electrolyte and the transmission of gas generated in the working process of the battery can be promoted through the porous outer wall, and the cycle life of the battery is favorably prolonged.

An opening is formed in the side wall of the front section of a reducing part of a Venturi tube, an air suction tube externally connected with an oxygen source is introduced into the opening, an air suction tube body is located in the Venturi tube, and an air suction tube outlet extends to the position of a patient interface; a valve block matched with the pipe diameter is arranged in the air suction pipe, the valve block is fixedly connected with a shaft rod of the adjusting rotating wheel, the valve block can be driven to rotate in the air suction pipe by rotating the adjusting rotating wheel, and therefore the opening degree of an air inlet channel of the air suction pipe is adjusted. According to the utility model, constant bias flow towards the interior of the lung is added in the whole breathing process, and meanwhile, the bias flow can be used for adjusting the flow, so that the oxygen saturation of a patient in the exercising process is in a stable state; in addition, the phenomena of alveolar collapse or pulmonary atelectasis aggravation caused by overlarge shearing force at the end of expiration of the patient can be reduced as much as possible.

The utility model is suitable for the technical field of planting and cultivation, and provides a mining area waste dump caragana microphylla cultivation auxiliary device which comprises a positioning plate, a through hole is formed in the top of the positioning plate, two symmetrical T-shaped grooves are formed in the top of the positioning plate, and a plurality of sliding holes are formed in the top of the positioning plate; according to the device, the problems that in the existing cultivation process, to-be-cultivated caragana microphylla is mostly put into dug planting pits, then the pits are filled, the planting process is completed, but in the early stage of planting completion, the planting efficiency of the caragana microphylla is greatly improved, and the planting efficiency of the caragana microphylla is greatly improved are solved. Due to the fact that the mine dump is a giant artificial loose pile pad body, when the mine dump is in the condition of windy weather, the caragana microphylla which is just planted is easily blown down by wind, the survival rate of the caragana microphylla in the mine dump is reduced, the phenomenon that the caragana microphylla collapses in the windy weather is reduced, and the survival rate of the caragana microphylla in the mine dump is increased.

The utility model discloses leather base cloth for a noise reduction type foot pad, which comprises a polyurethane resin layer, a base cloth layer, a noise reduction layer and a non-slip mat layer, the polyurethane resin layer, the base cloth layer, the noise reduction layer and the non-slip mat layer are fixedly adhered in sequence from top to bottom, a plurality of sound absorption concave holes are arranged on the lower side surface of the noise reduction layer, and the noise reduction concave holes are communicated with the non-slip mat layer. Supporting cushion blocks are arranged in the sound absorption concave holes in a clearance fit mode, positioning protruding columns are arranged at the bottoms of the supporting cushion blocks, positioning holes are formed in the anti-skid cushion layer, and the positioning holes are matched with the positioning protruding columns in an inserted connection mode. A reinforcing structure and an anti-skid design are added, the problems that the sound insulation layer collapses and the foot pad slides after the foot pad made of leather base cloth is used for a long time are effectively solved, the technical performance and the safety of a product are improved, and better use experience and driving safety guarantee are provided for a user. According to the scheme, the multi-layer structural design is adopted, the durability of the whole foot pad can be improved, the service life can be prolonged, the replacement frequency is reduced, and the use cost is saved.

The utility model discloses brick discharging equipment for brick production, which comprises a frame body, an operation table arranged on the frame body, a servo motor arranged in the frame body, a conveying rotating shaft arranged on the servo motor, a conveying belt arranged on the conveying rotating shaft, a first bevel gear arranged at the left end of the conveying rotating shaft, and a second bevel gear arranged beside the first bevel gear. A first connecting rod is arranged on the second bevel gear, a first transmission gear is arranged on the first connecting rod, a third bevel gear is arranged above the first transmission gear, a fourth bevel gear is arranged beside the third bevel gear, a second connecting rod is arranged on the fourth bevel gear, a fifth bevel gear is arranged at the right end of the second connecting rod, and a sixth bevel gear is arranged beside the fifth bevel gear. A first transmission gear is arranged below the sixth bevel gear, and a second transmission gear is arranged beside the first transmission gear. The brick conveying device is provided with the limiting anti-falling device and the synchronous brick arranging device, bricks can be prevented from falling off from the conveying belt in the conveying process, the bricks in the conveying process can be tightly attached, and the effects of improving the yield and protecting the bricks are achieved.

The invention relates to the technical field of coatings, and particularly discloses a flame-retardant, heat-insulating and sound-insulating coating and a preparation method thereof.The flame-retardant, heat-insulating and sound-insulating coating is prepared from, by weight, 80-100 parts of styrene-acrylic emulsion, 30-40 parts of deionized water, 10-15 parts of modified heat-insulating particles, 20-25 parts of sound-insulating particles and 2-5 parts of flame retardant; 15-20 parts of a filler and 2-3 parts of a dispersant; 1-1.5 parts of a defoaming agent, 1-2 parts of a thickening agent and 4-5 parts of a film-forming agent; wherein the modified heat insulation particles are modified silicon dioxide aerogel. The problem that the thermal insulation performance of the water-based paint is reduced due to agglomeration and collapse of aerogel can be solved.

The utility model relates to a movable dustproof awning supporting device which comprises a horizontal support, a stand column, an inclined supporting rod, a balance weight frame, a top beam, a steel wire rope and a ground beam. The stand column is vertically installed in the middle of the horizontal support. The top end of the inclined supporting rod is fixedly connected with the stand column, and the bottom end of the inclined supporting rod is fixedly installed on the horizontal support. A plurality of groups of horizontal supports, stand columns, inclined supporting rods and counterweight frames are arranged at intervals in the front-back direction, and the top of each stand column is detachably connected with a top beam. Ground beams are vertically and detachably connected between the horizontal supports in the front-back direction, the ground beams are located on the side opposite to the inclined supporting rods, and the balance weight frames are arranged on the connecting points of the ground beams and the horizontal supports; the horizontal supports, the stand columns, the inclined supporting rods, the balance weight frames and the top beams are arranged in two rows in a bilateral symmetry mode, and steel wire ropes are vertically connected between the left set of top beams and the right set of top beams. Compared with a traditional dustproof awning supporting structure, bolts do not need to be embedded, and a foundation does not need to be poured; and after use, the top beam and the ground beam can be detached and can be repeatedly used, so that the construction cost is reduced.

The utility model discloses a low-voltage integrated power distribution cabinet, and relates to the field of power distribution cabinets, door handles are arranged on the left and right sides of the upper part of a cabinet body assembly, adjusting assemblies are arranged on the left and right sides of the lower part of the cabinet body assembly, a waterproof assembly comprises at least one arc-shaped wire box and guide blocks, and the guide blocks are arranged on the front and rear sides of the arc-shaped wire box. A wiring groove is formed in one surface of the arc-shaped wire box; a limiting ring plate is fixedly connected to the inner side of the arc-shaped wire box, sliding rails are fixedly connected to the middles of the front side and the rear side of the arc-shaped wire box, a handle is fixedly connected to the outer side surface of the arc-shaped wire box, springs are fixedly connected to the inner sides of the guide blocks on the two sides, limiting clamping blocks are fixedly connected to the other ends of the springs, and guide columns are fixedly connected to the outer sides of the limiting clamping blocks. According to the design, the problems that an existing power distribution box cannot adapt to various terrains, and the safety and the use effect of the power distribution cabinet are affected due to the fact that water easily enters a wiring position are solved.

The invention discloses a graphene film for lithium metal negative electrode protection and a preparation method thereof, belongs to the technical field of lithium batteries, and solves the problem of poor battery cycle performance caused by non-uniform deposition and dissolution of a lithium metal negative electrode in the prior art. The graphene film is formed by stacking graphene sheets, the structure is complete and free of defects, the thickness ranges from 0.02 micron to 1 mm, and the surface loading capacity ranges from 0.1 mg / cm < 2 > to 5 mg / cm < 2 >. The graphene film provided by the invention is applied to the surface of a lithium metal negative electrode, does not react with metal lithium and is stable in chemical property.

The utility model discloses a foundation joint reinforcing structure capable of improving the crack resistance of a traditional brick structure wall body, which belongs to the technical field of brick structure wall body reinforcement, and comprises a brick wall, a wall joint is filled in the brick wall, and the wall joint is arranged in the brick wall. A plurality of sets of symmetrically-arranged mounting steel bars are arranged at the horizontal position of the wall seam, threaded rods are arranged at the positions, close to the two ends, of the opposite faces of the two mounting steel bars which are symmetrical front and back, a pair of connecting blocks are fixedly connected to the outer sides of the mounting steel bars, and connecting plates are arranged on the outer sides of the connecting blocks in a clamped mode. A traditional brick wall body can be reinforced and protected, the anti-cracking capacity of the wall body is improved, the collapse situation of the brick wall body is reduced, the distance adjusting assembly is arranged, the distance of the reinforcing assembly in the vertical direction can be adjusted so as to adapt to wall body gaps of different specifications, and the use range of the reinforcing structure is widened.

The present application relates to the technical field of feed additives, and specifically discloses a process for spray-dried blood meal. A process for spray-dried blood meal comprises the following steps: (1) pretreatment: filtering fresh blood to remove residues for standby use; (2) adjusting pH: using sodium citrate buffer solution to adjust the pH value to 6.8-7.2; (3) spray drying: using a high-precision centrifugal pump to transport the adjusted blood into a spray tower for spray drying; (4) permeate treatment: dispersing the powder formed by spray drying in the permeate, treating at 25-30°C for 3-3.5h, centrifuging, drying at 30-35°C, and reducing the moisture content to 40-60%, and then performing variable temperature pressure difference puffing treatment; (5) coating: coating the powder formed by spray drying through a fluidized bed, and packaging and storage; In addition, the preparation method of the present application has the advantages of increasing the nutrient content and digestibility of the product blood meal.

The invention relates to a foundation treatment method which comprises the steps that S1, foundation treatment is conducted; S2, piling is conducted, specifically, a steel pipe pile and a pile tip arranged on the lower end face of the steel pipe pile are sunk into the position below the foundation in the step S1 through a vibration pile sinking and pulling machine, and the lower end face of the steel pipe pile reaches the designed elevation; s3, filling and tamping are conducted, specifically, the mixed lime soil is transported to the position beside the steel pipe pile in the step S2 through transportation equipment, then the steel pipe pile hole in the step S2 is slowly filled with the lime soil through conveying equipment, and the lime soil in the steel pipe pile is tamped through tamping equipment; and S4, pulling-out is conducted, specifically, after tamping is completed, the steel pipe piles and the tamped lime soil are pulled out through a vibration pile sinking and pulling machine to form supporting piles, the lime soil supporting piles obtained through the steps S1 to S4 are obtained, compared with pine piles or Chinese fir piles, the tamped lime soil supporting piles have good compactness and integrity, and the vertical bearing capacity and the lateral bearing capacity of the supporting piles are improved. The method has the effect of improving the bearing capacity of the foundation and the stability of the river channel revetment.

The present invention discloses a prefabricated modular trench support system that is beneficial to environmental protection, which includes a guard plate, a bottom plate and a support rod, wherein the guard plates are provided in a plurality of pairs, each pair of the guard plates is arranged along the length direction of the trench, and the two guard plates of the same pair are respectively installed on both sides of the trench along the length direction; the bottom plate is installed at the bottom of the trench, and the two guard plates of each pair are respectively fixedly installed on both sides of the bottom plate along the length direction of the trench; an elastic waterproof strip is provided between two adjacent guard plates on the same side, and the support system further includes a first driving member for driving each elastic waterproof strip to deform and cling to the two adjacent guard plates; the support rods are provided in a plurality of pairs and can be retracted, and the two ends of the support rods are respectively fixedly connected to the two guard plates of the same pair. The present application has the effect of reducing the loss of earthwork caused by water infiltration from between the guard plates.