75results about How to "Reliable anchoring" patented technology

The invention relates to a coconut shred vegetation blanket protection revetment and a construction method thereof.The coconut shred vegetation blanket protection revetment comprises a plurality of coconut shred vegetation blankets arranged on a side slope of a river or a mountain or a terrace, the coconut shred vegetation blankets are sequentially arranged in a lap joint mode in the extension direction of the side slope, and the coconut shred vegetation blankets are anchored to the side slope through anchoring parts; a seed layer is scattered on the coconut shred vegetation blanket, a layer of planting soil covers the seed layer, and a seed layer is scattered on the surface of the planting soil. According to the method, flexible slope protection can be conducted on slopes of roads, railways and river channels, construction is rapid, the soil fixation effect is good, the method and roadbed construction can be conducted at the same time, the soil fixation and slope protection effects are achieved through different plant communities, the construction cost is much lower than that of a traditional method, and the later maintenance cost is almost zero. The coconut shred vegetation blanket can be applied to various urban landscaping, the construction speed is high, the survival rate is high, selectivity is high, a large amount of water is not needed, the current situation of water use is fundamentally solved, and a large amount of cost is saved.

The invention belongs to the technical field of films, and relates to an anti-dazzle anti-reflection anti-fingerprint film, which comprises a transparent support body, an anti-dazzle hardening coating and an anti-reflection coating, and the anti-dazzle hardening coating is obtained by coating and curing a coating liquid prepared from the following components in parts by mass: 1 to 40 parts of resin 1, 1.8 to 4.8 parts of resin 2, 0.75 to 3.25 parts of a photoinitiator and 0.3 to 1.75 parts of a thermal curing agent, the anti-glare coating is prepared from the following components in parts by weight: 0.75 to 4.75 parts of anti-glare particles, 0.25 to 1.25 parts of a flatting agent 1, 0.03 to 0.15 part of a flatting agent 2 and 44.05 to 76.12 parts of a solvent, the antireflection coating is obtained by coating and curing a coating liquid prepared from the following components in parts by mass: 0.47 to 1.8 parts of resin 2, 2.4 to 6.0 parts of resin 3, 0.12 to 0.75 part of a photoinitiator, 0.1 to 0.45 part of a thermal curing agent, 0.18 to 1.65 parts of a flatting agent 3, 0.56 to 2.4 parts of modified hollow silicon dioxide, 0.1 to 1.25 parts of a wetting dispersant and 85.7 to 95.74 parts of a solvent. According to the technical scheme provided by the invention, the anti-glare and low-reflection coating has good anti-fingerprint performance, coating adhesive force and friction resistance while having anti-glare and low-reflection performance.

The invention discloses a metal monatomic supported sodium ion battery negative electrode material and a preparation method thereof. The preparation method of the negative electrode material comprises the following steps: roasting a biomass source into hard carbon, preparing a precursor-containing mixture, preparing a non-metal heteroatom doped hard carbon material, decorating metal monatomic, dipping, washing and drying. The preliminarily synthesized biomass carbon source hard carbon material is subjected to step-by-step monatomic point modification, so that the interlayer spacing of graphite nano domains is effectively increased, the functional group structure and concentration of defects are optimized, and the diffusion kinetic energy barrier of sodium ions in the hard carbon material is reduced. Tests show that the sodium-ion battery prepared from the metal monatomic-loaded sodium-ion battery negative electrode material prepared by the invention has the capacity up to 342mAh / g, the first-week coulombic efficiency up to 91.2% and the capacity retention rate exceeding 95% after 200-week charging and discharging at 0.1 C. The preparation method disclosed by the invention is very simple and excellent in effect, and can be widely applied to the fields of lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries and lithium ion batteries. The large-scale commercial popularization of the sodium ion battery is favorably promoted to a great extent.

A fabric-based implant or prosthetic tubular or non-tubular product is provided that requires two materials: a fabric and an impermeable non-organic hydrophobic or super-hydrophobic material that, when built into the graft product of the invention, create three different regions. The resulting self-sealing implant or prosthetic product has super moisture resistance and is thus easier to transplant from the body. Tolerance of transplantation to electrosurgical energy, such as electrocauterization, is further improved through a surface. The implant or prosthesis product also prevents leakage and transmural communication or migration through the implant or wall while still allowing tissue to grow inwardly along at least a portion of one surface of the implant or prosthesis for secure anchoring.

The invention provides an anti-degradation automobile exhaust purification three-way catalyst and a preparation method thereof.The three-way catalyst comprises a carrier and a coating coated on the carrier, and the coating comprises a lower coating, a middle coating and an upper coating which are sequentially arranged on the carrier from bottom to top; the lower coating comprises a magnesium-aluminum composite oxide, a first cerium-zirconium composite oxide and precious metal Pd, the middle coating comprises a lanthanum-aluminum composite oxide, a second cerium-zirconium composite oxide and precious metal Rh, and the upper coating is a lanthanum coating formed by dipping a lanthanum salt solution. According to the catalyst disclosed by the invention, the noble metal Pd and the MgO-Al2O3 material are combined, so that the Pd is effectively anchored on the carrier more stably under a high-temperature condition, the Pd is distributed more uniformly, the ignition of the catalyst can be effectively accelerated, and meanwhile, the high-temperature stability of the catalyst is ensured; the outermost layer of the catalyst is impregnated with lanthanum salt to adjust multi-layer distribution control of La in the catalyst, and the anti-sintering performance of the catalyst is further improved.

The utility model relates to the technical field of cranes, and particularly discloses a portal crane anchoring device which comprises a crane body and a track, a mounting plate is arranged on one side of the crane body, an anchoring component is pivotally connected onto the mounting plate, a connecting plate is arranged on the side surface of the mounting plate, and one end of the connecting plate is pivotally connected onto the mounting plate. The connecting plate is connected with the anchoring assembly through a bolt, a first anchoring block is arranged on the side wall of the track, and a second anchoring block is arranged on the ground on one side of the track. According to the anchoring device, the anchoring assembly is matched with the first anchoring block and / or the second anchoring block in an inserted mode, anchoring of the crane body is achieved, anchoring is stable and reliable, the anchoring assembly can be selected to be in anchoring connection with the first anchoring block and / or the second anchoring block according to different field conditions, flexibility is high, anchoring efficiency is improved, and the anchoring device is convenient to use. A pure mechanical structure is adopted as a whole, the cost is low, dependence on electricity, gas and liquid is eliminated, the failure rate is reduced, and use is stable and reliable.

The present invention relates to a buoy system, comprising: a buoy body; and an anchoring device, which is arranged below the buoy body and is used to stabilize the buoy body, and the buoy body comprises: a main cabin, at the bottom of which the anchoring device is arranged; a mast, which is arranged above the main cabin; a plurality of brackets, which surround the side of the main cabin; and a plurality of outer wall components, which are fixed on the brackets and fixed on the outer side of the main cabin, and form a closed floating chamber with the brackets and the side of the main cabin. The present invention realizes structural modularization, simplifies the production process, and is convenient for transportation and loading and unloading. It can be deployed and recovered by small and medium-sized fishing vessels and engineering ships, reducing the cost of using ships, and optimizes its internal space structure. A variety of equipment can be installed in the buoy to meet monitoring requirements.

This invention relates to the field of oilfield thermal recovery well technology, and discloses a well completion process device, a column-type ground anchor, and a method for increasing the prestress of the oil layer casing. The well completion process device includes a surface casing (1) located below the surface, an oil layer casing (2), and a casing head body (3). The oil layer casing is connected to the inner surface of the casing head body via a connecting assembly (40). A column-type ground anchor (500) is connected to the bottom of the oil layer casing. The column-type ground anchor includes an anchor claw (502) and a plunger body (530). A liquid outlet (501) is formed on the column-type ground anchor. The anchor claw can extend out of the side wall of the plunger body and insert into the formation. Cement can be discharged from the liquid outlet to seal the annular gap between the oil layer casing and the formation. This invention uses hydraulic oil to insert the anchor claw into the formation, pulling the oil layer casing to a preset load. After the oil layer casing is pulled up, it is clamped to the inner wall of the casing head body via the connecting assembly, thus increasing the prestress.

The invention discloses a pre-tensioning method CFRP rib concrete hollow slab, a tensioning anchorage device and a construction method.The pre-tensioning method CFRP rib concrete hollow slab comprises CFRP embossed ribs, a framework structure, spiral ribs, PVC pipes, cushion blocks and concrete, the cushion blocks are arranged on the lower sides of bottom plate steel bars and the outer sides of vertical steel bars on the two sides respectively, and the CFRP embossed ribs are distributed at equal intervals, arranged in the framework structure and used for tensioning the framework structure; the spiral ribs penetrate through the prestressed CFRP embossed ribs and then are placed at the two ends of the bonding sections of the prestressed CFRP embossed ribs, the PVC pipes penetrate through the prestressed CFRP embossed ribs and then are placed at the two ends of the prestressed CFRP embossed ribs, unbonded sections are formed, concrete is poured on the periphery of the framework structure in cooperation with a mold after the CFRP embossed ribs are tensioned, the mold is dismantled after the concrete is formed, and the prestressed CFRP embossed ribs are formed. And the pre-tensioning method CFRP bar concrete hollow slab structure is formed. According to the scheme, the CFRP embossed ribs can be reliably bonded with concrete under high prestress, and bonding slippage failure is avoided. And secondly, provided anchoring is reliable, and shear damage of the CFRP ribs during tensioning is avoided.

The invention relates to a stent structure, a medical stent and a preparation method of the medical stent, a first interval stent section and a second interval stent section are connected with the two ends of a middle stent section respectively, a first end stent section is connected with the end of the first interval stent section, and a second end stent section is connected with the end of the second interval stent section; the first end stent section and the second end stent section have first stent body flexibility, the first interval stent section and the second interval stent section have second stent body flexibility, the middle stent section has third stent body flexibility, the first stent body flexibility is smaller than the second stent body flexibility, and the second stent body flexibility is smaller than the third stent body flexibility. The stent structure is divided into five sections, the flexibility of each section can be designed in a targeted mode, the fatigue resistance and the long-term patency rate of the stent structure are improved, the stent structure conforms to various composite stress conditions such as bending, torsion, compression and extrusion of peripheral blood vessels, and the risks of blood vessel damage and stent breakage caused by poor compliance of the stent structure are reduced.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The application relates to the technical field of household appliances, in particular to a refrigerator comprising a cabinet, a cabinet inner container, a refrigeration pipeline, a fixing assembly, the cabinet inner container is provided with a mounting port, the fixing assembly comprises a fixing piece used for fixing the refrigeration pipeline and a screwing piece connected to the fixing piece, and the screwing piece is configured to rotate relative to the mounting port so as to fix the refrigeration pipeline to the cabinet inner container. The fixing assembly used for mounting the refrigeration pipeline is convenient to install and reliable in connection.

The utility model discloses a kind of widening structure of municipal road, including the filling plate as widening base layer, the accommodating groove of downward recess is equipped on filling plate upper surface, the rubber particle layer solidified by cementing agent is filled in accommodating groove, the groove bottom of accommodating groove is equipped with reinforcing plate that is interlaced longitudinally and transversely, reinforcing plate is fixedly connected with filling plate, for enhancing the overall stiffness and deformation resistance of widening structure, the bottom of filling plate is connected with connecting assembly, connecting assembly includes the connecting column inserted into soil, the outer wall of connecting column is equipped with the plug-in cone for increasing friction, connecting column is equipped with expansion assembly in, expansion assembly includes the pull block for making the outer wall of connecting column outwardly offset, the surface of filling plate, connecting assembly and expansion assembly is equipped with rust-proof paint. By filling plate and rubber particle layer combination, it is convenient to quickly lay, also can cope with certain degree of thermal expansion and cold shrink, the cooperation of connecting column and expansion assembly realizes firm anchoring with ground.

The invention discloses an artificial fish reef and an artificial fish reef putting method, and belongs to the technical field of water ecological restoration and fishery engineering. The artificial fish reef comprises a reef body, an anchoring structure and a take-up structure. The reef body is of a reinforced concrete frame structure, a bottom plate is closed, other faces are open, protective nets and cross beams are arranged on the side portions, the cross beams are connected through connecting rods, and planting boxes can be installed on the connecting rods. The anchoring structure comprises an anchor hook and an anchor chain, and the take-up structure comprises a take-up box, a take-up roller, a spring and a spring trigger assembly. Through cooperation of the trigger rod and the limiting rod, automatic retracting, releasing and anchoring of the anchor chain are achieved, the structure is stable, installation is convenient and fast, water flow scouring can be effectively reduced, the survival rate of submerged plants is increased, a spawning and inhabiting place is provided for fishes, and the fish gathering effect is remarkably improved.

The utility model discloses an adjustable expansion anchor bolt which comprises a trapezoidal main sliding block and side sliding blocks installed on the two sides of the main sliding block in a sliding mode respectively, the sides, away from the main sliding block, of the side sliding blocks are arranged to be vertical faces, a screw rod is arranged in the center of the top of the main sliding block, and a hand-screwing nut is installed on the screw rod. The utility model has the beneficial effects that by arranging the trapezoidal main sliding block and the two side sliding blocks connected with the main sliding block in a sliding manner, a user can shorten the distance between the hand-screwing nut and the main sliding block by screwing the hand-screwing nut during use, and the main sliding block cannot rotate due to the limitation of the side sliding blocks, so that the use is convenient. In the process, due to the fact that the main sliding block is in a trapezoid shape, the two side sliding blocks can be pushed away in the opposite directions, the vertical faces of the outer sides of the two side sliding blocks tightly abut against the inner walls of the two sides of the blind hole, and stable anchoring is formed on the blind hole.

This invention discloses a samarium-modified biochar catalyst, its preparation method, and its application. The method includes the following steps: Step 1, cleaning, drying, and grinding *Platycladus orientalis* leaves to obtain *Platycladus orientalis* leaf powder; Step 2, dissolving Sm(NO3)3·6H2O in deionized water to prepare a samarium salt solution, adding the *Platycladus orientalis* leaf powder to the samarium salt solution, stirring for 1 h, allowing it to stand and soak for 12 h, and then drying to obtain a samarium-supported *Platycladus orientalis* leaf powder precursor; Step 3, placing the samarium-supported *Platycladus orientalis* leaf powder precursor in a tube furnace, heating it to 500-700℃ at a heating rate of 5℃ / min under a protective gas atmosphere, pyrolyzing for 3-4 h, naturally cooling to room temperature, and then washing, drying, grinding, and sieving to obtain the samarium-modified biochar catalyst. The biochar catalyst prepared by this invention can efficiently and stably activate persulfate, thereby rapidly degrading amoxicillin in wastewater, and can be recycled multiple times. It has the advantages of low metal leaching rate and wide availability of raw materials.

The utility model relates to the technical field of medical instruments, in particular to an artificial valve clamping piece and a conveying system. The artificial valve clamping piece comprises a clamping piece body, a connecting wire and a traction structure, the clamping piece body comprises a pipe body and a plurality of through holes formed in the pipe body, the pipe body is in a wave shape, and the two ends of the pipe body are closed to form a ring shape; the connecting wire penetrates into the tube body, and the end part of the connecting wire penetrates through the through hole in the tube body and then is suitable for being connected with the artificial valve; the traction structure comprises a traction wire, the traction wire is arranged in the pipe body in a penetrating mode through a through hole in the pipe body, and the traction wire is suitable for being connected with a conveying system. The clamping piece is of a periodic wave-shaped or fluctuating annular structure, can be fixed to the periphery of the outer surface of the artificial valve, can be radially compressed and expanded according to the size of the internal artificial valve, and is matched with the artificial valve to clamp the autologous valve leaflet, so that the artificial valve can be stably anchored at an accurate position without displacement, and meanwhile, the clamping piece can be used for clamping the autologous valve leaflet. The clamping device can reduce the occurrence risk of perivalvular leakage.

This invention relates to the field of coal mine safety monitoring technology, and provides a device and method for monitoring the deformation of surrounding rock in roadways. The device includes an anchor rod, a pressure-bearing component, an anchor, an elastic constraint component, and a displacement measuring component. The anchor rod passes through an anchoring hole, and the anchor and pressure-bearing component are located on the anchor rod. The elastic constraint component is located on the outside of the anchor rod, and protrusions are arranged on its outer wall. In a first state, the elastic constraint component is wrapped around the outside of the anchor rod; in a second state, the constraint force is released. The displacement measuring component is connected to the elastic constraint component through a flexible connector. By integrating the elastic constraint component with the anchor rod in the anchoring hole, there is no need to drill additional monitoring holes, reducing construction difficulty and engineering costs, and improving installation efficiency. After the constraint is released, the elastic constraint component expands due to its own elastic restoring force, causing the protrusions to embed into the inner wall of the anchoring hole. The displacement measuring component measures the displacement of the elastic constraint component along the axial direction of the anchor rod, effectively reflecting the deformation of the surrounding rock.

The invention discloses a copper-silicon catalyst for plasma treatment as well as a preparation method and application of the copper-silicon catalyst. According to the method, a copper-silicon catalyst precursor prepared by a traditional ammonia distillation method is subjected to dielectric barrier discharge plasma treatment in the atmosphere of H2 / Ar and the like, and traditional high-temperature roasting and reduction processes are replaced. According to the method, efficient reduction and high dispersion of copper can be achieved at the room temperature, the Cu < + > / Cu0 proportion is regulated and controlled, and the strong interaction between metal and a carrier is enhanced. The catalyst is used in a reaction for preparing ethylene glycol through hydrogenation of dimethyl oxalate, the activity, selectivity and stability of the catalyst are higher than those of a traditional heat treatment catalyst, the dimethyl oxalate conversion rate reaches up to 100%, the ethylene glycol selectivity is larger than 97%, and the stability reaches 1000 h or above. The method is simple in process, low in energy consumption and environment-friendly, and has a wide industrial application prospect.

This invention belongs to the field of medical materials, specifically relating to a patterned bio-barrier membrane with self-adhesive function and its preparation method. The preparation method includes: dissolving the adhesive matrix in a buffer solution, then adding reactive amino acids and a stabilizer to obtain a first mixture; adding ethanol and a hydrophobic agent to the first mixture, and stirring under heating conditions to obtain a second mixture; adding a thickener, a calcium supplement, and a reinforcing agent to the second mixture, continuing stirring, and then adding a protein precipitation reagent to precipitate the mixture, obtaining a hydrogel; covering a collagen membrane with a patterned porous mold, and adding the hydrogel to allow it to flow into the pores and solidify. This invention achieves precise adhesive loading through patterned design, combining advantages such as simple operation, reliable fixation, good biocompatibility, and high osteogenic efficiency, effectively solving the barrier membrane fixation problem in GBR technology, and is suitable for bone defect treatment in dental implant prosthesis restoration.

The utility model discloses a kind of automobile wheel cover mudguards, it is related to automobile parts technical field, it includes mudguard body, mudguard body includes the base of n shape, the rear side of base is provided with cover body, the middle part of cover body is provided with gap part, and the upper end of gap part extends to base;The outer side of cover body is provided with sound-absorbing pad;The left end of base is bent to form flanging portion to left, the rim of flanging portion is provided with a plurality of first fastener, and a plurality of second fastener are provided on flanging portion.The utility model effectively solves the defects of prior art in the aspects of assembly efficiency, noise control and structural stability, realizes the comprehensive beneficial effects of reducing cost, improving environmental protection and durability.

The invention belongs to the technical field of fuel cell proton exchange membranes, and discloses a cross-linking type polybenzimidazole proton exchange membrane with oxidation resistance and high proton conductivity and a preparation method of the cross-linking type polybenzimidazole proton exchange membrane. According to the cross-linking type polybenzimidazole, after polymerization of raw material monomers is completed, a silane coupling agent is added as a cross-linking agent, and polybenzimidazole containing the cross-linking agent is obtained through reaction. The polybenzimidazole containing the cross-linking agent can be prepared into a cross-linking type polybenzimidazole proton exchange membrane by using a solution casting method. According to the cross-linked polybenzimidazole disclosed by the invention, a stable and uniform Si-O-Si cross-linked network is constructed by adding the cross-linking agent and taking a hydroxyl group on the polybenzimidazole as a main reaction site, so that synchronous improvement of antioxidant stability and proton conductivity is synergistically realized. The polybenzimidazole proton exchange membrane containing the cross-linking agent has a good application prospect in the aspect of proton exchange membrane fuel cells.

The invention discloses a ship engine methanol fuel supply pipeline detection device, and relates to the technical field of pipeline detection, the ship engine methanol fuel supply pipeline detection device comprises a cabinet, and the upper surface of the cabinet is fixedly provided with a panel. By arranging the case and the panel, a firm protective shell and a flat operation platform are provided for the whole detection device, the case is made of an anti-corrosion material so as to adapt to the marine environment, and the panel serves as an installation reference of each functional module; the spraying mechanism is used for rapidly injecting a detection solution into the methanol fuel supply pipeline, a first connecting frame is fixedly arranged on the outer surface of the spraying mechanism, and the first connecting frame is fixedly connected to the inner wall of the panel. By arranging the spraying mechanism and the first connecting frame, a high-pressure injection system of a detection solution is formed, the first connecting frame provides accurate mounting and positioning for the spraying mechanism, and the spraying mechanism is responsible for generating controllable pressure to quickly inject the detection solution into a to-be-detected pipeline, so that the effect of sealing and detecting a supply pipeline is achieved.

This invention relates to the field of metal oxide technology, specifically to a highly dispersed nano-gadolinium oxide and its preparation method. The preparation method includes: activating surface sites through weak acid etching, pulsed ultrasonic depolymerization, and hydrothermal re-hydroxylation; adsorption using a polycarboxylic acid chelating agent; introducing hydrophobic chains and tertiary amine groups through sequential amidation; forming a strongly hydrated outer layer through beet alkalization; and finally, ultrafiltration desalting and concentration. The nano-gadolinium oxide dispersion obtained by this method has advantages such as narrow particle size distribution, low viscosity, good storage stability, and strong electrolyte resistance, making it suitable for high-end applications such as polishing slurries and coating precursors.

A kind of steel roof eaves wind-resistant structure, it relates to steel roof technical field, including batten board, multiple self-tapping screws and sealing device.Self-tapping screw passes through the opening on batten board and is connected with eaves beam, and compacts roof board;The diameter of opening is larger than the major diameter of screw, and sealing device is arranged in it, including protective sleeve embedded in hole and sealing ring arranged between screw and protective sleeve, sealing ring is expanded and tightly holds screw when screw is compacted and compacts roof board, and sealing is realized.Ring-shaped gasket and its bottom boss, annular groove on screw, and bending protrusion on batten board are arranged.Sealing device is arranged in the inside of opening, and is less affected by ultraviolet rays, rain, temperature difference and the like, has long service life, and is easy to maintain.The utility model improves the wind resistance and long-term sealing stability of roof.

The offshore operation platform comprises a base station platform, a plurality of piles and spiral anchor pieces, each pile is movably arranged on the base station platform in the up-down direction and suitable for penetrating into a seabed to anchor the base station platform, each pile can rotate along the axis of the pile, and the spiral anchor pieces are arranged on the base station platform in the up-down direction and suitable for penetrating into the seabed to anchor the base station platform. The radial outer side of each pile column is connected with a spiral anchor piece, and the rotating direction of the spiral anchor piece on at least one pile column is opposite to the rotating direction of the spiral anchor pieces on the other pile columns. According to the offshore operation platform, when the piles are screwed into the seabed, the piles in different screwing directions rotate in the opposite directions, part of twisting force can be offset mutually, the piles can stably penetrate into the seabed downwards, soil around the piles is prevented from loosening due to large shaking of the piles, and the service life of the piles is prolonged. Therefore, the pile is reliably anchored to the seabed, and the reliability of the offshore operation platform is improved.

The invention provides a folding type container train top inspection ladder which comprises two foldable vertical rods, a plurality of transverse rods, a plurality of supporting rods and locking assemblies, the transverse rods are connected between the two vertical rods and arranged at equal intervals in the length direction of the vertical rods, and the supporting rods are connected to the same sides of the two vertical rods. The vertical rod comprises a first rod body and a second rod body which are hinged up and down, a fixing sleeve is arranged at the hinged position in a sliding mode, the top end of the first rod body is bent downwards to form an inverted-U-shaped handrail, the lower end of the handrail is connected with a rectangular hook protruding upwards, and the lower end of the second rod body on the right side extends downwards. One end of the lock rod is connected with the lock head through the mandrel, and the other end is connected with the right second rod extension section. The hanging device is firm in hanging and low in safety risk. The folding device is small and light after being folded, can be operated by one person, and is low in labor intensity and high in working efficiency.

The invention discloses a steel-concrete combined open-web type continuous rigid frame bridge structure which comprises a main pier and a transition pier or a bridge abutment, the main pier is divided into a lower pier column and an upper pier column, the lower pier column is of a double-limb structure, the upper pier column and the lower pier column are connected through a lower chord No.0 beam section, and the two longitudinal sides of the lower chord No.0 beam section extend out of the lower chord beam section. The lower chord beam section is divided into a plurality of small sections which are arranged in parallel with the upper chord beam section in the inclined upward direction; the upper pier column, the upper chord beam section and the lower chord beam section form a triangular hollow area; a vertical connecting column is connected between the upper chord beam section and the lower chord beam section; span beam sections are symmetrically arranged on the two longitudinal sides of the convergence node to form a balanced T-shaped structure which takes the main pier as a symmetry point and comprises an open web area; the adjacent main piers are connected through a main span closure section, and the main piers and the side span beam sections are connected through side span closure sections. According to the method, the bearing efficiency of the beam type bridge structure can be improved, the larger spanning capacity is achieved, the method is well connected with a traditional construction method, and implementation is convenient.

The application discloses a preparation method of hydrogenated aldehyde ketone resin without free formaldehyde, belongs to the technical field of aldehyde ketone resin synthesis, and aims to solve the technical problems of high free formaldehyde content, and further improved hydroxyl value stability and transparency in the hydrogenated aldehyde ketone resin in the prior art, and specifically comprises the following steps: under the protection of an inert gas atmosphere, phenylacetone, polyformaldehyde and a solvent are mixed and stirred, the reaction system is heated to 60-75 DEG C, and an inorganic alkali is added into the reaction system. The application is characterized in that the basic aldehyde ketone resin solution prepared by condensation of polyformaldehyde and phenylacetone in a water-free environment with a nickel catalyst is catalytically hydrogenated, not only the hydrogenated aldehyde ketone resin with stable hydroxyl value and extremely low colority is effectively obtained, but also the free formaldehyde content in the hydrogenated aldehyde ketone resin is effectively reduced, and the wide applicability of the hydrogenated aldehyde ketone resin in high-end coatings, adhesives and electronic materials is improved.

Provided is a valve implantation device with the assistance of a heart isolation device, which includes a valve, a heart isolation device, and a valve connection device, wherein the heart isolation device includes an isolation device body; the isolation device body is provided with a positioning part; the isolation device body is fixed on a heart tissue through the positioning part; the valve connection device includes a first connection part; one side of the first connection part is connected with the valve; the isolation device body is provided with a second connection part; and the first connection part and the second connection part are connected during use. The device of the present disclosure can improve the cardiac function before / during valve implantation and increases the effectiveness of an operation. Fixing the valve by the hook-type structure can reduce metal objects required for replacement and avoid potential injury to a heart valve structure. A connector structure connected to the valve stably locates the valve and accurately releases the height of the valve, so that paravalvular leak and injury to a valve annulus plane can be prevented.