69results about How to "Reduce Secondary Hazards" patented technology

The invention discloses a carrier rocket sub-stage falling area range control system. The carrier rocket sub-stage falling area range control system comprises a grid fin structure system, a grid fin control system, a grid fin telemetering system and a ground information receiving system. Under the condition that a control unit resolves the measurement information such as the posture, the positionand the speed, a servo mechanism is controlled to deflect the fin surface by sending an instruction, so that the posture of a sub-stage of a carrier rocket is stabilized, and the sub-stage is guided to fly to the target falling area for flying landing; and the telemetering system and the ground information receiving system are used for measuring and receiving the sub-stage reentry flight information, and the sub-stage state information is monitored in real time. According to the system, the flight control time sequence and procedures are integrated, so that the sysrem has the advantages that the modification amount of the carrier rocket is small, the loss of the carrying capacity is small, the flight safety of a main task of the carrier rocket is not affected, the sub-stage falling area range of the carrier rocket can be greatly reduced, and the sub-stage return information can be monitored in real time.

The invention relates to a graphene / layered double hydroxide composite flame retardant and a preparation method of a polystyrene nanometer flame-retardant composite material. The preparation method comprises the following steps of: dissolving a carbon nanotube into graphene oxide colloid; stirring and performing ultrasonic dispersion until the materials are dispersed uniformly; adding M<2+> salt and Al<3+> salt; adding urea; performing a reflux reaction to obtain a graphene / carbon nanotube / layered double hydroxide composite assembling body; mixing the composite assembling body and polystyrene resin; and performing melt extrusion to obtain the polystyrene nanometer flame-retardant composite material. The graphene / carbon nanotube / layered double hydroxide composite assembling body is prepared by dispersing carbon nanotubes by a graphene oxide nanosheet, controlling the pH value of the solution by the urea and reducing the graphene oxide into the graphene. The polystyrene nanometer flame-retardant composite material prepared by the melt extrusion method has excellent flame resistance and mechanical properties.

The invention discloses a reaction type phosphorus / nitrogen flame retardant, and its preparation method and application. A structure of the reaction type phosphorus / nitrogen flame retardant is shown in the formula (I). The preparation method of the reaction type phosphorus / nitrogen flame retardant comprises the following steps that: a phosphaspiro-containing amine compound shown in the formula (II) and a carboxylic acid halide shown in the formula (III) undergo a reaction or the phosphaspiro-containing amine compound shown in the formula (II) and a carboxylic acid shown in the formula (IV) undergo a reaction to obtain the reaction type phosphorus / nitrogen flame retardant. In the invention, a copolymer is produced from a reaction type phosphorus / nitrogen flame retardant and monomers and is utilized for modifying high-molecular materials in a fire retardant characteristic, and through synergistic effects of nitrogen and phosphorus elements in the phosphorus / nitrogen flame retardant, flame retardant effects of high-molecular materials adopting the phosphorus / nitrogen flame retardant can be improved, thus a usage amount of the phosphorus / nitrogen flame retardant in the high-molecular materials is decreased and a cost of the high-molecular materials with a flame retardant characteristic is reduced.

The invention discloses a flame retardant and a preparation method thereof, and flame-retardant acrylate emulsion employing the flame retardant, in particular a reactive phosphorus-nitrogen flame retardant, and a preparation method and application thereof. The reactive phosphorus-nitrogen flame retardant has the structure shown as a formula (I). The preparation method comprises the following step of: reacting amine compound containing phosphorus spiro, which is shown as a formula (II) with maleic anhydride to obtain the reactive phosphorus-nitrogen flame retardant. The flame-retardant acrylate emulsion is prepared by emulsion polymerization of the reactive phosphorus-nitrogen flame retardant and acrylate monomers. The reactive phosphorus-nitrogen flame retardant and the acrylate monomers form copolymer to perform flame-retardant modification on acrylate emulsion, and the flame-retardant effect of acrylate resin is improved, the using amount of the flame retardant in polymer materials is reduced and the cost of flame-retardant materials is reduced through synergic flame retardancy of phosphorus and nitrogen elements of the flame retardant.

The invention discloses a flame-retardant cotton fiber and a preparation method thereof. An intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating contains an intumescent flame retardant, polyvinyl alcohol and montmorillonoid. The intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating is prepared by adopting the following step of: carrying out layer-by-layer self-assembly on a polyvinyl alcohol aqueous solution with the intumescent flame retardant and montmorillonoid suspension liquid dispersed in water to obtain the intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating. The flame-retardant cotton fiber is obtained by treating the intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating. According to the flame-retardant cotton fiber and the preparation method thereof, the intumescent flame-retardant modified polyvinyl alcohol / montmorillonoid composite coating is prepared by the adoption of a layer-by-layer self-assembly technology; and through the synergistic flame-retardant effect of the intumescent flame retardant and montmorillonoid, the flame retardance of cotton fibers is improved, so that the usage amount of the flame retardant for cotton fabrics is reduced, therefore the cost of flame-retardant cotton fibers is lowered.

The invention relates to a flame retardant, in particular to a hydrotalcite composite flame retardant and a preparation method thereof. The structure of the hydrotalcite composite flame retardant is shown as a formula (I); in the formula (I), a stick represents hydrotalcite, a compound inserted between layers of the hydrotalcite is an intumescent flame retardant, and the mass content of the intumescent flame retardant is 5 to 30 percent. The flame retardant is halogen-free, good in flame retardant effect, wide in application scope and accordant to environmental requirements.

The invention relates to a flame retardant and particularly relates to a montmorillonite composite flame retardant and a preparation method thereof. The montmorillonite composite flame retardant has a structure as shown in the specification (I), wherein a stripped substance represents for montmorillonite, and a compound inserted to a montmorillonite layer is an intumescent flame retardant with the mass content of 3-30%. The intumescent flame retardant of the montmorillonite composite flame retardant is bonded with montmorillonite through ionic bonds. The montmorillonite composite flame retardant is suitable for modifying high-polymer materials of which the processing temperatures are within 300 DEG C. The flame retardant disclosed by the invention is free of halogens, good in flame-retardant effect, wide in application range and capable of meeting the requirement of environment protection.

The invention discloses a safety production integrated supervising platform based on a BIM technology. The safety production integrated supervising platform comprises a center system. The center system reads firefighting detecting data and video information in a plant through sensors and a camera connected and mounted in the plant or reads detecting data and video information of an original plantfirefighting system through a gateway. The center system is connected with a misinformation-preventing detecting system, and the misinformation-preventing detecting system detects the two or more types of sensors and meanwhile conducts alarming when receiving fire signals. The center system calculates the death boundary, the evacuation boundary, the evacuation route, the rescue route and the interlocking accident range according to real-time allowance data, and if hazardous articles exist in the interlocking accident range, the value after interlocking accident occurring serves as the final calculating value; and the center system is connected with a hazardous article vehicle route command system. According to the safety production integrated supervising platform, an existing firefightingsystem of an enterprise is integrally utilized, the firefighting evacuation range can be calculated accurately, and meanwhile the optimal operating route of a hazardous article transporting vehicle can be planned.

The invention discloses an intumescent flame-retardant modified polyacrylamide / graphene oxide composite coating, a preparation method and application thereof. The structure of an intumescent flame retardant is represented by a formula (I). The intumescent flame retardant is prepared by adopting the following step of: making diphenyl chlorophosphate react with acrylamine or acrylamine hydrochloride to obtain the intumescent flame retardant. The intumescent flame retardant is copolymerized with acrylamine monomer to obtain intumescent flame-retardant modified polyacrylamide. According to the invention, the intumescent flame-retardant modified polyacrylamide / graphene oxide composite coating is prepared through the adoption of a layer-by-layer self-assembly technology; and through the synergistic flame-retardant effect of the intumescent flame retardant and graphene oxide, the flame retardance of the composite coating is improved, so that the usage amount of the flame retardant coating on textile materials is reduced, therefore the cost of flame-retardant textiles is lowered.

The invention relates to a mine emergency wireless collection system and a collecting method based on remote distribution of a flying machine. The mine emergency wireless collection system comprises the flying machine, a front end collection part and a portable terminal, wherein the flying machine comprises a main air bag, a power device and a balancer. When emergency situation happens underground, the flying machine which is provided with the front end collection part is remotely controlled to a preset area for distributing, the front end collection part is used for collecting environment information of the temperature, the methane concentration and the oxygen concentration in the preset area, and data information can be transmitted to the portable terminal through a wireless way; the portable terminal is used for displaying, storing and analyzing and is used for evaluating whether rescue workers are suitable to enter into the preset area or not; the front end collection part can be distributed in the front preset area by the rescue workers by utilizing the flying machine, and the forward advancing can be gradually carried out until a catastrophe field is reached. According to the mine emergency wireless collection system and the collecting method, disclosed by the invention, the remote distribution of the front end collection part is carried out by utilizing the flying machine and is safe and reliable; the real-time data transmission is carried out by adopting the wireless way; and the environment safety situation can be quickly and efficiently evaluated by the portable terminal system.

The invention relates to the technical field of lifeline engineering, and specifically relates to a multi-dimensional seismic reduction and isolation device for a storage tank. The multi-dimensional seismic reduction and isolation device for the storage tank comprises a horizontal first-dimensional damping system, a horizontal second-dimensional damping system, a vertical damping system, an anti-torsion damping system, a circular guide rail system and a ball screw system, wherein the horizontal first-dimensional damping system and the horizontal second-dimensional damping system provide horizontal damping in two directions; and the vertical damping system and the anti-torsion damping system provide vertical damping and torsion damping separately. The device is capable of generating dampingin four directions, the damping is mutually independent and has no influence with each other, and in the case of a seism, the functions of seismic reduction and seismic isolation can be realized through the device in the horizontal direction and the vertical direction, and even with regard to a generated seismic force with a torsion quantity, so that damage to similar large LNG storage tanks in the multi-dimensional seism is greatly reduced, and the generated secondary hazards are reduced; and in addition, the device is convenient to install, simple to use, and free from special maintenance in a running process.

The invention relates to a foam extinguishing agent containing a biosurfactant and a preparation method for the foam extinguishing agent. The problems that an existing foam extinguishing agent is liable to pollute the environment and the preservation time is short are mainly solved. The foam extinguishing agent containing the biosurfactant comprises, by weight, 10%-30% of rhamnolipid, 3%-15% of sophorolipid, 0.1%-0.5% of a thickening agent, and the balance water. The preparation method for the foam extinguishing agent comprises the steps that under the stirring condition, the rhamnolipid is added into a certain amount of water, and after even stirring, the sophorolipid is added; after even mixing, the mixture is heated to 80 DEG C-90 DEG C in a reaction kettle; after the mixture is cooled to the room temperature, sodium alginate is dissolved with 10% of water and added to the reaction kettle; and the balance water is added as a complement, and the mixture is mixed evenly. According to the foam extinguishing agent containing the biosurfactant, the fire extinguishing performance of the extinguishing agent can be improved, fast biodegradation of pollutant in a place where a fire disaster occurs is achieved, and thus the environment is protected.

The invention relates to a flame retardant, in particular to intumescent flame retardant modified montmorillonite and a preparation method thereof. The structure of the intumescent flame retardant modified montmorillonite is shown in the formula (I) (in the description), wherein in the formula (I), the strip-shaped object refers to the montmorillonite, and the compound grafted onto the surface of the montmorillonite is an intumescent flame retardant. In the intumescent flame retardant modified montmorillonite, the intumescent flame retardant is connected with the montmorillonite through chemical bonds. The intumescent flame retardant modified montmorillonite is suitable for high polymer material modification with the processing temperature within 320 DEG C, and is insoluble in water and organic solvents.

The invention discloses a botany method for efficiently improving saline-alkali soil. The method comprises the following steps: (1) turning over the land, harrowing, laser-levelling, salt-leaching, and seeding in spring; (2) irrigating after 10-15 days of the seeding, from the end of the Chinese wildrye trefoil stage to the beginning of overwintering, determining whether to irrigate according to the practical situation; (3) from the next year after the seeding, performing the following operations every year: applying one time of a humic acid combined fertilizer every twenty days after the Chinese wildrye turns green, and immediately performing one time of the irrigation after applying the fertilizer; applying a nitrogenous fertilizer after harvesting a batch of the Chinese wildrye, and immediately irrigating; and from the green-turning of the Chinese wildrye to the beginning of overwintering, determining whether to irrigate according to the practical situation. The method for improving the saline-alkali soil by using the Chinese wildrye of China sciences group No.1 is simple, easy, efficient and economized. The method is promoted in the large area of the similar saline-alkali soil in the north of China, the saline-alkali soil can be rapidly improved, the good steppe ecology environment is recovered, the ecological benefits can be realized, and the better economic benefit and the social benefit can be obtained.

The invention discloses a method for predicting epileptic seizure earlier stages on the basis of EDM (empirical mode decomposition) and WPD (wavelet packet decomposition) feature fusion. The method includes steps of 1, dividing categories of EEG (electroencephalography) signals, cutting samples, carrying out empirical mode decomposition on each sample, analyzing first intrinsic mode functions obtained by means of decomposition, and extracting features on the basis of the FIMF (first intrinsic mode functions) from the first intrinsic mode functions; 2, carrying out four-layer wavelet packet decomposition on the first intrinsic mode functions obtained at the step 1 to obtain wavelet packet coefficients of 16 nodes of every last layer and extracting the skew, energy and features on the basisof FIMF-WPD from the wavelet packet coefficients; 3, fusing the features on the basis of the FIMF and the features on the basis of the FIMF-WPD and building epileptic seizure earlier stage predictionmodels for fused feature training classifiers by the aid of random forest algorithms. The features on the basis of the FIMF comprise energy, energy ratios and variance. The method has the advantages that time periods of the epileptic seizure earlier stages can be effectively warned by the aid of the method, and accordingly secondary injury on patients due to epileptic seizure can be reduced.

The invention relates to a flame-retardant sealing strip, in particular to a low-smoke halogen-free flame-retardant sealing strip and a method for preparing the same. The low-smoke halogen-free flame-retardant sealing strip comprises, by weight, 100 parts of ethylene propylene diene monomer rubber, 10-40 parts of naphthenic oil, 10-40 parts of carbon black, 5-20 parts of white carbon black, 5-40 parts of intumescent flame retardants, 5-25 parts of complex smoke suppressants, 0.5-1.5 parts of stearic acid, 1.0-3.5 parts of zinc oxide, 4.0-8.5 parts of sulfur, 2.0-4.5 parts of accelerators, 1.0-3.5 parts of vulcanization accelerators and 1.0-3.0 parts of anti-aging agents. The intumescent flame retardants are products prepared by means of ionic reaction on polyethylenimine and polyphosphoric acid. The low-smoke halogen-free flame-retardant sealing strip and the method have the advantages that the low-smoke halogen-free flame-retardant sealing strip is free of halogen, low in smoke, good in flame-retardant property and excellent in comprehensive performance, and the like.

The invention discloses a new energy centralized frequency correction control system and control method. The method comprises the steps of: obtaining fixed value information preset by an execution station, new energy grid-connected information, power grid operation information and actual response control quantity information; formulating a power grid frequency correction control measure accordingto the information and the acquired total load information of the power grid; and issuing the power grid frequency correction control measures to an execution station, and controlling the new energy inverter to adjust the power by the execution station. According to the invention, the rapid active power regulation capability of the new energy inverters is utilized, the frequency distribution characteristics of the power grid after serious faults and the difference control strategy of the new energy centralized frequency correction control for each new energy inverter are considered, and the refinement and reliability levels of the power grid frequency correction control are improved.

The invention belongs to the technical field of steel-concrete joint waterstop, particularly relates to a steel-concrete joint waterstop of a corrugated steel web plate composite girder bridge. The steel-concrete joint waterstop of the corrugated steel web plate composite girder bridge comprises corrugated steel web plates, a corrugated steel web plate composite girder concrete bottom plate and acorrugated steel web plate composite girder concrete top plate, wherein the upper and lower ends of the corrugated steel web plates are separately embedded between the opposite side walls of the corrugated steel web plate composite girder concrete bottom plate and the corrugated steel web plate composite girder concrete top plate. The steel-concrete joint waterstop is convenient to prefabricate, low requirements in site conditions, and is particularly suitable for field operations. According to the reserved grooves of the steel-concrete joint waterstops, secondary damage to the structure caused by grooving after the completion of construction of the corrugated steel web plate bottom plate and web plates is reduced, and rainwater is prevented from eroding the joint by sequentially adheringa putty composite rubber sealing strip, a water-swellable rubber sealing strip and a ethylene-propylene-diene monomer sealing rubber strip from top to bottom to form a tight joint with the corrugatedsteel web plates and the concrete bottom plate.

The invention relates to a fire retardant, particularly to a phosphorus-nitrogen compound modified montmorillonite fire retardant and a preparation method thereof. The phosphorus-nitrogen compound modified montmorillonite fire retardant is prepared through the following method comprising the following steps: reacting an amido-containing silane coupling agent with montmorillonite, so as to obtain silane coupling agent modified montmorillonite; then, reacting the silane coupling agent modified montmorillonite with 2-oxo-2-chlorine-5,5-dimethyl-1,3,2-dioxaphosphorinane, so as to obtain the phosphorus-nitrogen compound modified montmorillonite fire retardant. According to the fire retardant disclosed by the invention, montmorillonite is chemically modified by using a phosphorus-nitrogen compound, so that the dispersity of montmorillonite in polymers is improved, and the problem that the mechanical property of high polymer materials is damaged due to the situation that a fire retardant is added is solved; the fire retardant disclosed by the invention is wide in application range, good in fire retardant effect and stable in property; the fire retardant disclosed by the invention is easy and convenient to operate in preparation process and low in cost, the solvent is convenient to recycle, and the obtained product is easy to separate and industrialize.

The invention discloses a preparation method of intumescent flame-retardant polyurethane in the technical field of high polymer materials. The preparation method of the intumescent flame-retardant polyurethane is characterized by comprising the following steps: preparing materials, polyether triol, polyoxyethylene glycol, a foaming agent urea, a foaming agent carbonic acid organic alcohol amine salt, potassium ethylhexanoate, dibutyl dilaurate, a foam stabilizer, a copolymerization monomer flame retardant, nano aluminum hydroxide, ammonium octamolybdate and a plurality of parts of isocyanate,and stirring and dispersing: adding polyether triol, polyoxyethylene glycol, a foaming agent urea, a foaming agent carbonic acid organic alcohol amine salt, potassium 2-ethylhexanoate, dibutyl dilaurate, a foam stabilizer, a copolymerization monomer flame retardant, nano aluminum hydroxide and ammonium octamolybdate into a dispersing machine. The invention effectively solves the problems of dispersity and compatibility of the organic flame retardant in the polyurethane resin, enhances the flame-retardant efficiency of the flame retardant, and enhances the mechanical properties of the polyurethane foam plastic.

The invention relates to an oligosaccharide preservative for inhibiting fruit softening and reducing mechanical damage harm. The oligosaccharide preservative is prepared by the following steps of inducing one kind or a plurality of kinds of microbes by a 25-percent (w / w) apple pomace composite culture medium to produce a fruit cell wall polysaccharide hydrolase composition through fermentation; treating specific apple pomace wastes by the hydrolase composition under the condition of 10 to 50 DEG C; then, adding 95-percent ethyl alcohol; performing overnight aging under the condition of 4 DEG C; and performing distillation rotation or vacuum freezing concentration after centrifugation to obtain a target preservative. The mass concentration of a product is not lower than 4 percent. After thepreservative is used, the fruit softening can be obviously inhibited. The inhibition rate of the tomato fruit softening reaches 65 percent. Meanwhile, the formation of soluble solids is retarded. Theretarding efficiency is 15 percent to 35 percent according to different storage periods. In addition, after the preservative is used, the self healing capability of the wound of the fruit can be accelerated; the fruit mechanical damage is directly or indirectly reduced; and the shelf life of the fruit is prolonged.

The invention discloses compound phosphorus-nitrogen series flame-retardant polyamide and a preparation method thereof. According to key points of the technical scheme, the compound phosphorus-nitrogen series flame-retardant polyamide is composed of the following components in parts by weight: 60.2-80.1 parts of PA resin, 0.1-0.3 part of liquid oil, 5-15 parts of melamine cyanurate, 5-15 parts of a phosphorus-nitrogen series flame retardant A, 1-3 parts of a phosphorus-nitrogen series flame retardant B, 2-4 parts of a phosphorus-nitrogen series flame retardant C, 0.3-1 part of metal chloride, 0.2-0.5 part of an antioxidant and 0.5-1 part of a lubricating agent. According to the compound phosphorus-nitrogen series flame-retardant polyamide disclosed by the invention, the ignition temperature of glowing filaments of the MCA system is improved, so that the temperature is higher than 750 DEG C, and the flame-retardant effect is greatly improved.

The invention discloses an electromagnetic tire anti-prick device which comprises a signal acquisition device, a signal conversion device and a suction head device, wherein the signal acquisition device comprises a vehicle speed extraction module; the signal conversion device comprises a single-chip microcomputer and a power source; the suction head device comprises a potential device, a sucker-type electromagnetic suction head and a weakly magnetic accommodating groove; the sucker-type electromagnetic suction head is connected with the potential device, and is arranged in an inclined manner; the weakly magnetic accommodating groove is formed in the lower end of the sucker-type electromagnetic suction head; the vehicle speed extraction module, the potential device and the weakly magnetic accommodating groove are connected with the single chip microcomputer; the vehicle speed extraction module is used for collecting the vehicle speed data of a vehicle and transmitting the data to the single chip microcomputer; the single chip microcomputer is used for controlling initial voltage output to the potential device according to the received vehicle speed data. The electromagnetic tire anti-prick device has the advantages that the suction force of the sucker-type electromagnetic suction head can increase with the increase of the vehicle speed of the vehicle; the potential device is used for boosting, so that the anti-prick effect under high-speed driving of the vehicle can be improved.

The invention discloses a printing technology for simulating the cigarette package special paper effect, and belongs to the technical field of printing. The technology comprises the following steps that a printed material (paper) is selected, six-color UV special-color offset printing is conducted on the surface of the printed material, the first-time silk-screen of marble printing ink is conducted after offset printing, second-time silk-screen of fine and transparent snowflake printing ink is conducted, the fine and transparent snowflake printing ink is stacked on the marble printing ink in the first-time silk-screen on the spot, and the volatile organic compound detecting procedure is conducted. The processing effect of the technology is more fine and attractive than that of a traditional technology, treatment of other images and texts of the designed effect is not affected, the overall package is abundant in level, prominent in topic and intense in contrast, the need for the technology design of various high-grade products can be met, and the printing technology is suitable for large-batch production. Cost is lower than the cost of special paper, the yield is high, and more importantly, the problem that VOC and other hazardous substances of multiple kinds of special paper exceed the standard can be perfectly solved.

The invention discloses a mineral multicolor stone-like coating and application thereof. The mineral multicolor stone-like coating comprises the following components in parts by weight: 3-12 parts ofmulticolor particles, 15-60 parts of multicolor coating adhesive, 0.5-1 part of stabilizer, 0.5-1 part of functional aid and the balance of deionized water. According to the invention, an inorganic mineral material and special resin synthetic solution is used as a binding material (continuous phase) of a colorful stone-like system, and based on a series of advantages and characteristics of a mineral binder, some problems of organic resin colorful coatings are solved. Therefore, the stone-like coating has good compatibility with a building cementitious base material, strong binding force, no yellowing, no discoloration, hydrophobicity, air permeability, no after-tack of a coating layer and better anti-aging performance, and the defect that organic colorful stone-like coatings are easy to generate is effectively improved. In the coating, ultrathin soft rock slices with good acid and alkali resistance are selected as stone-like pattern spots, so that the problem of discoloration of colorful spots is better solved.

The invention discloses a flame-retardant EPDM foaming thermal insulation material and a preparation method thereof. The method comprises the following steps of adding EPDM, naphthenic oil, carbon black, intumescent flame retardant microparticles, modified hydrotalcite, 5-15 parts of nano silicon dioxide, a vulcanizing agent Luperox F40P-SP210, an overspeed vulcanization accelerator SE-2, nano zinc oxide, zinc stearate, stearic acid, a foaming agent H and an antioxidant BHT into an internal mixer for mixing for 8-12 minutes, adding a vulcanizing agent Luperox F40P-SP210 and an overspeed vulcanization accelerator SE-2 into an internal mixer, mixing for 3-5 minutes, discharging to obtain EPDM mixed rubber, and vulcanizing and foaming the obtained EPDM mixed rubber in a press vulcanizer to obtain the flame-retardant EPDM foaming thermal insulation material. The flame-retardant EPDM foaming thermal insulation material and the preparation method thereof have the advantages that the flame-retardant performance is good, and the mechanical strength is high.

The invention discloses a reaction type phosphorus / nitrogen flame retardant, and its preparation method and application. A structure of the reaction type phosphorus / nitrogen flame retardant is shown in the formula (I). The preparation method of the reaction type phosphorus / nitrogen flame retardant comprises the following steps that: a phosphaspiro-containing amine compound shown in the formula (II) and a carboxylic acid halide shown in the formula (III) undergo a reaction or the phosphaspiro-containing amine compound shown in the formula (II) and a carboxylic acid shown in the formula (IV) undergo a reaction to obtain the reaction type phosphorus / nitrogen flame retardant. In the invention, a copolymer is produced from a reaction type phosphorus / nitrogen flame retardant and monomers and is utilized for modifying high-molecular materials in a fire retardant characteristic, and through synergistic effects of nitrogen and phosphorus elements in the phosphorus / nitrogen flame retardant, flame retardant effects of high-molecular materials adopting the phosphorus / nitrogen flame retardant can be improved, thus a usage amount of the phosphorus / nitrogen flame retardant in the high-molecular materials is decreased and a cost of the high-molecular materials with a flame retardant characteristic is reduced.

The invention discloses a phosphorus-nitrogen quaternary ammonium as well as a preparation method and application thereof. The phosphorus-nitrogen quaternary ammonium has a structure shown in the formula (I) and is prepared by the following steps: volution-contained phosphoryl chloride shown in the formula (II) is reacted with diamine compound shown in the formula (III) to obtain a compound shownin the formula (IV); the compound shown in the formula (IV) is reacted with acyl halide shown in the formula (V) to obtain a compound shown in the formula (VI); and the compound shown in the formula (VI) is reacted with tertiary amine shown in the formula (VII) to obtain the product, i.e. the phosphorus-nitrogen quaternary ammonium. The invention is used for chemically modifying montmrillonoid byusing the phosphorus-nitrogen quaternary ammonium, improves the inflaming retarding effect to high polymer materials through the cooperative inflaming retarding function of the montmrillonoid and phosphorus-nitrogen fire retardant, reduces the consumption of the fire retardant in the high polymer materials and lowers the cost of fire-retarding materials.

The invention discloses a novel composite UHPC projectile-resistant layer capable of resisting repeated attacks. The composite projectile-resistant layer is composed of three different UHPC structurallayers, wherein the top layer is a corundum sphere steel bar UHPC structure; the middle layer is a steel pipe UHPC dense arrangement structure; and the bottom layer is a UHPC air interlayer structure. The novel composite UHPC projectile-resistant layer has the three different efficiently-protective UHPC structures, and comprehensively reduces the catastrophic damage caused by war. Multilayer corundum spheres in the top layer can enable projectile fragments to continuously deflect so as to reduce the speed and destructive power of the projectile fragments and change original trajectories. Dense plum-shaped steel pipe UHPC in the middle layer provides continuous resistance, so that the projectile fragments continue to slow down and even stay in steel pipes. The UHPC air interlayer structurein the bottom layer diffuses blast waves carried by the projectile fragments or nuclear explosion while providing partial resistance so as to achieve the effect of reducing secondary hazards.

The invention relates to a self-repairing concrete anti-collision wall. The self-repairing concrete anti-collision wall comprises an anti-collision block and a self-repairing assembly installed in theanti-collision block. The self-repairing assembly comprises a glass tube, a polyurethane repairing agent located in the glass tube and a sensor installed on the glass tube; a current generator is arranged in the sensor; the sensor is in signal connection with the current generator; the output end of the current generator is connected with the glass tube; the glass tube is provided with an agent injection port and epoxy resin; the epoxy resin is located at the agent injection port; the epoxy resin and the glass tube form a closed cavity; and the polyurethane repairing agent is injected into aclosed cavity from the epoxy resin at the agent injection port. The anti-collision wall can be automatically repaired when damaged, the service life of the anti-collision wall is prolonged, the maintenance cost of the anti-collision wall is reduced, and the anti-collision wall belongs to the technical field of anti-collision walls.