96results about How to "Resist damage" patented technology

The invention discloses a carbon ceramic composite conductive microsphere, a ceramic resistor and a preparation method, and belongs to the technical field of production of special materials of electrical equipment, and the method comprises the following steps: sequentially dipping porous mullite in a precursor solution of carbon and slurry containing carbon black, and carrying out drying treatment and carbon burying sintering to obtain the carbon ceramic composite conductive microsphere; the preparation method comprises the following steps: preparing a ceramic raw material, performing vacuum-assisted centrifugal impregnation on the ceramic raw material and slurry consisting of a binder in pug consisting of the ceramic raw material and a surfactant, sequentially performing drying and glue discharging treatment, primary isostatic pressing forming and air pressure sintering, cooling to room temperature, and performing mechanical treatment and electrode spraying to obtain the ceramic resistor. Impregnation improves the dispersibility and uniformity of the carbon material in the porous mullite to form a continuous conductive path, the carbon black-containing slurry improves the conductivity of the ceramic resistor, carbon-buried sintering generates in-situ carbon with abundant types, the combination of carbon and a ceramic interface is promoted, and the oxidation resistance, mechanical properties and electrical properties of the ceramic resistor are improved.

The invention relates to a self-repairing invisible car cover and a preparation method thereof, and relates to the technical field of automobile material processing, and the self-repairing invisible car cover comprises the following components in parts by mass: 20-40 parts of fluorine-containing polyol, 15-30 parts of polyisocyanate, 5-10 parts of a composite chain extender, 10-20 parts of self-repairing microcapsules, 1-3 parts of an initiator and 30-50 parts of a solvent. The preparation method comprises the following steps: preparing a self-repairing coating; coating the surface of the transparent substrate with an adhesive to obtain an adhesive layer, and covering the adhesive layer with a release film to obtain a semi-finished automobile cover; and the self-repairing coating is applied to the face, away from the release film, of the semi-finished automobile cover, heating and curing are conducted, the semi-finished automobile cover with a self-repairing coating is obtained, the self-repairing coating is coated with a protective film, and the self-repairing invisible automobile cover is obtained after curing. The automobile cover has the effect of improving the self-repairing performance of the automobile cover, and the automobile cover has good weather resistance, tensile resistance and puncture resistance.

The utility model relates to the technical field of composite pipes, and discloses a steel curtain rope belt reinforced polyethylene high-pressure wear-resistant composite pipe for water delivery, which comprises a wear-resistant layer, the wear-resistant layer is made of high-molecular polyethylene materials, a structural layer is adhered to the outer surface of the wear-resistant layer, the structural layer adopts a 100-grade polyethylene core pipe, a reinforcing layer is adhered to the outer surface of the structural layer, and the steel curtain rope belt reinforced polyethylene high-pressure wear-resistant composite pipe is arranged on the outer surface of the reinforcing layer. An outer layer is extruded on the outer surface of the reinforcing layer through hot melting, the outer layer is made of a 100-grade polyethylene material, the outer surface of the outer layer is covered with an outer protective layer through extrusion, and the outer protective layer is made of a polypropylene material. According to the utility model, through the arrangement of the wear-resistant layer, the enhancement layer and the outer protective layer, the pressure resistance of the pipeline can be effectively improved to resist the damage of a water hammer, so that the reliability and the wear resistance of the pipe are improved, and the structural layer is protected from being corroded by sunlight ultraviolet rays by sacrificing the outer protective layer, so that the pipeline can adapt to various environments; the service life of the composite pipe is prolonged, so that the replacement frequency is reduced and the cost is reduced.

The invention discloses a method for preparing a metal casting mold based on steel grit 3D printing, and belongs to the technical field of metal casting mold machining. In order to solve the technical problem that in the prior art, the mechanical strength and collapsibility of a metal casting mold need to be further improved, the method for preparing the metal casting mold based on steel grit 3D printing comprises the following steps that a sand mold three-dimensional model is established according to a metal casting, then casting mold steel grit is filled in an operation box of sand mold 3D printing equipment, and the casting mold steel grit is obtained; the binder storage tank is filled with a binder; and according to the section formation of the sand mold three-dimensional model, a sand paving system of the sand mold 3D printing equipment paves cast steel sand on a printing platform. The casting steel sand and the binder are matched with each other, the metal casting mold blank is prepared through 3D printing and then dried, the normal-temperature mechanical property and high-temperature property of the metal casting mold are effectively improved, the application range of the metal casting mold is widened, and meanwhile the collapsibility of the metal casting mold is improved.

The utility model discloses a fluoroplastic insulating high-temperature-resistant fireproof cable, which comprises a cable core, the cable core comprises eight wire cores which are annularly distributed at equal intervals, each wire core is composed of an inner sheath and a conductor, a composite insulating outer layer is wrapped outside the cable core, the composite insulating outer layer is composed of a contact layer, a buffer layer and a reinforcing layer, and the contact layer is wrapped outside the buffer layer. A composite high-temperature-resistant layer is arranged outside the composite insulating outer layer, the composite high-temperature-resistant layer is composed of a high-temperature-resistant base material, a heat reflecting layer and a heat-resistant protective layer, and the composite high-temperature-resistant layer is wrapped with an outer sheath. The problems of cable stability, flame-retardant and fireproof performance, electrical performance, chemical corrosion resistance and large-current transmission capability in a high-temperature environment are solved.

The invention relates to an intelligent photovoltaic curtain wall which has the function of adjusting light transmission intensity. The surface of the photovoltaic curtain wall is fully covered by the photovoltaic module, the supporting body is installed behind the photovoltaic battery module, and the photovoltaic module is fixed on the supporting body through the module fastener. Air hole channels are arranged among the photovoltaic modules to adjust temperature, and air holes can be connected with external constant-temperature systems such as a central air conditioner, so that the photovoltaic curtain wall has good constant-temperature capability. The photovoltaic cell is located between the guide rails, and the controller controls the driving motor to achieve movement of the cell position, so that the light transmission intensity is adjusted in good time. A mechanical arm and a control motor are arranged in the photovoltaic cell storage box and used for storage and output of photovoltaic cells, and the control motor receives instructions of the controller to operate. The controller is connected with the driving motor and the control motor through data lines, the shielding area ratio of the photovoltaic cell is automatically adjusted according to user requirements, and automatic adjustment of the light transmission intensity is achieved.

The invention provides a preparation method of alumina aerogel, and belongs to the field of aerogel. The method comprises the following steps: modifying industrial aluminum hydroxide, so that the industrial aluminum hydroxide is subjected to crystal form transformation; mixing the modified industrial aluminum hydroxide with a solvent to obtain first slurry; adjusting the pH value of the first slurry to a set pH value; performing hydrothermal treatment on the first slurry with a set pH value to obtain second slurry; adjusting the solid content of the second slurry to a set solid content; aluminum salt is added into the second slurry with the set solid content, and third slurry is obtained; sequentially freezing and freeze-drying the third slurry to obtain a frozen compound; the frozen compound is sequentially subjected to first heating in a non-oxidizing atmosphere and second heating in an oxidizing atmosphere, and the aluminum oxide aerogel is obtained. Therefore, the invention provides a novel preparation method of the aluminum oxide aerogel.

The invention relates to the related technical field of transformers, in particular to a distribution line alternating current ice melting expansion type voltage regulating device which comprises a transformer, a cooling mechanism is arranged on the surface of one side of the transformer, a fixing mechanism is arranged on the upper surface of the transformer, and a protection mechanism is arranged on the upper surface of the transformer. And a high-voltage terminal is fixedly mounted on the upper surface of the transformer. According to the alternating current ice melting expansion type voltage regulating device for the power distribution line, the corrugated radiator is made of a special material and has excellent heat dissipation performance, and heat dissipation holes in the surface of the corrugated radiator enable air circulation to be smoother, so that heat dissipation efficiency is improved; cooling liquid in the water tank is circularly conveyed to the corrugated radiator through the cooling pipe, heat is absorbed and taken away through flowing of the cooling liquid, then the heat flows back to the water tank through the water conveying pipe for cooling circulation, and a complete heat dissipation system is formed.

The utility model relates to the field of soles, and discloses a multifunctional EVA / rubber combined sole which comprises an insole, a transverse groove is formed in the half sole position of the bottom of the insole in a penetrating mode, dotted lines are evenly distributed in the heel position of the bottom of the insole in a penetrating mode, an insole is arranged at the bottom of the insole, and an outsole is fixedly connected to the bottom of the insole. An anti-skid mechanism is arranged at the bottom of the outsole and comprises a grounding assembly and V-shaped grooves, the V-shaped grooves penetrate through the outsole and are formed in the two sides of the middle waist position of the outsole, and brake anti-skid grooves penetrate through the half sole and the heel of the bottom of the outsole and are formed in the half sole and the heel of the bottom of the outsole. According to the anti-skidding shoe, through linkage among the outsole, the rubber anti-skidding blocks, the rubber ground nail blocks, the V-shaped grooves, the brake anti-skidding grooves and the net-shaped lines, the contact area of the outsole and the ground is enlarged, the road holding force of the shoe is enhanced, the anti-skidding function is achieved, and the shoe can be stably worn on the outdoor severe ground.

The invention discloses an application of CXCL11 as an antiviral drug, relates to the field of biological medicines, and in particular relates to a protein of an antiviral drug, and the protein as the antiviral drug can inhibit infection and replication of RSV (Respiratory Syndrome Virus). The invention also provides a technical enlightenment for taking a related host protein in a virus infection pathway as an antiviral drug research target, and an application related indication of the CXCL11 protein analogue to clinical symptoms and / or clinical indications caused by severe respiratory syncytial virus infection. The invention further provides an administration route of the CXCL11 serving as an antiviral drug, a dosage range of drug intervention and the like, and finally, the feasibility of the CXCL11 serving as the antiviral drug is further verified through drug intervention application after drug challenge in CXCL11 <- / -> mice.

The invention discloses a natto peptide sea cucumber polysaccharide liposome for synergistically improving cardiovascular health and a preparation method and application thereof, belongs to the field of active peptide delivery systems, and aims to solve the stability problem of natto oligopeptide in gastrointestinal digestive tracts. The phytosterol and the vitamin E are filled between phospholipid double layers of the liposome to support a gap between the phospholipid double layers, and the ratio of the phytosterol to the vitamin E is (1-3): 1, so that the natto oligopeptide liposome has the effects that the storage of the natto oligopeptide and the stability of the natto oligopeptide in gastrointestinal and digestive tracts can be improved, the bioavailability of the natto oligopeptide liposome is improved, and the bioavailability of the natto oligopeptide liposome is improved. The traditional Chinese medicine composition has synergistic effects in the aspects of anticoagulation, thrombolysis and blood fat reduction, and has a good cardiovascular protection effect.

The invention relates to the technical field of fabricated building walls, and discloses a fabricated building sound insulation and heat preservation wall which comprises a foundation wall. A plurality of keels are installed at the top end of a foundation wall at equal intervals through expansion bolts, the top ends of all the keels are detachably connected with wall assemblies, and positioning assemblies are arranged in all the keels and used for installing the wall assemblies. The wall body assembly comprises a wall A, a wall B, a wall C and a wall D, the wall A, the wall B, the wall C and the wall D are sequentially spliced and combined to form the wall body assembly, and clamping assemblies are arranged at the joints of the wall A, the wall B, the wall C and the wall D; by arranging the arc-shaped grooves and the arc-shaped blocks, the wall A, the wall B, the wall C and the wall D are matched with one another in size, so that the wall body assembly is suitable for installation of base walls of various sizes, the assembly efficiency of workers on a construction site is improved, gaps between the wall bodies are connected more tightly, and under the action of the positioning assembly and the supporting assembly, the wall bodies can be conveniently and rapidly installed. And the wall body assembly and the foundation wall can be conveniently and rapidly installed by workers.

According to the probiotic composition and the application of the probiotic composition in preparation of products for preventing and treating vagina inflammation, the probiotic composition composed of lactobacillus gasseri B13.52 and lactobacillus mucus B14.46 screened from vaginal secretion of healthy women can effectively inhibit growth of escherichia coli, gardnerella and prevotella; the secretion of proinflammatory factors in vaginal epithelial cells can be obviously reduced, so that an anti-inflammatory effect is achieved.

The invention discloses an application of engineered citrobacter freundii in fermentation synthesis of a stable body. The engineered citrobacter freundii is citrobacter freundii overexpressing a polyphosphate kinase gene Ppk1. The stable body prepared by fermenting the engineered citrobacter freundii is rich in polyphosphates and polyamines, particularly, the content of the polyamines can be up to 21wt%, the polyphosphates in the stable body can store the polyamines in an ionic bond combination mode, the combined polyamines are insoluble in water, a natural anion coating is generated, and the stability of the stable body is improved. And the sustained-release tablet is not easily taken by intestinal epithelial cells, so that the sustained-release tablet has a certain sustained-release effect. The medicine prepared by taking the compound as a main active ingredient shows a remarkable curative effect in ulcerative colitis treatment, has the comprehensive effects of reducing oxidative stress, enhancing the anti-inflammatory ability of a body and regulating immunity, is suitable for patients of all ages, and has outstanding application value and market prospect.

The invention discloses a biodegradable composite polylactic acid packaging bag and a preparation method thereof, belongs to the technical field of biodegradable materials, and aims to solve the technical problem that the mechanical property, heat resistance and biodegradation rate of a polylactic acid material in the prior art need to be further improved. The material comprises the following components in parts by weight: 90-100 parts of modified polylactic acid, 10-15 parts of modified starch, 15-20 parts of modified nanofiber, 4-8 parts of pigment and 5-7 parts of additive, and is prepared by taking the modified polylactic acid as a basic raw material, the modified starch and the modified nanofiber as reinforcing materials and the pigment and the additive as auxiliary additives. The mechanical strength and high temperature resistance of the packaging bag are effectively improved, and the biodegradability of the packaging bag is improved, so that the packaging bag better meets the requirements of express and logistics industries on biodegradable packaging materials.

The invention relates to a preparation method of a toughened polylactic acid composite material based on an interfacial compatibilization effect, which is characterized in that an in-situ compatibilizer is prepared through molecular structure design based on chemical interaction between an active functional group of a grafting agent and a double bond on an ethylene propylene rubber molecular chain; the in-situ compatibilizer is used for improving the binding power between the polylactic acid and the ethylene propylene diene monomer, so that the two-phase interface compatibility is improved; a unique stereocomplex crystal structure of polylactic acid is further introduced into the system, and the two-phase dispersion state is improved by virtue of regulation and control and crystallization induction effects of stereomicrocrystals on a two-phase interface, so that the toughened polylactic acid composite material is prepared; by optimizing the content of an in-situ compatibilizer and a stereocrystal, a processing technology and other methods, formation of composite materials with different phase morphologies is induced, different modification and toughening effects are achieved, and the high-toughness polylactic acid composite material is prepared.

The present invention provides an organic compound, a mixture, a composition, a light extraction layer material and an organic electronic device. The structure of the organic compound is shown in the general formula (1), and the organic compound can be used as a light extraction layer material in an organic electroluminescent device to improve the light extraction efficiency of the device.

The invention discloses a photovoltaic adhesive film with low shrinkage and a preparation method thereof, and belongs to the technical field of photovoltaic film adhesive preparation. The photovoltaic adhesive film with low shrinkage is composed of the following components in parts by weight: 15-18 parts of ethylene-acrylic acid copolymer, 35-42 parts of ethylene-vinyl acetate copolymer, 1.5-1.8 parts of cross-linking agent, 0.7-1.3 parts of silane coupling agent, 1.1-2.7 parts of composite light stabilizer, 1.2-2.4 parts of composite modifier, wherein the composite light stabilizer is prepared by morpholine dichloride, N-butyl-2,2,6,6-tetramethyl-4-piperidinamine, N-(4-aminophenyl) maleimide and tetrakis (3-mercaptobutyric acid) pentaerythritol ester, and the composite modifier is prepared by dimethylaminoethyl methacrylate, azobisisoheptonitrile, 4-cyano-4-(thiobenzoylthio) valeric acid. The prepared photovoltaic adhesive film has low shrinkage, excellent aging resistance and mechanical properties.

The invention provides a composite material pipeline capable of preventing hydrogen leakage, and belongs to the technical field of pipeline preparation. The composite material pipeline comprises an inner pipe layer, a composite gas barrier layer located on the outer surface of the inner pipe layer, a high-temperature-resistant copolymer layer located on the outer surface of the composite gas barrier layer, a reinforcing layer located on the outer surface of the high-temperature-resistant copolymer layer and a corrosion-resistant polymer protection layer located on the outer surface of the reinforcing layer. The composite gas barrier layer is of a multi-layer co-extrusion molding structure and comprises a blending modified PVDC layer, a blending modified EVOH layer and a blending modified PA layer from inside to outside. By means of the multi-layer composite structure, excellent material selection and an optimized production process, the composite material pipeline for preventing hydrogen leakage has the characteristics of excellent gas blocking performance, high strength, corrosion resistance, high temperature resistance, good flexibility and the like, and can effectively solve the problems of hydrogen embrittlement, leakage and corrosion of a traditional steel pipe in the hydrogen conveying process; the method has remarkable technical advantages and wide application prospects.

The utility model discloses a high-temperature-resistant anti-drop anti-counterfeit label, which comprises backing paper, an anti-counterfeit label body, a protective layer, a first heat-resistant layer, a first sticking area and a second sticking area, the anti-counterfeit label body is stuck on the backing paper, a wear-resistant layer and the protective layer are arranged on one side of the anti-counterfeit label body, and the protective layer is arranged on the other side of the anti-counterfeit label body. And a first sticking area and a second sticking area are arranged on the bottom surface of the second heat-resistant layer. Through the arrangement of the first heat insulation layer, the heat dissipation layer and the second heat insulation layer, the influence of external high temperature on electronic elements in the label can be effectively reduced through the arrangement of the two heat insulation layers, the electronic elements are prevented from being damaged or losing efficacy due to overheating, heat generated in the label can be rapidly dissipated out through the heat dissipation layer, and the heat dissipation effect is good. The heat is prevented from being accumulated in the label, so that the anti-counterfeit label can better resist the behavior that a counterfeiter destroys or tampers the anti-counterfeit information by means of high temperature and the like, the safety and the reliability of the anti-counterfeit label are effectively improved, and the anti-counterfeit effect is improved.

The utility model relates to the technical field of building engineering, especially a kind of rockfill concrete less layered pouring device, the less layered pouring device is hollow columnar structure, and the hollow part of columnar structure is used to accommodate the delivery pump pipe of concrete slurry;The side wall of columnar structure is the grid structure formed by the intersection of several reinforcing steels, and the coarse aggregate of the maximum particle size in concrete slurry can pass through any grid in the grid structure.The utility model can pour concrete from the bottom of each layer, ensure pouring efficiency while reducing the number of layered layers, improve the integrity of rockfill concrete.

The invention belongs to the technical field of PPVC modular buildings, and particularly relates to application of alkali-activated concrete in the aspect of PPVC modular buildings. The anti-seismic performance of the module body is improved by reasonably configuring the application position of alkali-activated concrete in the module body, and improvement of the anti-seismic performance of the module body is achieved through three ways, one way is that the module body is made to be of a low-gravity-center structure, and due to the fact that the gravity center is lower, the module body is more capable of keeping stable in earthquake disasters; according to the other mode, the module body is provided with a damping shock absorption mechanism through constraint of an alkali-activated concrete structure, the low-gravity-center structural feature of the module body is strengthened while shock absorption is conducted, the vertically-adjacent module bodies can be firmly connected, the shock absorption capacity is achieved, and damage caused by earthquakes is resisted; and finally, a connecting structure using alkali-activated concrete is arranged between the module bodies, the connecting structure has the shock absorption and energy consumption effects under the constraint of the alkali-activated concrete, and the shock resistance of the module bodies is further improved.

The utility model relates to the technical field of labor protection appliances, in particular to a pair of labor protection shoes with an instep anti-smashing function. According to the technical scheme, each shoe comprises a protective cloth, a vamp and a sole, the vamp and an upper are sewn to the top of the sole, the protective cloth is sewn to the top of the vamp, a hook-and-loop fastener is fixedly connected to one side of the protective cloth, a hook-and-loop fastener matched with the hook-and-loop fastener is fixedly connected to the surface of the upper, the vamp comprises a sun-proof layer, a heat insulation layer adheres to the bottom of the sun-proof layer, and the bottom of the heat insulation layer is provided with a protective layer. An air inlet channel is formed in the shoe sole. Through the combination of various structures, the protective cloth can be attached to the outer side of a shoelace, falling dust and fine stones can be prevented from entering a shoe through a gap in a shoe tongue, damage caused by falling of a heavy object can be resisted through the protective ring, external air is injected into the air inlet channel, and the shoelace can be prevented from falling off. The stuffiness condition caused by the fact that the foot sole is attached to the shoe sole can be conveniently avoided, foot sole sweating is reduced, and the wearing comfort effect is improved.

The invention relates to a preparation method of fish maw oligopeptide, which comprises the following steps: crushing fish maw to obtain fish maw powder, weighing a certain amount of fish maw powder, adding pure water, heating to obtain a fish maw powder solution, adding protease into the fish maw powder solution, carrying out multi-step enzymolysis reaction to obtain enzymatic hydrolysate, adding a composition into the enzymatic hydrolysate, and uniformly stirring to obtain the fish maw oligopeptide. The preparation method comprises the following steps: carrying out enzyme deactivation and filtration treatment on an enzymatic hydrolysate added with the composition to obtain a coarse filtrate, carrying out decoloration and deodorization treatment on the coarse filtrate, filtering to obtain a fine filtrate, and carrying out concentration and drying treatment on the fine filtrate to obtain the fish maw oligopeptide. The fish maw oligopeptide provided by the invention is lower in molecular weight, has better physiological activity, and has the capability of resisting UVR-induced epidermal cell mitochondrial damage.

A mobile tube conveyor is provided, which is damage-resistant, has a reduced risk of false detection, and can be manufactured at low cost. The mobile tube conveyor includes: a supply tube 10; a traveling unit 20; a plurality of pairs of arrival detection sections 30; and a control unit 40. The plurality of pairs of arrival detection sections are configured to detect the arrival of a first traveling section 21 and a second traveling section 22, respectively, and include first detection sections 31 and second detection sections 32 arranged along the traveling direction of the traveling unit 20 so as to be positionally corresponding to each other at intervals not exceeding a limit value of the difference in traveling distance between the first traveling section 21 and the second traveling section 22. The control unit 40 controls the travel of the traveling unit 20 to detect the arrival of a first detection section 31. N When the arrival of the first traveling part 21 is detected, the traveling unit 20 stops traveling, thereby allowing the traveling unit 20 to travel while the difference in traveling distance between the first traveling part 21 and the second traveling part 22 does not exceed a limit value. The traveling of the first traveling part 21 is stopped until a corresponding second detection part 32 is set up. N The arrival of the second traveling section 22 has been detected.

The invention belongs to the technical field of road and bridge paving materials, and discloses an anti-rutting epoxy asphalt toughening additive. The formula comprises the following components in parts by weight: 40 parts of solid epoxy resin, 35 parts of a latent polyester curing agent, 5 parts of an ultra-high molecular weight epoxy toughening agent, 20 parts of a water damage resistant improver, 100 parts of hard asphalt particles, 2 parts of an antioxidant, 5.5 parts of a silane coupling agent, 6 parts of nano silicon dioxide, 0.1 part of a curing accelerator, 0.5 part of a light stabilizer and 1 part of a lubricating separant. In the formula, solid epoxy reacts with a latent polyester curing agent to form a three-dimensional rigid structure, and the three-dimensional rigid structure is matched with oxidized asphalt particles and nano silicon dioxide, so that the high-temperature stability and the pressure resistance are remarkably improved, and ruts are inhibited from the source; the ultra-high molecular weight epoxy flexibilizer can prolong the molecular chain segment of a cross-linking point, and is combined with the curing accelerator to regulate and control the reaction rate, so that the low-temperature crack resistance and fatigue resistance are enhanced while the strength is ensured.

The present invention provides a method for debonding fertilized eggs of marine fish, comprising the following steps: S1. immersion and disinfection of fertilized eggs; S2. preparation of debonding liquid; S3. debonding of fertilized eggs; S4. separation and cleaning of fertilized eggs. Before debonding fertilized eggs of marine fish, the present invention first uses a composite Chinese herbal medicine preparation to soak the fertilized eggs of marine fish to kill bacteria and fungi in the fertilized eggs of marine fish. Avoid infection of fertilized eggs of marine fish during the debonding process, thereby improving the subsequent hatching rate of fertilized eggs of marine fish. The present invention uses a debonding agent composed of a specific proportion of disodium hydrogen phosphate, water, a composite enzyme solution, and cystine to debond fertilized eggs of marine fish. The debonding agent of the present invention is mild and non-irritating, and can effectively avoid damage to fertilized eggs of marine fish caused by mechanical vibration and friction in traditional debonding methods.

This utility model discloses a modular carpet with nano-silver ion antibacterial and easy-to-clean properties, including a first connecting carpet, a second connecting carpet installed on one side of the first connecting carpet, a snap-fit ​​carpet installed inside the second connecting carpet, and an installation pad fixedly connected to the bottom of the first connecting carpet. Through the cooperation of the first connecting carpet, the second connecting carpet, and the snap-fit ​​carpet, users can freely combine and splice them according to the size and shape of the space, adapting to various scenarios such as living rooms, offices, and irregular corners, meeting diverse installation needs. Secondly, the splicing is convenient and stable. Using the connecting structure composed of installation fixing blocks and connecting fixing blocks, the sliding connecting rod pushes the insertion rod to quickly and accurately connect the two carpets, requiring no complicated tools and simplifying operation. At the same time, this connection method effectively avoids displacement and gaps during use, ensuring the overall structural stability of the carpet and improving the user experience.

The utility model discloses an explosion-proof polyurethane tire for an engineering vehicle, which relates to the field of tires and comprises a hub and a tire body, the tire body is wrapped on the outer side of the hub, a plurality of metal rings are arranged in the tire body at equal intervals, the metal rings are sleeved on the outer side of the hub, a reinforcing sleeve is arranged in the tire body, and the reinforcing sleeve is sleeved on the outer side of the hub. According to the utility model, the plurality of metal rings are arranged in the tire body at equal intervals, and the reinforcing sleeves are arranged on the outer sides of the metal rings in the spiral winding manner, so that the overall strength and the impact resistance of the tire are enhanced; tire damage caused by puncture, collision and the like of sharp objects can be effectively resisted, the risk of tire burst under severe working conditions is remarkably reduced, and the driving safety of engineering vehicles is guaranteed.

The invention belongs to the technical field of lubricating grease, and relates to environment-friendly drilling tool thread grease and a preparation method thereof. The lubricant with the oily micro-lamellar structure wrapped with solid particles is prepared by taking a high-molecular polymer as a matrix and taking graphite, mica and molybdenum disulfide as lubricants, the lubricant with the oily micro-lamellar structure can form a film on the surface of a drilling tool and can be uniformly dispersed in thickened base oil, and under the action of the high-molecular polymer matrix, the lubricant with the oily micro-lamellar structure can form a film on the surface of the drilling tool. And a layer of net-shaped firm film can be formed. The drilling tool thread compound containing the oily microsphere lubricant further comprises base oil, a thickening agent, an antioxidant and a preservative. Under the synergistic effect of all the components, the drilling tool thread compound has better bearing capacity and extreme pressure resistance, the use temperature range is-80 DEG C to 500 DEG C, and the drilling tool thread compound does not contain any heavy metal, is environmentally friendly and can still keep lubricity and sealing performance under the conditions of high temperature, low temperature and large torque.