105results about How to "Reduce churn rate" patented technology

The invention discloses a remote sensing dynamic monitoring method for water and soil loss in water conservancy, and relates to the technical field of combination of water conservancy projects and remote sensing technologies. A data collection module is used for collecting and preprocessing monitoring data of remote sensing images, weather and soil, extracting historical data stored in a storage module, and combining the current monitoring data to obtain a remote sensing result; the method comprises the steps that a soil erosion intensity index TQ, a water and soil loss rate change rate LS and a water and soil conservation measure adjustment factor BCT are substituted into a comprehensive treatment evaluation module, the adjustment direction and strength of a water and soil conservation measure are formulated based on the water and soil conservation measure adjustment factor BCT, and monitoring data and measures for adjusting the direction and strength are stored in a storage module. According to the method, by introducing scientific quantitative indexes and constructing a cyclic influence mechanism, comprehensive monitoring and quantitative analysis of dynamic changes of water and soil loss are realized, and the method not only solves the problems and defects in the prior art, but also provides scientific basis and decision support for formulation and adjustment of water and soil conservation measures.

The invention belongs to the technical field of display screen detection, and particularly relates to display screen aging test equipment. Comprising an aging oven, through openings are formed in the two sides of the aging oven, a circulating track is arranged in the through openings in a penetrating mode, a circulating trolley is arranged in a track body of the circulating track, a positioning frame is installed at the top end of the circulating trolley, the positioning frame comprises a bearing part and clamping parts, and the clamping parts are installed at the two ends of the bearing part; according to the display screen aging test equipment provided by the invention, the circulating track is arranged; during testing, the display screen is mounted on the positioning frame, and then the circulating trolley drives the display screen on the positioning frame to enter the aging box through the through hole; after the test is completed, the circulating trolley carries the display screen out of the aging oven, and the display screen on the positioning frame is unloaded through the unloading assembly; the whole detection process is automatic, the test efficiency is high, and the test of mass products is facilitated.

The present invention discloses a composition with a penetration-promoting effect and a preparation method thereof, wherein the composition with a penetration-promoting effect comprises a solvent, a phase A moisturizer, a phase B moisturizer, a phase C moisturizer, a pH regulator, a thickener, a solubilizing agent, a skin conditioner, and a plant extract; wherein the skin conditioner is a compound of a bifid yeast fermentation product filtrate, decarboxylated carnosine hydrochloride, a yeast fermentation product extract, and ergothioneine; wherein the plant extract comprises an baobab seed extract, an echinacea extract, and a wood apple extract. A preparation method of a composition with a penetration-promoting effect is to uniformly stir the components of the composition with a penetration-promoting effect to obtain a composition with a penetration-promoting effect. The present application has the effect of significantly improving skin permeability, promoting effective moisturizing ingredients to penetrate into the stratum corneum of the skin, replenishing moisture for the skin from an endogenous source, and lastingly moisturizing.

The invention relates to the technical field of high-frequency preheating, and discloses a high-frequency preheating device for coating a multi-strand stranded enameled wire core, which comprises a main machine body, a preheating mechanism is arranged outside the main machine body, a mounting chamber is formed in the back surface of the main machine body, and a heat dissipation mechanism and an air guide mechanism are arranged inside the mounting chamber; the heat dissipation mechanism is used for conducting heat dissipation on the interior of the mounting chamber, the air guide mechanism is used for controlling the air outflow direction in the mounting chamber and controlling the air outlet to be switched between external air and the interior of the preheating mechanism, and a temperature sensor is fixedly connected to the interior of the mounting chamber; the preheating mechanism is used for preheating the metal wire core; by controlling the adjusting plate, the adjusting plate can conveniently and selectively seal the inner air cavity or the outer air cavity to adjust the air in the mounting chamber to flow out through the air outlet or flow out through the wire outlet through the outer thermal insulation box, so that different effects are achieved, the use flexibility of the device is effectively improved, and the use diversity of the device is effectively guaranteed.

The seawall slope protection ecological transformation structure comprises an embankment, a reinforcing assembly is arranged on one side of the top of the embankment, a slope protection assembly is arranged on the top of the reinforcing assembly, the slope protection assembly comprises a bottom plate, a protection foot is poured on the outer wall of one side of the top of the bottom plate, a riprap layer is arranged on the outer wall of one side of the top of the bottom plate, and a grating plate is placed on the outer wall of the top of the riprap layer; the riprap layer, the grating plate and the protection feet make contact with one another, and the grating plate comprises a core-spun cement fiber plate. According to the invention, during rising tide of seawater, the sides, with the convex blocks, of the blade plates are impacted, the blade plates rotate in the grooves, then silt carried by rising tide of seawater falls into the riprap layer through the grooves, and during subsequent falling tide, seawater falls to apply force to the other sides of the blade plates, so that the structure formed by the blade plates and the convex blocks is clamped in the grooves; a large amount of silt in the riprap layer is prevented from flowing along with seawater during ebb tide, the water and soil loss speed of the seawall coastal side slope protection is reduced, the number of times of manually supplementing the silt is reduced, and the seawall maintenance cost is greatly reduced.

The invention discloses a stepped low-temperature steam multi-layer cyclic utilization process and system, and relates to the technical field of steam utilization, steam generated by boiler heat passes through a pipeline I, when a temperature value detected by a thermometer II is greater than a set value, the steam enters a steam generator through the pipeline I and a flow valve I, and the steam generator generates power. When the temperature measured by a second thermometer is lower than a set value, water vapor enters a heat exchange chamber in a first heat storage box through a first pipeline, a fifth flow valve, a sixth pipeline and a first quick insertion pipe, and heat is transferred to the first heat storage box, the second heat storage box and a third heat storage box to be stored in sequence; therefore, high-temperature steam can be reasonably heated and then fed into the steam generator again for power generation, heat of low-temperature steam is stored, the utilization efficiency of the heat of the steam is improved, a mixture of water and alcohol is arranged in the shell to absorb the heat of the steam in the heat exchange chamber, then evaporation heat transfer is conducted, and the heat exchange efficiency is improved.

The invention belongs to the technical field of concrete materials, and particularly relates to high-impermeability concrete suitable for a fabricated pavement and a preparation method of the high-impermeability concrete. The high-impermeability concrete suitable for the fabricated pavement is prepared from the following raw materials in parts by weight: 360-550 parts of a cementing material, 300-360 parts of fine aggregate, 1-3 parts of a water reducing agent, 1-3 parts of a waterproof agent, 2-5 parts of polyethylene fibers, 120-160 parts of water and an impermeability component, wherein the cementing material is prepared from 110 to 180 parts of limestone calcined clay cement, 30 to 70 parts of silica fume and 220 to 300 parts of fly ash. The invention aims to prepare the concrete with high impermeability through the combined action of the LC3 cement, the PE fiber, the waterproof agent, the silane modified polymer, the acrylic copolymer and the polyvinyl formal, the concrete is suitable for the fabricated pavement, and the porosity is reduced and the impermeability of a cement base is improved by preparing the LC3 cement; the PE fibers are adopted, so that high-strength and high-toughness performance is provided; the water reducing agent and the waterproof agent are added, so that the compactness of the concrete material is improved, and the impermeability is improved.

The invention relates to the technical field of agricultural cultivation, in particular to a fine grain tailing-based rice seedling substrate and a preparation method thereof. The fine grain tailing-based rice seedling raising substrate comprises the following components: fine grain tailings, fresh animal waste powder, a modifier A and diatomite. The fine grain tailing rice seedling raising substrate has excellent water and fertilizer retention performance, can effectively improve the soil structure and physicochemical properties, improves the air permeability and water retention of the substrate, promotes plant growth, and reduces dependence on soil resources and influences on the environment. The fine grain tailing-based rice seedling substrate prepared by the invention is wide in material source and simple in preparation process, has the advantages of promoting healthy and strong growth of seedlings, enabling seedlings to emerge neatly, being developed in root system, multiple and long in root system, strong in root system coiling force, high in seedling rate, high in comprehensive quality of the seedlings and the like, and has a relatively wide application prospect.

The invention belongs to the technical field of building materials, and discloses anti-cracking machine-made sand concrete and a preparation method thereof. The anti-cracking machine-made sand concrete is prepared from the following raw materials: cement, coal ash, machine-made sand, coarse aggregate, basalt fiber, water and a polycarboxylic acid water reducing agent, the modified machine-made sand is prepared by wrapping the machine-made sand with a molten rubber mixture glue solution and adhering and coupling the modified nano aluminum oxide on the outer surface of the machine-made sand. The preparation method of the anti-cracking machine-made sand concrete comprises the following steps: mixing dry materials to prepare a mixture, adding water and a water reducing agent into the mixture to prepare mortar, and adding coarse aggregate into the mortar to prepare the machine-made sand concrete. The modified machine-made sand is smooth in surface, regular in shape and easy to uniformly disperse in concrete mortar, the loss speed of free water in mortar pores is reduced, and the anti-cracking performance of machine-made sand concrete can be improved after the modified machine-made sand is doped into the concrete mortar.

The invention relates to the field of rare earth metal preparation equipment, in particular to a high-stability and high-consistency rare earth metal preparation device and method.The high-stability and high-consistency rare earth metal preparation device comprises an electrolytic bath, the electrolytic bath comprises a bath body, an electrolytic cavity is formed in one side in the bath body, an equipment cavity is formed in the other side in the bath body, and a control panel is installed on one side of the bath body; an end cover is mounted at the top of the tank body, uniformly distributed through holes are formed in one side of the top of the end cover, transverse frames are fixedly connected to the front side and the rear side of the upper part in the electrolysis cavity, a plurality of fixing rods are supported on the upper parts of the transverse frames, cathode plates and anode plates are mounted at the bottoms of the fixing rods respectively, and the cathode plates and the anode plates are alternately distributed; according to the rare earth metal electrolysis device, separation and collection of gas generated in the preparation process are achieved, and therefore the phenomenon that the purity of rare earth metal is affected due to the fact that the gas generated by the anode plate in the electrolysis process is reversely diffused to the area of the cathode plate can be avoided.

The invention relates to the technical field of meal delivery robots, in particular to a meal delivery robot with a built-in heat preservation box, and solves the problems that an existing meal delivery robot lacks a heat preservation structure and is low in meal delivery efficiency. The meal delivery robot comprises a robot base, a shell is arranged at the upper end of the robot base, a meal delivery opening is formed in the shell, and a door plate is hinged to the meal delivery opening; a first box body and a second box body are slidably connected in the shell, driving mechanisms are arranged between the first box body and the shell and between the second box body and the shell, a first cover plate and a second cover plate are slidably connected in the shell, and heat preservation layers are arranged in the first box body and the second box body; the driving mechanism comprises a first fixing rod and a second fixing rod, a first swing rod is hinged to the first fixing rod, a second swing rod is hinged to the second fixing rod, and a connecting plate is hinged to the free end of the first swing rod and the free end of the second swing rod. According to the meal delivery robot, a better heat preservation effect can be achieved on meals, the meal delivery efficiency of the meal delivery robot is improved, and the situation that the quality of the meals is affected due to odor tainting is avoided.

The utility model discloses a plastic bag production blow molding machine convenient to use, which comprises a machine body, cooling fans are fixedly mounted on two sides in the machine body, a blow molding machine main body is fixedly mounted in the machine body, a filter screen plate is mounted at the top end of the blow molding machine main body, and a heating tank is mounted at the top end of the machine body. And a discharging pipe is fixedly connected between the heating tank and the machine body, a feeding port is fixedly formed in one side of the top end of the heating tank, and a driving motor is fixedly connected to the middle position of the top end of the heating tank. According to the plastic bag production blow molding machine convenient to use, the speed of air circulation in the machine body can be increased through a cooling fan, the rapid cooling forming function is achieved, the guide angle of a guide roller can be adjusted, and during adjustment, a limiting clamping block is moved out of a limiting clamping groove firstly; and then the supporting frame is moved to a proper guiding position and then is positioned by using the limiting clamping block, so that the problem of poor guiding and cooling effects is solved.

This invention belongs to the field of supercapacitor technology, specifically relating to a molybdenum oxide-molybdenum disulfide@polytannic acid electrode material, its preparation method, and its applications. Using molybdenum foil as the current collector and electrode, this invention prepares a molybdenum oxide-molybdenum disulfide electrode using electrochemical oxidation and hydrothermal methods. A polytannic acid coating is deposited on its surface to prepare a biodegradable molybdenum oxide-molybdenum disulfide@polytannic acid electrode. This electrode is then sandwiched with a biodegradable gel electrolyte and encapsulated with a biodegradable encapsulation material to construct a biodegradable supercapacitor with self-discharge suppression capabilities. By depositing a polytannic acid coating on the surface of the supercapacitor electrode, its self-discharge behavior is suppressed. The polytannic acid coating can prevent parasitic Faraday reactions of impurity ions on the electrode surface and prevent charge transfer, thereby suppressing the capacitor's self-discharge behavior. Simultaneously, the electrode, electrolyte, and encapsulation material can all degrade in simulated body fluids, potentially opening up applications in implantable medical electronic devices.

The utility model relates to the technical field of maltodextrin preparation, in particular to a maltodextrin preparation device. The maltodextrin preparation device comprises a box body, a water pump is arranged at the top of the box body, a water storage cavity is formed in the box wall of the box body, a water pumping pipe of the water pump is communicated with the water storage cavity, a spraying ring is arranged at the top of the inner side wall of the box body, and a water outlet pipe of the water pump is communicated with the spraying ring. Wherein an electric heating rod is arranged in the water storage cavity; when the interior of the box body needs to be cleaned, the inner wall of the box body is heated through hot water in the water storage cavity, maltodextrin attached to the inner wall can be heated and softened, meanwhile, the hot water in the water storage cavity is input into the spraying ring through the water pump, and the hot water is evenly sprayed into the box body through the spraying ring; and residual maltodextrin in the box body can be softened and washed through hot water, so that the cleaning effect can be effectively improved, and the use of a water source is reduced.

This invention discloses a catalyst for the dehydrogenation of ethylbenzene to styrene, its preparation method, and its application. The catalyst comprises the following components: Fe₂O₃, FeNb₂O₆, K₂O, CeO₂, WO₃, BeO, SrO, and at least one selected from CoO and NiO. Using this catalyst in the dehydrogenation of ethylbenzene to styrene primarily solves the problems of low activity and poor stability of low-potassium catalysts under high pressure and low water ratio conditions found in previous technologies. After 1600 hours of stable operation, the K₂O activity in the dehydrogenation liquid phase can be significantly reduced. + The concentration is still below 0.0015 mg / L.

The heat preservation cover device comprises a first steel plate (1), a second steel plate (2), a third steel plate (3), a fourth steel plate (4) and a second steel pipe (7), the third steel plate (3) is sleeved with the first steel plate (1), the two ends of the second steel plate (2) are connected with the upper end of the first steel plate (1) and the upper end of the third steel plate (3) respectively, and the lower end of the first steel plate (1) and the lower end of the third steel plate (3) are fixedly connected with the fourth steel plate (4). A second steel pipe through hole matched with the second steel pipe (7) is formed in the center of the fourth steel plate (4), and the second steel pipe (7) is fixedly arranged at the second steel pipe through hole. The heat preservation cover is manufactured to seal the furnace mouth of the converter, the labor cost for mounting and dismounting a coal oxygen lance and a pipeline is reduced, potential safety hazards caused by using coke oven gas are reduced, and the coke oven gas and compressed air are saved.

The utility model discloses an intercepting device for preventing water and soil loss. According to the intercepting device for preventing water and soil loss, a plurality of flowing holes are formed in the two sides of hollow baffles in a penetrating mode, steel pipes are fixedly installed in the flowing holes and are aluminum metal hollow pipe flow channels, the hollow baffles are further provided with a plurality of filtering holes, one end of each steel pipe is fixedly installed on a second hollow baffle, and the other end of each steel pipe is fixedly installed on a third hollow baffle. A first sand and mud blocking partition plate and a second sand and mud blocking partition plate are fixedly installed at the two ends of each hollow baffle, a large-area water and soil loss area can be divided into a plurality of small areas through the arrangement shape of the multiple hollow baffles fixedly penetrating into soil, and therefore the water and soil loss range is reduced, and the scouring force caused by water and soil loss can be effectively reduced; and the filtering holes are formed in the hollow baffles, redundant water in water and soil loss can be filtered out, the redundant water flows into the hollow baffles, and the water and soil loss speed can be effectively reduced.

The utility model relates to the technical field of mine car anti-freezing, and discloses a mine wide-body mine car anti-freezing device which comprises a main body mechanism, an anti-freezing mechanism and a cleaning mechanism, the anti-freezing mechanism is located at the inner end of the main body mechanism, the cleaning mechanism is located at the upper end of the main body mechanism, and the main body mechanism comprises a storage warehouse, a fixing column and a groove. The fixing column is fixedly installed at the right end of the inner end of the storage warehouse, the groove is fixedly formed in the left end of the fixing column, the main body mechanism further comprises a first motor, a first lead screw, a limiting disc, a first positioning nut, an air heater and a movable door, and the first motor is fixedly installed at the upper end of the inner end of the groove. The first lead screw is fixedly installed at the lower end of the transmission end of the first motor, and the limiting disc is fixedly installed at the upper end of the outer end of the first lead screw. According to the anti-freezing device for the wide-body mine car of the mine, by installing the main body mechanism, the heating and heat preservation range is conveniently widened, the anti-freezing effect is improved, the use requirements of people are conveniently met, and functionality and practicability are improved.

This invention relates to the field of vegetable cultivation technology, specifically to a substrate and method for cultivating tomatoes in greenhouses on non-arable land in desert areas. It comprises the following raw materials: nano-hydrogel-coconut coir, humic acid, crushed fermented rice husks, zinc sulfate, lime powder, Bacillus subtilis preparation, carboxymethyl cellulose, and sodium alginate-epoxy resin coated compound fertilizer. The nano-hydrogel penetrates the pores of the coconut coir to form a three-dimensional network, enhancing water retention; sodium alginate and hydrogel construct a stable network through ionic cross-linking and hydrogen bonding, improving nutrient retention; the resin-hydrogel interface is optimized to promote water and nutrient transport; carboxymethyl cellulose regulates interfacial compatibility, maximizing synergistic effects. The multiple chemical bonds and physical network structure synergistically enhance water retention and slow-release properties, providing an ideal substrate for tomatoes in greenhouses in desert areas.

The utility model relates to the technical field of flue gas treatment devices, and discloses a flue gas treatment device for an asphalt concrete mixing machine, which comprises a device main body, a water tank body is sleeved on the outer wall of the device main body, a water inlet pipe is arranged at the top end of the water tank body, and a water outlet pipe is arranged at the bottom end of the water tank body. A temperature sensor is installed in the water tank body, an automatic water supplementing valve is arranged on the water inlet pipe, an automatic water draining valve is arranged on the water outlet pipe, and a control panel is arranged outside the water tank body. The flue gas treatment device for the asphalt concrete mixing machine solves the problem that most of traditional flue gas treatment devices for the asphalt concrete mixing machine in the market are not provided with waste heat recovery devices, and consequently a large amount of heat energy is wasted in the using process of the flue gas treatment devices. Water in the device body can be heated through heat of gas in the device body, heat energy of the device body is recycled, and waste is avoided.

The utility model discloses an agricultural seedling raising box, which belongs to the technical field of energy-saving seedling raising substrate blocks, and solves the problems that the survival rate of seedling raising or transplanting is reduced due to excessive water consumption, insufficient energy conservation, overlong main roots, weaker lateral root development, disordered seedling root systems in a seedling raising container and long seedling raising period in the common seedling raising technology. The containing frame is wrapped by the inner-layer non-woven fabric and the outer-layer non-woven fabric, so that the first container is breathable, ultraviolet radiation can be effectively blocked, and the water loss speed of soil in the first container is reduced; root systems at the upper ends of seedlings can better absorb fertile soil fertilizer on the surface through the conical first container, root tips stop growing when the root systems of the seedlings growing outwards and downwards make contact with air through the multiple air holes arranged in the conical shape, new roots continue growing downwards, a large amount of water is stored in the second container, the lateral roots are short and thick, and the lateral roots grow downwards. And the survival rate is increased.

The utility model relates to the technical field of hot water supply, in particular to an energy-saving hot water supply system which comprises a hot water device body, a water collecting tank is fixedly arranged on the side face of the hot water device body, two sliding rails are fixedly arranged in the water collecting tank, sliding grooves are formed in one sides of the two sliding rails, and a supporting plate is fixedly arranged in the water collecting tank. The top end of the supporting plate is provided with a plurality of scraping plates, sliding blocks are fixedly arranged on the two sides of each scraping plate, the side faces of the sliding blocks slide relative to the interiors of the two sliding grooves respectively, and a water collecting hopper is fixedly arranged at the bottom end of the interior of the water collecting tank. Heat waste caused by the fact that hot water is exposed in air for a long time is avoided, the water outlet groove can be automatically sealed after the hot water enters the water storage tank through the springback design of the baffle, and heat loss in the water storage tank can be conveniently reduced.

The utility model relates to the technical field of solid oxide fuel cells, in particular to a heat preservation structure of a solid oxide fuel cell, which comprises a box body. After the temperature in the box body rises until the battery is started, the heat gathering copper pipe gathers heat and transmits the heat to the thermosensitive spring, the thermosensitive spring is heated and expanded to drive the sliding block to slide upwards, and after the sliding block makes contact with the touch sensitive switch, the vacuumizer is controlled to work to vacuumize the cavity in the box body, so that heat loss is reduced, the negative pressure in the box body drives the circular plate to move leftwards, and the heat loss is reduced. When the battery is started, the tension spring is stretched, the position of the circular plate can be observed through the transparent glass tube, so that the negative pressure state in the box body is judged, the arrangement of the glass fiber layer and the aerogel layer plays a role in heat preservation, the battery body can be preheated, the time wasted by cold start is shortened, meanwhile, negative pressure can be automatically formed in a cavity in the box body after the battery is started, and the service life of the battery is prolonged. The heat preservation effect is achieved, and the heat loss speed is reduced.

The application discloses a gelatin-bacteriocin amino acid-dialdehyde starch composite film and a preparation method and application thereof. The preparation method of the composite film comprises the following steps: adding a crosslinking agent into a gelatin solution, adding N-hydroxysuccinimide into the gelatin solution after activation for a set time, then adding bacteriocin amino acid into the gelatin solution, coupling for a set time under weak acid condition and in the dark, and obtaining Gel-MAAs; dissolving the Gel-MAAs in water to obtain a composite solution; dissolving dialdehyde starch in water, gelatinizing, adjusting to weak alkalinity, and obtaining a dialdehyde starch solution; adding the dialdehyde starch solution into the composite solution, mixing uniformly, reacting at 35-45 DEG C for 1-3 h, adding glycerol with a mass fraction of 1-5%, ultrasonic degassing, pouring the film solution into a mold, and drying, and thus the composite film is obtained. The composite film has excellent mechanical properties, physicochemical properties, ultraviolet resistance, good biocompatibility, and great potential in the field of active composite films.

The utility model discloses a chemical reaction water bath constant-temperature heating device, which belongs to the field of chemical reagents, solves the problem that the existing opening part is not fit with the caliber of a test tube, and comprises a main body piece, a top plate, a placing plate and a heating component, the heating component is fixedly arranged in the main body piece, and the placing plate is arranged in the main body piece in a sliding manner; a top plate is installed at an opening in the top end of the main body piece in a sliding mode, protection mechanisms are symmetrically and fixedly installed in the top plate, and each protection mechanism comprises a containing groove, a moving groove, a moving piece, an outer cover, a middle cover and an inner cover. Compared with the prior art, test tubes and beakers with different calibers and different base sizes can be stably limited and supported, and when openings of the test tubes are protected and limited, leakage of internal water vapor can be effectively reduced, the heat loss speed in the equipment is reduced, so that the equipment is more perfect in adaptability and wider in practical effect when being used.

The invention belongs to the technical field of multifunctional super-smooth surfaces, and discloses a super-smooth coating capable of continuously and automatically releasing lubricating liquid based on organic silicon resin. The super-smooth coating is obtained by mixing, stirring and carrying out cross-linking reaction on organic silicon resin, a cross-linking agent, a catalyst, an auxiliary agent, a filler and a lubricating liquid, coating the surface of the matrix, and curing. A substrate is coated with the super-smooth coating paint through simple construction, a super-smooth coating capable of continuously and automatically releasing lubricating liquid is obtained after cross-linking curing, the problem that storage of the lubricating liquid depends on a micro-nano structure can be effectively solved, and the super-smooth coating paint has stable and durable service performance.

The invention discloses an acid-base composite high-temperature proton exchange membrane as well as a preparation method and application thereof. The acid-base composite high-temperature proton exchange membrane is prepared by carrying out acid-base crosslinking on a hydrogen bond organic framework material containing carboxyl and polybenzimidazole and then soaking in phosphoric acid. The hydrogen bond organic framework material containing carboxyl is blended with polybenzimidazole, and carboxyl of the hydrogen bond organic framework material can be subjected to acid-base crosslinking with polybenzimidazole, so that the mechanical strength of the composite membrane is improved; meanwhile, the hydrogen-bond organic framework material provides huge storage space and binding force for phosphoric acid molecules due to ultrahigh specific surface area and hydrogen-bond interaction, so that the proton conduction performance, phosphoric acid stability and high-temperature battery performance of the composite membrane are improved. Compared with the prior art, the novel acid-base composite high-temperature proton exchange membrane prepared by the invention has relatively high proton conductivity at 100-200 DEG C and relatively high mechanical strength, and a battery assembled based on the membrane can stably run at 100-200 DEG C.

The invention relates to the technical field of building materials, and provides a composite wall which comprises a base and a plurality of prefabricated formworks arranged at the top of the base, each prefabricated formwork is internally provided with a heat preservation cavity, each heat preservation cavity comprises a first heat preservation area and a second heat preservation area which communicate with each other, and a first heat preservation plate is arranged in each first heat preservation area; a second heat preservation plate is slidably mounted in the second heat preservation area, and one side of the second heat preservation plate extends to the first heat preservation area and is attached to the first heat preservation plate; the prefabricated formwork is provided with a driving assembly used for driving the first heat preservation plate to move to the first heat preservation area. According to the composite wall body, the environment adaptability of the composite wall body can be improved.

The utility model belongs to the technical field of building construction, and particularly relates to a concrete maintenance device for building construction, which comprises a vehicle body, steering wheels mounted at the left end of the vehicle body, a water tank fixed on the upper left of the vehicle body, a water pump fixed on the right side of the bottom of the water tank, and a water pumping pipe fixedly connected with the input end of the water pump. The output end of the water pump is fixedly connected with a hose, a water supplementing maintenance assembly is arranged on the inner side of the right end of the vehicle body, a rear wheel assembly and a film covering assembly are sequentially arranged on the right side of the water supplementing maintenance assembly, and the water supplementing maintenance assembly, the rear wheel assembly and the film covering assembly are in linkage. The concrete curing device has an auxiliary film covering function, the water loss speed can be effectively reduced through plastic film covering, and the concrete curing effect is improved.

The application relates to the technical field of water treatment, and discloses an iron-carbon reinforced composite COD (Chemical Oxygen Demand) reduction filler and a preparation method thereof, which comprises the following steps: placing elemental sulfur in a heating reactor to melt the elemental sulfur, stirring to obtain a molten sulfur phase containing an alkali source, adding iron-loaded activated carbon to blend to obtain a high-temperature paste material, injecting the paste material into a sheet-shaped mold to be cooled and solidified to be formed, and demolding. Through the use of elemental sulfur to form a solid continuous phase skeleton, the slow-release alkali source and the iron-loaded activated carbon are networked and fixed inside the elemental sulfur, the internal component loss speed is delayed, the physical and chemical structure is maintained to be complete, and an integrated particle structure is formed. The slow-release alkali source is used to release alkalinity to neutralize the acidity accumulation of the reaction interface, buffer the pH fluctuation in wastewater treatment, and hinder the generation of a dense passivation film on the iron surface. The filler can increase the contact area between wastewater and catalytic sites, reduce the fluid resistance of wastewater, and alleviate the flow channel blockage problem caused by flocculation accumulation in long-term operation.