3695 results about "Air bubble" patented technology

A heat management system includes: a first flow passage in which a reserve tank is not provided; a second flow passage in which a reserve tank is provided; a switching device configured to switch between coupling and uncoupling of the first flow passage and the second flow passage to and from each other; and a control device configured to control the switching device. The control device is configured to, when predetermined coupling conditions are met, make the heat medium flow through the first flow passage and the second flow passage that have been coupled to each other by the switching device. When the control device determines that air bubbles exceeding the allowable volume are present in the heat medium, the coupling conditions switch from being unmet to being met.

The invention relates to the technical field of nanoimprint, in particular to a preparation device and method of an elastomer imprint head, and the device comprises a base, a silicon wafer, a silica gel pad, a metal positioning sheet, a quartz sheet and a top cover; the embossment of the silicon wafer is adjusted in vacuum to form a central convex surface of the embossing head, and the elastomer embossing head with a specific curvature is prepared by combining an ultraviolet curing process. The impressing head is attached from the center to the edge during impressing so as to discharge bubbles, the edge is separated preferentially during demolding so as to reduce demolding force, the impressing head is matched with a semiconductor stepping process, and the yield is increased to 98% or above. The method has the technical advantages that the method can be compatible with a stepping imprinting manufacturing process, flaws in an imprinting structure can be effectively reduced through a special contact and demolding mode, and the yield is increased.

The low-pressure casting and pouring system comprises a base, a sliding table, a lower die, a first rack, a second rack and an upper die, the sliding table is fixedly connected to the upper surface of the base in the left-right direction, the bottom of the lower die is fixedly connected with the top of the sliding table, and the lower die moves left and right through the sliding table; the first machine frame and the second machine frame are fixedly connected to the left end and the right end of the upper surface of the base correspondingly, the number of the first hydraulic oil cylinders is two, and the two first hydraulic oil cylinders are fixedly connected to the left end and the right end of the upper surface of the first machine frame correspondingly; the output end of the first hydraulic cylinder is fixedly connected with the top of the upper die. Alternating vibration of the lower die is achieved, the liquidity of molten aluminum can be improved, discharging of bubbles in a die cavity of the lower die can be enhanced, the quality of a formed aluminum bar is guaranteed, time and labor are saved during single grabbing and discharging of the aluminum bar, and the casting efficiency of the aluminum bar is improved.

The invention relates to the technical field of composite materials, in particular to high-thermal-conductivity organic silicon resin and a preparation process thereof. The invention relates to a preparation process of organic silicon resin with high thermal conductivity. The preparation process comprises the following steps: adding a nano filler with high thermal conductivity into a silane coupling agent for surface modification; adding the modified filler into an organic silicon resin matrix, mixing, adding a cross-linking agent, and carrying out shearing treatment; pouring the mixed solution into a mold, and treating in a strong electromagnetic field; placing the mold in a vacuum filling device to remove bubbles; and putting the mixture into a drying oven for crosslinking and curing to obtain the high-thermal-conductivity organic silicon resin. Through the high-speed shearing effect, the filler is arranged in the matrix in the shearing direction to form a continuous heat conduction path, the filler is regularly guided through a strong electromagnetic field to form a continuous heat conduction channel, bubbles in the material are removed under the vacuum condition, it is ensured that organic silicon resin is filled into pores of a filler framework, and the heat conduction performance of the filler is improved. The uniformity and integrity of the material are improved, and the interface thermal resistance is reduced, so that the heat-conducting property is improved.

The invention discloses a steel structure weld defect detection device and method.The steel structure weld defect detection device comprises a U-shaped base, a transmission roller, an L-shaped frame, an ultrasonic probe, a liquid spraying mechanism and a display device, the transmission roller is arranged on the U-shaped base and used for supporting and rotating a steel pipe, and the L-shaped frame fixes the ultrasonic probe so that the ultrasonic probe can make contact with the surface of a steel pipe weld for real-time detection; a liquid spraying mechanism uniformly sprays water-based foam liquid on the surface of the welding seam, an air spraying device blows air into air holes in the welding seam, so that air enters the foam liquid through the air holes to form stable air bubbles, and a cleaning mechanism wipes the residual foam liquid on the surface of the welding seam to ensure that the surface is clean and tidy; according to the method, high-precision detection of the welding seam of the steel pipe is achieved, the automation degree of operation is high, manual intervention is reduced, the detection efficiency and accuracy are improved, and the continuity of detection and follow-up evaluation work can be improved.

The invention provides an air bubble film bag production line and a method thereof, and relates to the technical field of air bubble film production equipment.The air bubble film bag production line comprises an air bubble film production assembly, a first buffering assembly, a second buffering assembly, a before-folding transition assembly, a folding assembly and a pressing and cutting assembly which are sequentially connected; the bubble film production assembly comprises a bubble forming part, the bubble forming part comprises a bubble roller body, a water through hole is formed in the center of the bubble roller body, and a plurality of vent holes are formed in the circumference of the bubble roller body. The air bubble film production device has the beneficial effects that the air bubble film production assembly is linked with the folding assembly and the pressing and cutting assembly, air bubble films produced by the air bubble film production assembly can be input into the folding assembly and the pressing and cutting assembly in diameter for production of air bubble film bags, and the situation that the air bubble films are rolled into packages is avoided; and the rolled air bubble film is mounted on the air bubble film bag production equipment, so that the production efficiency of the air bubble film bags is greatly improved, and human resources of a production workshop are saved.

The invention relates to a method and system for monitoring the number and radius of bubbles in a sieve-plate tower, and the process is as follows: dividing two frequency bands of a bubble generation sound production area and a bubble breaking sound production area according to the frequency in an audible sound range [20-20,000] Hz; sound sensors are installed between the sieve-plate towers and / or in the middle of the height of a liquid layer, and sound signals of fluid in the towers in the driving process are collected; the collected sound signals are preprocessed; obtaining the dominant frequency of each sound wave pulsation in the sound signal by using a fast Fourier transform algorithm, determining whether the dominant frequency belongs to a bubble generation sound production area or a bubble breaking sound production area according to the frequency band in which the dominant frequency is located, and substituting the dominant frequency into a corresponding correlation formula to determine the radius of the bubble; and counting the number of pulse peaks in the bubble generation sound production area and the bubble breaking sound production area within the sample time, and respectively obtaining the generation number of bubbles and the breaking number of bubbles. And real-time monitoring of the number and size of bubbles in the sieve-plate tower in a driving state is realized.

The invention belongs to the technical field of biological liquid sample detection, and particularly relates to a liquid path system for sample suction quality detection and an anomaly detection process. A liquid path system for sample suction quality detection comprises a capacitance detection module, an injector, a pressure detection module, a cleaning valve, a cleaning pump, a degassing module and a water tank which are connected in sequence, and the capacitance detection module, the injector, the pressure detection module, the cleaning valve, the cleaning pump, the degassing module and the water tank are connected through pipelines. The method mainly solves the following problems: 1, the contradiction between the pressure monitoring range and the monitoring resolution; 2, when the sample is insufficient or bubbles are sucked, the difference between the suction pressure and the normal liquid suction pressure is small, so that misjudgment is easily caused; 3, misjudgment is easily caused by noise signal interference; 4, corresponding error monitoring mechanisms are lacked in other processes such as cleaning, sample adding and the like; and 5, monitoring is performed by excessively depending on a single mode, and the pressure is easily interfered in the testing process.

The invention discloses a method for improving the mineral flotation recovery rate through hydrophobic nanoparticle armored bubbles, belongs to the technical field of mineral flotation, and can solve the problems of low flotation recovery rate and the like in the existing flotation technology. The hydrophobic nano particles comprise any one of carbon black, coal, graphite particles, cyclodextrin, hydrophobic modified nano silicon dioxide particles, hydrophobic modified fly ash, hydrophobic modified kaolin micro-nano particles and polystyrene nano particles; according to the method, the hydrophobic nanoparticles are used for armoring bubbles, so that the hydrophobic acting force between particles and the bubbles can be enhanced, and the flotation efficiency is improved; in addition, the existence of the nano-particles is easier to puncture liquid films of the particles and the bubbles, and the induction time is shortened. And meanwhile, the adhesion stability of mineral particles and bubbles is improved.

The invention relates to a concrete vibration monitoring method and system based on image recognition and three-dimensional point cloud, and the method comprises the following steps: obtaining an image of a concrete surface in a vibration process and three-dimensional point cloud data of the concrete surface, marking coarse aggregate and bubbles on the concrete surface, and obtaining an image sample data set; using the image sample data set to train a target detection algorithm, and identifying aggregate and bubbles in the image; counting the number of coarse aggregates and the number of bubbles in the image; extracting the z coordinate value of each point on the vibration surface from the point cloud data to obtain the elevation difference of the whole vibration surface; establishing respective correlation models of the aggregate quantity, the bubble quantity, the elevation difference and the strength, the porosity and the segregation index by utilizing a regression model; and evaluating whether the vibration effect is qualified or not according to a prediction result of the correlation model. Real-time monitoring can be achieved in the vibrating process, and comprehensive and accurate vibrating quality evaluation is achieved.

The invention relates to the technical field of hemispherical harmonic oscillator assembly, in particular to a welding method and device for an assembled hemispherical harmonic oscillator, and the device comprises a vibration welding platform and a clamping assembly located above the vibration welding platform; the vibration welding platform is used for bearing the sensitive base and providing a thermal field and a vibration field needed by welding, and the clamping assembly is used for clamping the center shaft and sending the center shaft into a center hole of the base. A heating unit and a composite vibration ultrasonic transducer are arranged in the platform, and the platform is configured to apply high-frequency vibration formed by superposition of vertical longitudinal waves and horizontal torsional waves to the base. The high-frequency vibration thixotropic effect is used for reducing the viscosity of the molten solder, the ultrasonic cavitation effect is used for forcibly discharging bubbles at the bottom of the blind hole, and the sound radiation pressure generated by the vibration standing wave field is used for driving the center shaft to achieve friction-free self-centering in the hole. According to the device, the problems of air bolt pseudo soldering and rigid assembly clamping stagnation in the traditional process are solved, and the assembly coaxiality and the connection strength of the harmonic oscillator are remarkably improved.

The invention discloses a vibrating production device for concrete prefabricated part machining, and relates to the technical field of concrete prefabricated parts, the vibrating production device comprises a vibrating mechanism and translation sliding blocks mounted on the two sides of the bottom of the vibrating mechanism, a formwork fixing mechanism is arranged at the bottom of the vibrating mechanism, and clamping sliding plates are arranged on the two sides of the formwork fixing mechanism; the vibrating mechanism comprises a vibrating sliding disc, a longitudinal threaded sleeve is fixedly installed on the top of the vibrating sliding disc, electric telescopic rods are fixedly installed on the periphery of the bottom of the vibrating sliding disc, a supporting chassis is fixedly installed at the bottoms of the electric telescopic rods, and connecting ropes are fixedly installed on the periphery of the bottom of the supporting chassis. When the lifting frequency of the light foam disc and the detection rod is reduced, it shows that bubbles in the concrete are discharged, at the moment, the vibrating rod can be pulled out for concrete vibrating in other areas, and the situation that the quality of the formed concrete is affected due to concrete segregation caused by excessive concrete vibrating is avoided.

The invention relates to the field of decorative films, in particular to an indented pattern color scraping decorative film and a preparation method thereof.The indented pattern color scraping decorative film comprises a skin feeling functional layer, a pattern developing layer, a supporting strengthening layer and a coloring strengthening layer, the skin feeling functional layer, the pattern developing layer and the supporting strengthening layer are composited into an integrated structure through hot pressing, and micron-sized air guide grooves are formed in the bonding faces of all the layers; the air guide grooves are arranged in parallel along the extending direction of the dimpled grains, the 60-degree glossiness of the surface of the decorative film is less than 3GU, the pencil hardness is greater than 1H, and the texture spacing difference between the outline edge of the dimpled grains and the printed pattern layer is 0.1-0.5 mm, so that the decorative film is endowed with excellent stereoscopic visual effect and physical property. The dimpled grain structure in the skin-touch functional layer is directly formed on the surface of the skin-touch coating, the problem of interlayer dislocation caused by traditional composite embossing is avoided, it is ensured that the dimpled grain outline is clear, the peeling strength between layers is high, bonding is tighter, and no bubble is left on the bonding face between the layers.

The invention provides an underground water constant-speed sampling device, and belongs to the technical field of underground water sampling, the underground water constant-speed sampling device comprises a box body, a water inlet pipe is horizontally arranged at the upper part in the box body, the left end of the water inlet pipe penetrates through the left side wall of the box body and is connected with a water suction pump, the right end of the water inlet pipe is provided with a pressure relief assembly, and the bottom of the water inlet pipe is vertically provided with a plurality of water outlet pipes; the underground water constant-speed sampling device comprises a box body, a water inlet pipe and a plurality of water outlet pipes, the water outlet pipes are sequentially arranged in the box body at intervals in the length direction of the water inlet pipe, a sampling bottle is placed below each water outlet pipe, and a first fixing assembly is arranged at the position, located at each water outlet pipe, of the water inlet pipe. The problems that sampling personnel are inconvenient to sample and the working efficiency is low are solved, stable control over the water flow speed in the underground water sample collection process is achieved, automatic control over the sample collection amount is achieved, and air bubbles generated by air mixing in the sampling process are effectively avoided.

The invention relates to the field of PCB (printed circuit board) printing, in particular to a high-precision multi-layer lamination and alignment PCB printing process which comprises a substrate pretreatment stage, a substrate preassembly stage, a dynamic lamination stage and a finished product output stage, the dynamic lamination stage comprises preheating treatment and resonance impurity removal treatment, and the lamination stage is divided into multi-stage lamination. And air bubbles and resin between the laminated bodies are optimized in the second pressing stage. According to the method, the inner-layer core plate and the copper foil are pretreated, so that positioning of the multi-layer core plate is more accurate and detection is facilitated, meanwhile, nanoscale micropores are formed in the copper foil through a laser technology to improve the flowing property of subsequent resin, and in the pressing process, pre-pressing and multi-stage pressing are set to improve the pressing accuracy; and in the second-stage pressing process, the dispersion direction of internal bubbles and the flowing direction of resin are improved through an ultrasonic device, a radiation heating device, a magnetic field assisting device and the like, the alignment accuracy and the pressing precision of the plate are further improved, and the machining efficiency is guaranteed.

Embodiments herein relate to a system for detecting bubbles in a fluid. In an embodiment, a fluidic system ventilation detector having an optical bubble sensor is included. The optical bubble sensor may include a light source, a light detector, and a sensor controller. The sensor controller may be in signal communication with the light detector and may be configured to detect bubbles based on a signal received from the light detector. The sensor controller may be further configured to estimate a throughput of the fluid based on the detected bubbles. Other embodiments are also included herein.

The invention discloses a coating and hot-pressing process of a PHA material, and belongs to the field of packaging material coating. The process comprises the following steps: tightly combining a molten PHA coating material with a base material through hot pressing; the PHA coating is further compacted through a hot press polish roller, and bubbles between the PHA coating and the base material are eliminated; then entering a cooling device, rapidly cooling through internal water circulation so as to cure the PHA coating, and meanwhile, spraying a trace amount of deionized water mist so as to prevent the base material from being dried and embrittled due to high temperature; entering a recrystallization zone, regulating and controlling the crystallinity of PHA, and balancing the mechanical property and degradation rate. The PHA can be well bonded with various base materials (such as paper, fabrics and films) in the hot pressing process, and an additional adhesive is not needed. Therefore, the technological process is simplified, and the cost is reduced. And the PHA can be uniformly coated on the surface of the base material through the hot pressing process to form a compact coating, so that the performance consistency of the product is ensured.

The utility model relates to the technical field of sieve plate structures, in particular to a desulfurizing liquid oxidation regeneration tower structure which comprises a tower body, a sieve plate used for preventing air bubbles from being gradually combined into large bubbles is arranged in the tower body, and a plurality of second through holes used for gas to pass through are evenly formed in the surface of the sieve plate at intervals. A pore diameter adjusting assembly used for accurately controlling the distribution and flowing state of air in the tower body is arranged in the sieve plate, the pore diameter adjusting assembly comprises a plurality of expansion plates, telescopic layers made of rubber materials are fixedly connected among the expansion plates, and the expansion plates are designed in a fan shape; and the expansion plate is slidably connected into the sieve plate, a plurality of first through holes are evenly formed in the surface of the expansion plate at intervals, and the first through holes and the second through holes are the same in aperture size. Compared with the prior art, the flue gas purification tower solves the problem that the flue gas purification effect is reduced due to the fact that the sieve plate in the tower body is not provided with an air passing hole diameter adjusting structure.

The utility model discloses a plastic water cooling head quick bubble removing structure which comprises a shell with a water inlet portion and a water outlet portion, a transduction cavity is formed in the shell, a plurality of partition plates are arranged in the transduction cavity in a staggered mode, one end of each partition plate is connected with the shell, a gap is formed between the other end of each partition plate and the shell to form a corner, and therefore a winding water flowing channel is formed. At least one first flow guide plate is arranged at the corner of the water flowing channel, the first flow guide plate divides the corner into at least two flow channels, the first flow guide plate is arranged at the corner of the water flowing channel to separate bubbles, and liquid continuously undergoes the flow dividing and cutting process in the flowing process, so that the bubbles are continuously divided and dispersed, and the bubbles are uniformly dispersed. The air bubbles cannot be gathered together and can flow out from the water outlet part, so that the air bubbles are removed, and the energy conversion effect is prevented from being influenced.

The invention discloses an optical glass smelting process prediction method, system, equipment and medium, and relates to the technical field of optical glass, the method comprises the following steps: obtaining smelting process data and bubble evaluation data of optical glass, and carrying out feature extraction on image data and ultrasonic reflection signals to obtain corresponding bubble features; based on a first preset model, obtaining a bubble level prediction model according to the bubble features and the level data; based on a second preset model, a bubble feature prediction model is obtained according to the smelting process data and the bubble features; and obtaining a target bubble level and a limiting condition, traversing at least one of the bubble density, the bubble area and the bubble depth based on a random network search algorithm, and calling the bubble level prediction model for prediction to obtain a bubble level, and taking the bubble parameter corresponding to the bubble level consistent with the target bubble level as a target bubble characteristic parameter. The method has the effect of reducing the cost of the glass smelting process.

The invention provides a 3D concrete pouring device and method for a fabricated member, relates to the field of concrete member processing, and aims to solve the problems of low construction efficiency and poor member quality during prefabrication of the concrete member at present, through continuous rolling of a stirring device of a conveying system, the uniformity of concrete can be kept, and material layering is prevented; it is ensured that the concrete still has good working performance when being conveyed to a pouring system; meanwhile, a three-axis movement assembly is arranged to control an output port in the tail end of the corrugated pipe to move in different directions, the function of automatic pouring can be achieved, and in the aspect of concrete compaction, the form of an integrated vibrating table is adopted. And through the vibration effect of the vibrating table, bubbles in the concrete rapidly float upwards and are discharged, and gaps in the concrete are reduced. The concrete is denser under the exhaust action, so that the compressive strength and durability of the concrete are improved.

To provide a soundproofing and sound absorbing material with good soundproofing performance that is lightweight and easy to handle.SOLUTION: The soundproofing and sound absorbing material has membranes containing cellulose nanofibers in inter-fiber spaces or air bubbles etc. of porous sheets.SELECTED DRAWING: None

An outdoor unit of an air conditioner according to the present disclosure includes a base panel in which an inlet hole and an outlet hole are formed; a compressor placed on the base panel; a heat storage tank having a refrigerant flow path through which the refrigerant discharged from the compressor flows and a water flow path for exchanging heat with the refrigerant flowing along the refrigerant flow path formed therein; a water pipe unit connected to the heat storage tank; a pump for supplying water to the heat storage tank; a vertical panel defining at least one of a side surface and a rear surface of the base panel and having an inlet hole and an outlet hole; a deaerator for removing air bubbles contained in the water passing through the heat storage tank, in which the water pipe unit may include a pump inlet pipe having one end portion connected to an inlet of the pump; a pump outlet pipe connecting an outlet of the pump and an inlet of the water flow path; a deaerator inlet pipe connecting an outlet of the water flow path and an inlet of the deaerator; and a deaerator outlet pipe having one end portion connected to an outlet of the deaerator; and in which the other end portion of the pump inlet pipe and the other end portion of the deaerator outlet pipe may be connectable to either a vertical panel or the base panel.

Disclosed is a dual slot die coater capable of discharging a coating solution through an outlet after removing air bubbles contained in the coating solution. The dual slot die coater according to the present disclosure includes a first air vent installed in the first manifold region and a second air vent installed in the second manifold region.

The invention discloses a method and a system for repairing freeze-thaw damage of power plant concrete. According to the invention, the combination of Portland cement and nano-silica in the repairing material enhances the compactness of concrete and reduces the number of capillary pores, and the silane coupling agent significantly improves the bonding strength between the repairing material and original concrete and ensures the long-term stability of a repairing layer; the alkali activator sodium hydroxide accelerates the hydration reaction of the cement, and improves the early strength and durability of the repair material; the antibacterial agent benzalkonium bromide effectively inhibits the growth of bacteria, prevents microorganisms from eroding the concrete, and prolongs the service life of the repair structure; the defoaming agent alkyl sulfate reduces bubbles in the repairing material and improves the compactness and impermeability of the concrete; tiny air bubbles are introduced into the air entraining agent polyethylene wax, so that the freezing resistance and the crack resistance of the concrete are enhanced, and the high efficiency and the reliability of a repair project in a complex environment are also ensured.

The invention relates to the technical field of image recognition, and discloses a glass fiber board production quality detection method and system, and the method comprises the steps: collecting a continuous infrared thermal image sequence through an infrared thermal imaging device; constructing a temperature difference image set; identifying a primitive region with an abnormal diffusion characteristic; further performing fitting enhancement and significance detection on the abnormal primitive region; and performing defect classification and quality judgment based on the regional feature vector. Compared with the prior art, the technical problems that in the prior art, high-precision parting judgment cannot be achieved under the conditions that the surface texture of a glass fiber board is complex, hot-pressing disturbance exists, particularly, hot diffusion behaviors of dry filaments, degumming and cavitation bubble defects are similar, and the false detection rate of a conventional algorithm is high are solved. Due to the fact that a multi-channel thermal diffusion consistency analysis mechanism and parallel discrimination logic based on feature vectors are introduced, infrared primitive anomaly enhancement detection and defect classification recognition under the complex background are achieved, and the accuracy of glass fiber board production quality detection is improved.

The invention provides a cleaning device for marinated food raw materials, and belongs to the technical field of marinated food processing.The cleaning device comprises a cleaning tank, a bubble generator arranged at the bottom of the cleaning tank, a conveying mesh belt used for moving the raw materials out of the cleaning tank and a spraying assembly arranged on the conveying mesh belt; a chain plate conveying belt is arranged below the material guide plate, a wave-shaped material plate is arranged below one end, far away from the material guide plate, of the chain plate conveying belt, through holes for air bubbles to pass through are formed in the wave-shaped material plate, and concave parts on the wave-shaped material plate are linearly arranged in the horizontal direction; and a rotating shaft is arranged in the concave part on the wave-shaped material plate. According to the device, it is guaranteed that raw materials are repeatedly turned over and cleaned in the concave portion of the wave-shaped material plate, the raw materials can pass through the concave portion of the wave-shaped material plate one by one to move forwards, the raw materials are in a dynamic cleaning state all the time, continuous cleaning blind areas are avoided, and the cleaning quality of the raw materials is improved.

The invention discloses a grouting device and method for a prefabricated concrete composite plate, comprising: a frame, a reciprocating mechanism, a vibrating mechanism, a grouting mechanism and a scraping mechanism. The frame comprises a C-shaped slide rail, two groups of C-shaped slide rails are provided, the two groups of C-shaped slide rails are located opposite to each other, both sides of the bottom of the two groups of C-shaped slide rails are fixedly connected with support columns, a sliding plate is slidably arranged between the two groups of C-shaped slide rails, a composite plate mold is detachably connected to the top of the sliding plate, and two groups of columns are fixedly connected to the outer sides of the two groups of C-shaped slide rails. The beneficial effects are: the reciprocating mechanism, the grouting mechanism and the scraping mechanism are arranged to cooperate so that the device can perform smoothing work simultaneously during grouting, and the vibrating mechanism is arranged to utilize four groups of vibrating columns to vibrate when the device is grouting and smoothing, so as to eliminate slurry gaps, and there is no need to manually eliminate gaps later. At the same time, bubbles in the slurry can be eliminated by vibration, so as to avoid hollowing of the finished composite plate and ensure the quality of the finished product.

The utility model provides a compressed air foam fire extinguishing device. The compressed air foam fire extinguishing device comprises a pressure container, a compressed air foam generating part, a driving unit and a foam release spray pipe assembly, wherein foam premixed liquid is preloaded in the pressure container; the compressed air foam generating part adopts a shunt damping principle; compressed air foam with a certain foaming multiple is formed in compressed air foam liquid released by the compressed air foam generating part based on the flow division damping principle, the particle size of water can be refined, the coverage area of the water can be increased, more heat can be absorbed, comburent can be efficiently cooled, the penetrating force is improved through the compressed air foam, and the heat efficiency is improved. And the flame retardant can rapidly permeate into comburent to prevent rapid chemical chain reaction in the combustion process.

The invention discloses low-carbon anti-crack concrete and a preparation method thereof, belongs to the technical field of concrete processing, and is used for solving the technical problem that the anti-crack performance and the mechanical performance of concrete in the prior art need to be further improved. The preparation method comprises the following steps: injecting a concrete precursor into a plastic test mold, putting the plastic test mold on a vibration table, and vibrating for 1-2 minutes, and curing to obtain the anti-crack concrete. The preparation method comprises the following steps: preparing modified composite fibers, modified epoxy resin and modified recycled coarse aggregate as reinforcing materials of concrete, preparing a concrete precursor together with recycled fine aggregate, fly ash, cement, a curing agent and an auxiliary additive, injecting the concrete precursor into a plastic test mold, vibrating to remove bubbles, and curing to obtain the anti-crack concrete. The anti-cracking performance of the concrete is improved, and the mechanical performance and the high-temperature resistance of the concrete are also improved.