45 results about "Air entrainment" patented technology

The application discloses a solid droplet-based drag reduction ball preparation and testing method, and relates to the underwater drag reduction technical field.The preparation method comprises the following steps: performing decontamination treatment on the surface of a steel ball, configuring a PDMS solution and pouring the PDMS solution into a polytetrafluoroethylene mold with small holes with different curvature radii, performing vacuum degassing and solidification, and then peeling off to obtain solid droplet structures with different curvature radii, and bonding the solid droplet structures to the bottom of the steel ball.Through the regulation and control of the solid droplet curvature radius (2.5-10.8 mm) and the water entry speed, the high-speed camera technology is used to observe the change law of the sputtering crown formation, air entrainment and air cavity closure mode in the water entry process, the quantitative analysis of the underwater air cavity volume and the drag coefficient is combined, and the influence of the solid droplet curvature radius on the air cavity shape and the drag reduction performance is verified.The solid droplet structure optimizes the air film capture efficiency, significantly reduces the blunt body pressure difference resistance and the friction resistance, and the preparation process is simple, stable and suitable for the development of the underwater vehicle drag reduction technology.

The utility model belongs to the technical field of seawater desalination engineering, and particularly discloses a novel energy dissipation drain tank which comprises a drain chamber, a water inlet pipeline, a middle weir and a drain pipeline, the middle weir divides the drainage chamber into a water inlet section and a water outlet section, and two ends of the middle weir are provided with vacuum breaking side walls; the water inlet section can be selectively provided with a flow distribution column according to the water flow characteristic of inlet water; the water outlet section comprises an L-shaped baffle plate, a flow guide sill and a final-stage flow guide plate; the baffle plate is arranged at the downstream of the middle weir, and the bottom of the baffle plate is supported by a plurality of columns; and the flow guide sill is arranged at the downstream of the baffle plate. The energy dissipation drain tank has the advantages that the energy dissipation drain tank effectively consumes and disperses the energy of water flow by optimizing the structural design, and effectively solves the problems of larger water flow impact, inconvenience in pollutant cleaning and high cleaning cost of the drain tank by utilizing air bubbles carried by air in the flowing process, thereby ensuring the safe and stable operation of the drain tank.

Concrete and Method Relating Thereto Concrete including cement, graphene, and a superplasticiser having an air entrainment agent. The amount of air-entrainment-agent is no more than 2% by weight of the superplasticiser.

The utility model discloses a sampling device with pressure control, and aims to solve the problem of pressure unbalance of a freeze dryer in multiple sampling processes. The sampling device comprises a mounting connection assembly, a pressure control assembly and a sampling platform which are connected in sequence. The mounting and connecting assembly comprises a flange plate and a sampling channel and is used for communicating the sampling device with the freeze dryer; the pressure control assembly comprises a vacuum isolation valve and a U-shaped air entrainment valve and is used for controlling the pressure balance of the sampling device and the freeze dryer. The sampling device adjusts the opening degree of the air entrainment valve through a PID control algorithm, the accuracy and reliability of pressure control are ensured, and the operation efficiency is improved.

The utility model relates to the technical field of pouring devices, in particular to a pouring system for producing annular nodular cast iron blanks by precoated sand horizontal parting, which comprises a pouring cup for feeding, a filter box is connected above the pouring cup, and a filter plate for filtering impurities in molten metal is connected onto the inner wall of the filter box; one side of the filter box is connected with a straight flow channel plate used for conveying molten metal, and a step channel used for smooth transition of the molten metal is formed in the straight flow channel plate. According to the pouring system for producing the annular nodular cast iron blank through precoated sand horizontal parting, when molten metal flows into the forming mold through the tangential inner pouring gate, the molten metal forms a rotational flow state, and turbulent flow air entrapment is reduced; by means of the stepped ladder way, molten metal is affected by gravity and evenly flows out of the liquid outlet, and the molten metal is in smooth transition.

The present application belongs to the technical field of water treatment, and specifically relates to a siphon valveless filter tank for water treatment and a backwashing method. The filter tank comprises a filter tank main body, a water inlet system, a filtering system, a backwashing system, a clean water collecting system and a control valve assembly. The inside of the filter tank is provided with, from top to bottom, a clean water area, an ultra-high space, a sand washing tank, a filter material layer, a supporting layer, an air-water distributor and a water distribution area, and a vertical shaft water distribution channel is arranged in parallel on the side. The water inlet system eliminates the air entrainment phenomenon through the vertical shaft water distribution channel. The backwashing of the filter tank comprises two modes of hydraulic automatic control and program control, and both modes integrate air-water combined backwashing operation. The present application combines the advantages of homogeneous filter material deep bed filtration and hydraulic automatic control, realizes air-water combined backwashing, and efficiently removes impurities in the filter layer. The filter tank has compact structure, is easy to operate and maintain, and can expand the treatment capacity of a single tank as needed, and is suitable for water treatment scenes such as water supply treatment, sewage treatment and water purification, and is especially suitable for new construction and old plant reconstruction of medium and small water plants.

The invention discloses an air separation pre-cooling system and an air cooling method. The air separation pre-cooling system comprises a tower body, a compressed air assembly, a water circulation assembly and a waste nitrogen assembly. A liquid storage part for storing circulating water is arranged at the bottom of the tower body; the compressed air assembly comprises a cooling coil, and the cooling coil is fixedly mounted in the tower body and used for introducing high-temperature and high-pressure air; the water circulation assembly comprises a water inlet pipe, a water outlet pipe and a driving pump, one end of the water outlet pipe is communicated with the top of the tower body, the other end of the water outlet pipe is connected with an outlet of the driving pump, and one end of the water inlet pipe is connected with an inlet of the driving pump; the waste nitrogen assembly comprises a nitrogen inlet pipe, the nitrogen inlet pipe is connected with the tower body and is used for introducing dry waste nitrogen into the tower body, circulating water sprayed from the upper part of the tower top is used for cooling air in the cooling coil, and the dry waste nitrogen is used for evaporating and cooling the circulating water. The device can prevent air entrained with liquid water from entering the purification system, improves the working efficiency of the pre-cooling and purification system, saves energy consumption, and reduces the occupied area.

A simulation device for generating a supersaturated total dissolved gas (TDG) in a flood discharge and energy dissipation region of a dam is provided. The simulation device includes a reactor, a water inlet system, a gas inlet system, a venting system, a water drainage and gas exhaust system, a monitoring system, and a control system. An observation window is defined on the reactor, and a magnetic stirring assembly is installed inside the reactor. The cooperation of the water inlet system and the gas inlet system quantitatively controls a mass flow rate of water and gas entering and exiting the reactor, controls the change and variation of a temperature and a pressure inside the reactor, simulates the process of generating supersaturated TDG in the flood discharge and energy dissipation region by injecting water flow with varying air entrainment concentrations, and simulates changes in supersaturated TDG concentrations under varying pressure conditions.

The invention relates to the technical field of building materials, in particular to a coagulator, gasified slag mortar and a preparation method thereof. The invention provides a coagulator which is prepared by mixing the following chemical components in percentage by mass: 43%-45% of a C6 polycarboxylate superplasticizer, 27%-32% of sodium lignin sulfonate and 28%-30% of an organic silicon defoaming agent, and the sum of the mass percentages of the chemical components is 100%. The coagulant disclosed by the invention has excellent multiple synergistic effects of water-reducing dispersion, delayed coagulation and water retention and stable air entraining. Aeolian sand, industrial solid waste slag, cement and fly ash are used as raw materials, and the coagulator is applied to preparation of the gasified slag mortar, so that the problem of low utilization rate of gasified slag is solved, the bleeding rate of the gasified slag mortar is remarkably reduced, the initial setting time is shortened, and the early and later compressive strength is improved; the technical problems of slow solidification and low strength of the gasified slag mortar are solved, and an efficient scheme is provided for recycling industrial solid wastes.

A system and method, according to one or more exemplary embodiments, for a fireproof, soundproof, lightweight cement and wood composite wall system that is very inexpensive, outlasts wood frame homes, and replaces many building materials in one installation whereby the composite wall system may be formed from wood shavings, cement, calcium chloride, and water mixed at high speed for air entrainment.

The utility model discloses a stirring, spraying and filtering device for casting coating, which belongs to the technical field of sand mould spraying and comprises a coating pool and a filtering component, the coating pool is used for containing the coating, a spraying component is arranged in the coating pool and sprays the coating in the coating pool onto a sand mould, and the filtering component is connected with the coating pool. The coating in the coating pool is filtered through the filtering assembly, and the filtered coating flows back to the coating pool to wash the spraying assembly; a stirring assembly is arranged on the coating pool, can swing relative to the coating pool and makes contact with the bottom wall of the coating pool. According to the utility model, not only can the functions of stirring, filtering, spraying and mould cleaning be performed on the casting coating, but also the air entrainment can be reduced, the uniformity, leveling property and adhesiveness of the coating are improved, and the long-term problems that the coating is not stirred thoroughly, the coating performance is reduced, large-particle sand and impurities in the existing coating remain and the like are solved; therefore, the casting quality is improved.

The present invention discloses a low-pressure casting device with a constant liquid level and without a riser tube, comprising a double-chamber insulation furnace, the double-chamber insulation furnace comprising a riser chamber and a pressurizing chamber, a connecting channel being provided between the riser chamber and the pressurizing chamber, a control component for controlling the opening and closing of the connecting channel being provided on the connecting channel, a first heater and a second heater being provided at the bottom of the riser chamber and the pressurizing chamber respectively, a feeding port, a pressurizing pipe and a pressure relief pipe being provided on the pressurizing chamber, a bypass component for adjusting the pressure of the riser chamber being provided on the upper side of the riser chamber; the nitrogen supply and control system comprising a nitrogen generator, a control valve group and a control system for controlling the control valve. A casting method based on the above-mentioned device is also provided. The present invention solves the problem that during the filling process of molten metal, the molten metal fluctuates greatly with pressurization and pressure relief, oxide scale is generated between the molten metal and the furnace body, affecting the quality of the molten metal, and the filling speed is unstable, resulting in air entrainment in the product.

This utility model discloses a stirred tank for preventing air bubble entrainment, relating to the technical field of stirred tanks. It includes a tank body, vertical baffles, a transverse baffle, and a stirring mechanism. The stirring mechanism is housed within the tank body, and at least two vertical baffles are vertically arranged on the side wall of the tank body, with the short sides of the baffles arranged radially along the stirring rod of the stirring mechanism. A transverse baffle is located within the tank body at the liquid surface. This utility model's stirred tank structure for preventing air bubble entrainment effectively interrupts the path of gas being drawn into the liquid from above by placing a transverse baffle near the liquid surface, reducing liquid surface disturbance and suppressing gas entrainment. This solves the problem of weak anti-air entrainment capability of traditional baffle structures.

This invention relates to the field of electroplating solution ratio adjustment technology, specifically to an electroplating solution ratio adjustment device for precise control of bump height. The device includes an upper vibration mechanism for containing the main solution and generating mixing and defoaming vibration forces. The upper vibration mechanism includes an upper liquid box and a rotating component, a guiding control component, and a vibration triggering component disposed within the upper liquid box. A lower housing mechanism supports the upper vibration mechanism and facilitates solution discharge. This lower housing component includes a vibration isolator between it and the upper vibration mechanism. This invention achieves a high degree of synergy between submerged injection and dynamic defoaming stirring. Simultaneously with the injection of the auxiliary solution, mechanical energy conversion triggers high-frequency vibration and swirling mixing, preventing air entrainment at the source and instantly eliminating microbubbles, ensuring high uniformity and purity of the solution components, thereby achieving nanometer-level precise control of the electroplating bump height.

A method for preparing a graphene-nanosheets based concrete additive is disclosed. The method comprises mixing Polycarboxylate ether A (PCE-A) to a retarder-based salt solution to obtain a retarder-based Polycarboxylate ether A solution. In the next step, a retarder based PCE solution is obtained by adding Polycarboxylate ether B to the retarder based Polycarboxylate ether A solution to which graphene nanosheets are added. Further, an air entrainment agent is added to graphene nanosheets based PCE solution and further mixed to obtain the graphene nanosheets based concrete additive.

The utility model discloses a kind of defoaming devices, it is related to laundry detergent production technical field.When laundry detergent is stirred, the fluctuation amplitude of laundry detergent liquid level is larger, leading to the increase of liquid phase air entrainment, thereby intensifying foam generation, so that the efficiency of device defoaming is reduced, thereby affecting the use effect of device.The utility model includes device main body and processing mechanism, processing mechanism is arranged inside device main body, processing mechanism includes the threaded rod of being set at the top end inside device main body.This utility model is provided with device main body, processing mechanism, threaded rod and buoyancy plate, threaded rod can be rotated by rotating driving handle, so that fixed seat can be driven to move up and down, buoyancy plate can be conveniently floated on the surface of laundry detergent, when buoyancy plate contacts liquid surface, physical barrier layer is formed using liquid surface tension, effectively suppress the foam generated due to liquid violent disturbance in stirring process, improve the practicability of device.

A concrete comprising cement, graphene, a superplasticiser, and an air entrainment agent, wherein an air entrainment agent amount is no more than 2% by weight of a superplasticiser. The air entrainmen

The invention relates to the technical field of water conservancy and hydropower engineering, and discloses an optimized structure and an arrangement method.The structure comprises a plurality of discrete aeration units arranged on a bottom plate in an array shape in a staggered mode, and each unit comprises a vortex generator and an expansion tail groove which are sequentially connected in the water flow direction; the vortex generator is of a solid structure protruding out of the bottom plate, the two side wall faces of the vortex generator shrink in a hyperboloid streamline mode to induce flow vortexes, and a cavity is formed in the vortex generator and communicated with the air supply system downwards. The expansion tail groove is a groove body sunken in the bottom plate, the transverse width of the expansion tail groove is gradually increased in the flow direction so as to be matched with the divergence angle of a flow direction vortex, the bottom face of the expansion tail groove is lifted in an exponential curve mode in the flow process, and a ventilation gap is formed in the junction of the downstream face of the vortex generator and the starting end of the expansion tail groove. The expansion tail groove is shielded by the shearing layer of the flow vortex so as to maintain a low-pressure air cavity in the groove, air is actively injected into a vortex core through lifting of the bottom slope of the tail groove, and uniform and efficient air entrainment cavitation reduction protection in the whole wide area is achieved.

The utility model discloses a powder conveying system which comprises a feeding station. The feeding station is connected with the weighing bin, an air inlet valve of the weighing bin is connected with the nitrogen buffer tank group, the nitrogen buffer tank group is connected with the vacuum pump, and the vacuum pump is used for conveying nitrogen into the weighing bin; and the stock bin is connected with the weighing stock bin, and the weighing stock bin is used for conveying the weighed materials to the stock bin. By arranging the feeding station, the weighing stock bin, the stock bin, the roots vacuum pump, the buffer tank, the heat exchanger and the like, it is ensured that materials cannot leak in the conveying process. In the feeding process, dust entrained in air is discharged through equipment such as a dust removal filter and a Roots blower, and dustless operation is achieved. In the feeding process, nitrogen replacement is carried out on the stock bin, air is exhausted, air and materials are prevented from being mixed, it is ensured that the materials are reacted and weighed in the oxygen-free environment, an automatic metering mode is adopted, personnel feed the materials into the stock bin, automatic metering is carried out, and errors caused by manual operation are avoided.

The application relates to the technical field of concrete admixtures, and particularly discloses a waterproof dense type accelerating agent as well as a preparation method and application thereof, which comprises the following components in parts by weight: 5-10 parts of a suspending agent, 50-250 parts of modified silica sol, 100-250 parts of an organic complex waterproof agent, 400-600 parts of an accelerating agent and water; wherein the modified silica sol is obtained by modifying acidic silica sol by a modifier, and the modifier is a silane coupling agent; and wherein the organic complex waterproof agent is an aluminum complex of a higher fatty acid. The waterproof dense type accelerating agent of the application can not cause a large amount of air entrainment of concrete after being mixed into the concrete, can fill microcracks of the sprayed concrete, and can improve the compactness of the concrete; meanwhile, the waterproof effect is formed on the inside and the surface of the sprayed concrete; and the addition of the organic complex waterproof agent can promote the coagulation of the concrete, and the accelerating agent can realize the rapid coagulation of the concrete.

The present invention proposes an automatic high-pressure die-casting gate design method based on computer simulation, comprising: obtaining a two-dimensional projection of a three-dimensional model, including: projecting the three-dimensional grid corresponding to the casting onto six planes in a Cartesian coordinate system with the positive and negative directions of the x, y, and z axes as normal vectors; gate parametric design, including: automatically defining the location for placing the gate on the three-dimensional grid corresponding to the casting; gate design optimization, including: generating a parametric gate using a discrete optimization algorithm based on die-casting simulation, including: first randomly generating a series of gate designs, and then using the above-generated gate designs for die-casting simulation calculations; generating a new design using an optimization algorithm based on the final air entrainment corresponding to different designs calculated by simulation to reduce the air entrainment; and after performing a series of iterations, selecting the design with the smallest air entrainment as the final design.

The scheme discloses the alloy foundry technical field's a kind of large-volume alloy pouring device, including frame, the frame is rotatably connected with pouring tank, pouring tank is connected with the drive that it rotates, the bottom of the pouring tank is sealingly communicated with buffer bin, the buffer bin is the diameter-reducing cavity structure of wide top narrow bottom, multiple equidistant distribution's shunt screen plate are equipped in buffer bin from top to bottom, the bottom of the buffer bin is equipped with limited flow outlet nozzle.The device of the scheme is through double diameter-reducing cavity cooperation gradient aperture shunt screen plate and multistage pressure stabilizing outlet structure, effectively balance the pressure and flow rate in large-volume alloy liquid pouring process, inhibit turbulent air entrainment phenomenon, avoid casting porosity defect, improve the pouring stability and finished product quality of large-volume alloy casting.

The invention discloses a composite plateau concrete air entraining agent as well as a preparation method and application thereof, and belongs to the technical field of concrete admixtures. An existing rosin air entraining agent is subjected to amine oxide modification, an amine oxide group is introduced into abietic acid, the volume of a hydrophobic group can be increased, and therefore the air entraining capacity of the rosin air entraining agent is improved, and meanwhile the air stabilizing effect of the air entraining agent is improved through a rigid plane framework of the abietic acid; the nano particles can be almost irreversibly adsorbed on a gas-liquid interface to form a compact particle layer with high mechanical strength, the performance of stabilizing bubbles is achieved, the nano particles are subjected to amine oxide modification, the rosin air entraining agent and the modified nano particles can be self-assembled into a more stable system, and the air entraining effect is improved. The coalescence of bubbles and Ostwald ripening are effectively resisted, so that excellent stability is obtained; the hard water-resistant component can effectively resist the problem that hard water in a plateau area is difficult to bleed air; the three components cooperate to reduce the critical micelle concentration of the air entraining agent and increase the stability of bubbles.

The invention discloses a bulb through-flow turbine abrasion air entrainment and corrosion reduction testing device, relates to the technical field of water turbine air entrainment, and solves the problem of air entrainment and corrosion reduction of a bulb through-flow turbine. The system comprises a model water turbine air-entrainment and cavitation-reduction testing system, a second water storage tank, a particle storage box and a compression system, a plurality of air-entrainment holes are formed in the model water turbine air-entrainment and cavitation-reduction testing system, and the compression system is communicated with the air-entrainment holes to ventilate the model water turbine air-entrainment and cavitation-reduction testing system; the second water storage tank is communicated with the inlet end of the model water turbine air entrainment and cavitation reduction testing system, a particle storage box is arranged on a connecting pipeline, and water in the second water storage tank and particles in the particle storage box are mixed and then led into the model water turbine air entrainment and cavitation reduction testing system. According to the method, under the complex working condition of silt abrasion of the water turbine, abrasion of flow passage components of the water turbine is relieved by adding a certain content of gas to different parts of the water turbine, and the corrosion reduction effect is accurately tested.

The utility model relates to the technical field of household appliances, and particularly discloses a gas nozzle assembly and a gas stove. The fuel gas nozzle assembly comprises a nozzle body and a nozzle seat, the nozzle seat comprises a mounting part, a fuel gas channel is arranged in the mounting part, the nozzle body is connected to the gas outlet end of the fuel gas channel, an air channel is further arranged in the mounting part, and a gas outlet of the air channel is formed in the periphery of the gas outlet end of the fuel gas channel and faces the same side with the gas outlet end of the fuel gas channel. In the gas injection process of the nozzle body, due to the air pressure difference and other reasons, external air is introduced to be mixed with gas for combustion, a spacing distance exists between the air channel and the gas channel, and the air outlet of the air channel and the gas outlet of the nozzle body are located on the same side. And air flowing out of the air outlet of the air channel can be introduced under the action of high-speed circulating fuel gas, so that the amount of the injected air is increased, better mixing of the gas and the fuel gas is facilitated, and the mixing effect of the fuel gas and the air is better facilitated.

The utility model is suitable for the technical field of automobile aluminum alloy bracket production, and provides a pouring gate system for exhausting and deslagging of an automobile aluminum alloy bracket for die casting, which comprises a material handle, a pouring gate part is arranged on one side of the material handle, a product part is arranged on one side of the pouring gate part far away from the material handle, and exhausting parts are symmetrically arranged on the product part along the central axis; the pouring gate part comprises a main pouring gate, a first turnoff is arranged on one side, far away from the material handle, of the main pouring gate, a second turnoff is arranged on one side, far away from the first turnoff, of the main pouring gate, a third turnoff is arranged on one side, far away from the second turnoff, of the main pouring gate, and a fourth turnoff is arranged on one side, far away from the third turnoff, of the main pouring gate; the product part comprises a product body. The device solves the problems of difficulty in cleaning, higher cost and easiness in blockage, and achieves the functions of reducing air entrapment generated by die casting, avoiding local cold shut or air holes of a product, improving the product precision, ensuring smooth exhaust every time, ensuring the filling uniformity and improving the filling synchronism.

The utility model discloses an evanescent mode casting mould which comprises a box body, an inner sand mould and an outer sand mould are arranged in the box body, a cavity is formed between the inner sand mould and the outer sand mould, a sprue is arranged on one side of the cavity, one end of the sprue penetrates through the outer sand mould, the other end of the sprue is communicated with a cross gate arranged at the bottom of the cavity, and the cross gate is connected with flow gates at two ends of the cavity. And the cavity is communicated relative to the inner gate and the bottom of the cavity through a plurality of mold filling auxiliary structures. According to the utility model, the problems of slag entrapment, gas entrapment and cold shut caused by downward flowing of molten iron in the mold in the pouring process can be avoided.

The utility model belongs to the technical field of diesel engine nozzles, and particularly relates to an intensified diesel engine strong air entrainment type nozzle flow testing device which comprises a workbench, a fixing plate is fixedly installed on the top of the workbench, supporting plates are fixedly installed on the two sides of the top of the fixing plate, and placing plates are installed in the supporting plates. A clamping opening is formed in the top of the containing plate, an oil nozzle body is clamped in the clamping opening, a measuring cup is installed at the bottom of the clamping opening, and a butt joint assembly is arranged at the bottom of the containing plate. According to the embodiment, a plurality of oil nozzle bodies are installed in a plurality of bayonets respectively, the closing cover abuts against the top of the measuring cup, the spring is extruded to apply downward force to the closing cover, the closing cover can tightly close the measuring cup, and the oil nozzle bodies are inserted into the measuring cup through the butt joint openings. The problem that diesel oil splashes when the oil nozzle body sprays the diesel oil is solved, and the diesel oil sprayed by the oil nozzle is completely received.

A gas venturi connector includes a venturi body having an open first end and an opposing second end that includes a gas port for connection to a supplemental gas source. The venturi body includes a first air entrainment window and a second air entrainment window spaced from the first air entrainment window. Each of the first entrainment window and the second air entrainment window has an L-shape. The connector also has a movable shutter that rotates about the venturi body and includes a third air entrainment window and a fourth air entrainment window spaced from the third air entrainment window, wherein registration between the first and third air entrainment windows and the second and fourth air entrainment windows define a degree of air entrainment and the concentration of the supplemental gas delivered to the patient.