24 results about "Air entrainment" patented 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.

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.

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.

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 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 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.

This invention relates to the field of concrete admixture technology, specifically to a multifunctional concrete admixture that combines toughening, air entrainment, and foam stabilization, and its preparation method. The method involves adding an emulsifier to water and heating the mixture to 35–45°C. Then, polymer monomers, an initiator, and an aqueous solution containing a macromolecular thickener and an air entrainer are simultaneously added dropwise, and the mixture is stirred for 0.5–1.5 hours. The temperature is then raised to 60–70°C, and the remaining polymer monomers and initiator are added, with continued stirring for 3–4 hours. The mixture is then cooled to room temperature to obtain the multifunctional concrete admixture. This multifunctional concrete admixture possesses toughening, air entrainment, and foam stabilization properties, improving not only the dispersibility of the admixture in concrete but also its stability, thus ensuring the performance of the concrete.

The invention discloses a metal casting machining and pouring device capable of preventing air holes from being generated, and belongs to the technical field of metal casting machining and pouring. The metal casting machining and pouring device comprises a bottom plate, a pouring gate, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a fifth connecting rod, the mold feedback mechanism comprises a fixing plate, when a mold is clamped through the fixing plate of the mold feedback mechanism, the size of the mold is synchronously fed back to the conical block, then the incomplete winding drum is driven to dynamically adjust the diameter, and when the mold is large, the diameter of the incomplete winding drum is decreased, the winding speed of a steel wire rope is decreased, and an inner pouring pipe slowly ascends; when the mold is small, the diameter of the winding drum is increased, the winding speed is increased, the inner pouring pipe synchronously ascends in an accelerated mode, a bottom opening of the inner pouring pipe is always close to the surface of molten metal, the problems of liquid flow turbulence, splashing and air entrainment caused by traditional high-fall pouring are avoided, the defects of internal air holes, surface pinholes and the like of castings are reduced, and the casting density is improved.

The invention relates to the technical field of casting forming, in particular to a turnover directional cooling casting forming system which comprises a forming frame, an arc-shaped frame arranged at the upper end of the forming frame, a supporting plate arranged at the upper end of the arc-shaped frame, a turnover mechanism, a turnover positioning assembly and an attaching heat conduction assembly, comprising a limiting plate arranged on a supporting plate, a sliding rod is welded to the lower end of the limiting plate, and a first heat conduction plate is welded to the lower end of the sliding rod. When the supporting plate is in a horizontal state, the supporting plate can be conveniently and stably placed in a mold cavity, when the supporting plate is in an inclined state and the mold cavity is filled with molten metal, the flowing path of the molten metal can be optimized by means of the gravity effect, the gas entrapment and slag inclusion phenomena are greatly reduced, the internal quality of a casting is improved from the source, and the rejection rate caused by defects is reduced.

The application discloses a double-shaft high-speed anti-settling dispersion disc and a high-speed dispersion machine, which comprises a main transmission shaft, a secondary transmission shaft, a main dispersion disc assembly and a secondary dispersion disc assembly; the main transmission shaft is a hollow shaft, the secondary transmission shaft is concentrically arranged in the main transmission shaft and rotates in the opposite direction; the main dispersion disc assembly is provided with upwardly-bent main dispersion teeth, a flow guide hole and a spoiler; the secondary dispersion disc assembly is provided with downwardly-inclined secondary dispersion teeth, a flow guide cone with a spiral flow guide groove and a plurality of anti-settling scrapers. The main and secondary dispersion discs rotate in the opposite direction to form an upper and lower two-layer forced convection circulation field, the flow guide cone and the anti-settling scrapers cooperatively push the materials at the bottom of the barrel upward to completely eliminate the bottom settling dead zone; the flow guide hole, the spoiler and the flow guide cone jointly inhibit the central vortex to greatly reduce the air entrainment; meanwhile, the counter torques generated by the double-shaft opposite rotation offset each other to reduce the vibration and energy consumption of the whole machine.

The invention relates to the technical field of polyurethane film winding, in particular to a winding device for processing a high-value thermoplastic polyurethane film. Comprising a machine frame, a winding mechanism composed of a winding frame and an air expansion shaft is installed on the machine frame, a rotary driving device is installed at a winding station on the machine frame, the air expansion shaft enables the rotary driving device to be in transmission connection with the air expansion shaft through a connecting device, and an abutting mechanism is installed on the side, close to the winding station, of the machine frame. The abutting mechanism comprises a mounting frame, a first abutting roller, a second abutting roller and a cleaning roller, the first abutting roller and the second abutting roller are elastically connected to the mounting frame through a self-adaptive adjusting mechanism, and the second abutting roller can deflect around an air expansion shaft on the winding station through a synchronous deflection device. According to the device, the rollers can be automatically replaced without shutdown, air entrainment is prevented and reduced, the extrusion force on a polyurethane film can be automatically and accurately adjusted, and the situation that the film is wrinkled, excessively stretched and the like in the winding process is avoided.

An environmental air management device comprises a housing comprising an air inlet through which air is drawn, an airflow generation unit configured to move the air through the housing, and an air entrainment assembly. The air entrainment assembly comprises an airflow director defining an air outlet at an end of the airflow director through which the air flows, and a collar. The collar has a first and second end, and extends at least partially around the airflow director. A perimeter of the air outlet has a greater length than a perimeter of the first end, thereby defining one or more airflow channels extending at least partially along the collar and between the collar and the airflow director. In use, ambient air is drawn at least partially along or across the one or more airflow channels and out of the first end of the collar.

The present invention provides a dry mix composition of a low-viscosity cellulose ether (50 to 750 mPa·s at 1 wt. % solids, at 20 C, and a 514 s-1 shear rate, using a strain-controlled rotational rheometer (for example, ARES-G2™, TA Instruments), a graded aggregate, and a hydraulic cement, or a granular wet cement composition of the cement, graded aggregate and an admixture therefor including the cellulose ether. The wet granular hydraulic cement composition behaves like asphalt compositions and has zero or near zero slump, a high lubricity and from 5 wt. % to less than 13 wt. % of water, or, preferably from greater than 5 to 10.5 wt. %, based on the total weight of the granular wet cement composition. The low-viscosity cellulose ether enables lubricity without impairing compaction and without causing air entrainment.

The invention relates to a mold for casting a shell mold hydraulic valve body end cover and a casting technology, and relates to the technical field of casting machining, the mold comprises a mold body, a cavity is formed in the mold body, a runner sand core is arranged in the cavity and fixedly connected with the mold body, a sprue gate is formed in the bottom of the mold body, and the sprue gate communicates with the cavity; the bottom pouring assembly comprises a pouring gate bottom plate and a vertical pouring pipe, a horizontal runner is formed in the pouring gate bottom plate, the length direction of the horizontal runner is arranged in the horizontal direction, the vertical pouring pipe is vertically arranged and located above the pouring gate bottom plate, and the lower end of the vertical pouring pipe is connected with the pouring gate bottom plate and communicates with the horizontal runner; the mold body is fixed on the pouring gate bottom plate, and the pouring gate is communicated with the horizontal runner. The phenomena of splashing, turbulent flow and air entrapment of molten metal in the cavity are reduced, and then secondary oxidation slag inclusion and air hole defects in a casting are reduced, so that the final casting forming quality of the casting can be improved.