360results about How to "Flow is easy to control" patented technology

The invention discloses a multi-material laser direct writing conformal system and a method. The system comprises a vacuum seal case, a multi-joint mechanical arm, a multi-material laser direct writing head and a control system for controlling the constituent parts, wherein the mechanical arm and the laser direct writing head are arranged in the vacuum seal case; the laser direct writing head comprises a direct writing head body, a laser and at least two groups of material cylinders; a material channel and a laser focusing channel communicated with the laser and the material cylinders respectively are arranged on the direct writing head body; and the at least two groups of material cylinders are arranged on the direct writing head body in parallel. A particular process is as follows: the mechanical arm drives a workpiece to move along a set path; a material controller selects the corresponding material cylinders; a discharge head delivers and allows materials to be attached to the surface of the workpiece; and at the same time, laser light emitted from the laser focusing channel carries out solidifying or sintering forming on the attached materials. According to the invention, a control process is simple, the forming precision is high, continuous production is achieved, and production efficiency is improved.

The invention discloses a paper-based microfluidic chip. The paper-based microfluidic chip comprises a paper-based chip and a paper-based substrate, wherein the paper-based chip is provided with a microfluidic channel, the paper-based substrate is correspondingly adhered to the bottom of the paper-based chip, and the paper-based chip and the paper-based substrate are respectively subjected to cross-linking and solidifying treatment through liquid glue. The invention also discloses a three-dimensional paper-based microfluidic chip which is formed by stretching or folding the paper-based microfluidic chip. The paper-based microfluidic chip disclosed by the invention has the advantages of low cost, easiness in preparation, controllable liquid flow and the like, and is applicable to microfluidic analysis experiments.

The invention discloses a plasma preparation method of spherical titanium powder for 3D printing. Titanium powder in an irregular shape is selected as the raw material; argon carries titanium powder particles to be sprayed into a plasma torch through a feeding gun; the titanium powder particles are rapidly heated and fused, and the fused particles form liquid drops with a high degree of sphericity under the action of surface tension; and crushing gas is introduced to crush the fused liquid drops again, the fused liquid drops are rapidly cooled and solidified to form spherical titanium powder particles under the two different progressively increasing temperature gradients, powder is separated from plasma gas due to the efficient filtering gas, and the spherical powder is collected through a powder collection device. The titanium powder prepared by the method is controllable in component, particle size and degree of sphericity; the prepared spherical titanium powder is high in degree of sphericity, good in mobility, uniform in size distribution, little in impurity, high in compactness, high in quality and used for 3D printing; the preparation process is rapid and easy, and one-time molding is achieved.

The invention belongs to the field of composite material forming technology and mainly relates to a liquid resin defoaming method and device for vacuum infusion forming of composite material. In the defoaming method, mixed liquid resin enters a defoaming device (13) and continuously flows over a plurality of layers of spiral laminar flow plates of the defoaming device; the defoaming device (13) is in a continuous vacuum state to increase the surface area of the liquid resin, even if the liquid level of the liquid resin becomes a thin layer with extremely small thickness, the pressure difference of the defoaming device instantaneously amplifies the volume of bubbles in the liquid resin, and the bubbles are removed quickly under the continuous vacuum state; and the liquid resin which is defoamed is directly connected to the vacuum infusion forming site of the composite material to carrying out infusion forming of a composite material product (9) in a vacuum state, and thus, the integration of defoaming and infusion of the liquid resin is realized.

The present invention relates to a vacuum-driven fluidic system for a flow-type particle analyzer. The system includes a vacuum pump which creates a pressure drop downstream of the flow cell, which pulls sheath fluid and sample fluid through the flow cell. A variable-resistance fluidic resistor is configured to control the ratio of sample fluid flow to sheath fluid flow. Dual feedback circuits, one configured to modulate the vacuum pump power in response to the pressure drop across the flow cell, referred to as the dynamic pressure drop, and a second configured to modulate the vacuum pump power in response to the pressure drop created by the vacuum pump relative to ambient pressure, referred to as the static pressure drop, are used to automatically control the system. The present invention enables adjustment of the sample fluid flow rate while maintaining a constant total fluid flow through the flow cell, and further, enables pausing the system without significant fluctuations in the vacuum.

The invention relates to a system for testing heat transfer and resistance characteristics of a large-size generating equipment heat exchanger. The system comprises a straight flow type air duct system, a circulating water system and a circulating oil system. The straight flow type air duct system inhales air, after heating, flow mixing and rectification, the air flows into the air cooling device; after heat exchange through an air cooling device tester, hot water is inputted by a water pump to a cooling tower for cooling, the cooled water is heated by an air heater to realize water temperature required by a test and then flows into a heat exchanger tester to form a temperature-controllable circulating water system; oil in an oil tank is heated, the heated oil flows into the heat exchanger tester, the oil after heat exchange flows into an oil storage tank to form the circulating oil system; the circulating water system and the circulating oil system respectively realize closed circulating and are used for testing heat transfer coefficients and resistance characteristics of the heat exchanger. The test system can test heat transfer and flow resistance characteristics of the air cooling device and an oil cooling device, can realize water cycle utilization and greatly saves resources.

A cooling system for removing heat from a heat source (38) located inside the aircraft to a radiator (32), having a piping system (10) sealed from the surrounding atmosphere, which is connected to an absorber carrying the heat source (38) The heat part (14) is thermally coupled to the heat output part (22) having a heat sink (32), and it preferably has a substantially insulated transfer part (21), the piping system (10) being filled with a heat transfer medium (12 ), when it absorbs heat from the heat source (38) in the heat absorbing part (14), the heat transfer medium undergoes a transition from a liquid to a gaseous state, and then flows into the heat output part (22), and there, when the heat is transferred to After discharge to the heat sink (32), it condenses again and flows back to the heat sink (14).

The invention relates to a controllable temperature water body total dissolved gas supersaturation generation and an experimental device for studying the influence thereof on fish. The device comprises an autoclave, an air inlet, an adjusting air valve, a safe air valve, an air gauge, a water inlet, a water outlet, a water pool provided with a temperature controller, a water pump, a first ball valve, a first flowmeter and a water inlet, wherein, the autoclave, the air inlet, the adjusting air valve, the safe air valve, the air gauge, the water inlet and the water outlet are arranged on the autoclave, and the water pump, the first ball valve, the first flowmeter and the water inlet are sequentially connected with the water pool; an air compressor is connected with the air inlet; the water outlet is sequentially connected with a second ball valve, a second flowmeter and a water channel; a total dissolved gas tester and a water quality monitor are arranged outside the water channel; and the water channel is communicated with the water pool via a latex tube. The invention generates water body featuring total dissolved gas supersaturation by autoclave sealing pressurization, and the whole device adopts circulating water and controls water temperature thereof to be constant. The invention can realize the control on measurement of major physical parameters, such as water temperature,water body pressure, airation content, flow and the like, which affects total dissolved gas supersaturation generation so as to quantificationally analyze the generation principle of total dissolved gas supersaturation and study the influence thereof on fish.

The invention relates to an automatic conducting-liquid bottling device which comprises a feed liquid tank, a bottle body tray, a support frame, a water pump, a liquid replenishing tank and an electric cabinet, wherein the feed liquid tank is arranged at the upper end of the support frame, a liquid level detecting device is arranged on the inner wall of the feed liquid tank which is communicated with the liquid replenishing tank through the water pump, a plurality of conveying pipes arranged at the bottom of the feed liquid tank are respectively communicated with a plurality of bottling heads on a beam in the middle of the support frame, the bottle body tray is arranged on the support frame below the bottling heads, the support frame is provided with a feed liquid flow control device used for controlling quantitative conveying of feed liquid, and the liquid level detecting device, the water pump and the control end of the feed liquid flow control device are connected with an electric control device in the electric cabinet. The automatic conducting-liquid bottling device provided by the invention has the advantages of simple structure and low cost, realizes quantitative bottling by using mutual matching of the liquid level detecting device, the feed liquid flow control device and the electric control device, can adapt to bottle bodies with different diameters and different heights, and is especially suitable for medium-small enterprises due to small integral occupation area.

The invention discloses a technical method for large-scale production of particles by a multi-nozzle module based on a 3D (three-dimensional) printing technique and application of the technical method. The technical method is characterized in that a single nozzle is of a coaxial annular gap air blowing structure, the middle part is provided with a fluid channel, and the coaxial annular gap is an air channel; on the basis of a two-phase flow cutting principle, liquid-phase liquid is cut by air, and liquid droplet particles are produced; by controlling air and liquid outlet pressures and flow rates, the liquid droplets with different particle sizes can be obtained; the number of nozzles can be designed according to the requirement of droplet output, and liquid and air are uniformly distributed by a distributor, so as to obtain higher droplet production efficiency. The technical method has the advantages that the preparation of 3D printing nozzle modules is simple, the material cost is low, and other complicated mechanical processing methods are not required; the prepared particles are free from the pollution by poisonous matters, such as a continuous phase and surfactants; the technical method is especially suitable for preparing high-viscosity solution and suspension droplets containing insoluble particles, is widely applied to the fields of medical care, petroleum, biology, environment protection and the like, and is suitable for large-scale industrial production.

The invention relates to a plaster base material system for 3D spray bonding fast forming technique, comprising composite base material and auxiliary bonder, where the composite base material is mixed uniformly of plaster powder, bonder, accelerator anhydrous calcium sulphate, dispersant, white carbon black, and intensifier; and the bonder is mixed of water base polyurethane glue, phenol resin, nonionic surface active agent, and alcohol cosolvent, dissolving in deionized water. And the composite base material and auxiliary bonder can completely meet use requirements.

The invention provides a high-conductivity aluminum alloy plate extrusion forming device and technology. The forming device is an extrusion mold which comprises an extrusion rod, an extrusion cylinder, a flow guide mold and a forming mold; an extrusion groove of the flow guide mold is designed to be inverted conical; and the shapes of the extrusion groove of the forming mold and a forming element are keep to be consistent. The forming technology comprises the steps of preparing aluminum alloy blanks, preheating a mold, spraying graphite, and extruding and forming an aluminum alloy plate. Metal materials provided by the invention are not formed once in the forming process, and are subjected performing and final forming; stress produced in the forming process is reduced; the deformation texture in the aluminum alloy plate is increased; and the conductivity performance and heat conduction capability of products are improved greatly.

The invention discloses equipment for dynamically simulating and testing the biodegradability of a medical magnesium alloy in vitro. The equipment comprises a thermostatic bath, a liquid storage tank, a circulating pump, a flow meter, a test chamber, an upper-level sample loader, a pipette and a backflow tube, wherein the pipette and the backflow tube are arranged in the liquid storage tank respectively; the liquid storage tank is arranged in the thermostatic bath; the flow meter and the test chamber are vertically fixed respectively; the upper sample loader is hung in the test chamber by a chamber top cover of the test chamber; and the pipette is connected with an inlet of the circulating pump, an outlet of the circulating pump is connected with the inlet of the flow meter, the outlet ofthe flow meter is connected with an inlet tube of the test chamber, and an outlet tube of the test chamber is connected with the backflow tube by matched water pipes respectively to form a liquid medium circulation path. The equipment has the advantages of compact structure, convenience of use, high university and the like. By the equipment, the influence of medium flow rate, components, temperature, pH value and the like on medium corrodibility and material degradability can be quickly and accurately tested and evaluated, the research and development efficiency and quality can be obviously improved, and the research and development cost can be obviously reduced.

The invention discloses a microfluid analysis box. The microfluid analysis box comprises a top cover, a pedestal and a microfluid structural zone positioned at the pedestal; the microfluid structuralzone contains a sample reception area, a sample storage zone, an incubation zone, a time valve, a detection channel, and a waste liquid zone; the time valve is a diversion groove formed by retardancebar structures which are staggered bilaterally, and a side view of each retardance bar presents a shape with a wide bottom and a narrow top.

The invention discloses a method for continuously treating dynamic sewage through photocatalysis. The method consists of earlier-stage pretreatment and photocatalysis treatment, and particularly comprises the following steps of: (1) introducing sewage into a coarse filtration container, and filtering insoluble substances in sewage; (2) putting an early-stage treating agent into filtered sewage; (3) introducing the sewage into a fine filtering container; and (4) introducing the pretreated sewage into at least two photocatalysis reactors which are connected in series, wherein light sources and photocatalysts used in the photocatalysis reactors are the same or different. In the method, continually-flowing practical sewage is treated dynamically, and a novel solution is provided for the treatment of mindustrial waste water; a complete pretreatment part is provided, so that poisoning of the photocatalyst can be prevented; the flow speed and flow of sewage are controllable, so that the influence of the treating time of each part on sewage treatment can be better monitored; and multiple photocatalysis reactors are connected in series, so that multiple light sources and photocatalysts can be selected and matched according to different pollutants.

The invention provides a microfluidic PCR chip and an operation method thereof. The microfluidic PCR chip comprises a matrix; a fluid control structure consisting of a cavity and a control body is arranged on the matrix. The microfluidic PCR chip also comprises a plurality of cavities constructed on the matrix, the top ends of all the cavities are provided with openings, the cavities are correspondingly connected with channels in the fluid control structure one by one respectively, and each cavity at least comprises a lysate tank loaded with a lysate, a washing buffer solution tank loaded witha washing buffer solution, an eluent tank loaded with an eluent, and a DNase-free water tank loaded with DNase-free water. On the basis of realizing the functions of fluid extraction, mixing and discharge, the microfluidic PCR chip saves the trouble of setting a separated storage or mixing cavity, reduces the operation steps, reduces the complexity of the chip, does not need externally-connectionlarge-scale equipment, reduces the cost of the chip, makes the chip suitable for being used as a disposable microfluidic chip, and has good practicability.

A cleaning device for internal combustion engine by way of suction force generated at the air-inlet tube of the engine is disclosed. The tapered air passage accelerates the air stream to produce a suction force, or a moveable or adjustable valve device to change the surface area of the air passage so as to control the effect of vacuum, and the cleaning solution is sucked into the air-inlet tube to clean away the accumulated carbon and debris in the valves or the internal combustion engine.

The invention provides a motor cooling structure, an air conditioner, and a motor cooling method. The motor cooling structure includes a motor, a refrigerant pipe, a control valve, a first temperature sensor, a second temperature sensor, and a controller, the refrigerant pipe is arranged on the motor, the first end of the refrigerant pipe is connected with an outlet main pipeline of a condenser of the air conditioner, the second end of the refrigerant pipe is connected with a gas-liquid separator of the air conditioner, the control valve controls the opening and closing of the refrigerant pipe, when the refrigerant pipe is opened, refrigerant of the air conditioner enters into the refrigerant pipe via the first end through the outlet main pipeline and flows into the gas-liquid separator via the second end after passing through the motor, the first temperature sensor detects the outlet pipe temperature of a cooling branch, the second temperature sensor detects the outlet pipe temperature of a four-way valve, and the controller adjusts the opening degree of the control valve based on the difference of the outlet pipe temperature of the cooling branch and the outlet pipe temperature of the four-way valve. According to the invention, the motor cooling effect of the air conditioner is improved, and the energy efficiency of the motor can be maximally performed based on the normal operation of the air conditioner.

The invention belongs to the technical field of quenching and cooling, and relates to a quenching and cooling device. The quenching and cooling device includes a quenching tank, a quenching bench, a quenching bench lifting system, a medium circulating system, a medium outlet system, a medium blowdown system, a cooling zone carrier roller, a power motor, a leading screw, a nut, a guiding sleeve, a guide rail, a circulating pump, a variable frequency motor, a liquid suction pipeline, a liquid suction port, a liquid discharging pipeline, an electronic flow meter, a cooler, an electric regulating valve, a flow controller, a medium outlet, a flow guiding plate, blades, a coaming plate, a fan and a fan cover, and the quenching bench lifting system includes the power motor, the leading screw, the quenching bench, a guide sleeve and the guide rail. The quenching and cooling device has the advantages of high automation degree, fast cooling speed, controllable cooling process, controllable flow, pressure and flowing direction of a cooling medium, uniform cooling, improvement of the product heat treatment quality, reduction of the loss of the cooling medium, reduction of the cleaning workload, increase of the working efficiency, ingenious and reasonable design of the overall structure, scientific principle, convenience in operation, convenience in use, good safety and reliability, and friendliness to application environment.

The invention provides a dispensing method and system capable of controlling the viscosity of photosensitive adhesives. According to the dispensing method, the viscosity of the photosensitive adhesives can be regulated in real time by controlling the radiation intensity of ultraviolet light, and then the photosensitive adhesives are dropped on workpieces to be dispensed through a dispensing pump. In the dispensing method, the workpieces can make three-dimensional space movement relative to the dispensing pump, and the dispensing quantity of the dispensing pump can be regulated according to the positions of the workpieces. According to the dispensing method and system capable of controlling the viscosity of the photosensitive adhesives, the viscosity of the photosensitive adhesives can be changed to control flowing of photosensitive adhesive fluid, and the forming processes such as dispensing and gluing can be conducted on non-planar surfaces, so that the dispensing method and system are suitable for forming under conventional conditions as well as forming under complex conditions; meanwhile, the aim of conveying high-viscosity photosensitive adhesive liquid is achieved, the problems of resin molecule degradation, bubbles and the like caused by high shear of strong extrusion are solved, the forming time is shortened, and the forming efficiency and product quality are improved.

The invention discloses a friction-stir welding tool which is characterized in that a six-helix groove is formed in the bottom surface of a stirring needle of a stirring head; a stationary shaft shoulder is connected with shaft shoulder fixing blocks through springs; the shaft shoulder fixing blocks are fixedly arranged on a welding machine; an electric heating device and a cooling medium passage are arranged and formed in the stationary shaft shoulder; and the electric heating device is arranged inside, close to the stirring head and the cooling medium passage is outside the electric heating device. When the friction-stir welding tool is used to repair a key hole defect, a key hole of a to-be-repaired workpiece is processed to be cylindrical, then continuous filling repair is carried out on the cylindrical key hole by using the stirring heads, the stationary shaft shoulders and filling pieces in different sizes. Compared with the prior art, the friction-stir welding tool has the beneficial effects that the grain size of a repair area is fined, the metallurgical bonding property and the mechanical property are good, the strength is high, the thickness of the repair area is not reduced, no material is spilled, the stress concentration phenomenon is few, and the friction-stir welding tool is free from defect depth limitation and is wide in application scope.