17results about How to "Flow state is stable" patented technology

The invention is applicable to the technical field of microwave plasmas, and provides a normal-pressure microwave plasma jet device which comprises an outer conductor, an inner conductor coaxially arranged in the outer conductor, a nozzle in threaded connection with the bottom end of the outer conductor, a pin at the end of a radio frequency connector connected with the inner conductor through a connecting conductor, and a gas pipe joint in threaded connection with the outer conductor. The short-circuit plug screw is in threaded connection with the top end of the outer conductor, a short-circuit reflecting surface is arranged at the bottom of a connecting piece installed in the short-circuit plug screw, and the air guide ring is nested on the inner conductor and located between the radio-frequency connector and the air pipe joint; the scheme is simple, reliable and low in cost, stable normal-pressure microwave plasma jet can be obtained without configuring a complex control module to adjust the impedance matching degree of the system, the gas flowing state can be more stable, plasma at an outlet is prevented from being affected, the short-circuit reflecting surface is further designed to be in a threaded up-and-down adjusting mode, and the service life of the system is prolonged. And the impedance matching effect is achieved by finely adjusting the short-circuit reflecting surface.

The invention belongs to the technical field of grinding equipment, and discloses a high-energy jet mill with a pressurizing structure, the high-energy jet mill comprises a base and a fixing plate, the fixing plate is fixedly mounted at the top of the base, a grinding bin is fixedly mounted in the fixing plate, and a first ventilation pipe is fixedly mounted on the outer wall of the grinding bin; and a main airflow pipe is fixedly mounted on the inner wall of the grinding bin. When the two sets of pressurizing bins conduct airflow supply operation, the other two sets of pressurizing bins can compress air in the pressurizing bins through piston movement of piston rods, so that when a pressurizing airflow pipe is aligned with the pressurizing bins, the compressed air can improve the contact pressure between airflow grinding materials and the surface of a machined material, the speed of pressurized airflow is higher, and the working efficiency is improved. Compared with the prior art, the impact frequency on the surface of the machined material is larger, the machining time can be remarkably shortened, the production efficiency is improved, the production cost is reduced, and more importantly, the grinding effect of the material is better, and grinding is more thorough.

The invention discloses a spleen artery blood flow limiting stent and a using method, and particularly relates to the technical field of medical instruments.The spleen artery blood flow limiting stent comprises a supporting stent and a flow limiting stent, the supporting stent is arranged outside the flow limiting stent in a sleeving mode, the two ends of the flow limiting stent are fixedly connected with the inner side wall of the supporting stent, and the flow limiting stent is a covered stent; the flow limiting support comprises a contraction section and an expansion section, the contraction section and the expansion section are fixedly connected and communicated, and splenic artery blood flow in the supporting support flows in from the contraction section and flows out from the expansion section. According to the invention, spleen blood perfusion after partial spleen artery embolism operation can be reduced, and recurrence of splenic hyperfunction is reduced.

The embodiment of the present application provides a granulator for Fischer-Tropsch wax, which relates to the technical field of Fischer-Tropsch wax processing. A granulator for Fischer-Tropsch wax comprises: an extrusion granulation mechanism, a raw material stirring and heating mechanism, the raw material stirring and heating mechanism is located at the upper part of the front end of the extrusion granulation mechanism, a transmission mechanism, the transmission mechanism is located at the front end of the extrusion granulation mechanism, the transmission mechanism is located at the lower end of the raw material stirring and heating mechanism, the extrusion granulation mechanism drives the transmission mechanism to rotate while extruding and granulating, and an intermittent feeding mechanism, the intermittent feeding mechanism is located at the front end of the extrusion granulation mechanism, and the intermittent feeding mechanism is located inside the transmission mechanism. The Fischer-Tropsch wax solution in the raw material stirring and heating mechanism can flow into the extrusion granulation mechanism intermittently and evenly to avoid uneven distribution of materials. At the same time, three negative pressure feeding boxes work alternately to ensure continuous supply of solution and provide buffer time for the heating mechanism, thereby improving the efficiency of the granulation system.

This utility model discloses a throttling structure, a refrigeration system, and refrigeration equipment, belonging to the field of household appliance technology. The throttling structure includes a first throttling tube, an expansion tube, a second throttling tube, and a packing element. The first throttling tube connects to the condenser; the inlet of the expansion tube connects to the outlet of the first throttling tube, and the inner diameter of the expansion tube is larger than that of the first throttling tube; the inlet of the second throttling tube connects to the outlet of the expansion tube, and the outlet of the second throttling tube connects to the evaporator, and the inner diameter of the second throttling tube is smaller than that of the expansion tube; the packing element is made of a porous material and is disposed inside the expansion tube, configured to allow refrigerant flowing from the first throttling tube to pass through and flow to the second throttling tube. This utility model reconstructs the gas-liquid two-phase flow through the packing element, promoting uniform mixing of the gas and liquid phases, transforming the violent and concentrated flash evaporation process into a smooth and controllable phase change process within the packing element, thereby suppressing noise generation.

The utility model relates to the technical field of tundish flow control, in particular to a magnesium flow stabilizer for a tundish, which comprises a hollow magnesium body, the top of the magnesium body is provided with an opening, the inner bottom of the magnesium body is provided with a corundum drainage body coaxial with the magnesium body, and the corundum drainage body is provided with a circular top surface; wherein the inner bottom surface of the magnesian body is an arc-shaped surface which is in smooth transition with the inner wall surface of the magnesian body and the outer wall surface of the corundum drainage body; by means of the smooth arc transition design of the inner bottom face of the magnesium body and the outer wall face of the corundum drainage body, turbulence and local scouring during flowing of molten steel are effectively reduced, the high hardness characteristic of the corundum drainage body is combined, erosion to the magnesium body is remarkably reduced, and the service life is prolonged. The inner wall face of the magnesium body is designed to be a conical face, the flow speed of molten steel is guided to be evenly distributed, and local scouring aggravation caused by sudden change of the flow speed is avoided.

The utility model relates to the technical field of fiber processing, and discloses extrusion equipment for processing high-performance fiber products, which comprises a screw extruder, the screw extruder is provided with a feed port and a discharge port, a screw which is coaxially arranged in a centering manner and is driven by a motor is mounted in the screw extruder, and a spiral auger is mounted on the screw; the spiral auger comprises a feeding section close to the feeding port and a staggered-tooth shearing section close to the discharging port, the feeding section and the staggered-tooth shearing section are connected with each other, and the screw pitch of the feeding section is larger than that of the staggered-tooth shearing section. The screw pitch of the feeding section of the spiral auger is large, fiber materials can be rapidly conveyed, feeding smoothness is guaranteed, the screw pitch of the staggered tooth shearing section is small, and therefore melt pressure is balanced, pressure fluctuation is reduced, fiber melt extrusion is more stable, fibers are more evenly distributed in the melt, the mixing effect of the fibers is effectively improved, and the mixing efficiency of the fibers is improved. And the quality stability of the product is improved.

The utility model discloses a kind of turbulence block and milk bubble whipping container, it is related to the technical field of beverage making equipment, the turbulence block includes turbulence part and connecting part, one side of the turbulence part is connected with the connecting part, and the other side is equipped with shunt end face;Wherein, the turbulence part is equipped with turbulence face for meeting water flow impact, the turbulence face is equipped with concave arc surface, and the concave arc surface is located between the connecting part and shunt end face.The utility model is simple in structure, and mixing effect is good.

The invention discloses a particulate matter cutter efficiency calibration device which comprises a rack, a mounting cavity is formed in the rack, an air inlet pipe is arranged at the upper end of the mounting cavity, an aerosol atomizer is arranged at the upper end of the air inlet pipe, and a dilution gas circuit and a drying device are further connected between the air inlet pipe and the aerosol atomizer. The lower end of the air inlet pipe is connected with an air path shunting joint, a particulate matter cutter and a calibrated total dust concentration detection instrument are fixed in the mounting cavity, at least two shunting pipe joints are arranged on the air path shunting joint, one shunting pipe joint is communicated with an air inlet of the total dust concentration detection instrument, and the other shunting pipe joint is communicated with an air inlet of the particulate matter cutter; an air outlet of the particulate matter cutter is connected with an air outlet pipe, the air outlet pipe is communicated with the vacuumizing power device, the air outlet pipe is further provided with a sampling port, a sampling pipe is arranged in the sampling port, the sampling pipe is connected with a standard particulate matter concentration detection instrument, and the device can quickly and accurately calibrate the cutter.

The utility model discloses a kind of anti-blocking devices of building water supply and drainage pipeline, including water pipe one, the one side of water pipe one is provided with anti-blocking box, the one side of anti-blocking box is provided with water pipe two, the one side end face of anti-blocking box towards water pipe two is fixedly installed with filter screen, the one side of filter screen is provided with scraping component, the scraping component includes round plate and arc-shaped scraper, the other side of filter screen is provided with driving assembly, the driving assembly includes mounting column, rotating rod and helical blade, the arc-shaped scraper is provided with three and fixedly installed in the outside of round plate, the arc-shaped scraper and filter screen are in contact with each other. Its realized the ability of scraping impurities, increased practicability, to solve the problem that water body filtration is carried out when pipeline anti-blocking, impurities can be attached to the surface of filter screen, affect the flow of water body.

The utility model discloses a float glass runner with a stirring structure, which comprises a mounting seat, the upper surface of the mounting seat is fixedly connected with a runner body, the upper surface of the runner body is fixedly connected with a transparent top cover, and the upper surface of the transparent top cover is fixedly connected with three protective covers. And the inner wall of each protective cover is fixedly connected with a driving motor. According to the device, through the touch panel, the driving motor can be started to drive the stirring rod to rotate, liquid glass is stirred through the stirring blades, the liquid glass is evenly mixed and kept in a stable flowing state, the situation that local concentration is not uniform is avoided, and therefore the quality of the glass is guaranteed, and the flow and temperature of the glass can be monitored in real time through the sensor in the flow channel; and the electric hydraulic telescopic rod is started as required to drive the flow speed adjusting plate to be matched with the connecting groove, so that the glass flow can be accurately controlled, the glass quality and the production efficiency are guaranteed, and problems can be found in time for adjustment.

The invention relates to the technical field of stirring equipment, and discloses an intelligent processing device for paper product production, which comprises a stirring barrel, a stirring power source, a stirring blade mechanism and an additive conveying mechanism, the stirring paddle mechanism is arranged in the stirring barrel, the stirring paddle mechanism comprises a stirring shaft body, a movable rod, a linear driving assembly and a plurality of paddle assemblies, and the top end of the stirring shaft body is fixed to the driving end of the stirring power source. According to the stirring paddle mechanism provided by the invention, the paddle has two use forms. In the initial stage of stirring, the paddle is in a flat first form, at the moment, the stirring amplitude of raw material slurry is small, a stable flowing state can be formed on the surface of the slurry, and air entrainment is effectively reduced. Meanwhile, the additive conveying mechanism slowly adds the additive into the bottom of the stirring barrel, the additive gradually flows upwards from the bottom of the barrel and is preliminarily mixed with the raw material slurry, and the air entrainment amount is further reduced.

The invention belongs to the technical field of pressure exchange, and discloses a fluid pressure energy recovery device and a fluid switcher thereof, and the fluid switcher comprises a first low-pressure barrel, a first connecting barrel, a high-pressure barrel, a second connecting barrel and a second low-pressure barrel; a piston assembly is arranged in a through cavity formed by the components and comprises a driving rod, a first piston, a piston rod and a second piston. The fluid switcher is connected with the first spiral pressure exchange cavity and the second spiral pressure exchange cavity through the piston traps, the first spiral pressure exchange cavity and the second spiral pressure exchange cavity are connected with the check valve set through the piston traps respectively, spherical isolation pistons are arranged in the first spiral pressure exchange cavity and the second spiral pressure exchange cavity respectively, and the spherical isolation pistons can be trapped by the piston traps. The fluid pressure energy recovery device has the advantages of being long in service life, small in occupied area, low in energy consumption and low in liquid mixing rate. The fluid switcher has the advantages of being high in structural component integration degree, low in switcher body energy loss, convenient to assemble and maintain and the like.

The invention belongs to the technical field of chemical engineering, and particularly discloses a process and a device for preparing chemical nickel through ultralow-temperature high-vacuum continuous rectification and absorption separation. The device for preparing the chemical nickel through ultralow-temperature high-vacuum continuous rectification and absorption separation comprises a raw material processing assembly, a rectification assembly and a pipeline assembly, the raw material processing assembly comprises a mixing tank and a filter, and the filter is arranged below the mixing tank and connected with the mixing tank; the rectification assembly comprises a first rectification tower, a first condenser, a first return tank, a second rectification tower, a second condenser and a second return tank. Through the integrated design of raw material treatment and double-tower rectification, the preparation process of chemical nickel is simplified, steam and produced liquid can be recycled and separated and purified for multiple times in the rectification process, energy consumption is reduced, and the production efficiency and the product purity are integrally improved.

The invention discloses composite multi-layer stable plate extrusion equipment and an extrusion method thereof, and relates to the field of composite plate production and processing.The composite multi-layer stable plate extrusion equipment comprises a first extruder and a second extruder, the first extruder and the second extruder extrude two melts used for producing a composite multi-layer stable plate respectively, and a plate discharging machine is used for flattening the melts and forming a preliminary plate blank; one end of the extrusion die is connected with the first extruder, the other end of the extrusion die is connected with the plate discharging machine, one side of the extrusion die is connected with the second extruder through a movable connector in a bent state, and the extrusion die is used for compounding the two melts according to a set proportion and then guiding the two melts to the plate discharging machine. The extrusion die formed by combining multiple layers of structures is designed, a five-layer composite board structure which sequentially comprises the middle layer, the two interlayers and the two outermost layers from inside to outside is formed, and the nail-holding power of the board is improved; the two interlayers and the two outermost layers are uniformly stressed in the flowing process, so that the material fusion quality is effectively improved.

This application provides a high-efficiency sealing pipe connection structure, comprising a connection mechanism and a pipe assembly. The inner wall of the connection mechanism has a stepped flow guiding cavity, which includes a contraction section and an expansion section. The inner wall of the contraction section has a turbulence-inducing protrusion. It also includes a convex-shaped turbulent elastic sealing mechanism, whose inner wide sealing end face conforms to the outer wall of the pipe and is machined with spiral microgrooves. The inner wall of the connection mechanism has a flow guiding groove, one end of which connects to the expansion section, and the other end extends to the starting end of the spiral microgrooves. This relates to the field of fluid transport technology. The fluid is pressurized by the contraction section, and the turbulence-inducing protrusions create a rotating turbulent flow. Part of the turbulence is guided to the sealing mechanism through the flow guiding groove, using fluid pressure to enhance the sealing fit. Simultaneously, the fluid generates circumferential scouring along the spiral microgrooves, achieving self-cleaning of the sealing surface. This invention has a compact structure, reliable sealing, and self-cleaning capability, and is suitable for rapid pipe connections in high-pressure, impurity-containing fluid environments.

The present invention provides a lean premixed annular multi-nozzle burner and gas turbine with strong and weak swirl matching, comprising: an axial swirl nozzle, a fuel premixer and a premixing sleeve; the fuel premixer is installed on the inner side of the premixing sleeve, the premixing sleeve and one end of the fuel premixer are installed on the end plate of the combustion chamber head, and the axial swirl nozzle is installed between the fuel premixer and the premixing sleeve; a plurality of the axial swirl nozzles are installed on the end plate of the combustion chamber head, the swirl numbers of adjacent axial swirl nozzles are different, and the swirl numbers of the alternate axial swirl nozzles are the same. The present invention adopts the arrangement of strong swirl nozzles and weak swirl nozzles alternately, so that the interference between the nozzles is more balanced, the flow and combustion state are stable, so that the influence on the entire multi-nozzle burner when some nozzles are disturbed can be effectively solved, and the stability of the multi-nozzle burner is enhanced.