30results about How to "Increase flow strength" patented technology

The invention discloses a hybrid unit of an SCR (selective catalytic reduction) system for vehicle urea, comprising a pipe body, a hybrid unit rib device and a nozzle, wherein the nozzle is aslant arranged on the wall surface of the pipe body; the hybrid unit rib device tightly abuts against the nozzle and is installed on the front end of the nozzle; the hybrid unit rib device comprises four ribs, the middle of the first rib and the second rib forms a fluid path similar to an atomizing pattern; the first rib and the second rib have certain gradient and twists towards the central area; the third rib has a baffle-shaped structure and is arranged near the pipe wall, the installation direction is vertical to the atomizing axis, and the third rib twists towards the wall surface; and the fourth rib is arranged along the atomizing axis direction and is composed of a group of blades alternately twisted left and right. The invention can bring the effect that a urea aqueous solution injected by the nozzle and tail gas are fully mixed before entering an SCR catalytic converter, thus reducing urea crystallization formed on the wall surface; and meanwhile, the hybrid unit has compact structure and is easy to process and install, and the effect of the hybrid unit is verified.

The invention relates to a fuel cell metal bipolar plate and a manufacturing method thereof, and belongs to the technical field of proton exchange membrane fuel cells. In the structure of the bipolarplate provided by the invention, the circular holes are distributed in the ridge of the cathode flow field, so the transmission of reaction gas and generated water under the ridge is facilitated, thedissipation of reaction heat at the ridge is also facilitated, the current density and the distribution uniformity thereof are improved, and meanwhile, the performance and the service life of a fuel cell are improved; inclined grids are evenly distributed on the two sides of the cathode flow field groove, so part of unreacted gas passing through the flow field ridge is forced to flow into the cathode flow field groove, the part of gas flowing into the cathode flow field groove plays a role in gas blocking, namely a backpressure role, on reaction gas originally flowing through the cathode flowfield groove, and the current density of the fuel cell can be improved.

The invention relates to a pot-type calcinator multi-level series fin type cooling device for coke after high-temperature calcination. The device comprises water inlet pipes, water outlet pipes and a plurality of annular cooling water sleeves and is characterized in that the plurality of cooling water sleeves are overlapped and fixedly connected, the outer wall of the inner side of each of the cooling water sleeves is provided with a plurality of fins, the fins on the cooling water sleeves are arranged into lines correspondingly, each line of the fins is located in the same vertical surface, the water inlet pipe and the water outlet pipe are correspondingly arranged at two ends of each of the cooling water sleeves, and except the water outlet pipe at the top cooling water sleeve and the water inlet pipe at the bottom cooling water sleeve, water inlet pipes and water outlet pipes of adjacent cooling water sleeves, which are located at the same end, are communicated through connecting pipes. The device has the advantages that the heat exchange area is large, coke cooling speed after the high-temperature calcination is fast, the discharge temperature is low, the working is reliable, and the like.

The invention discloses a heat exchanger of an oil heater. The heat exchanger comprises two oil pipes and multiple heat dissipation plates, wherein the two oil pipes are distributed vertically at an interval; and two ends of each heat dissipation plate are disposed on the two oil pipes respectively, an oil way channel communicating with the two oil pipes is disposed inside each heat dissipation plate, eat least one side edge of each heat dissipation plate is bent towards the other heat dissipation plate so as to form a bent part, bent parts with the same bending direction are disposed on the same side edge of at least two heat dissipation plates, and at least a part of one of the adjacent bent parts on the same side is located on the outer side of the other bent part so as to form an air flow channel. The heat exchanger of the oil heater disclosed by the invention has the advantages that flowing strength of air on the outer surface of the heat dissipation plates can be increased; the temperature on edges of the heat dissipation plates can be reduced; the heat dissipation capacity of the heat dissipation plates can be enhanced; and a user is prevented from being scalded during use of the heat exchanger of the oil heater.

The invention relates to an electromagnetic stirring generating device, method and application of a composite time-varying magnetic field. The device is a composite rotating magnetic field electromagnetic stirring generating device or a time-varying magnetic field generating device, or a traveling wave magnetic field electromagnetic stirring generating device. According to the method and the application, in the continuous casting, semi-continuous casting or die casting process, the electromagnetic stirring generating device of the composite time-varying magnetic field acts on a crystallizer for continuous casting or semi-continuous casting, a secondary cooling zone and any one position or multiple positions of the tail end or a riser in the mold casting production, liquid level and the like, so that the mechanical property of a casting blank is improved by improving the component segregation and the shrinkage porosity of the casting blank. Compared with the continuous casting or semi-continuous casting or die-casting production process, electromagnetic stirring or time-varying magnetic fields are independently applied, so that the shrinkage porosity and component segregation of the core of the casting blank are remarkably improved.

The invention discloses a pulse electric field-traveling wave magnetic field composite method for reducing the cracks of a cladding layer. The devices used in the method comprise a laser cladding numerical control device, a traveling wave magnetic field device and a positive and negative pulsed electric field device. During the cladding process, a traveling wave magnetic field is applied to a molten pool, so that the charged quantity of the non-magnetic particles and the charged particles in the molten pool is increased under the action of impressed current, the liquid metal particles are remarkably enhanced in Lorentz force in an external follow-up traveling wave magnetic field, the stirring effect on a molten pool is enhanced, the effects of fluid scouring, crushing and the like on dendrites are increased, the grain size is reduced, the fine grain strengthening effect is obvious, the defects, such as air holes, inclusions, component segregation, etc., are reduced, and the crack generation probability of a cladding layer is reduced. The composite device effectively solves the problems that the non-magnetic and charged particles are subjected to small Lorentz force in an electromagnetic field, and the electromagnetic stirring effect of the magnetic field on the molten pool is small.

The invention discloses a shell-and-tube point discharge solid-liquid phase change enhanced heat transfer device based on electrofluid mechanics and belongs to the technical field of solid-liquid phase change enhancement. The problem that the speed of the phase change process cannot be adjusted through an existing passive enhancing technology is solved. The shell-and-tube point discharge solid-liquid phase change enhanced heat transfer device comprises a metal outer pipe and a plurality of composite inner pipes arranged in the metal outer pipe; phase change materials are filled between the metal outer pipe and the composite inner pipes; the metal outer pipe is grounded; and a heat insulation layer is arranged on the outer wall of the metal outer pipe; each composite inner pipe comprises ametal inner pipe, a plurality of groups of fins arranged outside the metal inner pipe and an insulating layer arranged on the inner wall of the metal inner pipe; direct-current positive voltage is connected into the metal inner pipes; and a heat source circulates in the metal inner pipes. Compared with the existing passive enhancing technology, due to the fact that the electric heating convectionintensity in a flow field is directly affected by the potential difference between polar plates, the speed of the phase change process can be actively controlled by adjusting the input voltage of an anode plate. After an electric field is applied, the flow intensity can be remarkably enhanced, and a good phase change enhancing effect is obtained.

The invention discloses an oil-filled heater. The oil-filled heater comprises two oil tubes and a plurality of cooling fins, wherein the two oil tubes are distributed vertically in a spaced mode; and the two ends of each cooling fin are arranged on the two oil tubes correspondingly, an oil channel communicating with the two oil tubes is formed in each cooling fin, and air chambers, a distance away from the corresponding oil channel, are formed in one or more side edges of each cooling fin; a top air outlet is formed in each air chamber, and air inlets are formed in all opposite side walls of the air chambers; and a guide plate used for guiding air into the corresponding air chamber is arranged in each air inlet. By adoption of the oil-filled heater, the cooling areas of the edges of the cooling fins can be enlarged, the flow intensity of air on the inner surfaces and the outer surfaces of the cooling fins is enhanced, the temperatures of the edges of the cooling fins are increased, the cooling capacity of the cooling fins is improved, and the danger that a user is scalded in the use process of the oil-filled heater is avoided.

The invention discloses an assembly dust blowing device for an aluminum alloy door and window. The assembly dust blowing device comprises a dust removal box, the outer wall of one side of the dust removal box is fixedly connected with a gear box through bolts, the outer wall of one side, away from the dust removal box, of the gear box is fixedly connected with a motor through bolts, one end of themotor is rotationally connected with a driving gear through a rotating shaft, and a driven gear is arranged in the gear box, and the driven gear is in meshed connection with the driving gear throughgear teeth, and a lead screw is welded on the outer wall of one side of the driven gear. The contact area between the aluminum alloy door and window and the air flow can be effectively improved through the reciprocating air flow, and the air flow intensity is improved, the dust and the bristles on the aluminum alloy door and window can be conveniently blown up more effectively, and the cleaning efficiency is improved; and on the other hand, full contact between the aluminum alloy door and window and the air flow can be guaranteed, all-directional cleaning can be guaranteed, and the problem that aluminum alloy door and window are not clean is avoided.

The invention discloses a direct-current electric field-traveling wave magnetic field composite method for improving the quality of a cladding layer. The devices adopted by the method mainly comprisea laser cladding numerical control device, a traveling wave magnetic field device and a direct-current electric field device. According to the composite device, firstly, the direct-current power supply device is started before cladding until the cladding is completed, and secondly, a traveling wave magnetic field is applied to a molten pool during the cladding process, so that the charged quantityof non-magnetic particles and particles with less charges in the molten pool is increased under the action of impressed current. Furthermore, in an external follow-up traveling wave magnetic field, the Lorentz force borne by the liquid metal particles is remarkably enhanced, the stirring effect on a molten pool is enhanced, the effects of fluid scouring, crushing and the like on the dendrites areincreased, the grain size is reduced, the fine grain strengthening effect is obvious, the structure defects of a cladding layer are reduced, and the quality is improved. The composite device effectively solves the problems that the non-magnetic and charged particles are subjected to small Lorentz force in an electromagnetic field, and the electromagnetic stirring effect of the magnetic field on the molten pool is small.

The invention discloses a graphite electrode heating device which comprises a box body and a motor arranged on one side of the box body. A groove is formed in one side of the box body, and a rotatinghole is formed in the inner wall of the side, close to the motor, of the groove. A rotating shaft is welded on an output shaft of the motor, one end of the rotating shaft penetrates through the rotating hole and extends into the groove, and a sleeve is welded on the end of the rotating shaft. A first belt pulley is fixedly sleeved on the outer side of the rotating shaft. Stand columns are welded on the inner wall of the top side and the inner wall of the bottom side of the groove, and circular columns are horizontally and rotationally arranged on the ends, close to each other, of the two standcolumns. Second belt pulleys are fixedly sleeved on the outer sides of the circular columns, and a same belt is arranged on the two second belt pulleys and the first belt pulley in a transmitting mode. The graphite electrode heating device has the advantages of reasonable design and high practicability and is convenient to drive a sleeve to rotate. Moreover, the flow intensity of air in the groove can be increased through a fan blade, so that a graphite electrode in an electrode placing slot can be fully in contact with the air in the groove, and the temperature rising rate of the graphite electrode is increased.

The invention relates to a multi-stage parallel cooling device for high-temperature calcined coke of a pot-type calcining furnace. The multi-stage parallel cooling device comprises a water inlet system and annular water cooling sleeves, and is characterized in that a plurality of the water cooling sleeves are superposed and fixedly connected; the water inlet system comprises a water inlet header tube which is communicated with a water supply system and a plurality of water inlet branch tubes; a regulating valve is arranged on each water inlet branch tube; a water outlet tube is arranged on one end of each water cooling sleeve, and the other end of the water cooling sleeve is communicated with a water inlet branch tube; and the water outlet tube and the water inlet branch tube are arranged on the two ends of the water cooling sleeve. According to the multi-stage parallel cooling device, the high-temperature calcined coke provided by the invention has the advantages of quick cooling speed, controllable cooling water amount, low discharging temperature, high working reliability and the like.

The invention discloses a surface treatment device for automobile brake pad manufacturing and a use method of the surface treatment device. The surface treatment device for automobile brake pad manufacturing comprises a machine box, a dust collecting device and a filter plate, a front door is installed on the front of the machine box, a perspective window is arranged in the middle of the front door, a controller is installed above the perspective window, and the controller is connected with the front door in a bolt mode. A button is installed on the front of the controller, an air passing channel is installed at the rear of the machine box, a slag discharging plate is installed at the bottom of the air passing channel, a power cord is arranged below the air passing channel, an exhaust cover is installed at the top of the machine box, and the exhaust cover is in a conical table shape. According to the surface treatment device for automobile brake pad manufacturing and the use method ofthe surface treatment device, machinery is used for fixing brake pads to avoid handheld operation, the safety of an operator is increased, ground dust and slag are wholly sealed by using the machine box and collected by vacuum suction, and the harm of the dust and slag to a human body is reduced; and the one-way flow of the dust and slag is prompted by using gas circulation, the flow force of pushing the dust and slag is increased, the smoothness of dust and slag flow is improved, and the cleaning quality is ensured.

The invention relates to an electromagnetic stirring generation device, method and application of a composite time-varying magnetic field. The device is a time-varying magnetic field generating device, a composite rotating magnetic field electromagnetic stirring generating device and / or a traveling wave magnetic field electromagnetic stirring generating device; the method and application are In the process of continuous casting, semi-continuous casting or mold casting, the electromagnetic stirring generating device with composite time-varying magnetic field acts on any one or more of the crystallizer, secondary cooling zone and end of continuous casting or semi-continuous casting, or Riser, liquid level and other positions in die casting production, so as to improve the mechanical properties of the billet by improving the composition segregation and shrinkage porosity of the billet. Compared with the single application of electromagnetic stirring or time-varying magnetic field in the production process of continuous casting, semi-continuous casting or mold casting, the present invention can significantly improve the shrinkage cavity porosity and component segregation in the core of the billet.

The invention discloses a CO2 rectification separation and purification device with high purification rate, wherein the device comprises a rectification tower; the top of the rectification tower is communicated with an upper gas outlet pipe; one end, far away from the rectification tower,of the upper gas outlet pipe is communicated with a condenser, a liquid outlet of the condenser is communicated with an upper return pipe, and the liquid outlet of the condenser is communicated with an upper discharge pipe; and the bottom of the rectification tower is communicated with a lower liquid outlet pipe, one end, far away from the rectification tower, of the lower liquid outlet pipe is communicated with a reboiler, and an air outlet of the reboiler is communicated with a lower return pipe. When an arranged rotating shaft rotates, a rotary frame can be driven to rotate, heavy liquid in the rectification tower from top to bottom falls into the rotary frame, light gas from bottom to top blows open a small gas cap through a small vent hole, then the light gas makes contact with a heavy liquid, light substances and heavy substances in the rectification tower are mutually exchanged; and in addition, the light gas and the heavy liquid can be in full contact with each other through the rotating rotary frame, and the rectification effect is improved.

The invention discloses a laundry sheet slurry main-auxiliary two-stage stirring mixing apparatus. According to the laundry sheet slurry main-auxiliary two-stage stirring mixing apparatus, various components of the effective components of a laundry sheet to be mixed are placed into a material box, a main stirring shaft belt wheel drives a stirring main shaft to rotate after the apparatus is started, the slurry forms anterior-posterior circulation through the main stirring shaft while a stirrer set drives the belt wheel to act, a four-blade rotation plate rotates, a suspending column material hopper is immersed into the slurry, the slurry is collected, the former suspending column material hopper leaves the liquid level of the material box and the next suspending column material hopper enters the slurry, a secondary stirring shaft motor drives a secondary stirring shaft to perform high speed rotation so as to stir the slurry of the suspending column material hopper, and the slurry overflows from the cavity on the other end of the suspending column material hopper and falls onto the other side of the main stirring shaft inside the material box. According to the present invention, with the laundry sheet slurry main-auxiliary two-stage stirring mixing apparatus, the problems of low efficiency, high labor intensity and low automation degree of the traditional laundry sheet slurry mixing equipment are solved while the automated production line is conveniently formed, and the advantages of simple operation and high stirring quality are provided.

The invention discloses a micro-reaction channel structure, a micro-reactor based on the micro-reaction channel structure and a nano-material synthesis system, and can overcome the defects that an existing micro-reactor is long in reaction distance, poor in operability and the like. The reaction mixing efficiency can be flexibly regulated and controlled; and based on the strong liquid mixing effect, a nano material synthesis system is constructed. According to the design working scheme, the micro-reaction channel structure comprises a micro-channel with the characteristic scale ranging from 0.005 mm to 2 mm, a certain number of spine structures are arranged on the inner wall or in the middle of the micro-channel, spines such as petals and roots in a flower gather together, and leaf tips are unfolded in the circumferential direction. The spines with the roots gathered together form a microstructure. According to the nano-material synthesis system constructed based on the micro-reaction channel, multiple chemical reagents needed for synthesizing the nano-material are completely mixed through the micro-reaction channel for multiple times, the mixed liquid is led to a target site where the nano-material needs to be synthesized, and the nano-material is formed after post-treatment such as heating and drying.

The invention relates to the field of waste glass recycling equipment, in particular to fine waste glass powder slag recycling and smashing equipment which comprises a rack; a smashing cylinder used for smashing waste glass is fixed to the rack; crushing equipment is arranged in the smashing cylinder; a primary screening mechanism used for primarily screening the smashed waste glass is arranged on the side wall of the smashing cylinder; an air pipe II is fixed to the side wall of the lower end of the smashing cylinder; a second-stage screening mechanism and a third-stage screening mechanism which are used for secondary screening of the smashed glass screened by the primary screening mechanism are arranged in the air pipe II; the lower end of the smashing cylinder is fixed and communicated with a first discharging pipe corresponding to the primary screening mechanism; and a second discharging pipe and a third discharging pipe corresponding to the second-stage screening mechanism and the third-stage screening mechanism are fixed to and communicated with the air pipe II. According to the fine waste glass powder slag recycling and smashing equipment, smashing and screening of the glass powder slag are achieved, aqueous liquid is not needed, and the glass powder slag can be completely utilized.

The invention discloses a seam-like welding-traveling wave magnetic field composite method for improving the defects of a cladding layer. The adopted devices mainly comprise a laser cladding numericalcontrol device, a traveling wave magnetic field device and a seam-like welding device. According to the present invention, firstly, the seam-like welding device is started before cladding until the power is continuously supplied for a period of time after cladding is completed, and secondly, a traveling wave magnetic field is applied to a molten pool during the cladding process, so that the charged quantity of non-magnetic particles and particles with small charged quantity in the molten pool is increased under the action of impressed current, in an external follow-up traveling wave magneticfield, the Lorentz force borne by the liquid metal particles is remarkably enhanced, then the stirring effect of a molten pool is enhanced, the number of crystal grains is increased, the fine grain strengthening is remarkable, the cladding layer structure defects are reduced, and the quality is improved. According to the method, the problems that the non-magnetic particles with small electric charge amount are subjected to small Lorentz force in the electromagnetic field, and the electromagnetic stirring effect of a magnetic field on a molten pool is small are effectively solved, and meanwhilethe defects that in the prior art, the refining effect is not remarkable only by enhancing the magnetic induction intensity of the magnetic field, and the pre-heating before melting and slow coolingdevices after melting are needed to be additionally arranged, are overcome.

The invention provides an arc-top piston top, an arc-top piston and a combustion chamber. The arc-top piston top comprises an arc-shaped pit area and two conical surface protruding area; the arc-shaped pit area is a bowl-shaped pit and is located in the center of the arc-top piston top; the height of the first end of each conical surface protruding area is larger than that of the second end of each conical surface protruding area, the first ends of the conical surface protruding areas make contact with the outer edge of the arc-shaped pit area, and the second ends of the conical surface protruding areas extend to the edge of the arc-top piston top; the two conical surface protruding areas are located on the front side and the rear side of the arc-shaped pit area respectively, and the two conical surface protruding areas are symmetrically arranged relative to the arc-shaped pit area. The arc-top piston top can be applied to a large-cylinder-diameter and high-compression-ratio engine, the airflow movement speed in the air inlet stroke of the engine can be increased to a large extent, the compression stroke and the turbulence energy at the tail end are improved, and the knocking phenomenon of the large-cylinder-diameter and high-compression-ratio engine in the related technology is effectively avoided.

The invention discloses a strengthened micro cyclone separator and a high-pressure separation device with the separator. The strengthened micro cyclone separator comprises an outer pipe and an inner pipe. Part of the lower portion of the inner pipe enters the upper portion of the outer pipe. Guiding vanes are arranged between the inner pipe and the outer pipe. An opening between the outer pipe and the inner pipe is a cyclone separator inlet. The outer pipe and the inner pipe are connected through the guiding vanes. The 3-6 guiding vanes are in the spiral line type and are arranged in the circumferential direction of the outer wall of the inner pipe in the same direction and evenly distributed. According to the high-pressure separation device with the separator, a partition plate, the structure, the arrangement mode and the fixing method of the high-pressure cyclone separation device are designed at the same time. The efficient, energy-saving and long-period-running high-pressure separation device is established. Complete separation of gas, liquid and solid in gas, liquid and solid mixtures of the inlet is achieved, and the resistance loss is far smaller than the pressure loss of an existing conventional high-pressure separation device.

The invention discloses a heat exchanger of an oil heater. The heat exchanger comprises two oil pipes and multiple heat dissipation plates, wherein the two oil pipes are distributed vertically at an interval; and two ends of each heat dissipation plate are disposed on the two oil pipes respectively, an oil way channel communicating with the two oil pipes is disposed inside each heat dissipation plate, eat least one side edge of each heat dissipation plate is bent towards the other heat dissipation plate so as to form a bent part, bent parts with the same bending direction are disposed on the same side edge of at least two heat dissipation plates, and at least a part of one of the adjacent bent parts on the same side is located on the outer side of the other bent part so as to form an air flow channel. The heat exchanger of the oil heater disclosed by the invention has the advantages that flowing strength of air on the outer surface of the heat dissipation plates can be increased; the temperature on edges of the heat dissipation plates can be reduced; the heat dissipation capacity of the heat dissipation plates can be enhanced; and a user is prevented from being scalded during use of the heat exchanger of the oil heater.

The invention provides a wing-shaped structure, a heat exchange plate, a heat exchanger and a heat exchange method, and belongs to the technical field of heat exchangers. The wing-shaped structure comprises a shell, at least one flow channel is formed in the shell in the axial direction, each flow channel comprises a plurality of communicated containing cavities, each containing cavity is divided into a plurality of sub containing cavities with different inner diameters, and the sub containing cavities with the different inner diameters are communicated through miniature discrete channels. The heat exchange plate comprises a base plate and a plurality of wing-shaped structures, and the wing-shaped structures are fixedly arranged on the base plate. The heat exchanger comprises the heat exchange plate. The heat exchange method comprises the steps that working fluid enters the sub-containing cavities from the micro discrete channels of the wing-shaped structures; the working fluid in the sub-containing cavity enters the next sub-containing cavity through the micro discrete channel again, and circulation is carried out; and the working fluid leaves the wing-shaped structure after passing through the last sub-accommodating cavity on the flow path. The heat exchanger has the advantage of being high in heat transfer efficiency, and deposition of scale substances can be reduced.