26results about How to "Improve flow stability" patented technology

The utility model belongs to the technical field of ball valves, and particularly relates to a ball body of a ball valve, which comprises a ball body, a flow channel hole for fluid to pass through is arranged in the center of the ball body, one end of the flow channel hole is an inlet end, the other end of the flow channel hole is an outlet end, and a plurality of spiral rifling grooves are arranged on the inner wall of the flow channel hole in an annular array mode. A plurality of groups of defoaming channels are formed in the spiral rifling groove, one end, close to the direction of the inlet end, of each defoaming channel is an inlet, the other end of each defoaming channel is an outlet, the hole diameter of each outlet is smaller than that of each inlet, and the hole diameters of the inlets and the outlets in the groups of defoaming channels from the inlet end to the outlet end tend to be gradually reduced. The shape and the layout of the spiral rifling groove can improve the flowing stability of the fluid, and the defoaming channel shrinks and crushes large bubbles in the fluid step by step to enable the large bubbles to be dissolved in the liquid, so that the detection precision of the metering equipment on the fluid flow is improved, and the quality of subsequent chemical preparations or liquid blending is guaranteed.

The invention relates to the technical field of zinc powder manufacturing equipment, and particularly discloses a continuous production inert zinc powder atomization preparation device which comprises an atomization furnace, the bottom of the atomization furnace fixedly communicates with communicating pipes, and the two communicating pipes are connected with a large grading system and a small grading system correspondingly. Wherein one ends, far away from the atomizing furnace, of the large grading system and the small grading system are fixedly communicated with a balance tank. Molten zinc can be preliminarily refined when passing through the flow guide holes under the action of pressure intensity, finally enters the polymerization groove in the polymerization base and is differentiated again through the flow diffusion holes communicated with the polymerization groove, the molten zinc can be differentiated into trickles in a multi-stage mode through the multi-stage differentiation mechanism, the trickles can be more evenly distributed in the atomization chamber, and therefore the atomization effect is improved. By means of the technical scheme, the contact area between atomized gas and the liquid zinc is larger and more uniform, the situation that local liquid zinc is too much or too little is avoided, it is ensured that each part of liquid zinc can be fully and stably atomized, zinc powder with more uniform particle size is produced, and the product quality is improved.

The invention discloses an evaporative crystallization device based on high-concentration wastewater and a zero discharge process, and relates to the technical field of wastewater treatment.The evaporative crystallization device based on the high-concentration wastewater comprises an evaporation tank, and a drainage device is arranged in the evaporation tank; the flow guide device comprises a heat conduction inner barrel fixed in the evaporation tank, an inner ring channel formed in the center of the heat conduction inner barrel, a flow guide pipe fixed in the inner ring channel and a plurality of groups of outer ring channels formed in the heat conduction inner barrel, and the plurality of groups of outer ring channels are sequentially formed from inside to outside by taking the inner ring channel as the center; first water outlets which are arranged up and down are formed between the inner ring channel and the adjacent outer ring channel, and second water outlets are formed between the other outer ring channels. By arranging the drainage device, when entering the evaporation tank, wastewater can sequentially pass through the multiple groups of outer ring channels along the inner ring channel in an S-shaped trend so as to diffuse and flow towards the periphery, so that disorder and stagnation of flow in a traditional system are avoided, and continuous flowability of the wastewater is ensured.

The application relates to the field of piezoelectric pumps, in particular to a micro-nano piezoelectric air pump with air inlet and outlet on the same surface, which comprises a rack mechanism, an oil tank, an engine, a battery assembly and a silencer which are sequentially installed on a rack body, a moving piece located outside the rack body, a shell piece arranged outside the oil tank, a control piece arranged on the top of the shell piece and a tool box installed on one side of the shell piece. The piezoelectric ceramic prepared by adopting the micro-nano process is combined with the laser welding assembly mode instead of the adhesive assembly mode, so that the reliability risk of the aging of the adhesive layer and the decrease of the bonding force in the high-temperature, high-humidity and low-temperature environment is avoided, the air tightness and long-term consistency between the layers are ensured, and the durability of the product under the harsh working conditions such as vibration and mechanical impact is remarkably improved. Thirdly, the air inlet, the air outlet and the air exhaust are completed on the same structure surface, the flow path layout and the number of parts are simplified, and the assembly complexity and the cost are reduced.

The invention discloses a stable glue supply system and method for a dispensing valve. The system comprises a first PLC, a second PLC, a first PLC input, a second PLC input, a glue barrel, a glue supply pump, a galvanometer, an overflow valve, a belt feedback pressure gauge, a fixed differential pressure reducing valve, an adjustable throttling valve, the dispensing valve, a dispensing valve glue outlet, a two-position four-way electromagnetic valve, a glue valve fluid cavity, a piston, a valve rod and a valve nozzle. The output pressure of the glue supply pump is represented as PO, the set pressure of the overflow valve is represented as P00, the pressure detected by the belt feedback pressure gauge and the input pressure of the fixed differential pressure reducing valve are represented as P1, the pressure of the fixed differential pressure reducing valve after the P1 is reduced is represented as Pm, and the pressure of the rear end of the adjustable throttle valve is represented as Pn, the stable glue supply system and method for the glue dispensing valve are suitable for the glue dispensing industry, and the pain point of unstable glue supply flow in the glue dispensing industry is solved; the dispensing flow stability is good, the structure is simple, PLC logic is simple, and debugging is easy.

The utility model provides a proton exchange membrane fuel cell bipolar plate variable period variable cross-section runner and bipolar plate, including bipolar plate, the runner of bipolar plate includes ridge and groove that are arranged at interval, the ridge at the both sides of same groove is symmetrically arranged along the central line of groove, the both side walls of groove are variable period wave shape, and the ridge is in the variable period wave shape. A bipolar plate runner periodically shrinks and expands in the reaction gas flowing direction, the center line of a groove serves as the x axis, the transverse fluctuation amplitude y of the side wall of the single side of the groove meets the function y = A * sin (Bx + C) + D, A, C and D are all constants, the period # imgabs0 # meets the curvilinear function # imgabs1 # k based on the Sigmoid function, m, n and q are all constants, and the symmetrical opposite side walls meet the function y '=-y. By adopting the variable-period variable-cross-section flow channel, the shrinkage cycle period of the outlet side flow channel is prevented from being too small, the reaction gas flow stability of the inlet section and the outlet section is improved, the flow speed and the pressure can be adjusted in the flow channel, the under-ridge mass transfer capacity is enhanced, the better liquid water discharge effect is achieved, and water logging is prevented.

The utility model discloses a fuel gas inlet structure, a throttle valve and a multi-fuel engine, the fuel gas inlet structure is arranged on the throttle valve, the throttle valve comprises a throttle valve main body, the throttle valve main body is provided with a through air inlet channel, and the fuel gas inlet structure comprises a fuel gas inlet channel arranged in the throttle valve main body; a gas inlet end opening of the gas inlet channel is used for being connected with a gas conveying pipeline, a gas outlet end opening of the gas inlet channel communicates with the air inlet channel, a gas outlet guide pipe is arranged at the gas outlet end opening of the gas inlet channel, and the gas outlet guide pipe is obliquely arranged in the gas outlet direction of the air inlet channel. At least one part of the air outlet guide pipe extends into the air inlet channel, the end face of the air outlet end of the air outlet guide pipe is a smooth face, and the side, facing the air inflow side in the air inlet channel, of the end face of the air outlet end of the air outlet guide pipe is higher than the side, back to the air inflow side in the air inlet channel, of the end face of the air outlet end of the air outlet guide pipe. The gas outlet speed and the gas outlet stability of fuel gas can be effectively improved.

The utility model discloses a layered partition cylinder for a heat exchanger tube box, which comprises a tube bundle plate detachably arranged at one end of a heat exchanger and a tube box detachably arranged at one end of the tube bundle plate away from the heat exchanger and provided with an inner cavity, an air inlet tube is inserted into the tube box, an exhaust tube is arranged on the peripheral side of the tube box, and the inner cavity of the tube box is communicated with the tube bundle plate. An air inlet cylinder is arranged in the inner cavity, one end of the air inlet cylinder is connected with the air inlet pipe, the other end of the air inlet cylinder is connected with the tube bundle plate, the air inlet cylinder is communicated with the air inlet pipe, a flow guide cover is arranged on the peripheral side of the air inlet cylinder, and the flow guide cover, the air inlet cylinder and the inner cavity form an air backflow cavity. And the gas backflow cavity is communicated with the exhaust pipe. The layered partition cylinder has no flow direction dead angle, the gas flow direction is stable, and the heat exchange effect is good.

The utility model provides an air supply assembly and a refrigerator, and belongs to the technical field of electrical equipment. The air supply assembly comprises an air supply front cover, an air supply rear cover and a connecting piece. A first through hole is formed in the air supply front cover; a second through hole is formed in the air supply rear cover; the connecting piece comprises a first reinforcing block and a screw, the first reinforcing block is located on the side, away from the air supply rear cover, of the air supply front cover, a first threaded hole is formed in the first reinforcing block, and the screw penetrates through the second through hole and the first through hole and is in threaded connection with the first threaded hole. By the adoption of the air supply assembly, the air supply front cover and the air supply rear cover are clamped through other parts in the refrigerator so as to be assembled, the air supply front cover and the air supply rear cover are connected and fixed through the first reinforcing blocks and the screws, and the assembling stability and tightness between the air supply front cover and the air supply rear cover in the air supply assembly are improved; therefore, the flowing stability of cold air is improved, and the refrigerating effect of the refrigerator is improved.

The double-sided high-speed weft knitting circular knitting machine comprises a machine body, a spraying mechanism and an air blowing mechanism arranged in the machine body, a supporting plate is arranged on the outer side wall of the machine body and surrounds the peripheral face of the machine body, and an annular baffle is arranged on the supporting plate and surrounds the outer side of the air blowing mechanism; the spraying mechanism is used for spraying water to the inner wall of the annular baffle to form a water curtain, and the air blowing mechanism is used for blowing yarn flying wadding to the inner wall of the annular baffle; a water storage tank is arranged at the bottom of the supporting plate, a plurality of drainage holes are formed in the supporting plate in a penetrating mode, and the drainage holes are close to the inner side of the annular baffle and used for discharging water flowing down from the inner side of the annular baffle out of the annular baffle. The air blowing mechanism blows yarn flying catkins drifting away in the machine body to the annular water curtain, finally accumulated water at the bottom of the annular baffle is discharged out of the annular baffle through the drainage hole of the supporting plate, and the impurity collecting efficiency is improved.

The utility model discloses a nitric oxide generator for treatment and a nitric oxide therapeutic apparatus thereof, the nitric oxide generator comprises a shell, the shell is internally provided with a cavity, the shell is provided with an air inlet and an air outlet which are communicated with the cavity, and the air inlet and the air outlet are communicated with the cavity. The nitric oxide generator comprises two spark plugs which penetrate through the shell, central electrodes of the two spark plugs are arranged in the cavity, the central electrodes of the two spark plugs are opposite and arranged in a spaced mode, and the central electrode of one spark plug is connected with external high-voltage positive electricity to form a positive electrode and the central electrode of the other spark plug is connected with external high-voltage positive electricity to form a negative electrode. And the central electrode of the other spark plug is connected with external high-voltage negative electricity to form a negative electrode. According to the utility model, the disturbance to flowing airflow can be greatly reduced, the flow stability of nitric oxide (NO) gas is improved, and finally, the concentration of the nitric oxide (NO) gas inhaled by a patient can be improved, so that the treatment effect is improved.

The utility model discloses an elastic glue filling device. The filling device comprises a storage piece, a conveying piece, a conveying channel, a pressure adjusting piece and an air pressure control assembly, the storage part is used for storing elastic glue with compressibility; the conveying part is arranged at the bottom of the material storage part, communicates with the material storage part and is used for pressurizing and outputting the elastic rubber; one end of the conveying channel is connected with the output side of the conveying part, and the other end of the conveying channel is at least partially arranged above the storage part and used for enabling the elastic glue to flow back to the storage part; a filling part is arranged in the middle of the conveying channel and is used for filling and outputting the elastic glue; the pressure adjusting part is arranged at the end, away from the conveying part, of the conveying channel. The air pressure control assembly is connected with the pressure adjusting piece and used for providing constant air pressure for the pressure adjusting piece. Through the arrangement, the perfusion stability and precision of the perfusion device are higher.

The application belongs to the technical field of ice particle jet, and particularly relates to a device and a jet method for preparing straight-rotation mixed ice particle jet by using high-pressure superheated liquid flash evaporation, which comprises a high-pressure superheated liquid supply system and a water supply system, the high-pressure superheated liquid supply system and the water supply system are respectively connected with a straight-rotation mixed ice particle generation jet, the straight-rotation mixed ice particle generation jet system is connected with a recovery system, the recovery system is connected with the high-pressure superheated liquid supply system through a pipeline, the straight-rotation mixed ice particle generation jet system comprises a double-layer sleeve, the inner layer of the double-layer sleeve is connected with the water supply system, the outer layer is connected with the high-pressure superheated liquid supply system, an impeller is arranged at the outlet of the double-layer sleeve, a convergent atomizing nozzle is arranged at the outlet of the impeller, a protective shell is arranged outside the convergent atomizing nozzle, the convergent atomizing nozzle and the impeller center line are coincided with the inner layer, and the superheated liquid flash evaporation in the application has high refrigeration power and high speed, and can complete ice particle preparation in a short time.

The invention belongs to the technical field of monofilament spinning, and particularly relates to a monofilament and a preparation method thereof. The monofilament is prepared from the following raw materials in percentage by weight: 93.00 wt% to 98.90 wt% of polyphenyl ether sulfur resin, 0.50 wt% to 5.00 wt% of polyester, 0.30 wt% to 1.00 wt% of a nucleating agent and 0.30 wt% to 1.00 wt% of a crystallization accelerant. According to the monofilament provided by the invention, the polyphenylene ether sulfur resin is adopted as a main raw material, the nucleating agent and the crystallization accelerant are added for blending granulation to form a PPS modified polymer, micro-crosslinking is formed through a double-screw hot shearing effect, the melt strength is improved, and the flow stability is improved for single-screw spinning in the next step; meanwhile, the polyester blend is added, so that the fluidity during spinning is remarkably improved, the stability and efficiency of the production process are improved, the adhesion between PPS and a mold is reduced, and the abrasion of equipment is reduced.

The present invention discloses a micro-motion pantograph bow head, and relates to the technical field of electric vehicle pantographs. The present invention comprises a bow head bracket, a carbon slide assembly and a ram horn, wherein the bow head bracket comprises a skylight pipe and a balance seat installed at both ends of the skylight pipe, the ram horn is installed on the balance seat, and both ends of the carbon slide assembly are respectively installed on the balance seats at both ends of the skylight pipe through airbag springs, and a guide device is arranged between the carbon slide assembly and the balance seat, and the guide device limits the reciprocating motion of the carbon slide assembly along the axis direction of the airbag spring, and the guide device limits the expansion and contraction amplitude of the airbag spring. The present invention drives the carbon slide assembly to rise and fall slowly in a small range under the cooperation of the airbag spring and the guide device, absorbs the impact force of the contact network, reduces the recoil force of the carbon slide on the contact network, slows down the wear rate, and improves the tracking property and current receiving stability of the carbon slide.

This utility model discloses an injection mold with a hot runner flow guiding and interconnecting structure, including an upper mold with an internal mounting groove containing a hot runner mechanism. The hot runner mechanism includes an upper runner plate and a lower runner plate, each containing a main runner and multiple branch runners. The main runner and branch runners have semi-circular cross-sections, and the upper and lower runner plates combine to form a complete circle. Each of the branch runners contains a flow guiding and interconnecting component, which includes a guide tube and a flow regulating component. This utility model relates to the field of injection mold technology. This injection mold with a hot runner flow guiding and interconnecting structure makes the flow of molten plastic more uniform in the branch runners and main runner through the hot runner mechanism, thereby avoiding molding defects caused by uneven flow. Furthermore, the flow regulating component further optimizes the flow stability of the molten plastic.

The invention discloses a jet flow control device for aircraft model flight test and a test method thereof, and belongs to the field of aircraft test. The control device includes a driving motor, a motor mounting seat, a coupling, a valve adapter shaft, a valve mounting seat, a valve body and a valve core, and the valve core is a V-mouth ball core whose inlet area does not change with the rotation of the ball core. Based on this device, a use strategy of jet control and traditional control rudder combination is developed. Compared with the traditional proportional flow control device, while ensuring the high-frequency and large-flow proportional control requirements, the energy loss is lower, the proportional control response speed is higher, and the pipeline flow stability is better. The strict requirements of load weight volume and jet control accuracy during aircraft model flight test can be met, and the control efficiency of jet control measures can be verified by aircraft model flight test.

The invention relates to the field of valves, in particular to a valve capable of improving flow stability and a mass flow controller applying the valve. The valve comprises a flow inlet block, a lower sealing piece, an upper sealing piece, a horizontal guide elastic piece and a control rod. The flow inlet block is provided with a flow inlet and a containing cavity. The lower sealing piece is located in the containing cavity and provided with a plurality of inflow channels, the lower sealing piece is further provided with a matched inclined face, and the matched inclined face inclines outwards from bottom to top; the upper sealing piece is fixedly connected with the inflow block and provided with a plurality of outflow channels, the outflow channels and the inflow channels are staggered, the horizontal guide elastic piece comprises a circular ring part and at least three protruding parts, the circular ring part is arranged outside the lower sealing piece in a sleeving mode at intervals, and all the protruding parts are evenly distributed in the circumferential direction of the circular ring part and protrude out of the circular ring part inwards in the radial direction. And all the convex parts are in contact with the matching inclined surface so as to apply pre-tightening force to the lower sealing piece. It can be guaranteed that the lower sealing piece and the upper sealing piece are kept horizontal in the opening process and after the valve is opened, and therefore stable flow is guaranteed.

The invention discloses an anti-material-interruption control method and system, and relates to the technical field of anti-material-interruption control, and the method comprises the steps: calculating the pressure impulse of an angular travel window; calculating the mass estimation value of the mixed gas in the angular travel of the single chamber based on the pressure asymmetric difference value; performing one-time degassing operation on the upstream bypass degassing valve based on the mixed gas mass estimation value; and after the one-time degassing operation is finished, removing residual wet films and condensed micro-drops in an annular gap area between the edge and the conical wall of the washing umbrella-shaped insertion piece. According to the invention, closed-loop determination of the continuous feeding process is realized.

The present invention discloses a hydraulic model and design method of a pump-jet propulsor with a movable flexible guide vane, which relates to the technical field of underwater vehicle propulsors, including flexible guide vanes, rotors, stators, stator hubs and rotating shafts; the stator hub is a hollow structure, a support bearing is arranged in the stator hub, and the support bearing is used to support and position the rotating shaft; a stator and a flexible guide vane are arranged on the outer wall of the stator hub; a rotor is arranged on the rotating shaft, and the rotor is arranged between the stator and the flexible guide vane; the stator, the rotor and the flexible guide vane are all arranged in a conduit, wherein the stator is fixedly connected to the conduit; the conduit is a conical structure, the flexible guide vane is arranged at the large end position of the conical structure, and the stator is arranged at the small end position of the conical structure. The present invention can better adapt to complex sea conditions such as non-uniform wake and oblique flow by adding flexible guide vanes, and improve its stability and hydrodynamic performance under complex sea conditions.

The application provides a fluorine-free polymer processing aid and application thereof, the fluorine-free polymer processing aid comprises a polyurethane-based polymer and a synergist; the synergist comprises any one or a combination of at least two of polyethylene glycol, polypropylene glycol, polycaprolactone and polybutylene adipate terephthalate. The fluorine-free polymer processing aid provided by the application comprises a polyurethane-based polymer and a synergist, and the two jointly act to effectively reduce melt fracture and die build-up, improve the flow stability of a polyolefin melt, ensure the smooth surface of an extruded product, and be suitable for various processing environments; the processing aid not only has excellent processing performance, but also has low production cost and good environmental protection characteristics, and provides an efficient and sustainable solution for the polyolefin processing industry.

This invention discloses a thermometer fixture suitable for transient processes in cryogenic systems, comprising a front guide tube, a rear guide tube, and a temperature measuring block with a temperature sensor mounting interface. The first end of the front guide tube and the first end of the rear guide tube are respectively connected to process piping, and the second ends of the front guide tube and the rear guide tube are respectively connected to the temperature measuring block. A heat exchange channel is formed inside the temperature measuring block, which communicates with the internal channels of the front and rear guide tubes to form a through-flow fluid channel. The fluid being measured can flow through the heat exchange channel and exchange heat with the temperature measuring block. This invention employs a through-flow structural design, combined with a temperature measuring block made of high thermal conductivity material and an optimized flow channel structure, significantly reducing the thermal inertia and thermal resistance of the temperature measuring system and improving the transient thermal response speed. It is particularly suitable for temperature measurement in cryogenic transient conditions such as superconducting cryogenic systems and modular hydrogen liquefaction equipment in the 20–30 K temperature range.

This invention discloses an environmentally friendly, low-emission bag filter dust collector, relating to the technical field of bag filter dust collectors. The dust collection box has several mounting seats evenly embedded at equal intervals at its top. An outer frame tube is threaded onto the outer side of the bottom of each mounting seat, and an inner frame tube is threaded onto the inner side of the bottom of each mounting seat. An outer bag is fitted onto the outer side of the outer frame tube, and an inner bag is embedded into the inner wall of the inner frame tube. Several through slots are formed at equal angles along the circumference at the top of the mounting seat corresponding to the position between the outer and inner frame tubes. This invention can construct a dual-channel dust collection path and a synchronous dust removal path. During dust collection, the dust collection pressure is monitored in real time, enabling automatic switching between the two paths. This indirectly achieves uninterrupted dust collection and continuous dust removal, improving the compatibility and stability between dust collection and dust removal operations, enhancing the dust collection effect, reducing the wear rate of the outer and inner bags during operation, extending their effective service life, and indirectly improving their endurance stability and working efficiency.

The utility model discloses a two-stage cooling system suitable for a wind turbine generator gearbox, which is used for realizing efficient cooling of high-temperature lubricating oil in the wind turbine generator gearbox and improving the operation performance and the reliability of the gearbox. The system mainly comprises a gear box, an intermediate heat exchanger and an air cooling heat exchanger, wherein the gear box and the intermediate heat exchanger are located in a wind turbine generator cabin; the intermediate heat exchanger is provided with a high-temperature lubricating oil heat exchange side and a low-temperature working medium heat exchange side. Lubricating oil flows to the high-temperature side of the intermediate heat exchanger from the gear box through a pipeline and returns to the gear box after being cooled, and a lubricating oil heat dissipation cooling loop is formed. Meanwhile, the air cooling heat exchanger is connected with the low-temperature side of the intermediate heat exchanger through a pipeline to form a heat dissipation cooling loop of the phase change working medium. By introducing a two-stage cooling mechanism, the cooling efficiency of the gear box is effectively improved, the stable operation of the wind turbine generator under various environmental conditions is ensured, the maintenance cost is reduced, and the service life of equipment is prolonged.

This utility model relates to a screw 3D printing extrusion device that controls melt pressure using a branch melt channel piston. The melt pressure is controlled by the volume change of the branch melt channel piston, thereby achieving retraction, transitional extrusion, and continuous precise extrusion in the screw 3D printing extrusion device. It includes a main melt channel and branch melt channels, with a piston device installed within each branch melt channel. The main melt channel is connected to the branch melt channel on the left, and the screw extrusion device is installed on the right. A nozzle is installed below the branch melt channel, and an external piston drive device is installed above it. A piston control system controls the rotation of a piston drive motor, thereby driving the piston to reciprocate within the branch melt channel. The beneficial effects of this utility model are: by adjusting the piston speed and stroke, melt pressure fluctuations are reduced, completely solving the problems of non-retraction and precise controllable extrusion in screw extrusion 3D printing systems, thus improving the printing quality of screw extrusion 3D printing systems.

A flow control circuit for an actuator is provided. The actuator comprises a first chamber (111) and a second chamber (112), wherein the first chamber experiences a volume change that is larger than a volume change experienced by the second chamber upon actuation of the actuator (110). The flow control circuit (10) comprises a first port (11) configured to be connected to the first chamber (111), a second port (12) configured to be connected to the second chamber (112), and a flow control valve assembly (20) comprising one or more valves configured to provide a flow of pressurized fluid from a pressurized fluid source (41) to one of the first and second ports (11, 12) along a fluid supply path and further configured to provide a flow of fluid from the other of the first and second ports (11, 12) to a fluid sink (42) along a fluid return path. The flow control circuit (10) further comprises a fluid bypass path (30) comprising a bypass valve (31) .