50results about How to "Improve flow uniformity" patented technology

The invention relates to the field of water electrolysis hydrogen production, and discloses a bipolar plate, a PEM electrolytic bath, a PEM fuel cell and a new energy vehicle, the bipolar plate comprises a bipolar plate body, and the bipolar plate body is provided with a water inlet channel, a water outlet channel and a first reaction tank; the first reaction tank is formed on the anode side surface of the bipolar plate body and is sequentially divided into a water inlet distribution area, an anode reaction area and a water outlet confluence area along the length direction of the bipolar plate body, the water inlet channel is communicated with the water inlet distribution area, the water outlet channel is communicated with the water outlet confluence area, and the water inlet channel and the water outlet channel are staggered in the length direction of the bipolar plate body; the water inlet distribution area is provided with a shunting direct connection section which is aligned and communicated with the water inlet channel and a shunting dislocation section which is staggered with the water inlet channel in the length direction of the bipolar plate body, a first shunting flow channel is formed in the shunting direct connection section, a second shunting flow channel is formed in the shunting dislocation section, and the circulation resistance of the first shunting flow channel is greater than that of the second shunting flow channel. The bipolar plate provided by the invention has good electrolytic efficiency and performance.

The invention proposes a circuit breaker power module layout optimization method and system based on multi-chip current sharing, and relates to the technical field of power electronics, and the method comprises the steps: collecting parasitic parameters of a circuit breaker power module, and constructing a first switch transient circuit model according to the parasitic parameters; constructing a conduction transient process circuit based on the first switch transient circuit model and the conduction transient characteristics; performing current equalization on the conducted transient process circuit according to the common-source inductance compensation function so as to perform state updating on the conducted transient process circuit, and obtaining a second switch transient circuit model corresponding to the conducted transient process circuit after state updating; extracting a parasitic inductance parameter in the second switch transient circuit model by adopting an ANSYS Q3D simulation tool, and performing multiple iterative optimization on the copper layer shape and the copper layer size of each power tube in the second switch transient circuit model through finite element simulation according to the common-source inductance compensation function and the parasitic inductance parameter; and obtaining an optimized layout scheme of the circuit breaker power module. According to the invention, the problem of local overload caused by non-uniform current distribution can be avoided, and the current sharing degree of the device under the condition that multiple chips are connected in parallel can be improved.

The invention provides a heat exchange plate, a heat exchange unit and a heat exchange core, and belongs to the technical field of heat transfer. The technical problems of low heat exchange efficiency, low welding spot density, low structural strength, stress concentration, gas-liquid separation, bypass, lateral flow and the like of an existing water heating connection structure are solved. The heat exchange plate comprises a plurality of wave crest units which are transversely distributed along a plate body, the horizontal sections of the wave crest units are discontinuous curves, a groove unit is formed between every two adjacent wave crest units, each wave crest unit comprises a plurality of wave crests which are vertically distributed along the plate body, and the horizontal sections of the wave crests are arc sections. Two adjacent wave crests are opposite to each other, a flow guide groove is arranged between the head and the tail of the two adjacent wave crests, a recess capable of being communicated with the two adjacent flow guide grooves is arranged between the two adjacent flow guide grooves, and the groove is communicated with the recess. The heat exchanger has the advantages that the heat exchange efficiency is high, and the welding spot density can be improved within the same range.

The present invention relates to a flow channel structure of an alkaline electrolytic cell and an alkaline electrolytic cell, the flow channel structure comprises a plate body, the plate body is provided with an inlet end and an outlet end; a dotted spoiler structure unit is distributed on the plate body, the dotted spoiler structure unit forms a fluid flow channel on the plate body, the dotted spoiler structure unit comprises a first-level spoiler structure unit, a second-level spoiler structure unit, and a third-level spoiler structure unit, the first-level spoiler structure unit, the second-level spoiler structure unit and the third-level spoiler structure unit form a shunt flow channel on the plate body. The present invention promotes the lateral flow capacity and mass transfer rate of the electrolyte, effectively improves the flow uniformity of the electrolyte, makes the electrolyte fully utilized in the process of electrolysis, and effectively improves the electrolysis efficiency. And it can effectively discharge the gas generated by the electrolysis reaction, reduce the generation of local hot spots, and effectively improve the service life of the alkaline electrolytic cell.

The invention discloses a 3D printing integrated injector. An ignition channel penetrates through a head cavity A and a head cavity B and is located between the head cavity A and the head cavity B; the nozzles A and the nozzles B are of an integrated coaxial structure and are evenly distributed on the periphery of the ignition channel in the circumferential direction. Wherein the nozzle A comprises inlet holes and a straight channel, the inlet holes are located in the head cavity A, and at least four inlet holes are evenly distributed in the circumferential direction and communicate with the straight channel in the center; the nozzle B is located in the head cavity B and comprises a flow equalizing ring cavity, a contraction channel and an outlet ring seam; the overall appearance section of the flow equalizing ring cavity and the contraction channel is in a circular truncated cone shape, the front end of the contraction channel is an outlet circular seam formed between the side wall of the outlet end of the straight channel of the nozzle A and the bottom B, and a mixing area is formed between the outlet end of the straight channel of the nozzle A and the bottom B; an annular cavity is formed between the outer walls of the head cavity A and the head cavity B, namely the annular wall with the flow equalizing hole and the outer wall of the cavity, an inlet is formed in the outer wall of the cavity, and the ignition channel, the head cavity A, the head cavity B, the chamber pressure measuring channel, the nozzle A and the nozzle B are integrally printed and formed in a 3D mode.

The invention relates to an integrally welded thrust chamber structure, which is characterized in that the inner wall of a combustion chamber is welded with the inner wall of a spray pipe through electron beams, and the outer wall of the combustion chamber and the outer wall of the spray pipe are respectively welded with a connecting ring, so that the combustion chamber is welded with an extension section of the spray pipe; the flow equalizing effect is achieved through the middle annular cavity, the fuel collector is welded to the combustion chamber, and the fuel inlet flange serves as a fuel inlet and is welded to the fuel collector. A spray pipe inlet collector is omitted, the layout is compact, the structure is simple, and the overall weight of the thrust chamber is reduced.

The invention provides a method for assisting and strengthening a chemical reaction of a flow battery based on local ultrasound, which comprises the following steps of: (1) arranging ultrasonic transducers on bipolar plates of a positive half battery and a negative half battery of the flow battery, the arrangement position of the ultrasonic transducer on the bipolar plate and the size of the ultrasonic transducer enable the action area of ultrasound applied by the ultrasonic transducer to cover the flow dead zone in the porous electrode; (2) connecting a signal generator with an ultrasonic transducer through a power amplifier; and (3) in the operation process of the flow battery, starting the signal generator and the power amplifier to apply ultrasound to the flow battery through the ultrasonic transducer, and improving the flow velocity and the flow uniformity of the electrolyte in the porous electrode by utilizing the ultrasound so as to strengthen the chemical reaction of the flow battery. According to the method, the flow uniformity of the electrolyte in the porous electrode can be effectively improved, the flexible regulation and control of the flow field in the porous electrode of the flow battery are realized, and the ultrasonic power consumption of the regulation and control of the flow field in the electrode is reduced.

The invention relates to the technical field of metallurgical equipment, and discloses a horizontal waste heat boiler and an anti-slagging optimization method and system.The system comprises an uptake flue, a radiation chamber, a convection chamber, an ash hopper, a baffle, a heat exchange tube panel, a sieve pore baffle and a streamline baffle; the method comprises the steps that a horizontal waste heat boiler numerical simulation model is built, and a baffle, a heat exchange tube panel and other components are subjected to model building according to the equal proportion of 1: 1; grid division is carried out on the built horizontal waste heat boiler numerical simulation model, and local flow characteristics and temperature distribution are captured; a multiphase mass point grid method is used, gas phase motion is described by adopting a volume average Navier-Stokes equation under an Euler framework, and particle motion is tracked by adopting a Newton second law under a Lagrange framework; and selecting a value simulation model and a value simulation method suitable for the gas-solid two-phase flow and heat exchange process of the waste heat boiler. The heat exchange capacity of the waste heat boiler is improved; the recovery rate of smoke particles is increased; and slagging of parts in the waste heat boiler is reduced.

The invention discloses engraving equipment for a flexible printed circuit board, and belongs to the technical field of flexible printed circuit board machining.The engraving equipment comprises a rack placed above the ground, a collecting tank is fixedly installed at the upper end of the rack, and a conveying frame is fixedly installed above the collecting tank; a support is fixedly installed at the upper end of the conveying frame, movable pipes are evenly and rotationally installed on the support, and spray heads are evenly installed on the movable pipes. A driving assembly for driving the movable pipe to rotate in a reciprocating manner is mounted on the rear side of the bracket; a pressure adjusting assembly used for adjusting the liquid spraying pressure of the spray head is arranged between the support and the pressure adjusting bin. According to the engraving equipment for the flexible printed circuit board, multi-direction swing adjustment of the spray head can be achieved, it is ensured that etching liquid on the board body can flow uniformly and be updated, the board body can be slightly shaken, the phenomenon that the etching rate is reduced due to formation of a water film is avoided, and the etching effect is effectively improved.

The invention discloses an ingredient stirring device for injection molding of automotive upholstery. The ingredient stirring device comprises a storage module, a feeding module, a mixing module, a conveying module and a control module. The storage module is provided with a plurality of groups of storage bins for storing particles, powder and liquid materials, the material level is monitored in real time through a sensor, and continuous feeding is guaranteed; a multi-section variable-diameter spiral feeding device and a weighing type metering device of the feeding module realize accurate conveying and proportional control of materials; the mixing module is composed of a mixing chamber, a dynamic stirring system and a temperature control device, the stirring system is driven by a servo motor, efficient and uniform mixing is achieved by adjusting the angle and speed of stirring blades, and the temperature control device keeps the temperature stable in the mixing process; the conveying module conveys the mixed materials to an injection molding machine through a discharging pipeline and a detachable filtering system; the control module integrates a touch screen and a Bluetooth module and is used for real-time monitoring and remote operation. The device is high in batching uniformity and high in feeding precision, and meets the requirements of injection molding production of automotive upholstery.

The utility model discloses a liquid cooling plate which comprises an upper cover plate and a lower cover plate, and a main flow channel is formed between the upper cover plate and the lower cover plate; the water inlet nozzle is communicated with the water inlet of the main flow channel and is used for allowing a refrigerant to flow in; the water outlet nozzle is communicated with a water outlet, corresponding to the water inlet, of the main runner and is used for allowing a refrigerant to flow out; the heat exchange columns are arranged in the main flow channel, and the densities of the heat exchange columns in different areas in the main flow channel are different. According to the liquid cooling plate, the plurality of heat exchange columns are arranged, so that the structural strength of the liquid cooling plate can be enhanced, the contact area between a refrigerant and the flow channel wall can be increased, and the heat exchange efficiency is improved. Besides, the heat exchange columns with different densities are arranged in different areas, so that the flow distribution of the refrigerant in the flow channel can be optimized, the refrigerant is uniformly distributed, and the uniformity of the heat dissipation performance of the liquid cooling plate is improved.

The present application relates to the technical field of turbine double-sided array blade processing of an aero-engine, and particularly relates to a turbine double-sided array blade integrated forming electrolytic machining tool and method, through the continuous feeding of the left and right tool cathodes to the direction of the part to be processed at the same time, the double-sided array blade is simultaneously machined; the machining tool comprises a cathode clamping block, a tool cathode, a sealing device and a support seat device; a plurality of electrolyte input channels are arranged on the left and right sides of the support seat, the liquid of the electrolyte input channels passes through the flow blocking cavity of the sealing device, the electrolyte is integrated and then flows into the machining area, then flows to the current collection area arranged in the cathode clamping block through the built-in plastic insulation device of the tool cathode, and finally flows out of the electrolyte output channel. Through the double-sided multi-feature integrated forming electrolytic machining technology, the machining efficiency and machining precision can be improved; the electrolyte flow channel adopting the reverse flow type flow field design can effectively improve the uniformity of the flow field.

The present invention relates to the technical field of electric vehicle heat pump systems, and discloses a heat exchanger suitable for electric vehicle heat pump systems, including a first collecting pipe and a second collecting pipe, a heat exchange zone is arranged between the first collecting pipe and the second collecting pipe, and the interior of the heat exchange zone includes flat tubes and fins. In the present invention, the two processes of the heat exchanger are coordinated with the multiple inlets and outlets of the upper cavity and the resistance plate is arranged in the second collecting pipe to make the flow of the refrigerant in the heat exchanger more uniform, so that the flow uniformity is greatly improved, especially when the refrigerant evaporates in the heat exchanger in the heat pump mode, due to the increase in the heat exchange area, the flow resistance is also lower, which also helps to improve the heat exchange capacity of the system, so that its heat exchange efficiency is higher, and a larger heat exchange amount is obtained, which is beneficial to improve the performance of the heat exchanger, and the condensation performance of the refrigerant in the heat exchanger in the cooling mode is not affected.

The invention relates to the technical field of armored heating cables, and provides a high-stability armored heating cable which comprises a heating wire and an insulating sleeve which is arranged outside the heating wire and forms an insulating wire core. When the positioning sleeve absorbs heat, heat energy can be guided into the heat storage cavity through the heat conduction rod, so that the expansion material is promoted to expand, the plug plate is pushed to enable cooling liquid to flow to the water flow groove for cooling, and the armored heating cable is prevented from losing efficacy at the extreme temperature; through the spiral water flow grooves, the contact area of cooling liquid and the positioning sleeve can be increased, turbulent flow is increased, the flowing uniformity is improved, and the heat exchange efficiency is improved; the temperature is reduced through the heat absorption dissolution reaction, the spare inner balloon is further arranged in the fractured micro balloon, and the cooling effect continues to be provided or the same time double cooling effect is achieved when the temperature rises next time; the insulating wire cores can be stabilized, the overall structural stability of the cable is improved, meanwhile, the excellent heat conduction performance is provided, and the stability and safety of the electrical performance are ensured.

The present application discloses a domestic waste incinerator and a method for controlling secondary air distribution in a furnace, wherein the angle between the front arch wall surface of the furnace and the horizontal is 25°, the angle between the rear arch wall surface and the horizontal is 35°, a flame folding angle and an ignition burner are arranged on the rear arch, the inlet of the first flue is located in the front middle part of the furnace, the first flue is surrounded by water-cooled walls, the water-cooled walls extend to the middle part of the refractory furnace wall along with the front arch, the rear arch, the side wall and the flame folding angle, a secondary air duct group is arranged at the lower part of the first flue, and the air outlet of the secondary air duct group forms a double elliptical flow field in the first flue. It can be seen that the design method of the secondary air duct of the flue has a stronger anti-interference ability than the double tangent circle, and can still increase the flue gas disturbance, improve the uniformity of the flow field and protect the wall surface from overheating when the combustion conditions change frequently. By increasing the inclination angle of the rear arch and increasing the flame folding angle, the stable combustion effect of the furnace is improved, and the newly-entered garbage is easier to dry, precipitate volatiles, and ignite, thereby enhancing the stable combustion ability of the incinerator.

The utility model discloses a water-air intercooler capable of improving the heat dissipation effect, and belongs to the technical field of radiators. Comprising a heat dissipation core body which is provided with a plurality of gas channels and liquid channels which are arranged at intervals; the water inlet seal head and the water outlet seal head are arranged on the two sides of the heat dissipation core body respectively, the water inlet seal head is provided with a water inlet, the water outlet seal head is provided with a water outlet, and the two ends of the liquid channel are communicated with the water inlet and the water outlet respectively; and the fan cover is connected to the end face of the heat dissipation core body, an air guide channel is defined by the fan cover, and all the gas channels communicate with the air guide channel. The air guide channel is formed by arranging the fan cover and communicates with the gas channel, cooling air is effectively guided in a centralized mode, the problems that in a traditional structure, airflow distribution is uneven, and a heat dissipation blind area exists are solved, and the heat exchange efficiency is remarkably improved.

This invention discloses a display panel and a display device, belonging to the field of display technology. The display panel includes a first substrate, a second substrate, and a plasma layer disposed opposite to each other. The plasma layer includes at least a first channel and a second channel, and plasma containing color-developing particles is disposed in the first and second channels. In a first region of the plasma layer: the first channel includes at least a first sub-channel and a second sub-channel, which are adjacent to each other, interconnected, and both extend along a first direction; along a second direction, at least a portion of the second channel is located on the side of the first sub-channel away from the second sub-channel, and at least a portion of the second channel is adjacent to the first sub-channel; at least a portion of the second channel is located on the side of the second sub-channel away from the first channel, and at least a portion of the second channel is adjacent to the second channel. The display device includes the above-described display panel. This invention enables uniform distribution of the electrophoretic liquid in an electrophoretic display device, improving the display effect.

The present application relates to a heat exchanger, which is provided with a heat inlet collecting channel, a multi-layer heat circulation channel layer and a heat outlet collecting channel connected in sequence. The heat exchanger is also provided with a cold inlet collecting channel, a multi-layer cold circulation channel layer and a cold outlet collecting channel connected in sequence. The hot circulation channel layer is provided with a guide plate group extending along a direction perpendicular to a first preset direction, and the guide plate group is provided with a plurality of guide channels distributed along a direction perpendicular to the first preset direction. A first partition extending along a second preset direction is provided between the cold inlet collecting channel and the cold outlet collecting channel to divide the cold circulation channel layer into a first channel and a second channel, and a first notch is provided at one end of the first partition near the fourth end. The cold inlet collecting channel is provided on the side of the third end near the second end, and the cold outlet collecting channel is provided on the side of the third end near the first end. The heat exchanger provided by the present application solves the problem of low heat exchange efficiency of existing heat exchangers.

This utility model discloses a composite duct structure, belonging to the field of ventilation equipment technology. The composite duct structure includes an inlet duct and an outlet duct. Connecting plates are fixedly connected to both ends of the inlet and outlet ducts. Two clamping plates are engaged between the connecting plates at their closest ends. Opening slots are provided on the top of both sides of each clamping plate, and T-shaped clamping rods are installed within these slots. Return springs are installed on the outer periphery of each T-shaped clamping rod. One end of the T-shaped clamping rod passes through the clamping plate and engages with the corresponding connecting plate. Guide plates are installed inside the inlet and outlet ducts. This design effectively solves the problems of cumbersome installation, difficult disassembly, and easy damage to the duct or surrounding structure in traditional composite duct connection methods, as well as uneven internal airflow distribution and lack of effective filtration structures. It improves the convenience of duct installation and disassembly, reduces maintenance costs, and optimizes ventilation and air quality.

The invention discloses a control method of an immersed liquid-cooled cabinet, electronic equipment, a device and a readable medium, a temperature sensor is arranged at the bottom of the cabinet, and an opening in the center of the bottom of the immersed liquid-cooled cabinet is aligned with an opening of a fluid oscillator. A left side spoiler is arranged on the side, close to an opening and away from an inlet, of a left side bypass in the fluid oscillator, and a right side spoiler is arranged on the side, close to the opening and away from the inlet, of a right side bypass. Under the condition that the average value of the first temperature detection values is larger than a preset temperature threshold value, the left side spoiler and the right side spoiler are controlled to be in a completely-opened state; under the condition that the average value of the first temperature detection values is smaller than or equal to a preset temperature threshold value, second temperature detection values of the temperature sensors are obtained after a preset duration; and the opening and closing state of the left side spoiler and the opening and closing state of the right side spoiler are controlled according to the second temperature detection values and the first temperature detection values.

The present application relates to a kind of dish washer and its control method, dish washer includes cabinet, front side is open;Door body, can be movably arranged at the opening of cabinet, to open or close cabinet;Air inlet assembly, including air inlet pipe, located in the outside of cabinet, the air inlet pipe is equipped with with its inside communication air inlet and first air outlet;Fan, for driving airflow from air inlet to flow to first air outlet;Air outlet pipe, air inlet end is communicated with first air outlet, and the air outlet end of air outlet pipe is located in cabinet;Moving plate, transversely arranged and can be movably arranged in cabinet along front and back direction, the moving plate is equipped with air outlet hole, the air outlet hole is located in the flow path of the airflow that the air outlet end of air outlet pipe flows out, and airflow coverage area is large.

The utility model relates to the technical field of zeolite molecular sieves, and provides an adsorption device adopting a novel material zeolite molecular sieve, which comprises a treatment box body, a fixed end plate is arranged at the top of the right side box wall in the treatment box body, and a filter assembly is inserted on the left end surface of the fixed end plate. A movable end plate is inserted into the left end of the filtering assembly, a movable end plate moving mechanism capable of driving the movable end plate to be separated from the filtering assembly leftwards is installed on the box wall of the top of the treatment box body, and the filtering assembly is formed by combining an outer fixing cylinder, a zeolite molecular sieve layer and vent holes. The adsorption device adopting the new material zeolite molecular sieve has remarkable advantages in the aspect of facilitating replacement of the filtering assembly, the operation process is simplified, the working efficiency is improved, the operation safety and the stability of the device are ensured, and a reliable technical guarantee is provided for the waste gas treatment process.

The utility model discloses an extruding machine equipment structure for producing non-ferrous metal seamless tubes, which comprises an extruding barrel shell and an extruding barrel lining fixedly mounted on the inner side of the extruding barrel shell, an extruding rod is arranged in the extruding barrel lining, a core rod support is arranged in the extruding rod, a die holder is arranged on the right side of the extruding barrel shell, and the core rod support is arranged on the right side of the die holder. And a core rod body is arranged on the left side of the mold base, a driving motor is fixedly installed on the outer side of the extrusion barrel shell, and a stable extrusion mechanism is fixedly arranged at the output end of the driving motor. According to the extruder equipment structure for producing the non-ferrous metal seamless tube, the whole conical die is beneficial to stable flowing of metal during extrusion, concentrated deformation is changed into gentle deformation, the extrusion force is reduced, the severe degree of metal deformation is reduced through low-speed extrusion, the flowing uniformity of the metal is improved, and the problem that a tube body cracks when a flat die is used for extrusion is solved; and the surface quality, the internal structure and the performance quality of the pipe are improved, the yield of the pipe is increased, and the die loss is reduced.

The invention discloses a separation and detection method and device for miniature integrated fluorescent gas chromatography, and belongs to the technical field of gas chromatography. According to the method, an enrichment module, a sample introduction module, a separation module and a detection module are creatively integrated by combining an MEMS micromachining technology with a fluorescent sensing technology; the miniaturization, portability and intellectualization of the gas chromatograph are realized; according to the device, an analyte is pre-concentrated through the enrichment module, so that the sensitivity of sample detection is improved; the separation module is used for efficiently separating complex analytes; the fluorescence sensor is used as a detection module, nondestructive qualitative and quantitative detection of analytes is realized, and the whole device has the advantages of small size, low power consumption, fast response, high sensitivity, high integration level and the like, and is suitable for distinguishing and identifying, fast and reversible in-situ real-time detection of micro-trace gas in the fields of environmental monitoring, industrial production, express logistics and the like.

The utility model belongs to the technical field of bipolar plates, and particularly discloses a hydrogen fuel cell bipolar plate which comprises an anode plate and a cathode plate, the anode plate and the cathode plate are overlapped and attached, and a cooling inlet, an air inlet and a hydrogen inlet penetrate through one end of the anode plate and one end of the cathode plate. A hydrogen outlet, an air outlet and a cooling outlet penetrate through the other ends of the anode plate and the cathode plate, a wavy hydrogen flow channel is arranged on the front surface of the anode plate, the hydrogen inlet is communicated with the hydrogen outlet through the hydrogen flow channel, a throttling table is arranged in the hydrogen flow channel, a cooling flow channel is arranged on the back surface of the anode plate, and the cooling inlet is communicated with the cooling outlet through the cooling flow channel; an air flow channel is formed in the back surface of the cathode plate; the air inlet is communicated with the air outlet through the air flow channel. According to the utility model, the front surface of the anode plate adopts the design of the wave-shaped hydrogen flow channel, and the throttling table is arranged in the hydrogen flow channel, so that the flow efficiency and uniformity of hydrogen in the flow channel are improved, the effective contact between the hydrogen and an anode catalyst is promoted, and the power generation efficiency of the battery is improved.

The invention discloses a vacuum drying device. The vacuum drying device comprises a mounting cover, an inner cover and an extraction opening, a mounting space for accommodating a substrate is formed in the mounting cover, a plurality of uniformly distributed first air holes are formed in the mounting cover, the first air holes are communicated with the mounting space, and at least part of the first air holes are located above the substrate; the inner cover covers the mounting cover, the inner cover and the mounting cover are arranged in a spaced mode, a first cavity is formed between the inner cover and the mounting cover, the first cavity is communicated with the mounting space through the first air holes, and a plurality of second air holes which are evenly distributed are formed in the upper portion of the inner cover; an extraction opening is communicated with the second air hole and is positioned above the inner cover; and gas in the mounting space sequentially flows to the first gas hole, the first cavity, the second gas hole and the extraction opening. The upper air exhaust vacuum drying device is simple in structure and low in installation precision requirement.

The utility model discloses an oblique folding wave anti-blocking counter flow type cooling tower packing sheet with bonding points, and belongs to the technical field of cooling tower packing. The cooling structure comprises a group of transverse flow channel cooling structures and oblique flow channel cooling structures, the transverse flow channel cooling structure comprises a set of first protrusions, a vertical first channel is formed between every two adjacent first protrusions, and a set of first retention areas are arranged in each first channel. The inclined flow channel cooling structure comprises a group of second bulges, an inclined second channel is formed between the adjacent second bulges, and a group of second retention areas are arranged in the second channel; the first channels and the second channels are in one-to-one correspondence and staggered arrangement, and inclined flow guide planes are arranged between the first channels and the second channels. Based on the alternate structural design of the transverse flow channels and the inclined flow channels, the transverse flow channels can provide a larger contact area, so that cooling water can be in full contact with the surface of the filler, and the heat and mass transfer efficiency is improved; the introduction of the inclined flow channel provides flow paths in different directions for the water flow, so that the water flow can be more uniformly and stably distributed in the whole filler.

The present invention belongs to a flow balancing device, and specifically relates to a fluid flow balancing unit, a flow diversion module and a flow balancing device. The fluid flow balancing unit includes two flow balancing plates and a guide plate located between the two flow balancing plates. The upper part of the guide plate is provided with a protrusion for single-stream fluid flow balancing. The upper part and the side of the flow balancing plate protrude from the guide plate. The protrusion and the guide plate form a guide groove through which the fluid passes. The fluid flow balancing unit of the present invention can divide a single-stream fluid into equal parts. When the fluid flow balancing units are combined to form a fluid flow balancing device, fluid flow balancing can be performed with good effect. The overall structure is simple and the operation is convenient. Excellent flow balancing effect can be achieved only by gravity.

The invention relates to a crucible structure for growth of a low-carbon inclusion low-stress silicon carbide single crystal and a growth method, a seed crystal support, a TaC isolating ring and a flow guide filtering assembly are sequentially arranged at the upper part in the crucible from top to bottom, and the flow guide filtering assembly is composed of multiple layers of TaC microporous rings, a TaC microporous plate and a TaC flow guide cylinder from bottom to top; the multi-layer TaC microporous ring comprises at least two annular microporous rings which are coaxially arranged, and the inner diameter and the outer diameter of the lower-layer microporous ring are larger than those of the upper-layer microporous ring. The crucible structure disclosed by the invention is provided with the flow guide filtering assembly, the flow guide filtering assembly changes an edge flow field, carbon particles from powder graphitization are concentratedly deposited in an edge polycrystalline deposition area, the carbon particles in the powder are prevented from participating in crystal growth, and the silicon carbide single crystal with a low-carbon inclusion is obtained.

The utility model discloses a screw extrusion device for composite fibers, which comprises a screw extruder body, and the screw extruder body is provided with an extrusion pipeline; a feeding hopper is arranged on the extrusion pipeline, the feeding hopper is communicated with an inner cavity of the extrusion pipeline, a supporting frame is arranged in the feeding hopper, a disturbance rod is arranged on the supporting frame, a driving assembly is further arranged on the supporting frame, and the driving assembly is matched with the disturbance rod, so that the disturbance rod shakes in the feeding hopper to prevent material blockage; the feeding device has the advantages that the disturbance rod driven by the driving assembly is arranged in the feeding hopper and shakes in the movable hole of the supporting frame in a non-rotating mode, the bridging or arching phenomenon possibly formed in the feeding process of raw materials is actively destroyed, blocking of the materials in the feeding hopper is effectively prevented through dynamic disturbance, and the feeding efficiency is improved. And the flowing uniformity and continuity of the raw materials entering the extrusion pipeline are obviously improved, so that the stable operation of the extrusion process is ensured.