47results about How to "Avoid vortex phenomenon" patented technology

The invention discloses a pipeline configuration structure of a triple-inlet air cooler system for hydrogenation reaction effluents. The pipeline configuration structure is characterized in that an inlet header pipe is perpendicularly downwardly communicated with a middle point of a first pipeline, two ends of the inlet header pipe are respectively communicated with a second pipeline and a third pipeline, and a plane formed by the second pipeline and the third pipeline is perpendicular to a plane formed by the inlet header pipe and the first pipeline; the tail end of the second pipeline and the tail end of the third pipeline are perpendicularly communicated with a fourth pipeline, two ends and the center point of the fourth pipeline are respectively perpendicularly communicated with a fifth pipeline, a seventh pipeline and a sixth pipeline, a plane formed by the fifth pipeline, the seventh pipeline and the sixth pipeline is perpendicular to a plane formed by the first pipeline, the second pipeline and the third pipeline, and the fourth pipeline is quartered by three joints along the length direction of the fourth pipeline and the three joints are formed by the fourth pipeline jointed with the second pipeline, the third pipeline and the sixth pipeline respectively and the tail end of the fifth pipeline, the tail end of the sixth pipeline and the tail lend of the seventh pipeline are perpendicularly communicated with an air cooler header and quarter the air cooler header. The pipeline configuration structure has the advantages that phenomena of multi-phase flow erosion corrosion, deposition and blockage of ammonium salt and under-deposit corrosion due to uneven distribution of flow parameters of existing air cooler tube bundles can be reduced, unintended shutdown accidents are reduced, and the safe operation cycle of the air cooler system for the hydrogenation reaction effluents is prolonged.

The invention discloses a cooling fan, an air cooling system and an engine. The cooling fans are installed in the air cooling system and the engine respectively. Each cooling fan comprises a fan discand a plurality of blades connected to the fan disc and peripherally distributed. The tails of the blades are bent in the direction opposite to the rotating direction of the fan, wherein the cooling fan is in transmission fit with a driving wheel of a gearbox, the gearbox is of a CVT speed changing structure, the gearbox is integrated into an engine box, a guiding device is arranged at the inner side of an engine case cover and located between a driving shaft and a driven shaft, the upper end of the guiding device is provided with a flow guiding face, and the flow guiding face is inclined upwards from the inner side of the cooling fan to the side of an air outlet. The tails of the blades of the cooling fan are bent so that the windward sides of the blades can be in arc transition. An air flue damping coefficient is optimized, air flow is guided, and the wind resistance is effectively lowered; due to the structure, the wind resistance of the blades can be lowered, and the overall transfer efficiency of the gearbox can be improved. Meanwhile, the vortex phenomenon formed by the tails of the blades is avoided, the air volume in an air flue is optimized, the air cooling effect is improved, and noise is lowered.

The utility model provides a condensed fluid collection device at the top end of a wet chimney smoke guide plate. The condensed fluid collection device comprises a fixed support and a collecting tank, wherein the collecting tank is installed on the top end of a wet chimney smoke guide plate through the fixed support. Notches are formed in two sides of the collecting tank, a water discharging hole is formed in the lowest position in each notch, and a water discharging pipe is arranged in the water discharging hole; a reinforcing plate and a water guide plate are arranged inside the collecting tank, the water guide plate is used for guiding the collected condensed fluid to the water discharging pipe and discharging the condensed fluid out of a chimney. A smoke field in a smoke guide plate area in an inlet of the chimney is relatively complicated, the secondary entrainment phenomenon of the condensed fluid is likely to happen, the collecting device is arranged on the guide plate, the vortex generated nearby the smoke guide plate can be effectively eliminated, and the generated condensed fluid can be collected and discharged out of the chimney, so that the stack rain phenomenon caused by the secondary entrainment of the condensed fluid entering the atmosphere can be effectively avoided; meanwhile, the condensed fluid collection device is reliable, high efficient, economical, practical and easy to realize.

The embodiment of the invention discloses a volute of a centrifugal fan, the centrifugal fan and an electric appliance, and relates to the technical field of centrifugal fans. The volute of the centrifugal fan is invented for solving the problem that when an existing centrifugal fan works, noise is large. The volute of the centrifugal fan comprises a volute body, the volute body is provided with avolute tongue, the depth of the portion, located at the first position, of the volute tongue is larger than that of the portion, located at the second position, of the volute tongue, and the distancefrom the first position to the air inlet end of the volute body is smaller than that from the second position to the air inlet end of the volute body. The volute of the centrifugal fan can be appliedto electric appliances such as a dehumidifier and a mobile air conditioner.

The invention discloses a 40.5kV switch equipment system. The system comprises a switch cabinet; an instrument chamber, a handcart chamber, a feeder line chamber and a bus chamber are formed in the switch cabinet; the feeder line chamber is arranged above the bus chamber, the handcart chamber is arranged at the left side of the feeder line chamber and the bus chamber, the instrument chamber is arranged at the left upper corner of the handcart chamber, and a circuit breaker module is arranged in the handcart chamber; an upper conductive connector on the circuit breaker module is connected withan upper contact box type current transformer outlet arranged at the feeder line chamber, the inlet of the upper contact box type current transformer is connected with an upper branch bus connector through a grounding switch; a lower conductive connector on the circuit breaker module is connected with a lower contact box type current transformer outlet arranged at the bus chamber, and the lower contact box type current transformer inlet is connected with a lower branch bus connector; and the circuit breaker module comprises a frame, a vacuum arc extinguish chamber, an operating mechanism, a connecting insulation pull rod and an insulating brace rod.

The invention relates to a crystallizer model for flow field research in a crystallizer and a crystallizer flow field simulation method, and belongs to the technical field of continuous steel casting.The crystallizer model for flow field research in the crystallizer provided by the invention comprises a crystallizer body, wherein an immersion type nozzle is formed in the top of the crystallizer body; the immersion type nozzle is connected with a water inlet pipe; a water outlet is formed in the bottom of the crystallizer body; a flow distributor is arranged inside the crystallizer body. According to the invention, the flow distributor is added to the crystallizer model to avoid influence of vortex generated at an outlet of the model on a flow field in the crystallizer, so that the flow field in the crystallizer is more accurate. Then, a finite element software package ANSYS is adopted to establish a molten steel flow model in the crystallizer for simulating the flow field of molten steel in the crystallizer under various process conditions; water simulation experiment results are verified and compared; finally, the water simulation experiment results and numerical calculation results are combined with an actual site to perform optimized design on process operation parameters.

The invention relates to the technical field of dispensing machines, and discloses a PCB dispensing machine. The PCB dispensing machine comprises a cabinet, a hinged block is fixedly arranged on the front surface of the cabinet, a cabinet door is fixedly arranged on the back surface of the hinged block, a pull ring is fixedly arranged on the front surface of the cabinet door, the top of the cabinet is fixedly provided with an electronic balance, the top of the electronic balance is movably provided with a colloid blending cup, a baffle is fixedly arranged at the top of the cabinet and behind the electronic balance, and a positioning hole is formed in the top of the baffle. According to the PCB dispensing machine, a rotating disc is driven to rotate through an output shaft, the rotating disc drives a stirring rod to stir the colloid through a sliding block, a sliding groove and the sliding block slide relative to each other in the rotating process, the stirring rod is prevented from concentrically stirring the colloid to generate a vortex phenomenon, so that the colloid is uniformly stirred, meanwhile, a protective cover and the baffle are used for sealing and isolating the colloid blending cup, so that the phenomena that the colloid is splashed and the colloid is polluted by external dust are avoided, and the effect of high efficiency and dust prevention is achieved.

The invention belongs to the technical field of pipe joints, and particularly relates to an inner supporting device of a pipeline buckling joint and a full-bore buckling connection method. The inner supporting device is used for carrying out full-bore buckling connection on the pipe joint and a pipeline, and is particularly suitable for non-reducing type buckling connection of an oil conveying middle-high pressure composite pipeline and the pipe joint. According to the main technical scheme, the inner supporting device comprises a supporting body arranged in a joint core pipe, wherein the surface of the supporting body is attached to the inner wall of the joint core pipe; the supporting body is formed by splicing two or more supporting strips; and the supporting strips are provided with wedge-shaped splicing faces. The inner supporting device is simple in structure and convenient to use, and is arranged in the pipe joint, so that mounting and dismounting are facilitated; and by means of the buckling connection method of the inner supporting device, the joint core pipe cannot be radially contracted when the pipe joint and the pipeline are connected in a buckling manner, full-bore connection is achieved, and the beneficial effects of being firm in connection, tight in sealing, smooth in conveying and high in safety performance are achieved.

The invention relates to the technical field of dispensing machines, and discloses a PCB board dispensing machine, including a cabinet, a hinge block is fixedly installed on the front of the cabinet, and a cabinet door is fixedly installed on the back of the hinge block, and the cabinet door The front of the cabinet is fixedly installed with a pull ring, the top of the cabinet is fixedly installed with an electronic balance, the top of the electronic balance is movably installed with a glue mixing cup, and the top of the cabinet is fixedly installed with a baffle at the rear of the electronic balance. Positioning holes are provided on the top of the baffle. The PCB board dispensing machine drives the turntable to rotate through the output shaft, and the turntable drives the stirring rod to stir the colloid through the slider. The chute and the slider produce relative sliding during the rotation process to prevent the eddy current phenomenon caused by the concentric stirring of the stirring rod, thereby It makes the colloid stir more evenly, and at the same time, the protective cover and the baffle seal the glue mixing cup to prevent the colloid from splashing and external dust from contaminating the colloid, and achieve the effect of efficient dust prevention.

The invention relates to a high-pressure material angle valve with turbulence blades, which comprises a valve body of the angle valve, wherein the valve body of the angle valve is right angle type, a valve seat is arranged at an outlet of the valve body of the angle valve, and a valve core is mounted in the valve seat; a valve rod is mounted in the valve body of the angle valve, the valve rod andthe valve core constitute an integrated structure, and the top end of the valve rod penetrates out of the valve body of the angle valve; and the high-pressure material angle valve is characterized inthat the turbulence blades are arranged on the wall of an inner cavity of the valve body of the angle valve. The turbulence blades are respectively arranged on the wall of the inner cavity which is just opposite to an inlet of the valve body of the angle valve, the wall of the inner cavity on the left side surface and the wall of the inner cavity on the right side surface. A sealing gasket is utilized for sealing between the valve seat and the outlet of the valve body of the angle valve. The high-pressure material angle valve has the advantages of simple structure, safety and reliability, andcan greatly reduce the production cost.

The invention discloses a trussed siphon-type mud sucking machine. The trussed siphon-type mud sucking machine comprises a machine frame, walking devices, siphon frames, siphon units, isolating devices, conveying pipes, a mud discharging pipe, a connecting pipe, a pressure meter and a mud collecting tank, wherein the two ends of the machine frame are mounted at the two ends of a mud tank through the walking devices respectively; a plurality of siphon frames are arranged at the lower end of the machine frame; the siphon unit is arranged on each siphon frame; the isolating device is arranged between two adjacent siphon frames; the conveying pipes are arranged on the upper part of the machine frame; each of the siphon units is communicated with the corresponding conveying pipe; each conveyingpipe is connected with the mud discharging pipe; the pressure meter is mounted on the end part of the conveying pipes; the pressure meter is further communicated with the mud discharging pipe throughthe connecting pipe; the mud collecting tank is mounted on the end part of the mud discharging pipe. The isolating devices are used for isolating a plurality of siphon units, so that occurrence of avortex phenomenon can be effectively prevented and the efficiency is improved.

The invention discloses a multi-directional self-adaptive suspended type tidal current energy water turbine which comprises an upper balancing wing, a lower balancing wing, air guide sleeves, turbine blades, generators, connecting fixing rods and anchoring fastening rings, wherein the upper balancing ring and the lower balancing wing are installed on the upper portions and the lower portions of the air guide sleeves, the turbine blades are fixed to outer sides of rotors of the generators, the generators are fixed onto the air guide sleeves through the connecting fixing rods, and the anchoring fastening rings are installed on the outer sides of the air guide sleeves. The connecting fixing rods are three in number in a group and are uniformly arranged in a radial mode making the axis of each generator as a center, and the included angle between every two connecting fixing rods is 120 degrees. After the multi-directional self-adaptive suspended type tidal current energy water turbine is installed, a suspension system can do real-time fair current attitude regulation according to tidal current flow direction changes, the incoming flow direction is identical to the direction of the axis of each air guide sleeve, namely the incoming flow direction is vertical to the rotating plane of the blades, flow gathering effects are highly significant, and the fact that a tidal current energy power generation system has substantial generating efficiency under a low flowing speed can be guaranteed.

The invention discloses a prefabricated pump station. The prefabricated pump station comprises a prefabricated barrel, and a water inlet and a water outlet are formed in the prefabricated barrel. A pump barrel is arranged in the prefabricated barrel, and a water pump is arranged on the bottom section of the pump barrel. The upper end of the pump barrel communicates with the water outlet. Water flow falls into the bottom of the prefabricated barrel through the water inlet, is drawn into the pump barrel through the water pump located at the bottom of the prefabricated barrel and flows out through the water outlet, and a flow equalizing separation plate is arranged at the lower end of the water inlet. The flow equalizing separation plate is fixedly arranged on the inner wall of the prefabricated barrel and converts single-direction input water of the water inlet into annular water flow, and the annular water flow evenly falls onto the bottom of the prefabricated barrel. It is avoided thatthe water flow fixedly flows in a single direction at high flowing speed or impacts on the pump barrel, and consequently water flow turbulence is avoided. In particular, existing direct-in water flowis changed into the annular water flow, the flow equalizing separation plate is located around the barrel, water is drained downwards through water drainage openings evenly formed in the flow equalizing separation plate, the water flow rushing into the water inlet do not impact on the barrel directly, and therefore input water is equivalently and evenly drained downwards.

The invention relates to a high-pressure material angle valve with turbulence blades, which comprises a valve body of the angle valve, wherein the valve body of the angle valve is right angle type, a valve seat is arranged at an outlet of the valve body of the angle valve, and a valve core is mounted in the valve seat; a valve rod is mounted in the valve body of the angle valve, the valve rod and the valve core constitute an integrated structure, and the top end of the valve rod penetrates out of the valve body of the angle valve; and the high-pressure material angle valve is characterized in that the turbulence blades are arranged on the wall of an inner cavity of the valve body of the angle valve. The turbulence blades are respectively arranged on the wall of the inner cavity which is just opposite to an inlet of the valve body of the angle valve, the wall of the inner cavity on the left side surface and the wall of the inner cavity on the right side surface. A sealing gasket is utilized for sealing between the valve seat and the outlet of the valve body of the angle valve. The high-pressure material angle valve has the advantages of simple structure, safety and reliability, and can greatly reduce the production cost.

The invention discloses an evaporation chamber of a vacuum hot water boiler, comprising a boiler cavity, wherein the upper half part of the boiler cavity is a heat exchange cavity, the lower half part of the boiler cavity is an evaporation cavity in which a hearth and a smoke tube are arranged, heat exchange tubes are arranged in the heat exchange cavity, and the cross section of the top part of the heat exchange cavity is a circular arc. The evaporation chamber of the vacuum hot water boiler also comprises a rectification barrel which is sheathed outside the heat exchange tubes and comprisesa barrel body, both ends of the barrel body are provided with fixed ends, the upper half part between the two fixed ends of the barrel body is provided with a vapor inflow port, and the bottom of thebarrel body is provided with more than two condensed water outflow channels. By adopting the evaporation chamber of the vacuum hot water boiler, on one hand, the flow rate of water vapor is increasedso that the heat exchange efficiency between the water vapor and the heat exchange tubes is increased; and on the other hand, as the water vapor flows inside through the vapor inflow port, the flow rate of the water vapor among the heat exchange tubes is accelerated, and condensed water flows out from the condensed water outflow channels so that the contact area between the condensed water and the water vapor is reduced, thereby the heat exchange efficiency is further enhanced.

The invention discloses a low-energy air purification system. The low-energy air purification system comprises an intake filtering unit, an air return channel, a first blade wheel, an air return filtering unit and electrostatic dust collection devices, wherein a first flow equalization device is transversely arranged at the lower end of the intake filtering unit; the air return channel is arranged in the indoor side wall; the first blade wheel is transversely arranged between the intake filtering unit and the first flow equalization device, a center rotary shaft of the first blade wheel penetrates an indoor ceiling upwards and is connected with a drive mechanism, and a bottom channel is transversely arranged at the indoor bottom; an intake opening of the air return filtering unit communicates with the indoor bottom space, and an air outlet of the air return filtering unit communicates with the bottom channel; and the electrostatic dust collection devices are arranged in the portion, on the two sides of the air return filtering unit, of the bottom channel, an inlet of each electrostatic dust collection device communicates with the bottom channel, and an outlet of each electrostatic dust collection device communicates with the bottom of the air return channel. The low-energy air purification system solves the technical problem that energy consumption is too high by means of an existing air purification system.

The present invention relates to a nozzle for a paint spraying device. More particularly, the nozzle relates to a nozzle for a paint spraying device. The nozzle atomizes a coating material supplied from the outside in a rotary dispersing unit for one time, and simultaneously the nozzle atomizes the coating material which is atomized in the rotary dispersing unit for one time for twice. The coatingmaterial can be micronized, the particle size of the finely divided coating particles can be ensured, thereby the coating quality is improved and the cleaning efficiency of the rotary dispersion unitis greatly improved.

The invention discloses a constant-radial-flow stable pressure clean room air supply system which comprises an air deflector, a slow flow layer, a filter screen layer and a flow equalizing plate. The air deflector is formed by splicing a plurality of grating plates. Positioning pieces are arranged on the front side of each grating plate in a protruding mode. Installation grooves are correspondingly formed in the rear side of each grating plate. The positioning pieces of each grating plate are inserted into the installation grooves of the adjacent grating plate. The slow flow layer is arranged at the lower end of the air deflector and is of a hollow bracket structure. The filter screen layer is arranged at the lower end of the slow flow layer, and the periphery of the filter screen layer and the periphery of a clean room are sealed. The flow equalizing plate is arranged at the lower end of the filter screen layer in an attached mode and arranged at the upper end of the clean room in a covering mode. The gridding density of the air deflector is gradually decreased from the center to the periphery. The air deflector with the gridding density being gradually deceased from the center to the periphery is adopted, the flow speeds of air flow in all positions of the air deflector are equalized, the technical problem that vortexes are generated in the clean room is solved, and the indoor cleanliness level is improved.

The invention provides a draught fan structure and an air-conditioner, and relates to the technical field of air-conditioners. The draught fan structure comprises a volute base and a volute cover. Thevolute base is detachably connected with the volute cover in the axis direction of the volute base, the volute cover is provided with a first cavity and a first volute tongue located in the first cavity, and the volute base is provided with a second cavity and a second volute tongue located in the second cavity, the first cavity and the second cavity are combined into an air passage, and the first volute tongue abuts against the second volute tongue. Compared with the prior art, the draught fan structure adopts the first cavity with the specific value range of 1 / 2-8 / 9 and the first volute tongue with the included angle range of 2-5 degrees, size parameters of the volute base and the volute cover are reasonably allocated, the vortex wind phenomenon is avoided, the generated noise can be effectively reduced, the noise pollution is avoided, and the practicability is high.

The invention discloses a pipeline configuration structure of a triple-inlet air cooler system for hydrogenation reaction effluents. The pipeline configuration structure is characterized in that an inlet header pipe is perpendicularly downwardly communicated with a middle point of a first pipeline, two ends of the inlet header pipe are respectively communicated with a second pipeline and a third pipeline, and a plane formed by the second pipeline and the third pipeline is perpendicular to a plane formed by the inlet header pipe and the first pipeline; the tail end of the second pipeline and the tail end of the third pipeline are perpendicularly communicated with a fourth pipeline, two ends and the center point of the fourth pipeline are respectively perpendicularly communicated with a fifth pipeline, a seventh pipeline and a sixth pipeline, a plane formed by the fifth pipeline, the seventh pipeline and the sixth pipeline is perpendicular to a plane formed by the first pipeline, the second pipeline and the third pipeline, and the fourth pipeline is quartered by three joints along the length direction of the fourth pipeline and the three joints are formed by the fourth pipeline jointed with the second pipeline, the third pipeline and the sixth pipeline respectively and the tail end of the fifth pipeline, the tail end of the sixth pipeline and the tail lend of the seventh pipeline are perpendicularly communicated with an air cooler header and quarter the air cooler header. The pipeline configuration structure has the advantages that phenomena of multi-phase flow erosion corrosion, deposition and blockage of ammonium salt and under-deposit corrosion due to uneven distribution of flow parameters of existing air cooler tube bundles can be reduced, unintended shutdown accidents are reduced, and the safe operation cycle of the air cooler system for the hydrogenation reaction effluents is prolonged.

The invention provides high-gloss water-based paint and a preparation method thereof.The water-based paint is prepared from modified ethyl acrylate, a filler, a modified dispersing agent, an antifoaming agent, a thickener, a leveling agent, a wetting agent, a modified curing agent and water, and the preparation method comprises the steps that mixing the modified dispersing agent, the modified ethyl acrylate and the water to prepare a first mixed solution; and adding the filler, the antifoaming agent, the thickener, the leveling agent and the wetting agent into the first mixed solution to prepare a second mixed solution, adding the modified curing agent into the second mixed solution, and uniformly stirring to obtain the high-gloss water-based paint. According to the invention, the phenomenon that prickly heat easily occurs on the surface of a paint film of conventional water-based paint is overcome, and meanwhile, the improved water-based paint still has good surface performance and has good application prospect.

The invention discloses an anti-swirl inclined-conveying-type industrial material stirring machine and a working method thereof. The anti-swirl inclined-conveying-type industrial material stirring machine comprises a base, a stirring box, a material stirring unit, a material conveying unit and a material vibrating device; the stirring box is supported by the base to be in an overall inclined state; material horizontal conveying units and material inclined conveying units are in one-to-one correspondence, wherein each group of the material horizontal conveying unit and the material inclined conveying unit form an L-shaped material conveying turning structure; and vibrating rods are positioned at the inner higher end of the stirring box. Material rotating stirring parts of the material stirring unit rotate to stir industrial materials in the stirring box; the two L-shaped material conveying turning structures are separately used for conveying industrial materials located at the inner lower end of the stirring box to the inner higher high end of the stirring box in an L-shaped conveying track; and the industrial materials at the inner higher end of the stirring box roll obliquely downwards along the inner bottom of the stirring box under the action of self gravity and vibration of the vibrating rods. According to the invention, the swirl phenomenon in a stirring process of industrial materials can be prevented, and thoroughness and uniformity of stirring of industrial materials are ensured.

The invention provides a draught fan structure and an air-conditioner, and relates to the technical field of air-conditioners. The draught fan structure comprises a volute base and a volute cover. Thevolute base is detachably connected with the volute cover in the axis direction of the volute base, the volute cover is provided with a first volute tongue, and the volute base is provided with a second volute tongue; the first volute tongue abuts against the second volute tongue, the range of the included angle between the first volute tongue and the axis is 2 degrees-5 degrees, and the range ofthe included angle between the second volute tongue and the axis is 0.6 degree-5 degrees. Compared with the prior art, the draught fan structure adopts the first volute tongue with the included anglerange of 2-5 degrees and the second volute tongue with the included angle range of 0.6 degree and 5 degrees, size parameters of the volute base and the volute cover are reasonably allocated, the vortex wind phenomenon is avoided, the generated noise can be effectively reduced, the noise pollution is avoided, and the practicability is high.

The invention provides a conveying system, a reaction chamber and semiconductor processing equipment. The conveying system comprises a conveying device and a gate. The conveying device is provided with a conveying channel which is communicated with the reaction chamber. The conveying channel is used as the channel for conveying processed workpieces into or out of the reaction chamber. The gate is used for opening or closing the conveying channel. The gate is arranged at the end, which is communicated with the reaction chamber, of the conveying channel. Furthermore the gate opens or closes the conveying channel in an overturning manner. The conveying system provided by the invention can prevent diffusion of process gas into the conveying channel, thereby preventing an eddy phenomenon of the process gas at the central area of the reaction chamber caused by flow speed reduction, improving distribution uniformity of the process gas in the reaction chamber and furthermore improving process quality.

The invention belongs to the technical field of IT (Information Technology) industry, and particularly relates to a ZC intelligent differential pressure balancing flowmeter. The intelligent differential pressure balancing flowmeter comprises a pressure sensor, a temperature sensor and a display and is characterized in that a dual self-locking protection regulating valve is arranged at the front end of a throttling element; the front part and the rear part of the throttling element are respectively provided with a pressure tapping ring; the pressure sensor is arranged at the front end of the throttling element; the temperature sensor is arranged at the front end of the throttling element; a capacitance-type pressure difference capsule sensor is connected with the rear end of the throttling element; each parameter signal line is connected with a central processing unit; and the central processing unit is connected with the display. The invention can obviously eliminate the vortex phenomenon generated at both sides of the throttling element and is inimitable by other throttling elements. Moreover, the flowmeter has strong rot resistance and low purchasing cost and can realize bidirectional flow measurement. The high-intelligent meter integrating three elements of pressure, temperature and flow is powered by a lithium battery, does not generate pollution and realize bidirectional flow. The intelligent differential pressure balancing flowmeter has the precision up to 0.3 percent, reaches the world advanced level and fills the domestic blank.

The invention discloses an anti-eddy current inclined conveying type industrial material mixer and its working method, comprising a base, a mixing box, a material mixing unit, a material conveying unit and a material vibrating device; the mixing box is set in an inclined state supported by the base; The conveying unit corresponds to the material inclined conveying unit one by one, and the two form an L-shaped material conveying steering structure; the vibrating rod is located at the inner high end of the mixing box; the material rotating stirring part of the material mixing unit rotates to stir the industrial materials in the mixing box, and the two Two L-shaped material conveying and steering structures transport the industrial materials located at the short end of the mixing tank to the high end of the mixing tank through L-shaped conveying tracks. The inner bottom of the box rolls down inclined. The invention can prevent the vortex phenomenon from occurring in the stirring process of the industrial materials, and ensure the thoroughness and uniformity of the stirring of the industrial materials.

The invention discloses a flue gas desulfurization absorption tower with a twin-stage air flow distribution device. The flue gas desulfurization absorption tower comprises a tower body, a slurry pondlocated at the bottom of the tower body and the twin-stage air flow distribution device, a spray pipe and a demister which are sequentially arranged at the position, above the slurry pond, in the tower body from bottom to top; the tower body is provided with an absorption tower inlet communicated with the slurry pond, and the top end of the tower body is provided with an absorption tower outlet. The flue gas desulfurization absorption tower achieves rectification and uniform distribution of smoke entering the tower through the twin-stage air flow distribution device, when the smoke passes through the twin-stage air flow distribution device, the air liquid generates the strong impact effect: in the falling process of absorption slurry drops, the drops are broken again by the smoke which isaccelerated to go up when the drops pass through the twin-stage air flow distribution device, a new mass transfer absorption surface is generated, which is amount to, a spray layer without a circulation pump is additionally arranged, thus the mass transferring efficiency and the absorption efficiency are increased, and the operation energy consumption is saved.

The invention provides a draught fan structure and an air-conditioner, and relates to the technical field of air-conditioners. The draught fan structure comprises a volute base and a volute cover. Thevolute base is detachably connected with the volute cover in the axis direction of the volute base, a first cavity is formed in the volute cover, a second cavity is formed in the volute base, and thefirst cavity and the second cavity are combined to form an air passage. Compared with the prior art, the draught fan structure adopts the first cavity with the specific value range of 1 / 2-8 / 9 and thesecond cavity with the specific value range of 1 / 9-1 / 2, size parameters of the volute base and the volute cover are reasonably allocated, the vortex wind phenomenon is avoided, the generated noise can be effectively reduced, the noise pollution is avoided, and the practicability is high.

The invention discloses a seawater distributor for an open rack vaporizer and a use method. The seawater distributor is arranged on the top of a plate type tube bundle of the open rack vaporizer, and comprises a water inlet tube (1), a seawater tank (2), a first-stage buffer housing (4), a second-stage buffer housing (5), a third-stage buffer housing (6), a buffer plate (7), a distribution plug board (8), an overflow plug board (10), a rectangular flow-through port (11) and a flow guide plate (13), wherein the seawater tank is divided into a buffer region (3), a distribution region (9) and an overflow region (12) by the overflow plug board and the distribution plug board; the buffer region is not communicated with the overflow region, so that a vortex phenomenon or larger fluctuation produced by seawater in the buffer region can be effectively avoided to guarantee that the seawater in the overflow region is in a stable state; thus, the seawater is uniformly and naturally overflown to the surface on the top of the plate type tube bundle of the open rack vaporizer to form a stable seawater liquid film by using the seawater fall in the distribution region and the overflow region and under the cambered guidance of the flow guide plate.

The invention discloses a low-energy air purification system. The low-energy air purification system comprises an intake filtering unit, an air return channel, a first blade wheel, an air return filtering unit and electrostatic dust collection devices, wherein a first flow equalization device is transversely arranged at the lower end of the intake filtering unit; the air return channel is arranged in the indoor side wall; the first blade wheel is transversely arranged between the intake filtering unit and the first flow equalization device, a center rotary shaft of the first blade wheel penetrates an indoor ceiling upwards and is connected with a drive mechanism, and a bottom channel is transversely arranged at the indoor bottom; an intake opening of the air return filtering unit communicates with the indoor bottom space, and an air outlet of the air return filtering unit communicates with the bottom channel; and the electrostatic dust collection devices are arranged in the portion, on the two sides of the air return filtering unit, of the bottom channel, an inlet of each electrostatic dust collection device communicates with the bottom channel, and an outlet of each electrostatic dust collection device communicates with the bottom of the air return channel. The low-energy air purification system solves the technical problem that energy consumption is too high by means of an existing air purification system.