542results about How to "Fast flow" patented technology

The invention relates to a gas recovery well downhole multistage gas flow self-adaption cyclone separation device which comprises a degassing structure and a deposition reinjection structure, the degassing structure comprises a first-stage gas-liquid separation module, and the first-stage gas-liquid separation module comprises a gas-liquid inlet outer pipe, an upper gas pipe, a gas return spiral flow channel, a vent pipe, an upper liquid gathering conical pipe and a gas return liquid conveying conical pipe; an upper air guide pipe is arranged on the upper portion of the air return spiral flow channel, an air return conical cavity is formed in the air return spiral flow channel, the upper air guide pipe is communicated with the air return conical cavity, a lower port of the air return conical cavity is in butt joint with an air return infusion conical pipe, and the upper air pipe penetrates out of the upper air guide pipe. An annular space between the vent pipe and the upper air pipe and an annular space between the upper air guide pipe and the upper air pipe form an upper air channel; the upper liquid gathering conical pipe surrounds the outside of the air returning and liquid conveying conical pipe; the deposition reinjection structure comprises a lower spiral flow channel, a lower liquid gathering conical pipe, an inverted cone and a centrifugal pump. The coalescence reinjection technology and the rotational flow technology are combined, the efficiency is high, and the service life is long.

The invention relates to the technical field of water conservancy surveying and mapping, in particular to a detection method and device for rapidly constructing an underwater terrain of a dike breach based on unmanned aerial vehicle carrying. Aiming at the defects of underwater terrain detection at the current dike breach, the method comprises the following steps of: acquiring water flow speeds, water flow depths, infrared spectrum images and visible light images of a plurality of point clouds by unmanned aerial vehicle carried equipment; processing the water flow depth according to a related algorithm, and processing the infrared spectrum image by using an image processing algorithm to obtain a breach obstacle map; and processing the visible light image by adopting an image processing algorithm to obtain the edge information of the breach, and finally generating a three-dimensional terrain model of the breach in the same coordinate system according to the edge information of the breach, the corrected water flow depth and the breach obstacle map. According to the method, the underwater terrain at the dike breach can be rapidly, accurately and safely detected, and the method is of great significance in improving the plugging engineering efficiency, optimizing the plugging scheme and ensuring the safety and effectiveness of plugging work.

The invention relates to the technical field of forging, in particular to an air suspension aluminum cylinder assembly forging process which comprises the steps that a pre-forging blank is placed in a forging die and pre-forged, a forging face is divided into a plurality of annular areas, and point cloud data of a plurality of points in each annular area in the pre-forging process are obtained in real time; stopping pre-forging and pressing based on the change condition of the characteristic coordinate values, screening a raised characterization area, judging whether the shape change of the pre-forging blank is abnormal or not, forging the pre-forging blank with the abnormal shape change in a forging compensation manner to obtain a forging part, annealing the forging part to obtain an aluminum cylinder forging part, and further, performing pre-forging and pressing on the aluminum cylinder forging part to obtain the aluminum cylinder forging part. The forming shape stability of the special-shaped forged piece is analyzed according to the local deformation state of the material in the forging process, the forging mode is adaptively adjusted according to the material state difference, and the shape and size precision and the performance consistency of the special-shaped aluminum cylinder forged piece of the air suspension are improved.

The invention relates to a gas well downhole jet enhanced multistage gas-liquid efficient separation device, which comprises a gas-liquid separation structure and a gas-liquid diversion structure, the gas-liquid separation structure comprises a lower outer pipe and an inner pipe, the lower outer pipe and the inner pipe are coaxially arranged, the upper end of the lower outer pipe and the lower end of the inner pipe are both provided with a liquid inlet, and the lower end of the inner pipe is provided with a liquid outlet. A first-stage spiral flow channel, a drainage inverted cone, a second-stage spiral flow channel and a drainage taper pipe are arranged in the inner pipe; the gas-liquid flow dividing structure comprises an upper outer pipe, a pump outer pipe, a fixing ring, a bypass flow channel and a bridge type channel, the upper outer pipe and the pump outer pipe are coaxially arranged, the upper end of the bridge type channel is connected with the upper outer pipe, the bypass flow channel is arranged below the bridge type channel and extends into an inner sleeve of the fixing ring, and an annular space between the bypass flow channel and the inner sleeve of the fixing ring is a flow guide cavity and is gradually shrunk. And the flow guide cavity is an annular gap between the bypass flow channel and the upper port of the fixed ring inner sleeve. Separated gas and liquid are separately discharged, a gas phase is ejected and discharged under the action of underground pressure, a liquid phase is pumped out, and the gas phase is not in contact with a pump body.

The invention relates to the field of coal gasification chilled water, in particular to a coal gasification chilled water filtering system which comprises at least two filter bodies connected into a coal gasification chilled water system and arranged in parallel, and each filter body comprises a shell, a V-shaped sieve plate, a sieve plate flushing assembly and a shell flushing assembly. According to the coal gasification chilled water filtering system, on-line automatic dual cleaning of the filter body can be achieved, under the condition that normal operation of the filtering system is not affected, high-pressure grey water of a coal gasification grey water system is used for cleaning the sieve plate from the upper portion through the top flushing spray head, the inner wall of the shell is flushed through the combination of the side flushing pipe, and the filtering effect is good. The flushing effect of the filter body is improved, the service life of the filter body is prolonged, recycling of the filter body is achieved, the problems that at present, ash blocks the filter, chilled water supply is insufficient, and a gasification furnace cannot operate for a long period are solved, the working intensity of workers is reduced, and the production investment cost is saved.

The invention relates to a fin and a heat exchanger, and the fin comprises a base plate, the base plate is provided with a pipe hole used for allowing a refrigerant pipe to penetrate through, and the base plate is provided with a windward side in the airflow flowing direction; the windward plate is connected with the base plate and located on the windward side; wherein a slit is formed in the base plate, and the slit is located between the pipe hole and the windward plate. The windward plate is in contact with airflow preferentially, and the slits between the pipe holes and the windward plate can prevent low temperature at the refrigerant pipe from being transmitted to the windward plate area to a certain extent, so that relative high temperature of the windward plate area is formed, wet airflow does not immediately frost or cannot reach the frosting condition after being condensed on the windward plate, and more condensate water is generated. After the condensed water is collected and does not frost, the condensed water can flow from top to bottom along the windward plate under the action of gravity, the condensed water on the windward plate is fast in collection and flowing speed, and the condensed water is not prone to frosting after being left. The fin has the advantages of being high in overall condensate water discharge efficiency, not prone to frosting and high in heat exchange efficiency.

The technical scheme of the utility model discloses a multi-channel water-cooling radiator and a water-cooling radiating device with the multi-channel water-cooling radiator. The multi-channel water-cooling radiator is provided with more than two water pumps, a circulating water path communicating the water pump assembly and the water cooler body is formed in the radiator through a water drawing hole formed in the water guide assembly corresponding to the central projection position of the impeller and a water guide hole or a water guide gap formed outside a water drawing area of the water pump. The formed multi-channel radiator is simple in structure, relatively independent in fluid channel, smooth in path, small in water flow resistance, high in flow speed, capable of supporting rapid heat exchange between a cold water path and a hot water path and suitable for the situation that the flow of cooling liquid in the multi-channel water-cooling radiator is large. In addition, according to the water-cooling heat dissipation device, the connecting pipe is arranged between the water-cooling heat dissipation device and the water-cooling row, the optimized water-cooling heat dissipation device does not occupy the water-cooling row, and the heat transfer efficiency of the system can be improved.

The invention discloses a fish fry rearing device facilitating water changing and cleaning in the technical field of fish fry rearing, and the fish fry rearing device comprises a driving mechanism which is arranged at the bottom of an outer box assembly; the cleaning mechanism is arranged in an inner cavity of the inner box assembly and connected with the driving mechanism, the cleaning mechanism makes contact with the filter screen, and the driving mechanism drives the cleaning mechanism to rotate to clean the inner cavity of the inner box assembly and the filter screen. The cleaning mechanism is driven by the driving mechanism to rotate to carry out water changing cleaning on the interior of the inner box assembly, water changing cleaning can be carried out in the fry breeding process, fry does not need to be transferred, water changing cleaning can be conveniently and rapidly carried out while the labor intensity of breeding personnel is reduced, and the working efficiency is improved.

The invention discloses an air energy heat pump all-in-one machine and a using method thereof, and relates to the technical field of heat pumps. Comprising a machine body, an evaporator, an adjusting module and an airflow driving module, the adjusting module is installed on the outer side of the evaporator, and the airflow driving module is installed on the adjusting module; the method further comprises the following steps that S1, in the daily operation mode, air flow is enhanced; s2, switching to a dust removal mode in a specific period of time every day, and removing dust on the surface of the evaporator; s3, dust removal is conducted on the ventilation plate; s4, switching to a defrosting mode; and S5, the angle is automatically adjusted, and the evaporator is defrosted from bottom to top. In a daily operation mode, the air conditioner is cooperatively matched with the fan to enhance air flow and improve heat exchange efficiency, in a dust removal mode, the air duct can remove dust on the evaporator and the ventilation plate at regular time, in a defrosting mode, the air duct moves from bottom to top to defrost, the upper half part of the air duct preheats and melts a frost layer, and the defrosting effect is improved. And the lower half part evaporates and dries the defrosted water drops.

The invention relates to the technical field of mixing and stirring, in particular to a feeding, mixing and stirring device for plastic adhesive resin manufacturing, which comprises a stirring barrel, stirring blades, a stirring motor and a gas circulation assembly, the stirring barrel comprises a barrel body and a cover body, a gas outlet is formed in the cover body, the barrel body sequentially comprises an inner wall layer, a supporting layer and a heating layer from inside to outside, and a gap is formed between the inner wall layer and the supporting layer to form a gas space; a plurality of circular-truncated-cone-shaped air outlet through holes are formed in the inner wall layer; the gas circulation assembly comprises a gas pump communicated with the gas outlet hole and the gas space; gas circulation is achieved through the gas space between the inner wall layer and the supporting layer in cooperation with a gas pump, liquid resin attached to the inner wall of the barrel can be blown to expand, and the contact area with plastic particles is increased; the blown gas can form a gas film on the surface of the inner wall layer, and due to the existence of the gas film, the liquid resin is not easy to adhere to the surface of the inner wall layer, so that the mixing effect is further improved.

The invention relates to the technical field of hemodialysis, in particular to a hemodialysis filter and a filtering system.The hemodialysis filter comprises a tube body, end covers are detachably installed at the two ends of the tube body, and a liquid inlet and a liquid outlet which are communicated with the interior of the tube body are formed in the two ends of the tube body; the filter element is coaxial with a concentric structure arranged between the pipe body and the end cover; the one-way valve body is mounted on the liquid inlet; the compression pipe fitting and the plugging structure are communicated with the liquid outlet, and the compression pipe fitting and the plugging structure are linked, so that when the compression pipe fitting acts, the plugging structure can plug the liquid outlet; the storage assembly is connected with the pipe body and the compression pipe fitting, the storage assembly has two states of being combined with and separated from the compression pipe fitting, and when the storage assembly is separated from the compression pipe fitting, the compression pipe fitting can enable blood in the liquid outlet to flow back, and the situation that the filtering effect is reduced due to the fact that the filter element is blocked is avoided.

The invention relates to the technical field of cooling devices, and discloses a cooling device for iron casting production, which comprises a base, the top of the base is fixedly connected with a support frame, the inner wall of the support frame is provided with a fan assembly, the rear part of the base is fixedly communicated with a water inlet pipe, and the front part of the base is fixedly communicated with a water outlet pipe. After air cooling, the lifting frame is driven by the air cylinder to move so that an iron casting can be subjected to water cooling, manual contact is avoided, the service life of the equipment is prolonged, meanwhile, the cooling speed of the iron casting is further increased, the quality of produced cast iron is better, and before water cooling, the cooling efficiency is improved. The lifting frame moves to drive the pressing plate to move to clamp the iron casting, the position of the iron casting in water flow is prevented from being changed, cooling of the iron casting is more stable, the overall working efficiency of equipment is improved, and the overall quality of products is further improved.

The utility model discloses an airflow simulation device which comprises a device box with an opening in the upper end, a sealing cover hinged to one side of the opening end of the device box, a first fan installed at the front end of the outer wall of the device box, an air guide pipe communicated with the rear end of the outer wall of the device box, and a second fan installed at the rear end of the air guide pipe. An air inlet box with an opening in the upper end is arranged behind the second fan, a box cover is hinged to one side of the opening end of the air inlet box, a connecting hole is inwards formed in the front end of the outer wall of the air inlet box, an air inlet of the second fan communicates with the connecting hole, and a rectifying grating is detachably connected between the left side and the right side of the front end of the inner wall of the air inlet box in a matched mode; a control panel is arranged on one side of the outer wall of the air inlet box, a controller and a frequency converter are installed in the control panel, and a power line electrically connected with the controller is arranged on one side of the bottom of the outer wall of the controller. The device is small in occupied area, stable to mount and dismount, and capable of ensuring the stability of airflow during an experiment and improving the accuracy of an experiment result.

The utility model discloses an anti-silt corrugated pipe, and belongs to the technical field of pipelines. The pipe comprises a connector part and a pipe body part which are connected together, the pipe body part comprises a pipe wall, the inner wall of the pipe wall comprises a first inner side wall and a fourth inner side wall which are oppositely arranged, and the first inner side wall and the fourth inner side wall are obliquely arranged relative to the vertical line of the ground; the lower ends of the first inner side wall and the fourth inner side wall are close to each other. The two side walls of the corrugated pipe are inclined relative to the vertical line of the ground, the lower ends of the two side walls are close to each other, and a closing-up structure is formed at the bottom of the corrugated pipe, so that on one hand, dirt falls down under the action of gravity and is difficult to stay on the side walls, and on the other hand, sewage can flow faster in the pipeline by increasing the flow speed; and dirt is prevented from being accumulated at the bottom of the pipeline, and some originally accumulated dirt can be washed away, so that accumulation of dirt on the wall of the pipeline and sludge at the bottom of the pipeline is avoided, and the possibility of pipeline blockage is reduced.

The utility model relates to a dust removal and denitration integrated device for a cement kiln. The dust removal and denitration integrated device comprises an integrated bin, and a rectifying device, a dust removal area and a denitration area which are arranged in the integrated bin, the integrated bin extends in the vertical direction and is sequentially provided with a flue gas outlet, a flue gas inlet and an ash discharging opening from top to bottom, and the rectifying device is close to the flue gas inlet. The dust removal area is arranged above the dust discharge port and provided with a dust collection electrode and a corona electrode, the dust collection electrode comprises an anode frame and an anode plate, and the anode plate is in a long-strip-shaped plate shape and can shake under the action of airflow to conduct self-dust removal. The corona electrode comprises a cathode frame and a cathode wire. The denitration area is arranged above the dust removal area, the denitration area is provided with a plurality of catalyst layers and an ash removal device, the catalyst layers are arranged up and down at intervals, and the ash removal device is used for removing ash on the bottom surface of a denitration catalyst. The dust removal and denitration functions of flue gas are integrated in the integrated bin, the needed occupied area is small, the dust removal area and the denitration area do not need to be connected through an elbow, the internal flow field is smoother, and the system operation resistance is smaller.

The invention relates to the field of essence preparation, and discloses a fruit-flavored daily chemical essence preparation device which comprises a rack, and a feeding mechanism, a stirring mechanism and an output pipeline are mounted on the rack. The stirring mechanism comprises a lifting assembly and a rotating support rotationally connected with the lifting assembly, a rotating shaft formed at the joint is driven by a first motor to rotate, the lifting assembly can pull the rotating support to move in the vertical direction, the first motor is arranged on the lifting assembly, and the rotating shaft is horizontally arranged; the two ends of the rotating support are each perpendicularly provided with a cantilever support, a mixing tank is installed between the two cantilever supports, and the axis of the mixing tank is perpendicular to the axis of the rotating shaft. The stirring mechanism further comprises a stirring assembly located in the mixing tank and a driving assembly located outside the mixing tank and used for driving the stirring assembly to move and rotate in the mixing tank at the same time.

The utility model discloses a regeneration tower capable of fully desulfurizing pregnant solution, which comprises a regeneration tower body, a pregnant solution inlet pipe mounted at the upper end of the regeneration tower body, a barren solution outlet pipe mounted at the lower end of the regeneration tower body, an exhaust pipe mounted on the regeneration tower body, and an air inlet mechanism mounted on the regeneration tower body. A spraying mechanism is mounted on the regeneration tower body; the air inlet mechanism comprises an exhaust fan, an air inlet pipe and a steam outlet pipe; the spraying mechanism comprises a rolling bearing, a liquid spraying pipe, a spraying head and a driving frame. The regeneration tower has the beneficial effects that rich liquid is sprayed outwards through the spray heads, so that the volume of the rich liquid can be diffused, the contact area of the rich liquid and steam can be further increased, the steam is extracted into the regeneration tower body through the exhaust fan, the flowing speed of the steam can be accelerated, the falling speed of the rich liquid can be delayed, and the regeneration effect of the rich liquid is improved. Furthermore, rich liquid can be sufficiently desulfurized through steam, the height of the regeneration tower can be reduced, and the manufacturing cost of the regeneration tower is reduced.

The utility model relates to the technical field of heat dissipation devices, and discloses a liquid cooling heat dissipation device and a liquid cooling heat dissipation system comprising the liquid cooling heat dissipation device. The utility model discloses a liquid cooling heat dissipation device, and the device comprises a housing. A liquid inlet and a liquid outlet are formed in the shell, and a cavity communicated with the liquid inlet and the liquid outlet is formed in the inner side of the shell; at least one flow guide plate is arranged in the cavity and corresponds to the inner wall of the cavity in position, so that a roundabout flow channel is formed in the cavity, and the two ends of the flow channel are communicated with the liquid inlet and the liquid outlet respectively; the liquid cooling heat dissipation device further comprises a flow guide adjusting structure, the flow guide adjusting structure is connected with the flow guide plates and the shell, and the flow guide adjusting structure is used for adjusting the distance a between the flow guide plates and the corresponding inner wall of the cavity and / or the distance b between the adjacent flow guide plates so as to adjust the width of at least part of the flow channels. The heating device has the beneficial effects that the heat dissipation efficiency is improved, and the service life of the heating device is prolonged.

The invention discloses an intelligent monitoring system of electrical equipment, and relates to the technical field of electrical detection. According to the invention, through the fan blades and the conductive layer arranged in the air inlet pipe, real-time detection of the load current in the equipment can be realized by rotating the fan blades to cut a magnetic field. Meanwhile, the fan blades are matched with the first conducting layer and the second conducting layer, so that current can be effectively detected while air flow is maintained, and dual functions are achieved; a flow dividing channel and a separation chamber are arranged in the air inlet system, and through the exquisite design of an air suction nozzle and a separation pipe, air entering the equipment can be effectively filtered before entering the equipment. Dust and particulate matters in the air are separated and collected into the dust collecting groove under the action of centrifugal force, so that part of impurities entering the equipment are reduced, and the durability and the reliability of the equipment are further improved.

The utility model provides a heat dissipation shell of an LED lamp, and relates to the field of LED lamps. The LED lamp heat dissipation shell comprises a fixing plate, a shell mechanism is arranged on the surface of the fixing plate, the shell mechanism comprises a mounting plate and a connecting plate, a heat dissipation mechanism is arranged in the middle of the connecting plate, the heat dissipation mechanism comprises heat dissipation fan blades, a heat dissipation plate and a filter plate, and a sweeping mechanism is arranged on the surface of a fixing bin. The cleaning mechanism comprises a rotating shaft and bristles. According to the heat dissipation shell of the LED lamp, the lamp is installed on a wall through the installation plate, air inside the fixing bin and air outside the fixing bin are made to flow through the heat dissipation fan blades, the heat dissipation efficiency of the LED lamp is improved, circulating air is filtered through the filter plate, the LED lamp is subjected to heat dissipation and cooling through the heat dissipation plate and heat dissipation fins, the heat dissipation efficiency of the LED lamp is improved, and the heat dissipation efficiency of the LED lamp is improved. Bristles are driven to rotate through a rotating shaft to clean the filter plate, so that the filter plate is prevented from being blocked by dust, and the air filtering effect of the filter plate is improved.

The present invention relates to the technical field of tire production, and discloses a tire manufacturing vulcanizing machine center mechanism, which comprises a center mechanism main body, and further comprises a cooling assembly assembled on the center mechanism main body, and the cooling assembly comprises a water cavity formed in the center mechanism main body for cooling water to flow, a water inlet pipe communicated with the water cavity is fixedly mounted on the central mechanism main body; comprising a central mechanism body and further comprises a cooling assembly assembled on the central mechanism body, the cooling assembly comprises a water cavity formed in the central mechanism body and used for cooling water to flow, a water inlet pipe communicated with the water cavity is fixedly installed on the central mechanism body, and a water pump is arranged on the water inlet pipe; a water outlet pipe communicated with the water cavity is fixedly installed on the center mechanism body, and a spiral flow guide plate used for prolonging the residence time of cooling water is fixedly installed in the water cavity.

The present application relates to the technical field of plunger pump, in particular to a variable stroke double cavity plunger pump, which comprises a shell and a driving motor, two delivery pipes are arranged in the shell, two groups of crankshaft assemblies are arranged on the output shaft of the driving motor, the shell is connected with the corresponding delivery pipe through the crankshaft assembly, and a first one-way valve and a second one-way valve are symmetrically arranged in the delivery pipe along the axis of the crankshaft assembly; the one-way valve comprises a reset assembly, a sealing assembly and a clamping assembly arranged in sequence from top to bottom, the sealing of the sealing assembly is realized by the elastic extension of the reset assembly and the adhesion of the clamping assembly; the sealing assembly on the first one-way valve is provided with a first negative pressure assembly, the sealing assembly on the second one-way valve is provided with a second negative pressure assembly, and the first negative pressure assembly and the second negative pressure assembly are oppositely arranged; by arranging the negative pressure disc and the connecting pipe, the stress area of the sealing ball under the negative pressure condition is increased, the opening speed is accelerated, and the fluid passing efficiency is improved.

The invention discloses a pouring device for castings. The product quality is improved. Comprising a tundish and a tundish shell, the bottom of the tundish shell is provided with a discharging installation hole, a turning plate installation supporting lug and a plurality of adjusting screw holes, the turning plate installation supporting lug is hinged to a turning plate, and a ceramic sealing plate is fixed to the turning plate; the tundish is provided with a discharging pipe opening, the discharging pipe opening penetrates through the discharging mounting hole, the end face of the discharging pipe opening is a sealed plane, the tundish is provided with a spherical surface, the number of the adjusting screw holes in the tundish shell is multiple, an adjusting bolt is arranged in each adjusting screw hole in a matched mode, and the end of each adjusting bolt makes contact with the spherical surface; a pressing stud is arranged on the tundish shell in the vertical direction, a supporting block is connected to the top of the pressing stud, a pressing adjusting bolt is arranged on the supporting block, and the tundish is fixed through the pressing adjusting bolt. The free end of the turning plate is hinged to one end of a driven rod, the other end of the driven rod is hinged to one end of a swing rod, and the other end of the swing rod is connected to a driving mechanism.

The utility model relates to the technical field of torrent grooves, and discloses a water conservancy torrent groove structure which comprises a groove body, the groove body is in a Y shape, fixing assemblies are arranged at the two ends of the groove body, each fixing assembly comprises a cylindrical pipe, a rotary knob and a cylindrical block, the cylindrical pipe is hollow, a pushing unit is arranged in a cavity of the cylindrical pipe, and the rotary knob is arranged on the cylindrical block. The pushing unit comprises a threaded rod, a lifting plate and a connecting rod, the threaded rod movably penetrates through the lifting plate, and an acceleration unit is arranged in a cavity of the groove body. The accelerating units are arranged in the cavity of the tank body, the outlet is narrowed, so that the flow velocity is increased, the two accelerating units are arranged in a staggered and symmetrical state, water flow is accelerated step by step, and the flow guide effect of the torrent tank is better; and a worker inserts the cone and the cylindrical block into the ground by rotating the rotary knob, so that the groove body is quickly mounted and reinforced, the disassembly is more convenient, and the practicability of the device is improved through the reasonable structural design.

The utility model discloses a solid-liquid separation device for wastewater treatment, which comprises a separation box, an acceleration settling box, a motor, a rotating shaft, a feeding pipe, a stirring rod, a discharging pipe, a first sieve plate and a second sieve plate, the motor is arranged on the upper side of the separation box, the feeding pipe is arranged on the separation box close to the motor, the rotating shaft is arranged at the shaft end of the motor, and the stirring rod is arranged on the rotating shaft. A rotating shaft is arranged in the separation box, the rotating shaft extends into the separation box, an accelerated precipitation box is arranged at the position, corresponding to the rotating shaft, in the separation box, the size of the accelerated precipitation box is matched with the size of the separation box, a plurality of stirring rods are arranged on the rotating shaft and distributed at equal intervals, and a discharging pipe is arranged on the lower side of the accelerated precipitation box. A first sieve plate is arranged at the position, close to the accelerated settling box, in the separation box, and a plurality of filter holes are formed in the first sieve plate. The sieve plate cleaning device is simple in structure, can automatically clean when the sieve plate is blocked, and reduces a large amount of manual cleaning workload.

The invention relates to the technical field of rocket engine high-altitude simulation tests, and discloses a diffuser thermal protection design method, which comprises the following steps: determining a gas supersonic flow and gas subsonic flow switching position in a diffuser; the interior of the diffuser is divided into a fuel gas supersonic speed section, a fuel gas subsonic speed straight barrel section and a fuel gas subsonic speed expansion section; a cooling liquid jacket is arranged around the diffuser; the cooling liquid jackets corresponding to the fuel gas supersonic velocity section, the fuel gas subsonic velocity straight barrel section and the fuel gas subsonic velocity expansion section are respectively an A-section cooling liquid jacket, a B-section cooling liquid jacket and a C-section cooling liquid jacket; the diameter of the outer wall of the A-section cooling liquid jacket is larger than that of the outer wall of the B-section cooling liquid jacket. The cooling liquid jackets with different thicknesses surround the fuel gas supersonic speed section and the fuel gas subsonic speed straight barrel section respectively, so that the flowing speed and the heat exchange coefficient of the cooling liquid are increased, heat is transmitted out more quickly, the temperature of the fuel gas subsonic speed straight barrel section is prevented from rising quickly, and then the diffuser obtains more reliable thermal protection.

The utility model relates to a ventilation system, and provides a ventilation system for tunnel construction, which comprises a ventilation pipe, an air blower arranged at the end part of the ventilation pipe, a plurality of exhaust holes formed in the side wall of the ventilation pipe, an exhaust pipe fixedly arranged at the exhaust holes, a sleeve connected with the exhaust pipe and provided with a closed upper end, and a through hole formed in the upper end wall of the sleeve, the connecting rod is arranged at the upper end of the sleeve, and the baffle is connected with the connecting rod in a sliding mode. The multiple exhaust holes are distributed in the length direction of the ventilation pipe. According to the ventilation system for tunnel construction, ventilation can be evenly and fully carried out on all positions in a tunnel.

The utility model discloses a fan-shaped ball tooth drill bit with a main nozzle and an auxiliary nozzle, which comprises a drill bit body and a matrix, the drill bit body is fixedly connected with the matrix, the diameter of the matrix is larger than that of the drill bit body, the side wall of the matrix is provided with the main nozzle and the auxiliary nozzle, and the auxiliary nozzle is formed by integrally connecting three sections of curved surfaces. Through the design, the three sections of curved surfaces of the auxiliary water gap increase the flowing area of cooling liquid when the cooling liquid passes through the auxiliary water gap, and compared with most right-angle auxiliary water gaps, the auxiliary water gap structure has the advantages that the resistance to the flowing cooling liquid is smaller, the flowing speed of the cooling liquid is slightly high, and the flow of the cooling liquid passing through the auxiliary water gap in unit time is increased; and the heat dissipation effect of the drill bit is enhanced.

The invention discloses a preparation method and device of a hair follicle-like composite microstructure. According to the method, by means of the thermal deformation performance of the memory alloy material, the electrode deformation section made of the memory alloy material goes deep into the pit formed in the surface of the cutter through laser machining, the deformation section is heated to be in a circular arc shape, and an electrochemical etching method is adopted; an electrochemical system formed by an electrode, a cutter, a power supply device and electrolyte in the pit is used for enabling the rotating electrode to etch the pit into hair follicle structures, then flocking glue doped with magnetic particles is injected into the hair follicle structures, fiber bundles are implanted into the hair follicle structures, and then the hair follicle structures are formed. And after flocking is completed, the magnetic particles in the hair follicle structures are magnetized, and then the work of preparing the hair follicle-imitating composite microstructure on the surface of the tool is completed. According to the prepared cutter surface hair follicle-imitating composite microstructure, the cutter can achieve the continuous wetting effect in the working process, the good wetting performance is achieved, and then the cutting performance of the cutter is improved.