40 results about "Snail shell" patented technology

The invention discloses a volute solid-liquid separation clarification device which comprises a bottom shell and a volute plate, the bottom end of the volute plate is fixedly connected with the bottom shell, the bottom shell is conical, the bottom end of the volute plate is attached to the inner wall of the bottom shell, and the outer end of the volute plate and the bottom shell are jointly connected with a baffle. A spiral / volute-line-shaped / vortex-line-shaped flow channel is formed in the vortex-shaped plate, a water outlet of the spiral flow channel is formed above the baffle, mixed liquid needing solid-liquid separation flows from the inner ring end of the vortex-shaped plate to the water outlet along the spiral flow channel, and a plurality of discharging openings are formed in the bottom of the bottom shell in a penetrating mode. A plurality of discharge pipes communicated with the discharge ports are fixedly mounted at the bottom of the bottom shell; by arranging the bottom shell, the vortex-shaped plate, the baffle, the multiple discharging openings and the like, the advantages of three solid-liquid separation modes of horizontal flow precipitation, vertical flow precipitation and centrifugal separation are integrated, the sizes of D1 and D2 can be designed in a targeted mode according to the characteristics of materials needing to be separated, the precipitation position is controlled, and small occupied space and classified separation of the materials are achieved.

The utility model discloses an air supply device and a gas water heater, the air supply device comprises a first shell and a second shell, the first shell is provided with an air inlet duct, a volute air duct communicated with the air inlet duct and an air outlet duct communicated with the volute air duct are constructed between the first shell and the second shell, and in the radial outward direction of the volute air duct, the air outlet duct inclines in the direction deviating from the air inlet duct. According to the air supply device provided by the embodiment of the utility model, the first shell and the second shell are connected to form the air supply device, so that the structure of the air supply device can be simplified, and the processing cost is reduced.

The invention discloses a fan assembly and a water heater, and relates to the technical field of household appliances, the fan assembly comprises a volute and a wind wheel, the volute comprises a volute tongue, a first end wall, a second end wall and a circumferential side wall, the first end wall and the second end wall are arranged at the two opposite ends of the circumferential side wall in the axial direction, the first end wall is provided with an air inlet, and the second end wall is provided with an air outlet; the volute tongue is connected with one end of the circumferential side wall, the wind wheel is arranged in the volute, a connecting line from the center of the wind wheel to the connecting position of the volute tongue and the circumferential side wall serves as a reference line, an included angle between a ray from the center of the wind wheel to the circumferential contour of the wind wheel and the reference line serves as a reference included angle, and the included angle ranges from 75 degrees to 270 degrees. The ratio of the length of the circumferential side wall to the center of the wind wheel to the radius of the wind wheel is gradually increased and does not exceed 1.8. According to the volute, the size of the circumferential side wall of the volute is reasonably set by associating the size relation between the length of the circumferential side wall and the center of the wind wheel and the radius of the wind wheel, and occupied space is reduced.

The utility model discloses a volute structure, a fan system with the volute structure and an integrated cooker, the volute structure comprises a volute coaming, a first side plate and a second side plate, and the volute coaming is fixedly arranged between the first side plate and the second side plate; the volute coaming comprises a volute tongue section, the first side plate and the second side plate are of an asymmetric structure at the volute tongue section, and the molded line of the volute tongue section is a wing-shaped molded line; the volute tongue section comprises a first arc surface section, a first curved surface section and a second curved surface section, one end of the first arc surface section is connected with one end of the first curved surface section, the other end of the first arc surface section is connected with one end of the second curved surface section, and the first curved surface section and the second curved surface section are oppositely arranged. According to the embodiment of the utility model, the impact of airflow on the volute tongue can be effectively relieved, the flow separation of air near the volute tongue is reduced, and the noise of a fan system is effectively reduced under the condition that the impeller and the rotating speed are not changed.

The invention relates to the technical field of aquaculture application, in particular to an artificial compound feed for breeding whitmania pigra, which comprises a compound feed and a snail shell, the empty snail shell is filled with the compound feed, the snail shell is used as a carrier of the compound feed to simulate real live snail contents, and the artificial compound feed can be used for breeding whitmania pigra. On the premise of not changing the ingestion habit of the whitmania pigra, ingestion of the whitmania pigra to the artificial compound feed can be promoted, the problem that the artificial compound feed is not accepted by the whitmania pigra is finally solved, then replacement of fresh and live snail baits by the artificial compound feed is achieved, dependence on natural baits can be reduced by using the artificial compound feed, and the survival rate of the whitmania pigra is increased. The risk of food shortage caused by seasonal changes or environmental factors is reduced, in addition, the preparation and feeding process of the artificial compound feed is more controllable, large-scale breeding management is facilitated, and therefore the breeding efficiency and economic benefits are improved.

The invention belongs to the technical field of anti-impact protection. According to the snail shell imitating square tube improved anti-impact energy absorption structure and the application, the structural monomers or the structural modular array can be used for dynamic load protection. Under the action of an axial compression load, the structure realizes a multi-layer and progressive collapse path, and has low initial peak crushing force and staged and approximately linear increasing force-displacement response characteristics. According to the bionic structure, the energy absorption efficiency of the rectangular pipe is effectively improved under the condition that the mass and the manufacturing complexity are not increased, and the bionic structure is suitable for vehicle anti-collision systems, rail transit buffer devices and other anti-impact protection fields.

The present invention relates to a process for preparation of dual functional materials (DFMs) that exhibit both catalytic activity and CO2 sorption capacity, specifically designed for blue H2 production via sorption-enhanced steam methane reforming. Process for preparation of dual functional materials (DFMs) consisting the CO2 sorbent, calcium oxide (CaO) derived from biowaste resources, including snail shells, seashells, or eggshells, while nickel (Ni), derived from nickel nitrate hexahydrate, serves as the catalyst. The dual functional materials (DFMs) are prepared by combining the catalyst and sorbent through various methods, including wet mixing (WM), wet impregnation (WI), and the sol-gel (SG) method. Comparative studies demonstrated that the combined sorbent-catalyst composition (CSCC) synthesized through WI exhibits superior performance in terms of both CH4 conversion and H2 purity compared to those derived through WM and SG methods.

The utility model provides a compressor volute structure with a cooling flow channel, which comprises a volute main body and a volute wall thickness connected to the inner side of the volute main body, and a volute airflow channel communicated with the volute wall thickness is arranged in the volute main body. Cooling channels which are communicated with each other and used for flowing of cooling media are arranged in the wall of the volute wall thickness and the wall of the volute body, a first medium opening communicated with one end of each cooling channel is formed in the outer wall of the volute body, and a second medium opening communicated with the other end of each cooling channel is formed in the outer wall of the outlet end of the volute wall thickness. According to the utility model, a compressed air medium can be effectively cooled, the heat exchange capacity and the heat exchange area when the compressed air medium enters cooling equipment are reduced, and the compression efficiency and the cooling efficiency are improved.

The utility model relates to the technical field of range hoods, in particular to a self-cleaning range hood. The self-cleaning range hood comprises a volute, a sealing assembly and a liquid inlet pipe, the volute is provided with a cavity, an impeller capable of rotating is installed in the cavity, and a first liquid outlet is formed in the bottom of the volute; the sealing assembly comprises a rotating rod and a first sealing plug, the rotating rod is connected with the first sealing plug, and the rotating rod is rotationally connected with the bottom of the volute; one end of the liquid inlet pipe extends into a cavity in the volute, and liquid can be introduced into the cavity; and the sealing assembly is configured to rotate in response to liquid introduced into the liquid inlet pipe, so that the first sealing plug moves towards the first liquid outlet to block the first liquid outlet. The self-cleaning range hood has the advantages that the liquid inlet pipe can introduce liquid into the cavity and can also drive the sealing assembly to move, so that a mechanism for driving the sealing assembly to move does not need to be additionally arranged, the self-cleaning range hood is simpler in structure, more stable in operation and durable in use, and the processing and material cost is reduced.

The invention relates to the technical field of energy storage generator set hoisting, in particular to a pumped storage pump turbine seat ring volute hoisting device which comprises a mounting block, and a steel wire rope is connected to one side of the bottom end of the mounting block in an equal-angle surrounding mode. When the lifting device for the seat ring volute of the pumped storage water pump turbine is used, an operator only needs to place a plurality of limiting covers on the surface of the volute in a clamping mode, then a motor is remotely controlled to drive wheels to walk so that positioning bolts in the limiting covers can be rotated to the positions above screw holes in different positions of the surface of the volute, and then the volute can be lifted. Then through cooperative operation of a stepping motor, a first gear, a second gear and a hydraulic telescopic cylinder, a positioning bolt can be automatically drilled into a screw hole, positioning is completed, and the hoisting assembly efficiency is improved; and the motor driving wheel is controlled to drive the multiple limiting covers to move and reset to the same position of the surface of the volute, then the multiple limiting covers are rapidly separated from the volute, and the overall operation is convenient and fast.

The present invention discloses a volute of a centrifugal fan, a centrifugal fan and an air conditioner, wherein the volute is formed with a first air inlet, a second air inlet, an air outlet and a centrifugal air duct, the centrifugal air duct connects the first air inlet, the second air inlet and the air outlet, the first air inlet and the second air inlet are arranged oppositely at two ends of the volute in the axial direction, the centrifugal air duct is used to accommodate a centrifugal fan wheel, and the volute is provided with a side of the first air inlet for installing a motor, wherein the air inlet area of ​​the first air inlet is larger than that of the second air inlet. In this embodiment, by increasing the area of ​​the first air inlet on the side of the volute provided with the motor, the adverse effect of installing the motor on one air inlet side of the centrifugal fan is reduced, so that the air inlet on the two air inlet sides of the centrifugal fan is more balanced, so that the centrifugal fan can still run smoothly at high speed and reduce wind noise.

The utility model discloses an impeller mounting structure, which comprises a volute (1), an impeller (2) and a locking assembly (3), and is characterized in that the locking assembly (3) comprises a fixed seat (31) which is a magnetic conductive piece, and the impeller (2) is sleeved on the periphery of the fixed seat (31) through a bearing (21); the lower part of the limiting cylinder (32) is accommodated in the mounting hole (311) of the fixed seat (31), the periphery of the limiting cylinder (32) is provided with a limiting flange (321) for limiting an inner ring of the bearing (21), and a first magnet (322), a second magnet (323) positioned above the first magnet (322) and two magnetic conductive blocks (324) which are respectively arranged close to an N pole and an S pole of the first magnet (322) are arranged in the limiting cylinder (32); and the rotating rod (33) is used for driving the second magnet (323) to rotate relative to the first magnet (322). The utility model further discloses a range hood applying the impeller mounting structure.

The invention discloses a fire pump for improving the small flow hump phenomenon, which comprises a volute, an impeller, and a rotating shaft. The volute comprises a front side wall, an inlet pipe, and a pressure water chamber. The impeller comprises a front cover plate, a rear cover plate, blades, and an inlet ring. The invention is characterized in that an adjustment ring is arranged on the outer circumference of the inlet ring, and the adjustment ring is rotatably arranged relative to the inlet ring. The adjustment ring comprises a ring body, a first guide blade, and a first connecting hole. The outer circumference of the ring body is arranged with a first guide blade, and a plurality of first guide blades are evenly distributed along the circumferential direction. The left end face of the inlet ring is connected with an end cover ring through a connecting piece. A second connecting hole is provided on the inlet ring, and the second connecting hole is arranged on the right side of the adjusting ring. The invention can improve the regulating effect of the unsteady flow and pressure pulsation at the inlet of the fire pump, can reduce the cavitation performance and the inlet secondary flow, thereby improving or eliminating the small flow hump phenomenon, and improving the hydraulic performance and operation stability of the fire pump.

The utility model relates to the technical field of hydroelectric power generation, and provides a hydroelectric power generation device which comprises a spiral volute and a base plate, the top end of the base plate is fixedly connected with a fixing block, the outer side of the fixing block is rotationally connected with a rotating arm, the outer side of the rotating arm is rotationally connected with a rotating rod, and the outer side of the rotating rod is fixedly and rotationally connected with a rotating disc. A fixing frame is fixedly connected to the outer side of the rotary disc, a scraper blade is fixedly connected to the outer side of the fixing frame, a sleeve is fixedly connected to the top end of the base plate, a cavity is formed in the sleeve, a piston is slidably connected to the interior of the cavity of the sleeve, and the base plate abuts against an inner arm of the spiral volute. The hydroelectric power generation device solves the problems that when a hydroelectric power generation device in the prior art is used, firstly, no emission reduction device is arranged in the device, a rotating shaft is impacted by water flow for a long time, deviation, rotating speed reduction and power generation capacity reduction are easily caused, and secondly, no adjusting switch is arranged in the device, the water flow cannot be adjusted, and the power generation capacity of the device is inconvenient to improve.

The hoisting type cutting device comprises an operation platform located at the top of the volute seat ring, the periphery of the operation platform is fixedly connected with an external machine base, and a plurality of positioning mechanisms are annularly distributed on the periphery of the bottom of the operation platform; a measuring mechanism for horizontally positioning the cutting device is arranged on the inner side of the positioning mechanism; the positioning mechanism comprises a mounting frame fixedly connected to the bottom of the operation platform, a positioning frame is connected to the mounting frame through a lead screw transmission structure, the end of the positioning frame extends to the outer side of the mounting frame and is connected with a limiting block, and the limiting block is used for limiting the cutting device. The mounting difficulty of the cutting device can be reduced, and the positioning precision of the cutting device can be improved.

The invention discloses a high-quality snail mucus and an extraction method thereof, and the extraction method comprises the following steps: S1. Select healthy snails, place the snails in a clean place, and fast for 1-5 days; S2. After the fasting ends, feed the snails with feed, which is rich in polysaccharides and mucin; S3. Take out the snails that have been fed with feed for 1-5 days, disinfect and clean the surface, and use a mild bactericide for the cleaning liquid, and rinse with clean water after cleaning; S4. Knock open the snail shell, remove the snail shell and impurities, take out the snail meat and put it in a clean container; S5. Add the extract, stir evenly, let it stand, let the snail secrete more liquid, and filter out the snail secretion liquid. The snail mucus extracted by the extraction method of the present invention is of high quality and can maintain viscosity for a long time without being made into dry powder.

A centrifugal pump comprises a pump body, a volute and a driving impeller, the volute is arranged on the pump body, the driving impeller is arranged at the power output end of the pump body and located in the volute, and the centrifugal pump is characterized in that a rectification connector is arranged on one side of the pump body in the direction parallel to the central axis of the driving impeller, and the water inlet end of the rectification connector can receive water flow of a water outlet port of the volute; the water flowing direction of the rectification connector is perpendicular to the water outlet direction of the volute. The caliber of an inner cavity flow channel of the rectification connector is larger than that of a water outlet port of the volute. And when the water flow at the outlet of the water pump is disordered, the cavity expanding structure in the rectification joint can play a role in rectification to reduce water flow turbulence noise.

The utility model discloses an automatic mud cake unloading device for a sludge dewatering plate-and-frame filter press, which structurally comprises a filter plate arranged on a side beam of a rack, a mud unloader arranged on the side beam, the mud unloader comprises a moving seat, a guide beam is arranged on the side beam along the side beam, the moving seat is arranged on the guide beam in a sliding manner, the mud unloader further comprises a disturbance mechanism, and the disturbance mechanism is arranged on the guide beam. According to the utility model, the cam driven by the speed reducing motor is arranged in the sludge unloading device, and the cam is arranged to be in a spiral shape like a snail shell, so that the cam rotates to jack up the hanging lug and the filter plate in the process of pulling the filter plate; when the high part of the rotating cam moves into the notch from the bottom end of the hanging lug, the hanging lug loses the jacking of the cam and then falls down to impact the side beam, so that the filter plate vibrates, sludge with over-high viscosity or over-low solid content can be better separated from the filter plate under the vibration after being dehydrated, more vibration can be realized by setting the number of turns of rotation, and the sludge can be effectively separated from the filter plate. And the separation effect is better.

The application discloses a high-strength and high-toughness fiber reinforced composite material based on biological structure combined bionics and a preparation method thereof, and comprises a component main body which is a cross-layer structure of bionic snail shell; the component main body comprises an outer layer, a middle layer and an inner layer which are sequentially arranged; the fiber laying mode of the outer layer imitates the brick clay structure of a nacre layer; the fiber laying mode of the middle layer imitates the cross-layer structure of the snail shell; and the fiber laying mode of the inner layer imitates the spiral structure of a mantis shrimp chela rod. According to the force state difference of different positions in the stress process of the fiber reinforced composite material, the excellent natural structures such as shells, snail shells and mantis shrimp chela rods are combined and bionized, so that the mechanical properties of the fiber reinforced composite material are effectively improved, and the regional design is customized to endow the fiber reinforced composite material with the ability of adapting to complex and severe environments.

The utility model discloses a heat dissipation module and electronic equipment, the heat dissipation module comprises a wind wheel, a volute and a volute tongue, the volute and the volute tongue are matched to define a volute chamber and an air outlet communicated with the volute chamber, and the wind wheel is arranged in the volute chamber. The volute comprises a side coaming extending in the circumferential direction of the volute chamber, the side coaming comprises a connecting section used for limiting an air outlet, the volute tongue and the connecting section are oppositely arranged, and the air outlet is located between the connecting section and the volute tongue. Wherein the volute tongue comprises a guide section and an outlet section which are connected with each other, the guide section is connected with the side coaming and is arranged opposite to the connecting section, the inner wall surface of the guide section is an arc surface, in the direction far away from the wind wheel, the inner wall surface of the guide section is obliquely arranged along the direction far away from the connecting section, and the distance between the inner wall surface of the guide section and the connecting section is gradually increased. According to the technical scheme, the air volume loss can be reduced, so that the performance of the heat dissipation module can be improved in a limited space, and the heat dissipation effect is improved.

The invention relates to the technical field of oil mist recovery, and specifically discloses an electric oil mist recoverer for a screw air compressor, comprising an outer shell, wherein the bottom of the outer shell is evenly fixedly connected with four legs, the top of the outer shell is fixedly connected with a volute, the interior of the volute is fixedly connected with an air inlet pipe, the interior of the outer shell and the volute is provided with a conversion component, and the bottom of the outer shell is provided with a recovery device; through a centrifugal impeller and an axial flow impeller and blades in the two, the kinetic energy of the air and oil mist mixture passing through the interior is reduced, so that the air and oil mist mixture can pass through at a low speed, so that the oil mist particles and particulate matter are charged under the high-voltage electric field between two discharge electrode plates, and then fall on the oil accumulation electrode plate to capture the charged particles, so as to avoid the high-speed movement of the oil mist particles and particulate matter affecting the capture and recovery, and finally the rotating centrifugal impeller and the axial flow impeller can drive the purified air to continue to flow, so as to realize the recycling after the kinetic energy reduction.

The utility model discloses a low-temperature tunnel furnace with an air circulation structure, which is characterized in that a circulation air duct is arranged in a box body of the low-temperature tunnel furnace, a variable frequency motor is arranged at the top of the circulation air duct, and a centrifugal impeller is connected onto the variable frequency motor; the centrifugal impeller is installed in the volute, the volute is provided with an air outlet, and the evaporator is arranged below the volute. The variable frequency motor drives the centrifugal impeller to rotate, and air can enter the volute through the evaporator and can be output to the circulating air duct through the air outlet. According to the technical scheme, the temperature uniformity in the low-temperature tunnel furnace is improved, and the temperature and the cooling capacity in the low-temperature tunnel furnace can be effectively controlled.

The utility model discloses a large-air-volume turning plate range hood, and belongs to the technical field of range hoods. The multiple damping holes are formed in the wind receiving face of the left side of the volute, the damping cotton used for silencing is laid on the volute at the same position, noise generated by impact of airflow and the volute can be reduced through the damping holes, meanwhile, vibration of the volute can be reduced through the damping cotton, and therefore noise of the volute is further reduced; by arranging the larger impeller and the motor with larger power compared with a traditional fan assembly, the smoke suction capacity of the fan assembly can be improved, and therefore the smoke suction effect of the range hood is improved.

The present invention relates to a fan system for a range hood, a range hood and a control method thereof, comprising: a volute, comprising two cover plates arranged opposite to each other and an annular wall connected between the two cover plates, at least one cover plate being provided with an air inlet, and an air outlet being defined between the two ends of the annular wall and the two cover plates; an impeller, arranged in the volute, the rotation axis of the impeller being recorded as a first axis; the cover plate having a first side portion adjacent to the air outlet and a second side portion away from the air outlet, at least one cover plate comprising at least two plate bodies connected in sequence from the first side portion to the second side portion, each of the plate bodies being independently rotatable and connected to the annular wall in an angle-adjustable manner relative to a plane perpendicular to the first axis of the impeller. The cover plates of the volute are arranged as a plurality of plate bodies that can be tilted and moved in sections, and the tilt angle can be independently adjusted according to different flow characteristic partitions in the air duct of the range hood and the upper and lower areas inside the volute.

The present invention discloses the application of the keratin of the shell of snails in the radiocarbon 14 dating, and relates to the technical field of radiocarbon dating. Here, the method for extracting the keratin of the shell of snails includes the steps of collecting a sample of the shell of snails, performing crushing and washing treatments to obtain the washed shell of snails; sequentially immersing the washed shell of snails in a hydrogen peroxide solution and a first phosphoric acid solution, then washing with decarbonized water and freeze-drying to obtain a pretreated sample; preparing a second phosphoric acid solution with decarbonized water and orthophosphoric acid; putting the pretreated sample into the second phosphoric acid solution for decomposition to obtain a water-soluble solution containing the keratin of the shell of snails, filtering the residue, and then separating and purifying to obtain a keratin sample of the shell of snails. By adopting a method for extracting the keratin of the shell of snails with high efficiency and low pollution, the present invention is applicable to high-precision radiocarbon 14 dating research and has important scientific and practical application values.

The present application relates to the technical field of refrigeration equipment, and in particular to a horizontal glass door refrigerator with a three-dimensional air circulation device, which comprises an outer cabinet, an inner container, an air duct structure, a refrigeration system, and the air duct structure comprises an air duct cover, a supply air duct, and a return air duct. The supply air duct is arranged outside the inner container and comprises an air inlet duct and a supply air duct part. The air inlet duct comprises a snail shell-shaped bionic structure, and the snail shell is provided with a streamline structure that spreads outwards from the center. A centrifugal fan is installed in the circumferential center of the lower part of the snail shell. A flow guide baffle for dividing the cold air is arranged inside the air inlet duct. The air duct cover is arranged inside the inner container. A grid structure for guiding the air flow is arranged on the air duct cover. The grid structure is inclined towards the bottom of the inner container. The three-dimensional air cooling circulation air duct adopts a snail shell-shaped bionic structure design, and a flow guide baffle with a streamline design is arranged, thereby ensuring the uniformity of the air outlet on both sides of the cabinet.

The utility model discloses an impeller mounting structure, which comprises a volute (1), an impeller (2) and a locking assembly (3), and is characterized in that the locking assembly (3) comprises a fixed seat (31), and the impeller (2) is sleeved on the periphery of the fixed seat (31) through a bearing (21); the lower part of the limiting cylinder (32) is accommodated in the mounting hole (311) of the fixed seat (31), and the periphery of the limiting cylinder (32) is provided with a limiting flange (321) for limiting the inner ring of the bearing (21); and a movable sleeve (33). The guide block (323) of the limiting cylinder (32) can be inserted into the guide groove (332) of the movable sleeve (33) in a sliding mode so that the movable sleeve (33) can spirally move around the pin shaft (322) under the action of external force, and then the locking block (331) of the movable sleeve (33) can enter and exit from the locking groove (3121) of the fixed seat (31). The utility model further discloses a range hood applying the impeller mounting structure.

A submerged pump with an anti-reverse function comprises a vertical long-shaft submerged pump composed of a motor, a bearing chamber, a pump shaft, a barrel, an impeller and a snail shell, the upper portion of the barrel is connected with the bearing chamber, the lower portion of the barrel is connected with the snail shell, the pump shaft is located in the barrel, the lower portion of the pump shaft is connected with the impeller, and a positioning sleeve is fixedly connected to the outer circle of the pump shaft through a bolt. A permanent magnet ring is embedded in the outer circle of the positioning sleeve, the barrel is connected with a gland through a bolt at the permanent magnet ring, the gland extends into the barrel and is close to the permanent magnet ring, the gland is provided with a magnet exciting coil at the outer side of the permanent magnet ring, the magnet exciting coil is connected with a wire A and a wire B, the wire B is connected with an alarm, and the wire A is connected with a resistor. When the pump shaft rotates reversely, current generated by the magnet exciting coil drives the alarm to give an alarm, an operator is prompted to reconnect a power line, and the shell prevents the submerged pump from rotating reversely.

The application discloses a snail soaking treatment device, and relates to the technical field of snail treatment devices. A base is preset on the ground. A pre-washing assembly is fixed on one side of the base and is used for removing soil on the surface of a snail shell. A soaking assembly is fixed on the upper end surface of the base. A tumbling barrel is rotatably arranged in the soaking assembly. A conveying assembly is arranged in the soaking assembly and is located on one side of the tumbling barrel. A driving motor assembly is fixed on the side of the soaking assembly away from the pre-washing assembly and is used for driving the tumbling barrel and the conveying assembly. A material collecting box is fixed on the upper end surface of the base.

The invention belongs to the field of design of industrial centrifugal fans, and particularly relates to a rapid modeling and simulation method for a centrifugal fan based on a wing blade model. The centrifugal fan is divided into six parts, namely a volute part, an impeller, a space shape of a central cavity of the impeller, a space shape defined by the impeller and the volute, a current collector and a space shape of a gap between the current collector and the impeller, so that the actual geometric structure of the centrifugal fan can be quickly and accurately obtained, and structured grids of all parts of the centrifugal fan can be obtained; simulation resources are reduced, simulation precision and modeling accuracy are improved at the same time, the universality of centrifugal fan modeling and simulation is achieved, the method can be used for centrifugal fan mechanism analysis or optimization design, manpower cost input is greatly reduced, and repeated work is avoided.