2096 results about "Air blast" patented technology

An intelligent real-time adaptive control air-blowing-type condenser and a usage method therefor, belonging to the technical field of condensers. The intelligent real-time adaptive control air-blowing-type condenser comprises: a condenser body (1) arranged on a mounting frame (101), an axial flow fan (2) being arranged on the top of the condenser body (1); a filter screen (3), which is mounted on the side wall of the condenser body (1) by means of bolts; a cleaning mechanism (4), which is arranged on the outer side of the filter screen (3) and is configured to remove impurities from the filter screen (3); and a moving mechanism (5), which is arranged on the mounting frame (101) and is configured to drive the cleaning mechanism (4) to move, wherein the cleaning mechanism (4) comprises a dust collection shell (401), a cleaning assembly arranged in the dust collection shell (401) and configured to sweep the impurities away from the outer side of the filter screen (3), and a dust settling assembly arranged in the dust collection shell (401) and configured for dust settling. The filter screen (3) on the outer side of the condenser can be cleaned without shutdown of the condenser.

The invention relates to the field of coal mine exhaust control, in particular to a coal mine exhaust control method and device based on environmental perception. The method comprises the following steps: acquiring multi-dimensional monitoring signals based on environment sensing sensors at multiple positions of a mine, performing distributed sensing marking, and constructing a global gas concentration sensing graph; the method comprises the following steps: acquiring position information of operating personnel in real time based on a miner positioning sensor, performing short-time movement prediction on the operating personnel, and generating a miner movement prediction path; obtaining a coal mine internal structure chart, and carrying out average oxygen consumption rate budget and instantaneous oxygen supply demand calculation based on the miner movement prediction path to obtain oxygen supply demand indexes of each unit; and according to the oxygen supply demand index of each unit, intelligent exhaust power calculation adjustment is carried out, and a conventional exhaust control strategy is constructed. Ventilation efficiency of the coal mine area is improved, emergency blast treatment is carried out under the risk condition, the risk problem response capacity is greatly improved, and safety of the coal mine area is enhanced.

The invention relates to a direct current motor with an anti-electromagnetic interference structure in the field of motors, which is characterized in that the surfaces of a commutator and an electric brush are blown in real time through a magnetic shielding cylinder arranged on the outer side of the commutator and an air blowing blade arranged in the magnetic shielding cylinder, and carbon powder on the surfaces of the commutator and the electric brush is cleaned; the commutator and the electric brush are subjected to synchronous blowing heat dissipation, so that the commutator and the electric brush have relatively good contact stability, the condition of contact resistance increase caused by carbon powder accumulation is reduced, the probability of arc generation between the commutator and the electric brush is reduced, and the electromagnetic compatibility of the motor is further improved; the influence of a high-frequency magnetic field generated by the arc on a rotor winding coil is reduced, and electromagnetic interference is further reduced; in addition, the insulating groove formed in the commutator improves the collecting and cleaning effects of the carbon powder, and the insulating groove is matched with the diversion disc to realize ejection of the lower contact surface of the electric brush, so that the cleaning effect of the carbon powder is further improved.

The present invention provides a method and apparatus for predicting the temperature of molten iron in blast furnace smelting, an electronic device, and a storage medium. The method comprises: acquiring original fuel parameters, blast parameters, coal gas blowing parameters, furnace top coal gas parameters, and slag iron parameters in a blast furnace smelting process; on the basis of the original fuel parameters, the blast parameters, and the coal gas blowing parameters, determining the furnace bosh coal gas amount, the furnace bosh coal gas component, and the theoretical coal gas combustion temperature at a tuyere rotation area; determining the direct reduction degree of iron ore on the basis of the furnace top coal gas parameters, the slag iron parameters, the furnace bosh coal gas amount, and the furnace bosh coal gas component; determining a gas-liquid heat exchange coefficient on the basis of the theoretical coal gas combustion temperature, the furnace bosh coal gas component, the slag iron parameters, and the coal gas component after direct direction; and on the basis of the gas-liquid heat exchange coefficient, the direct reduction degree of iron ore, the theoretical coal gas combustion temperature, and the slag iron parameters, performing iterative solution of the molten iron temperature and the coal gas temperature, so as to complete prediction of the temperature of molten iron in the blast furnace smelting. The accuracy of molten iron temperature prediction can be improved, and a good basis is provided for blast furnace smelting control, ensuring stable and smooth operation of a blast furnace.

A fan includes a main body of fan and a bracket assembly. The main body of fan is connected to the bracket assembly. The main body of fan includes a blower part for blowing air, a rotating bracket and a main unit. The rotating bracket is arranged between the blower part and the main unit and is configured to connect the blower part and the main unit. The main unit is configured to control air blowing of the blower part. The bracket assembly includes at least one bendable and shapeable supporting leg configured to fix the fan to an external object. A rotating bracket is rotatably connected to both a blower part and a main unit, enabling vertical and horizontal rotation of the blower part. This configuration achieves multi-angle adjustment of the blower part, simplifies user control over airflow direction, and thereby significantly improves user experience.

The utility model provides a treatment system for a refuse landfill, which comprises a plurality of repair wells and a plurality of extraction wells arranged on the refuse landfill, and an aerobic aeration, liquid phase and gas phase extraction system connected with the repair wells and the extraction wells, the aerobic aeration and liquid phase and gas phase extraction system comprises air blasting equipment, moisture and nutrient substance blending equipment, landfill gas extraction equipment and leachate extraction equipment, the air blasting equipment is connected with the repair well, and an inlet connected with the moisture and nutrient substance blending equipment is formed in the air blasting equipment; and the landfill gas extraction equipment and the leachate extraction equipment are connected with the extraction well. According to the utility model, comprehensive treatment of the refuse landfill is realized, and the system is not only suitable for in-situ treatment of stock refuse without excavation and departure, but also suitable for stabilization pretreatment of stock refuse excavation, departure and ex-situ treatment.

The utility model relates to the technical field of traditional Chinese medicinal material treatment, in particular to material screening equipment for traditional Chinese medicinal material treatment, and aims to solve the technical problems that a traditional winnowing technology is low in separation precision, poor in adaptability to medicinal materials with different densities and shapes and prone to causing medicinal material loss. Comprising a feeding mechanism, a winnowing box, an air inlet channel, an air channel, a discharging channel, an air pipe, an air outlet, a ball valve, a sliding plate, a connecting plate, a hydraulic cylinder, a support, a feeding shell, feeding blades and a feeding shaft, a draught fan blows air into the winnowing box through the air inlet channel to conduct winnowing on medicinal materials, and then high-speed airflow carries the medicinal materials to enter the next winnowing box through the air channel. The wind power in the next winnowing box is reduced by adjusting the opening degree of the ball valve, impurities with the quality slightly close to that of normal medicinal materials are further removed, in this way, during multi-stage treatment, complete separation of the medicinal materials and the impurities and impurity removal, all the sliding plates are controlled to slide out at the same time, the winnowing boxes are communicated with one another, impurities fall down and are discharged through the bottom winnowing box, and impurity removal is completed.

The invention relates to the technical field of metal powder processing, in particular to powder processing cooling equipment which comprises a cooling box and a feeding hopper. The metal powder cooling device further comprises an evaporative cooling mechanism, a coil cooling mechanism, an air blower, an exhaust pipe and a material receiving mechanism, cooling liquid is injected into a cooling cavity of the cooling box, the evaporative cooling mechanism conducts primary cooling on metal powder conveyed by the feeding hopper through cooling liquid fog drops, the evaporative cooling mechanism is connected with the coil cooling mechanism, and the coil cooling mechanism is soaked in the cooling liquid. The air blower blows air to the coil pipe cooling mechanism so that the metal powder can be conveyed in the coil pipe cooling mechanism, the metal powder exchanges heat with cooling liquid through the coil pipe cooling mechanism in the conveying process to be subjected to secondary cooling, and the exhaust pipe is used for exhausting gas blown into the coil pipe cooling mechanism by the air blower. The material receiving mechanism is used for receiving the metal powder output by the coil pipe cooling mechanism; the metal powder is subjected to multi-stage cooling in the conveying process, the cooling efficiency is high, dust generation and diffusion are reduced, and the environmental protection property is good.

The invention relates to the technical field of dust concentration measurement, and particularly discloses a dust concentration intelligent detection device and method, the dust concentration intelligent detection device comprises a shell assembly, the shell assembly comprises a main shell, a ventilation pipe is arranged on one side of the main shell, a top shell is arranged above the ventilation pipe, a bottom shell is arranged below the ventilation pipe, and an air blowing assembly is arranged in the ventilation pipe; a rotating assembly is arranged in the main shell, an air blowing assembly is arranged outside the rotating assembly, a dust collection assembly is arranged on one side of the rotating assembly, and a measuring assembly is arranged on the bottom side of the air blowing assembly. And under the reflection of the oblique light source of the measuring assembly, by utilizing the sensitivity of light reflection, a descending minimal variable is converted into a moving huge variable after the light is reflected, so that the magnification observation of the weight is facilitated, and the accuracy of the experiment is improved.

A vehicle control system and method based on an air flow rate, control introduction of outside air based on an estimated driving current value of a blowing device, obtained through a current model preset based on a calm wind state, and an estimated air flow rate value of an inlet, obtained through an air flow rate model preset based on an outside wind state.

The invention relates to an intelligent aeration system and a control method, and belongs to the technical field of sewage treatment. The system comprises a clean water tank, an aeration tank, a data acquisition unit, a PLC control unit and an aeration unit. The system dynamically calculates the required DO set value by collecting the inlet water chemical oxygen demand, the clear water ammonia nitrogen concentration, the sludge concentration and the sewage temperature of sewage in real time, calculates the difference value between the actual DO value and the required DO set value, calculates the aeration amount needing to be adjusted, and finally adjusts the blast volume through the aeration unit. The problems that a traditional aeration system is high in energy consumption and low in control precision are solved, insufficient aeration or excessive aeration can be effectively avoided, and stable effluent quality is guaranteed.

The invention relates to spraying equipment for preventing and controlling atmospheric pollution in the field of spraying devices, and through a plurality of nozzles mounted on a rotating ring and an inserting cylinder driven by an electric push rod, the nozzles are quickly replaced, the spray particle size is quickly and accurately adjusted, and the mode of manually replacing the nozzles is replaced; the spray particle size adjusting efficiency and accuracy are improved, the requirement of low-temperature weather for the fog drop particle size is met, fog drop icing is delayed, and the dust adsorption capacity of fog drops at the low temperature is improved; meanwhile, the spray particle size is detected in real time through a laser particle size instrument arranged on the front side of the air blowing cylinder, and when it is found that the spray particle size does not meet the requirement, early warning is given out in time to remind an operator to conduct maintenance, and waste of sedimentation liquid is reduced; in addition, by arranging a heating sleeve and a heat exchange pipe, the sedimentation liquid is preheated and heated in winter, the freezing speed of the fog drops is further delayed, the dust particle adsorption effect of the fog drops is improved, and energy is saved.

The invention relates to the technical field of drying boxes, and provides an electrothermal blowing drying box which comprises a box body and further comprises a plurality of drying trays, a hot air mechanism, a protective cover and a stirring mechanism, the drying trays are located in the box body and used for containing objects to be dried, and the hot air mechanism is used for conveying hot air into the box body; the hot air mechanism comprises a heating bin, a hot air channel, air blowing blades and an exhaust pipe, a temperature controller is installed in the heating bin, an air inlet is formed in the box body and communicates with the heating bin, the hot air channel is formed in the side wall of the box body, the air blowing blades are rotatably arranged in the heating bin, and the exhaust pipe communicates with the top of the box body; the protective cover is fixedly connected to the box body, a plurality of filtering holes are formed in the protective cover, and the stirring mechanism is used for stirring the to-be-dried objects in the drying tray. According to the technical scheme, the problem that in the prior art, dust adheres to the surface of a dried object, and the quality of the dried object is affected is solved.

The invention relates to the related technical field of precision part machining, in particular to a feeding device for precision part machining, which comprises a machining machine tool, a machining tool magazine seat and a machining table, and is characterized in that a stepping screw rod for driving the machining table to move is arranged at the inner bottom of the machining machine tool through a machine tool base; a base guide rail used for limiting and guiding the machining table is arranged on the side edge of the stepping screw rod in the machining machine tool. Chippings on the periphery of the stepping screw rod which rotates are cleaned through air blowing spray heads in the air blowing cleaning assembly, and the multiple air blowing spray heads which are precisely designed are ingeniously arranged in the key peripheral area of the stepping screw rod; continuous clean compressed air flow is utilized to form a directional air flow barrier, the upper surface of the lead screw is protected, meanwhile, the periphery of the lead screw can be cleaned, scraps on the base guide rail are cleaned in a back-and-forth swinging mode by twisting a cleaning plate in the cleaning assembly, the cleanliness of the base guide rail is improved, and the feeding stability performance of the machining table is improved.

The invention provides an intelligent copper blowing system based on multi-modal sensing. The intelligent copper blowing system comprises a multi-modal sensing system, an intelligent decision and control module, a real-time simulation system, an air supply system and a flexible sealing smoke hood. The multi-mode sensing system collects melt components in the furnace, temperature field distribution, equipment operation states and environmental pollutant concentration data in real time. And the intelligent decision and control module predicts a flow field and pollutant diffusion path through a real-time simulation system based on the sensing data, and generates a dynamic control instruction. The air supply system adjusts the blast pressure and the oxygen concentration according to instructions, the flexible sealing smoke hood dynamically adjusts the expansion amount of the sealing apron board, and smoke leakage is restrained. The smelting efficiency can be improved, pollutant emission is reduced, and the service life of equipment is prolonged.

The invention discloses a high-efficiency high-fire combustion system which is characterized by comprising a furnace end assembly, an injection pipe, a gas distribution ring, an air door plate, an air blowing box, an air blower and a valve body assembly, the air door hole extends towards the air inlet end of the injection pipe to form an air door ring wall; the outer wall of the part, extending into the blast cavity, of the gas nozzle and the annular wall of the air door form a blast air guide channel; the air blowing and guiding channel is arranged on the periphery of the gas nozzle in a surrounding mode. According to the invention, in a high-fire combustion state, the bypass air channel supplements additional high-fire gas to the high-fire gas supply cavity on the front side of the gas distribution ring through the high-fire gas supply cavity, meanwhile, the air blower is started, additional air is blown to the air blowing cavity through the air blowing box, and the additional air is forwards sent out through the air blowing and guiding channel; and a continuous, stable and high-speed'air curtain barrier 'is formed on the periphery of the outlet of the gas nozzle. The annular air curtain can resist external pressure fluctuation even if the blower operates at high power to generate strong wind.

A blast furnace operation method according to one aspect of the present disclosure comprises: a parameter estimation step for estimating blast parameters and a pulverized coal ratio in a second operation, such that the amount molten iron produced, the molten iron temperature, and the furnace top gas temperature in the second operation match those in a reference operation; a change information acquisition step for acquiring information on a temporal change in one or both of the molten iron temperature and the amount of molten iron produced when performing the second operation based on the blast parameters and the pulverized coal ratio estimated in the parameter estimation step with a delay of a predetermined time after switching from the reference operation to the first operation; a repeating step for performing the change information acquisition step a plurality of times while changing the predetermined time; and an optimum delay time acquisition step for determining, as an optimum delay time, a predetermined time such that the temporal change in the molten iron temperature or the amount of molten iron produced is the smallest, on the basis of the information acquired in the repeating step. After switching from the reference operation to the first operation, the second operation based on the blast parameters and the pulverized coal ratio estimated in the parameter estimation step is started with a delay of the optimum delay time.

The utility model discloses a polyester film corona treatment device which comprises a main body mechanism, the main body mechanism comprises a shell, two corona treatment assemblies symmetrically mounted on the inner wall of the shell, guide rollers mounted on the inner walls of the two sides of the shell respectively, tension rollers rotationally mounted on the opposite inner walls of the shell, a plurality of air blowing pipes fixed on the opposite inner walls of the shell, and an air blowing piece mounted on one side of the shell and communicated with the air blowing pipes; the support is fixed to the inner wall of the shell, the filtering part is embedded in the support in a sliding mode and extends out of the shell, the shell is used for installing other assemblies, meanwhile, a closed environment is formed, dust is prevented from being attached to a film in the corona treatment process, the corona treatment assemblies are used for conducting corona treatment on the film, and the two corona treatment assemblies are symmetrically arranged, so that the corona treatment efficiency is improved. The corona treatment device for the polyester film can perform corona treatment on the two sides of the film at the same time, the corona treatment efficiency of the film is improved, and the corona treatment device for the polyester film has the advantages of good corona efficiency and corona effect.

The invention relates to the technical field of solid material drying and smashing, and discloses sugarcane nitrogen-fixing microbial inoculum drying and smashing equipment which comprises a drying machine, an auger conveyor and a smashing machine body, a first supporting seat is arranged at the bottom of the drying machine, and a second supporting seat is arranged at the bottom of the smashing machine body. A crushing chamber is arranged under the crusher body, the two ends of the auger conveyor are located under the drying machine and over the crusher body respectively, the drying machine is arranged on one side of the top of the first supporting seat, and a heat recovery mechanism is arranged on the other side of the top of the first supporting seat. A screening mechanism is arranged on one side of the top of the second supporting base. The heat energy utilization rate is increased through a closed hot gas recovery system, automatic connection of drying and smashing links is achieved through auger conveying and blast conveying, efficient flow dividing is achieved in combination with power sweeping and a double-layer screening structure, the energy efficiency, the screening precision and the product percent of pass are remarkably improved, and continuous and stable operation of equipment is guaranteed.

The invention belongs to the technical field of coal bed gas exploitation, and particularly relates to an extraction system and method for high-pressure air blasting and hot flue gas displacement of coal bed gas. The system comprises a high-pressure air blasting unit, a hot flue gas injection unit, a gas extraction unit and a data monitoring unit, the high-pressure air blasting unit and the hot flue gas injection unit share the same blasting and gas injection well, an extraction well is arranged on the outer ring of the blasting and gas injection well, and the gas extraction unit extracts gas through the extraction well; the coal seam is subjected to fracturing and permeability increasing through high-pressure air blasting, the coal seam can be effectively fractured, and the permeability of the coal seam can be effectively improved; hot flue gas is injected after high-pressure air blasting permeability increasing is conducted on the coal seam, the hot flue gas can be smoothly injected into the coal seam, and the coal seam is further fractured; the temperature of the coal seam can be increased by injecting the hot flue gas, desorption and migration of CH4 are facilitated, meanwhile, CH4 in an adsorption state is replaced by CO2 by means of the adsorption characteristic of CO2, and CO2 is effectively sealed in the coal seam while the desorption amount of the coal seam gas is increased.

The present disclosure relates to a pneumatic serial device for spraying materials into a deep soil layer and an implementation method thereof. The device comprises a material spraying injector (1), a air blasting system (2) connected with the material spraying injector (1), and a material feeding system (3), wherein the air blasting system (2) and the material feeding system (3) are connected with the material spraying injector (1) in series in sequence, wherein the air blasting system (2) comprises a high-pressure air tank (2-1) and a quick relieve valve (2-2), the material feeding system (3) comprises a material chamber (3-1), a feeding valve (3-2), a valve I (3-3), a material sending chamber (3-4), a valve II (3-5) and a material delivery pipe (3-6) which are connected to each other in sequence, and the material delivery pipe (3-6) extends into the high-pressure air tank (2-1) and is communicated with the quick relieve valve (2-2) at the bottom thereof. Combined with the implementation method thereof, the device can uniformly apply a certain amount of various materials into the soil layer at any depth, replacing the traditional method, greatly improving the operation efficiency of applying materials into the deep soil layer, significantly reducing the cost of applying materials into the deep soil layer, and reducing the labor intensity.

The present invention relates to the technical field related to precision parts processing, and in particular to a feeding device for precision parts processing, comprising a processing machine tool, a processing tool magazine seat and a processing table, wherein the inner bottom of the processing machine tool is provided with a stepping screw for driving the processing table to move through the machine tool base, and a base guide rail for limiting and guiding the processing table is provided on the side of the stepping screw in the processing machine tool. The present invention cleans the debris on the periphery of the rotating stepping screw by the blast nozzle in the blast cleaning assembly, and a plurality of precisely designed blast nozzles are cleverly arranged at the key peripheral area of ​​the stepping screw, and utilizes a continuous clean compressed air flow to form a directional airflow barrier to protect the upper surface of the screw rod, while also achieving the cleaning of the periphery of the screw rod, and the debris on the base guide rail is swung back and forth by twisting the cleaning plate in the cleaning assembly to clean the debris, thereby improving the cleanliness of the base guide rail and improving the stable performance of the processing table feeding.

The utility model discloses a fire extinguishing bag gas circuit filling mechanism for an aviation fire extinguishing water tank, which comprises a blast unit, a feeding unit, a hatch unit, a feeding unit, a dragging unit and a sealing pull ring component unit, and the blast unit, the feeding unit, the hatch unit and the feeding unit are sequentially abutted and fixedly connected. One end of the dragging unit is detachably connected with the feeding unit, the other end of the dragging unit is fastened with the sealing pull ring assembly unit, the air blowing unit and the feeding unit are installed on the outer side of the top of the water tank, the hatch unit, the feeding unit and the dragging unit are located in the water tank, and the sealing pull ring assembly unit is located on the outer side of the water tank. The mechanism solves the problems that in the prior art, when an aviation fire extinguishing water tank is filled with fire extinguishing bags, the filling efficiency is low, the fire extinguishing bags are unsmooth to convey, and a hose is unsmooth to move.

The utility model relates to the technical field of waste heat recycling, and particularly discloses a waste heat recycling device of a sintering circular cooler, which comprises a dust removal structure and a heat exchange structure connected with the dust removal structure, and the dust removal structure comprises a primary cyclone dust removal assembly and a secondary cyclone dust removal assembly communicated with the top of the primary cyclone dust removal assembly. An air blowing assembly is arranged at the top of the secondary cyclone dust removal assembly; the heat exchange structure comprises a supporting frame, a first heat exchange tank and a second heat exchange tank, wherein the first heat exchange tank and the second heat exchange tank are horizontally installed on the supporting frame. Heat exchange pipe sets are arranged in the first heat exchange tank and the second heat exchange tank. The sintering circular cooler waste heat recovery device achieves efficient dust removal and waste heat recovery of high-temperature waste gas, has the advantages of being simple in structure, convenient to maintain, high in heat exchange efficiency and the like, and is suitable for the field of sintering circular cooler waste heat recovery in steel smelting and other industries.

The invention discloses a waveguide beam control high-sound-pressure-level sound wave expelling device and system, and relates to the technical field of sound wave expelling devices.The waveguide beam control high-sound-pressure-level sound wave expelling device comprises a bottom fixing base, the left side and the right side of a concave supporting frame are fixedly connected with array protection shells correspondingly, and multiple sets of high-sound-pressure-level sound wave array units are installed in the array protection shells. According to the waveguide beam control high-sound-pressure-level sound wave expelling device and system, the air collecting cavity, the negative pressure fan, the air outlet flat pipe and the air spraying nozzle are arranged, when the device is used, in the working process of equipment, the negative pressure fan at the top of the air collecting cavity continuously blows air into the air collecting cavity, the air pressure in the air collecting cavity is increased, and air flow continuously blows air to the surface of a camera module along the air outlet flat pipe and the air spraying nozzle; an air curtain is formed on the surface of the lens cleaning device, dust covering is prevented, rainwater can be blown away in rainy days, the lens cleaning and dust prevention functions are achieved, and the problem that the device does not have the lens cleaning and dust prevention functions is solved.

The utility model discloses a multi-head atomizing spiral-flow type commercial liquid fuel kitchen range, which is characterized in that an oil collecting cavity is formed in a furnace seat in a surrounding manner, and an oil tank can supply oil to the oil collecting cavity; the gas distribution disc is mounted above the furnace seat; the fire cover covers the gas distribution disc and is provided with a gas mixing cavity in a surrounding mode. The gas distribution disc extends towards the oil collection cavity and is provided with a plurality of injection pipes; the injection pipe is provided with an atomizer which can convert liquid fuel in the oil collecting cavity into mist and send the mist to the gas mixing cavity; the air blower can blow air towards the oil collecting cavity, and the air is sent out towards the air mixing cavity through the injection pipe. According to the utility model, the formed rotary fuel mixed gas is upwards sent out through the fire cover, so that the mixing efficiency of fuel and air is effectively improved; the combustion stove is simple in structure and does not need to be matched with a high-pressure oil pump for use, a main body structure of the combustion stove can be formed by embedding the gas distribution disc into the stove seat structure which is in the shape of the liner stove bag and is made of flat metal plates, the overall size of the commercial stove is reduced, the weight is reduced, and the production cost is effectively reduced.

The invention relates to the technical field of fatigue testing, and discloses a blade fatigue testing device and method based on a vortex-induced vibration principle, the blade fatigue testing device based on the vortex-induced vibration principle comprises a test bench foundation and at least one excitation unit, the test bench foundation is suitable for fixing a blade root of a tested blade; the excitation unit comprises a blade cover body and a pneumatic loading module, the blade cover body is of an annular structure fixedly arranged on the periphery of a test blade in a sleeving mode, the pneumatic loading module is arranged below the blade cover body, and the pneumatic loading module comprises a frame and at least one air blowing piece installed on the frame; wherein the air blowing piece is configured to blow air to the blade cover body, and turbulent flow is formed at the blade cover body. Non-contact excitation is achieved through aerodynamic coupling, the additional mass influence caused by mechanical connection is avoided, and full-size fatigue verification of the blade is completed under the condition that the natural vibration characteristic is kept.

The utility model discloses a peanut sheller. The peanut sheller comprises an extrusion bin and a locking mechanism, an air blowing bin is arranged at the lower end of the extrusion bin, a screening hopper is arranged at the lower end of the air blowing bin, an insertion groove is formed in the upper end of the extrusion bin, an insertion plate is inserted into the insertion groove, and a cleaning scrubbing brush is arranged in the insertion plate; the locking mechanism comprises locking ribs, fixing shafts and locking handles, the locking ribs are fixedly connected to the front end and the rear end of the insertion plate respectively, the fixing shafts are fixedly connected to the front end and the rear end of the extrusion bin respectively, the locking handles are rotationally connected to the middles of the fixing shafts respectively, the locking handles are connected with the longitudinally adjacent locking ribs in an inserted mode, and the locking mechanism further comprises locking openings. According to the peanut husking machine, peanut shells on the outer surfaces of the extrusion rollers can be cleaned in time, the situation that the subsequent peanut husking effect is affected due to accumulation of the peanut shells is avoided, and meanwhile replacement of the cleaning scrubbing brush is facilitated.

The utility model relates to the field of wine brewing, and discloses a vinasse spreading and airing device which comprises a base, a groove is formed in the upper end of the base, an air cavity is formed in the base, a supporting bottom plate is inserted in the groove in a sliding mode, moving wheels are arranged at the four corners of the bottom face of the supporting bottom plate, and a lifting mechanism for driving the supporting bottom plate to ascend and descend is arranged in the base. One end of the supporting bottom plate is fixedly connected with hinged frames which are correspondingly arranged on the two sides, the upper ends of the hinged frames on the two sides are hinged to a metal spreading and airing plate, the end, away from the hinged frames, of the supporting bottom plate is fixedly connected with a supporting column, heat dissipation holes are evenly formed in the metal spreading and airing plate, and an air blower is fixedly connected into the air cavity. And an air blowing hole communicated with the air cavity is formed in the inner wall of the groove. Compared with the prior art, the vinasse spreading and cooling device has the advantages that vinasse can be conveniently and rapidly spread and cooled, and the vinasse can be conveniently transferred and stacked.

The utility model discloses a double-premixing burner. The double-premixing burner comprises a furnace end assembly and a first-stage premixing assembly connected to the furnace end assembly. The furnace end assembly comprises an injection pipe, and the injection pipe is provided with a second-stage premixing cavity and a natural injection hole communicating with the second-stage premixing cavity. The first-stage premixing assembly comprises an air blower and a first-stage premixer connected to the air blower, and an outlet of the first-stage premixer communicates with the second-stage premixing cavity. According to the double-premixing burner and the gas stove thereof, the natural air injection structure and the air blowing mechanism are combined, and meanwhile, the adjusting assembly is arranged at the inlet end of the natural air injection structure and used for adjusting the natural air inflow according to fluctuation of the air blowing mechanism, so that the fluctuation influence of the air blowing mechanism is reduced, and the combustion efficiency is improved. And meanwhile, the defect that the air inflow is insufficient due to the fact that only a natural air injection structure is adopted is overcome.