40results about How to "Avoid direct access" patented technology

The invention relates to a power data federated learning privacy protection method based on efficient homomorphic encryption. The method comprises the following steps: step 1, a client initializes a neural network model; step 2, the server side encrypts and updates local neural network model gradient parameters uploaded by the client side; 3, the server side executes gradient average aggregation operation, the server side does not need to decrypt, the encrypted gradient parameters uploaded by the client side are directly calculated, an average value is solved, and therefore global gradient parameters are updated; step 4, after each client receives the updated global gradient, carrying out decryption calculation operation; 5, loading the updated weight parameters of the neural network model into a local neural network model, and performing neural network model training by using a local data set; the problems that an existing encryption technology is large in operand, large in computing resource overhead and low in algorithm efficiency, and privacy leakage exists in the transmission and analysis process of power data can be solved.

The invention discloses a symmetric searchable encryption method and device with a hidden search mode, equipment and a medium, and relates to the technical field of data retrieval, and the method comprises the following steps: obtaining an encrypted document uploaded by a data owner and a corresponding security index, respectively converting the security index into a corresponding first vector and a corresponding second vector through a bloom filter and a confusion bloom filter of the cloud server; when a keyword query vector sent by a data user is received, performing matching calculation on the first vector, the second vector and the keyword query vector based on a preset homomorphic encryption algorithm and the homomorphic encryption public key to obtain a corresponding matching calculation result; and sending a matching calculation result to the data user, so that the data user decrypts the matching calculation result by using the homomorphic encryption private key to obtain a corresponding first vector dot product result and a corresponding second vector dot product result, decrypting the first vector dot product result and the second vector dot product result by using the pseudo-random encryption shared key, and sending the decrypted result to the data user. And obtaining a corresponding plaintext document identifier set containing the keyword.

This utility model provides a welding fume purification and collection device for metal products. The device includes a housing, a filter assembly, a pipe body, an air inlet hood, and a pre-filtration mechanism. The filter assembly, housed within the housing, includes a fan, a filter element, and a telescopic pipe. The fan's input end is connected to the filter element, and the other end of the filter element is connected to the telescopic pipe, which communicates with the pipe body. The pre-filtration mechanism is located within the telescopic pipe. This device relates to the field of welding fume treatment. By incorporating a pre-filtration mechanism within the telescopic pipe, this utility model effectively filters and intercepts large-sized impurities carried in the welding fume before it enters the filter element, preventing these impurities from directly entering the filter element. This significantly reduces the risk of filter element clogging and damage, extends the filter element's service life, and reduces maintenance and replacement costs.

The utility model discloses an electromagnetic heating humidifier which comprises a shell, an electromagnetic heating device, an electromagnetic heating device, an electromagnetic heating device, an electromagnetic heating device and an electromagnetic heating device. The middle of the shell is provided with a containing box, and the bottom of the containing box is provided with a plurality of hanging pins and connecting pins. The electromagnetic heating assembly is arranged in the shell and located below the containing box. The water tank is detachably arranged in the accommodating box; the base plate is arranged at the bottom of the shell, the weight of the humidifier acts on the base plate through butt joint and fixation of the connecting columns and the connecting feet, the base plate is provided with a weighing sensor, and the weighing sensor is electrically connected with the circuit board. According to the utility model, the weighing sensor is used for indirectly monitoring the water quantity, the signal interference of a magnetic conductive material to the sensor is avoided, the compatibility problem of the detachable water tank and electromagnetic heating is solved, the balance between the convenient cleaning of the detachable water tank and the electromagnetic heating efficiency is realized, and the installation limitation of the sensor is avoided through indirect weight detection; the rigid connection structure ensures the pressure measurement precision and effectively reduces the risk of dry burning.

This invention belongs to the field of lithium-ion battery electrolyte material preparation technology, and provides a solid lithium hexafluorophosphate with low fine crystal content and its preparation method. The preparation method involves adding lithium fluoride to anhydrous hydrogen fluoride to form anhydrous hydrogen fluoride slurry. A portion of the anhydrous hydrogen fluoride slurry and phosphorus pentafluoride gas are fed into a primary continuous reaction crystallizer. The resulting slurry is subjected to low-temperature fractionation to form a first stream and a second stream. The second stream enters a secondary continuous growth crystallizer and continues to react with phosphorus pentafluoride gas, followed by solid-liquid separation to obtain a solid wet product and mother liquor. The first stream, another portion of the anhydrous hydrogen fluoride slurry, and a portion of the mother liquor enter a pre-conditioning section, and the resulting pre-conditioned stream is returned to the feed end of the primary continuous reaction crystallizer. The solid wet product is then subjected to low-temperature washing and programmed vacuum drying to obtain the final product. This method, through the combination of fractional reflux, mother liquor participation in pre-conditioning, and continuous growth processes, reduces fine crystal entrainment and improves particle size distribution stability.

The invention provides a password device discovery method and a computer device, and relates to the technical field of password application. The method comprises the following steps: responding to an access event triggered by a software application on a current password device, obtaining device feature information of the current password device in multiple dimensions, generating device fingerprint information of the current password device according to the device feature information in multiple dimensions, and sending an access request to a server of the software application according to the device fingerprint information, the access request is used for enabling the server to detect the equipment fingerprint information by adopting an equipment fingerprint detection algorithm according to a preset equipment fingerprint database to obtain a fingerprint detection result of the current password equipment, receiving a first access response sent by the server, and sending the first access response to the server; the first access response is an access response triggered when the server determines that the current password device is the registered password device. Complicated and unique equipment fingerprint information is generated through multi-dimensional equipment feature information, and omnibearing and high-precision identification of the identity of the password equipment is realized.

The utility model relates to the technical field of autoclaved fly ash green brick drying, and discloses an autoclaved fly ash green brick drying device which comprises a drying box and a cooling box, a filter cartridge is fixedly arranged at one end, close to the cooling box, of an exhaust pipe, a filter element is embedded in the filter cartridge, a spiral copper pipe is installed in the cooling box, and the spiral copper pipe is fixedly connected with the drying box. According to the waste gas cooling device, impurities contained in waste gas are filtered and intercepted through the filter element firstly, then the waste gas enters the spiral copper pipe in the cooling box, cooling water is driven by the circulating pump to surround the spiral copper pipe, the cooling water is cooled through the cooling water, and the waste gas is cooled through the cooling water. The heated cooling water can flow into the cooler to be cooled, then flows back into the cooling box to be recycled and is conveyed and distributed into the multiple sets of U-shaped hot air pipes through the air distribution pipes, hot air flow is jetted out in multiple directions, it is guaranteed that all the surfaces of each brick can make contact with hot air in cooperation with the multiple layers of trays, drying dead corners are avoided, and the drying efficiency is improved.

The invention discloses a separated data hardware access encryption device, and relates to the technical field of computer security hardware and data encryption, and the key points of the technical scheme are as follows: a host control module is used for carrying out encryption operation on write-in data and / or carrying out decryption operation on read data; the control on the data flow is realized through a first hardware data link with a switch; the system storage module is used for storing the encrypted data through a storage hardware medium and controlling the data flow through a second hardware data link with a switch; and the information management module is used for generating key information according to the input configuration information. The encryption and decryption function and the data storage function are physically separated, it is ensured that encryption and decryption operation is conducted in a special hardware module, data storage is conducted on an independent hardware medium, and the risk that data are directly accessed and cracked in the storage process is effectively avoided through the design.

This invention discloses a dust removal device used in the battery recycling process, relating to the field of dust removal equipment technology. It includes: a reaction dust removal unit comprising a reaction component mounted on a fixed support, a guide component inside the reaction component, a recycling component at the bottom of the guide component, and a water curtain component on one side of the recycling component; a conical tank on the fixed support; a connecting pipe on one side of the conical tank; a buffer component inside the conical tank; a return spring inside the buffer component; and a push plate at the other end of the return spring, with the push plate slidably connected to the buffer component. After dust and harmful gases enter the reaction component, they impact the buffer component for cushioning and guidance. The water curtain component draws ammonia water from the recycling component and sprays out three layers of water curtain. After the dust and gases impact the water curtain, they come into large-area contact with the ammonia water, causing the harmful gases to react, lowering the temperature, and adsorbing large heavy metal particles which fall into the recycling component. The ammonia water is filtered and recycled.

The utility model discloses a novel drying furnace double air seal structure which comprises a drying furnace chamber body, a first air curtain air port device and a second air curtain air port device are respectively arranged on the inner side of the drying furnace chamber body, and a first folding plate, a second folding plate and a third folding plate are arranged between the first air curtain air port device and the second air curtain air port device in a crossed mode. By means of the structure, the double-air-seal structure is composed of the two sets of air curtain air opening devices and the multiple folded plates, the double-air-seal structure is installed at the top of the drying furnace chamber body, meanwhile, external cold air is prevented from directly entering the drying furnace, the second air curtain air opening device and the first folded plate form the backflow cavity, hot air overflowing is further reduced, and the drying efficiency is improved. The first baffle and the second baffle block hot air possibly appearing at the bottom and the top from overflowing correspondingly, hot air returns to the heating device through the air return opening, and hot air circulation is formed. A double-air-seal structure is adopted, overflowing of hot air in the drying furnace and direct entering of cold air outside the furnace into the furnace are reduced, and the temperature in the furnace is maintained to be stable to the maximum extent.

The present application provides a remote identity authentication method, apparatus, device and storage medium, the method comprising: after the terminal device obtains an obfuscation sequence from a server, the facial data of the user to be authenticated is filled according to the obfuscation sequence to generate the filled facial data. Then, the facial data of the user to be authenticated is filled according to the obfuscation sequence to generate the filled facial data. After that, the facial data is processed to obtain a verification value. Finally, the verification value is filled into a preset position of the filled facial data to generate target facial data, and the target facial data is sent to the server. In this solution, since the data transmitted by the terminal device to the server is filled, it is prevented from the attacker being able to directly obtain the original data when the data is leaked, and the server can verify whether the target facial data has been tampered with according to the verification value carried in the target facial data, thereby further ensuring data security.

The application provides an engine crankcase ventilation system, comprising a cylinder head, a cylinder head exhaust chamber of the cylinder head being communicated with a cylinder head exhaust chamber of the crankcase through a cylinder head internal oil gas return channel, a first crankcase internal oil gas return channel, a second crankcase internal oil gas return channel, a third crankcase internal oil gas return channel, a fourth crankcase internal oil gas return channel, an oil pan exhaust chamber of an oil pan and the cylinder head exhaust chamber; the cylinder head exhaust chamber is communicated with a transmission case exhaust chamber of a transmission case, a crankcase longitudinal separation channel and a flywheel housing upper horizontal oil gas channel at a free end; the cylinder head exhaust chamber is communicated with a flywheel housing exhaust chamber of a flywheel housing, a flywheel housing internal vertical oil gas channel, a flywheel housing upper horizontal oil gas channel, a breather and a flywheel housing oil return channel at a transmission end; and the breather oil return channel is communicated with the oil pan exhaust chamber. The engine crankcase ventilation system effectively reduces breather separation pressure, reduces oil consumption and air pollution.

The utility model provides a battery pack. The battery pack comprises a box body, the battery module is arranged in the box body; the battery module comprises a plurality of battery cells arranged in an array, and at least one side of each battery cell is provided with an anti-explosion valve; the pressure relief assembly comprises a first pressure relief piece and a second pressure relief piece, the first pressure relief piece is arranged on one side of the battery module in the first direction, and the second pressure relief piece is adjacent to the first pressure relief piece and is arranged on one side of the battery module in the second direction; wherein the first pressure relief piece is provided with a first pressure relief channel, the second pressure relief piece is provided with a second pressure relief channel, the first pressure relief channel and the second pressure relief channel are communicated in a sealed mode, and the anti-explosion valve is oppositely communicated with the first pressure relief channel. The pressure relief substance of the explosion-proof valve is sprayed into the first pressure relief channel and flows along the second pressure relief channel, so that pressure relief guide is performed on the pressure relief substance, the pressure relief substance is prevented from directly entering the box body, the influence of the pressure relief substance on an electric device is reduced, and the safety performance of the battery pack is improved.

The double-air-hole angled high-reliability pilot valve with the dustproof boss comprises a valve cover (1) and a cover column (2) integrally formed with the valve cover, two inclined air holes (3) inclining downwards are symmetrically formed in the side wall of the cover column, and the dustproof boss (4) expanding outwards is arranged at the outlet end of each inclined air hole. The utility model has the beneficial effects that: a redundant double-hole structure is adopted; symmetrical double holes ensure that the exhaust function is still maintained when a single hole is blocked, and the anti-blocking reliability is improved by more than 200%; by means of the gravity self-drainage principle, rainwater cannot flow back into a valve cavity along an inclined hole channel of the inclined air hole, the inclination angle is larger than the critical infiltration angle of liquid (usually lt: 30 degrees), and physical water prevention is achieved; the maintenance-free design is adopted, a traditional dustproof net is omitted, and the manufacturing cost is reduced by more than 20%; dust is difficult to deposit on an inclined hole wall due to the action of gravity, and the sensitivity of the diaphragm is kept at an initial value of 95% or above due to a dry and dust-free environment of a valve cavity.

The invention relates to the technical field of GIS dustproof sheds, in particular to a GIS dustproof shed which comprises a base cloth structure, an air column structure, an outer tarpaulin structure, a filter ring structure, a top suction detection structure and a splicing zipper. The bottom structure is arranged at the bottommost part, and the air column structure is arranged in the bottom structure; the outer tarpaulin structure is installed on the outer side face and the top face of the air column structure, and a door opening is formed in the side face of the outer tarpaulin structure. The filter ring structure is mounted on the periphery of the bottom end of the bottom structure; the top suction detection mechanism is mounted in the middle of the outer tarpaulin structure at the top; and the splicing zipper is arranged between the outer tarpaulin structure and the bottom structure.

The invention relates to the technical field of traditional Chinese medicine active component extraction and raw material medicine purification, in particular to a staged extraction and purification method of traditional Chinese medicine active component raw material medicine. Wherein the raw material medicine of the active component of the traditional Chinese medicinal materials is a matrine raw material medicine, and the preparation method comprises the following steps: S1, carrying out contact extraction on the matrine-containing traditional Chinese medicinal materials and an acidic ethanol aqueous solution to obtain a total alkaloid extracting solution; s2, obtaining a first-time segmented extraction solution; s3, obtaining a desalted enrichment solution; s4, obtaining a matrine fumarate crystal; s5, obtaining a matrine organic phase; and S6, obtaining the matrine bulk drug. By constructing a series purification technical scheme of ethanol-phosphate aqueous two-phase segmented enrichment, nanofiltration dialysis replacement desalination, fumaric acid selective salification crystallization, free alkali release extraction and displacement anti-solvent crystallization, segmented selective enrichment and purification of matrine in the total alkaloid extracting solution are realized.

The utility model provides a fully waterproof outdoor small-spacing LED display screen. The fully waterproof outdoor small-spacing LED display screen comprises a box body and a display screen body. The box body comprises a front mounting shell and a rear mounting shell, a high-definition tempered glass panel is mounted on the front side surface of the front mounting shell in an embedded manner, L-shaped protection plates are adhered to the two sides of the inner wall of the high-definition tempered glass panel respectively, and one end of each L-shaped protection plate is fixedly connected with the inner side wall of the front mounting shell; a partition shell is fixedly connected to the middle of the front side wall of the rear mounting shell, a buffer air cavity is formed between an inner cavity of the partition shell and the rear mounting shell, and the display screen is mounted in a display screen mounting cavity; the lower ends of the separation shell and the front installation shell are provided with air holes which correspond to each other up and down, an exhaust fan is installed at the upper ends of the air holes in the separation shell, and heat dissipation holes are formed in the front side wall of the separation shell. According to the outdoor small-spacing LED display screen, rainwater or water vapor is effectively prevented from directly entering the display screen from mounting gaps of the display screen box body, the moisture-proof performance and the heat dissipation performance of the box body are improved, the service life of the outdoor small-spacing LED display screen is prolonged, and resource waste is avoided.

The invention provides an access request verification method and device based on credentials, and relates to the technical field of data processing, and the method comprises the steps: receiving a credential application request initiated by a client; judging whether the credential application request meets a validity requirement, and if yes, sending the credential application request to a credential system; dynamically generating a user credential according to the credential application request, and forwarding the user credential to the client through the server; the client carries the user credential to initiate a resource access request to the server; forwarding the user credential to a credential system, verifying whether the user credential is valid, and if yes, obtaining an association rule set corresponding to the user credential; verifying the resource access request by using a rule engine, judging whether the resource access request meets the requirement of an association rule set, if so, passing the resource access request of the client under the constraint of a credential request, and recording an operation log; otherwise, refusing the resource access request.

The invention provides a bird nest image sending encryption system based on a distribution line, and relates to the field of data security transmission, images and parameter values in an information frame are subjected to block disassembly in an image analysis cloud, and then a to-be-reconfigured set fragment of a previous image is moved to a position corresponding to a next image, and the to-be-reconfigured set fragment of the previous image is subjected to block disassembly; therefore, the images are disordered and recombined; parameter value information is grouped into a plurality of different parameter information messages, the different parameter information messages are stored in different area windows according to the memory sizes of the different parameter information messages, and the messages are effectively protected based on the coding mode that the parameter information messages are mixed, disordered and recombined. According to the method, the received information frames are divided and grouped through the operation of block recombination, and different encoding encryption modes are adopted for different images and parameter values, so that the risk index of data is obviously reduced.

The utility model discloses a high flower bed of ecological drainage. The high flower bed of ecological drainage includes flower bed main part, filling system and overflow system. Flower bed main part has the groove of upper opening, filling system includes planting soil layer and support layer module, and planting soil layer fills in the groove, and support layer module is located below planting soil layer and is detachably connected with the groove, overflow system includes overflow pipe, grating cover plate and drain pipe, and the upper end opening of overflow pipe projects on the upper surface of planting soil layer and extends through the groove to the lower end, grating cover plate at least partially covers the upper end opening of overflow pipe, and drain pipe extends through support layer module and is provided with a plurality of through holes in the lateral wall. The present application can effectively intercept the larger volume sundries such as fallen leaves and branches. Reduce the risk of direct clogging of the pipeline by silt. Can be conveniently removed, without large-scale removal of planting soil.

The present application relates to the technical fields of chemical energy saving and equipment corrosion prevention, and particularly relates to a heat exchange device, which comprises a triple heat exchanger, a steam pipeline connected to an inlet of a shell side of the triple heat exchanger, a tube-and-shell heat exchanger, and an ethylbenzene atomizer, wherein an outlet of a tube side of the triple heat exchanger is connected to an inlet of a tube side of the tube-and-shell heat exchanger, an outlet of the tube side of the tube-and-shell heat exchanger is connected to a circulating water cooling system, an inlet of the shell side of the tube-and-shell heat exchanger is connected to an ethylbenzene feeding pipeline, an outlet of the shell side of the tube-and-shell heat exchanger is connected to an ethylbenzene discharging pipeline, the other end of the ethylbenzene discharging pipeline is connected to the steam pipeline, and the other end of the ethylbenzene discharging pipeline is connected to the ethylbenzene atomizer, and the present application has the following beneficial effects: the problems of the triple heat exchanger inlet being prone to corrosion and the equipment being also subjected to cavitation corrosion in the prior art are solved, the steam and circulating water consumption is reduced, the comprehensive utilization efficiency of heat energy is improved, and the production cost is reduced.

The application relates to a small sun heater with a built-in fan, which comprises a fixed frame, an air inlet grid installed on one side of the fixed frame, an air outlet grid installed on the other side of the fixed frame, a heating assembly installed on the air outlet grid, a reflecting cover arranged in the fixed frame and facing the heating assembly, and a fan assembly arranged in the fixed frame and used for blowing air towards the reflecting cover, wherein the fan assembly is provided with an air outlet channel, and the reflecting cover is provided with an air inlet structure communicated with the air outlet channel. The application has the effect of avoiding local overheating of the small sun heater caused by heat accumulation.

This invention discloses a film capacitor with dual electronic control including a power relay, EMC filtering, and heat dissipation device, belonging to the field of capacitor technology. The film capacitor includes a casing, an EMC filtering component, and a copper busbar assembly. The copper busbar assembly includes a first positive copper busbar and a second positive copper busbar, which connect two separate circuits into a dual electronic control circuit. This allows for more reliable logic control with simplified hardware, resulting in high sensitivity and good coordination for controlling subsequent equipment. After assembly, this capacitor reduces the number of electronic components, saving space. Furthermore, the centralized control logic reduces the number of fault points, making subsequent fault diagnosis easier and reducing energy consumption from redundant components.

The utility model discloses an automobile air conditioner air inlet box and an automobile, which comprise an air inlet box shell, an outer circulation air inlet, a first inner circulation air inlet, a second inner circulation air inlet, an air outlet, a first air door, a second air door, an actuator and a transmission mechanism, the transmission mechanism is matched with a rotating shaft of the first air door and a rotating shaft of the second air door, the actuator drives the transmission mechanism to drive the rotating shaft of the first air door and the rotating shaft of the second air door to rotate, and when the first air door is located at the first position and the second air door is located at the third position, the automobile air conditioner air inlet box is in an outer circulation mode. When the first air door is located at the first position and the second air door is located at the fourth position, the air inlet box of the automobile air conditioner is in an internal air compensation mode, and when the first air door is located at the second position and the second air door is located at the fourth position, the air inlet box of the automobile air conditioner is in an internal circulation mode. The internal and external air inlet ratio stability in an internal air compensation mode can be ensured, and the cost is reduced.

The utility model provides a multi-band router supported by a swan-gap system, and relates to the technical field of routers, the router comprises a router main body and a first line interface, one side of the surface of the router main body is provided with a cover plate installation groove, the side surface of the cover plate installation groove is provided with a first line connection pipe port, and the surface of the cover plate installation groove is provided with a positioning cover plate in a clamping manner. A circuit positioning arc groove is formed in the bottom surface of the positioning cover plate, a storage groove is formed in the top surface of the positioning cover plate, a display panel is hinged to the edge of the storage groove, a handle groove is formed in the outer surface of the display panel, and the surface of the positioning cover plate is matched with the display panel through the storage groove to carry out storage and online operation on articles. Auxiliary operation setting is directly carried out through the display panel, the router is folded and stored when not used, under the condition that the size of the original router body is kept unchanged, integrated operation of storage, control, dust prevention and line protection is achieved, operability is high, and daily use of the router body is facilitated.

The invention discloses a fluidized bed drying and granulating integrated unit which comprises a vibration bed body, an eccentric motor is arranged at the side end of the vibration bed body, a spring foot stool is installed at the bottom of the vibration bed body, a vibration plate is arranged on the vibration bed body, and the bottom of the vibration bed body is communicated with the vibration plate through external air supply equipment to supply air. The top surface of the vibration plate is of a smooth plane structure, a plurality of long flow guide plates are arranged on the vibration plate, the long flow guide plates are arranged at equal intervals, each long flow guide groove is provided with a ventilation channel, and the ventilation channels are formed in the side walls of the two ends of each long flow guide groove respectively. By optimizing the structural design of the vibration plate, the ventilation channel is arranged on the side wall of the flow guide long plate, and the detachable module plate and the flow guide baffle are matched, so that the technical problem that ventilation holes of an existing vibrated fluidized bed are easy to block is fundamentally solved.

The present invention relates to the field of artificial intelligence information security technology, and in particular to an artificial intelligence information processing method, the method comprising: allocating a simulated role with a corresponding authority range according to received user login information; receiving user access information; retrieving data corresponding to the access information in a database according to the access information; issuing an alarm prompt, issuing an interception prompt or turning on a defense mode according to the access information; tracking the access path information of the simulated role in a virtual host, determining that the simulated role belongs to a mis-retrieval or a vulnerability attack and repairing the vulnerability; building a next virtual host and entering virtual information; the present invention adopts the above method, by analyzing the received user access information, judging whether the information the user intends to access is within the user's authority range, and by counting the frequency of occurrence of sensitive words, effectively improving the accuracy of access information analysis, and further improving the security and practicality of artificial intelligence information processing.

The invention discloses a hazardous waste incineration tail gas purification treatment device, and relates to the technical field of flue gas purification. A first spiral partition plate and a second spiral partition plate are arranged in an inner shrinkage cavity of an inner shell, so that flue gas forms rotating airflow, and primary separation of particulate matter is achieved through the centrifugal effect; meanwhile, disturbance and local acceleration treatment are carried out on air flow in combination with the separation assembly, particulate matter is further separated from the air flow, and therefore a multi-stage separation mechanism is formed, the separation efficiency of the particulate matter in the hazardous waste incineration tail gas is remarkably improved, and the better separation effect on fine particles is achieved; the gas flows back to the inner shell and is discharged after being subjected to particle sedimentation in a low-speed area, so that particles are prevented from directly entering the exhaust pipe, meanwhile, residual particles in the backflow gas are secondarily intercepted by utilizing the matching effect of a movable column, a spring and a filter screen in the backflow assembly, particle accumulation is reduced through elastic vibration, and the exhaust efficiency is improved. Therefore, the re-entrainment phenomenon of particulate matters is effectively reduced.

The invention discloses a high-precision automatic assembly system for a magnetic core component, comprising a rotating stage, a carrier seat with a positioning hole is arranged on the rotating stage, a blade feeding device, a magnetic core feeding device, a magnetic core blade pressing device, and a magnetic core purging device are arranged along the rotation direction of the rotating stage, the blade feeding device is used to pick up the blade and place the blade at the bottom of the positioning hole; the magnetic core feeding device is used to horizontally feed the magnetic core with the correct orientation and adjust the magnetic core to a vertical state and place it in the positioning hole; the magnetic core blade pressing device presses the magnetic core and the blade downward; the magnetic core purging device has a sealing part and an air suction part, the sealing part is used to seal the positioning hole and the top of the magnetic core, and the air suction part is used to seal the bottom of the positioning hole and suck air; the invention can effectively ensure the correct orientation of the magnetic core while realizing fast and efficient assembly of the magnetic core and the blade, avoiding errors in the subsequent assembly orientation, and can blow out the slag inside the magnetic core to avoid the accumulation of slag inside the magnetic core.