49results about How to "Avoid hidden dangers" patented technology

The utility model provides a wave-shaped beam plate forming machining device which comprises a first machining area and a second machining area, and a supporting sliding part is arranged between the first machining area and the second machining area. A push plate moving towards the second machining area is arranged on the first machining area. Positioning columns are arranged at the two ends of the side, away from the first machining area, of the second machining area correspondingly, and the distance between the two positioning columns is smaller than the width of a steel plate used for producing the corrugated beam plate and larger than the width of the formed corrugated beam plate. The semi-finished product in the first machining area is pushed to the next machining area through the push plate, and then the corrugated beam plate can pass through the position between the two positioning columns by means of the width change of the bent semi-finished product, so that automatic feeding and discharging of the corrugated beam plate are completed. And meanwhile, hidden dangers to personal safety of workers due to the fact that hands or tools of the workers stretch into the machine in the operation process are avoided.

The application discloses a downhole multi-parameter logging device and belongs to the technical field of logging while drilling, comprising a drill collar, a battery module and a circuit module are respectively arranged at the two ends of the inner cavity of the drill collar and are axially fixed through locking modules, a metal centralizer is fixedly arranged in the inner cavity of the drill collar, a plurality of independent centralizing blocks are arranged at the center of the metal centralizer, the drill collar comprises a drill collar body, an antenna housing, a strip-shaped magnetic core and a coil, and stable signal transmission is guaranteed, the battery module comprises annular batteries and butterfly springs, can be replaced on site and has a damping function, the circuit module comprises resistivity, azimuth gamma and inclination measurement modules, is integrally designed and has strong anti-interference performance, the metal centralizer realizes self-adaptive centralizing through centrifugal force and hydraulic damping, and the independent centralizing blocks can compensate temperature errors, the device is stable in structure, is suitable for complex well conditions, is convenient to maintain and can realize accurate and synchronous measurement of multiple parameters, thereby providing reliable data support for logging while drilling.

The utility model relates to the technical field of oil well liquid drainage, in particular to a negative pressure liquid drainage device. Comprising an upper connector, a sealing conical surface is formed in the upper connector, the lower end of the upper connector is fixedly and hermetically connected with an outer cylinder, the lower end of the outer cylinder is fixedly and hermetically connected with a lower connector, a piston blind plate is arranged in the lower connector, connected with the lower connector through a shear pin and in sealed contact with the upper connector, and a screen pipe is fixedly and hermetically connected in the lower end of the piston blind plate. The lower end of the screen pipe extends to the position below the lower connector and is blocked. The screen pipe and the piston blind plate are automatically released through fracture of the shear pin, external power or manual intervention is not needed, instant communication of a shaft and an oil pipe column is achieved, and the liquid drainage starting time is remarkably shortened.

This invention discloses a crane safety operation control system and method based on machine vision and energy optimization management, belonging to the field of crane safety operation technology. Based on visual acquisition, this invention performs pre-operation benchmark calibration and dynamic data capture during operation, achieving full-cycle data traceability and synchronization based on timestamps. This clarifies the safety boundaries of the operation area and the initial state of the equipment, avoiding deviations and lags caused by data asynchrony, and ensuring the overall process is consistent and reliable. Visual data preprocessing eliminates external interference, and precise feature data is output using a safety benchmark model. Coupled with a tiered early warning mechanism, it accurately predicts operational anomalies and the risk of live intrusion and responds accordingly, achieving layered control of safety risks. By aligning visual data and operating parameters with timestamps to generate a fused dataset, and outputting safety levels and corresponding control signals through quantitative scoring, the objectivity and relevance of the assessment are improved, ensuring precise matching between control actions and safety states.

The utility model belongs to the technical field of nursing equipment, and discloses a Mongolian medicine tea and wine therapy treatment pad which comprises a water bag fixedly installed on a bed body, a partition layer is arranged in the water bag, the periphery of the partition layer is fixedly connected with the inner wall of the water bag, the water bag is divided into an upper space and a lower space, and the upper space and the lower space are arranged in the partition layer. An upper space formed by the water bag and the interlayer is filled with carbon dioxide gas, a lower space formed by the water bag and the interlayer is filled with water, the upper side and the lower side of the interlayer are respectively provided with a pipeline, and the pipelines are respectively communicated with the corresponding upper space and the corresponding lower space. In addition, the effect of treating fire can be achieved in time in the treatment process, and precautions are taken in advance.

The utility model discloses a connector for testing a compressed natural gas bottle, which comprises a compressed natural gas bottle body and a connector body which is in threaded connection with the interior of the upper end of the compressed natural gas bottle body and is used for detection, the left end of the connector body is in threaded connection with a first conversion connector, and the right end of the connector body is in threaded connection with a second conversion connector; a long pipe is integrally connected to the lower left end of the connector body, a notch is formed in the lower right end of the connector body, a lifting assembly capable of being limited is arranged on the upper side of the connector body, and the lifting assembly comprises a lifting ring, a threaded rod, a limiting plate, a limiting hole and a lifting hook. Connecting plates are fixedly connected to the upper end of the connector body in a front-back symmetrical mode, mounting blocks are connected to the outer ends of the connecting plates in an embedded mode, and waterproof springs are fixedly connected into the mounting blocks. The connector for testing the compressed natural gas cylinder is convenient to install and prevents falling off during testing, the tested gas cylinder can be conveniently hoisted, falling off during hoisting is prevented, and meanwhile hidden dangers during water injection are prevented.

The present application relates to the technical field of electrical system design, and particularly relates to a spacecraft electrical system interconnection component path planning optimization method and system. The method comprises the following steps: obtaining interconnection component data; constructing adjacency relationship according to the interconnection component data to obtain component adjacency data; selecting a beam splitting point according to the component adjacency data to obtain beam splitting point data; estimating point port cost of the beam splitting point data to obtain point port cost data; generating a control linkage graph according to the component adjacency data to obtain control linkage graph data; generating an interpretation field according to the control linkage graph data to obtain interpretation field data; determining the splitting benefit of the point port cost data and the interpretation field data to obtain splitting benefit data; and evaluating the hard constraint of the splitting benefit data to obtain beam splitting point feasibility evaluation data. The present application realizes the constraint of the beam splitting point position and the control semantics, effectively avoids the cross-stage control reversal and redundancy failure problems.

The utility model relates to a falling film type indirect liquid cooling system which comprises a cooling tower, a cooling pump, a plate heat exchanger, a freezing pump, a negative pressure hot gas condensation treatment liquid storage tank, a falling film type indirect liquid cooling unit and a controller, the liquid inlet end of the falling film type indirect liquid cooling module communicates with a liquid outlet of the freezing pump, a liquid inlet of the freezing pump communicates with a hot end outlet of the plate heat exchanger, and a hot end inlet of the plate heat exchanger communicates with a liquid outlet of the negative pressure hot gas condensation treatment liquid storage tank. A gas inlet of the negative pressure hot gas condensation treatment liquid storage tank is communicated with a gas outlet end of the falling film type indirect liquid cooling module, a cold end inlet of the plate heat exchanger is communicated with a liquid outlet of the cooling pump, a liquid inlet of the cooling pump is communicated with a liquid outlet of the cooling tower, and a liquid inlet of the cooling tower is communicated with a cold end outlet of the plate heat exchanger. The whole result is simple, water is used for replacing electronic fluorinated liquid to serve as a liquid cooling working medium, and the problem of liquid leakage can be effectively solved.

The utility model belongs to the technical field of battery top covers, and mainly relates to a battery top cover which comprises a cover plate and a sealing assembly, the cover plate is provided with a step part for assembling the sealing assembly and a liquid injection hole for assembling a plastic nail along the thickness direction of the cover plate, and the sealing assembly comprises a first sealing nail and a second sealing nail; the step part comprises a first step and a second step fixedly connected with the first step, and a first cavity for assembling the first sealing nail is formed in the first step in a surrounding manner; a second cavity for assembling a second sealing nail is arranged around the second step; the first step is fixedly connected with the liquid injection hole, the first sealing nail is provided with a first body part and a first extending part extending in the thickness direction of the first body part, and the first extending part is welded to the first step; according to the battery top cover, the air tightness can be remarkably improved, and the risk of electrolyte leakage is effectively reduced.

The utility model discloses a LED street lamp, its technical key point scheme includes casing, light -transmitting cover, sealing washer no.

This invention relates to the field of medical device technology, and in particular to a negative pressure drainage device for various chronic wound exudates. It includes a disposable drainage bag, a dressing, and a frame for connecting the disposable drainage bag and clamping it onto a hospital bed. It also includes a micro-negative pressure drainage drive unit located on the bottom side of the clamping unit to generate negative pressure inside the disposable drainage bag; and a fastener, a threaded structure, installed at the bottom of the frame, which is also connected to a moving plate via a transmission component. Through the cooperation of the fastener, transmission component, and moving plate, the micro-negative pressure drainage drive unit organically integrates the frame fixing operation with the negative pressure generation process. When the fastener is tightened and fixed to the hospital bed, it simultaneously drives the moving plate to reset and applies tension to the fixing spring, causing the first clamping plate to displace away from the second clamping plate, thereby pulling the drainage bag to form an outward expansion deformation, creating a continuous and stable micro-negative pressure environment inside the bag.

This application discloses a method for processing an embedded packaging substrate and the embedded packaging substrate itself, comprising: providing a carrier substrate; fabricating a first circuit layer on the surface of the carrier substrate, the first circuit layer including FC pads; obtaining a second substrate; depositing a first laminated insulating film on the side of the second substrate having the first circuit layer; exposing, developing, and curing the first laminated insulating film to form a first blind trench, the first blind trench corresponding to the position of the FC pads; fabricating a second circuit layer on the side of the second substrate having the first laminated insulating film; depositing a second laminated insulating film on the side of the second substrate having the second circuit layer; exposing, developing, and curing the second laminated insulating film to form a second blind trench, the second blind trench corresponding to the position of the first blind trench. The purpose of this application is to solve the problems of reduced production efficiency, increased costs, and residual carbides at the edges of the pads caused by using laser technology to fabricate blind trenches in the prior art.

The invention discloses an electromagnetic shielding-based layered wiring structure with a main manipulator easy-to-disassemble design. The structure comprises a structural member serving as a supporting framework and an easy-to-disassemble shell detachably mounted on the outer side of the structural member, and the structural member and the easy-to-disassemble shell are matched to form a wiring space; a guiding shielding piece is arranged in the wiring space and divides the space into at least two physical levels, and the guiding shielding piece is used for guiding different types of main wire harnesses to conduct layered wiring and achieve electromagnetic shielding. In addition, a first closed space formed by a fixing plate and an electromagnetic shielding cover is arranged in the base frame so as to contain a control element, and the tail end holding rotation mechanism guides the cable to be arranged in a split mode through the wiring open groove and the axial channel. According to the invention, electromagnetic crosstalk is effectively inhibited through layered shielding wiring, and the signal precision is improved; the maintenance process is simplified by utilizing the easy-to-disassemble shell; and through a scientific wiring path, the abrasion and shearing risks of the cable under complex movement are prevented, and the reliability and durability of the main manipulator of the surgical robot are remarkably enhanced.

This utility model discloses a vacuum blood collection tube capping device, including a base and a fixed seat located on top of the base. The top of the fixed seat has a placement groove for placing vacuum blood collection tubes, and a limiting mechanism for reinforcing the vacuum blood collection tubes is provided within the placement groove. Symmetrically arranged columns are located on the top of the base and on one side of the fixed seat. A connecting plate is provided on one side of each set of columns, and a capping plate for capping the vacuum blood collection tubes is located below the connecting plate. The capping plate is connected to the connecting plate via a reciprocating mechanism. This mechanized structure replaces the original manual operation, significantly shortening the processing time, improving the product qualification rate, and greatly reducing labor costs. The limiting mechanism can limit the vacuum blood collection tubes placed in the placement groove, preventing displacement of the tubes during capping, further improving the product qualification rate.

This invention belongs to the field of ceramic equipment manufacturing technology, and discloses a metallized ceramic shell for a vacuum interrupter and its processing technology. The process uses low-sodium α-alumina with 0.5~1μm grain size as raw material, and acid washing improves its chemical purity and grain boundary stability. During granulation, the moisture content is controlled to ≤0.1%, and homogenization is used to remove iron and eliminate conductive impurities. A drying process is added between pressing and turning to improve processing precision. Through programmed temperature sintering combined with atmosphere control, the crystal structure is optimized and organic matter and gases are expelled, avoiding closed pore defects. After firing, polishing reduces surface roughness and prevents dust adsorption and conductivity. The glazing process uses bentonite and silica to adjust the glaze viscosity, ensuring uniform glaze coverage and matching the thermal expansion of the ceramic body, improving the outer surface insulation performance. The synergistic effect of each step comprehensively improves the purity, density, and surface quality of the ceramic shell, effectively meeting the stringent insulation strength requirements of high-voltage vacuum interrupters.

This invention relates to the field of hydrological and water resources monitoring technology, and discloses an intelligent monitoring device and method for hydrological and water resources assessment, comprising: a floating base, a sensor assembly, a lifting assembly, and a control terminal; the sensor assembly includes a water quality monitoring unit and a protective cover fitted over the outside of the water quality monitoring unit; the lifting assembly is disposed at the bottom of the floating base and includes a linear guide rail fixedly installed at the bottom of the floating base, a lifting slide mounted slidably on the linear guide rail, and a traction drive component for driving the lifting slide to move linearly up and down along the linear guide rail. The monitoring device of this invention intelligently identifies and locks onto the optimal water layer, reducing the adhesion and contamination of the sensor assembly by silt and algae in the water through proactive pollution avoidance. Furthermore, it eliminates the need for additional active cleaning components; it can be achieved simply by configuring corresponding control logic on the existing lifting mechanism, without increasing the complexity of the equipment structure or raising maintenance costs.

The utility model relates to the technical field of coal charging cars, in particular to a tamping coal charging car rear baffle locking device which comprises a tamping coal charging car, the tamping coal charging car comprises a rear baffle and a coal supporting plate, the rear baffle is arranged at one end of the coal supporting plate, a locking rod is hinged to the top of the coal supporting plate, a first positioning block is arranged at one end of the locking rod, and a second positioning block is arranged at the other end of the locking rod. A locking rod is arranged at one end of the tamping coal charging car, a balancing weight is arranged at the bottom of the other end of the locking rod, a second positioning block is arranged on the rear baffle, the first positioning block is connected with the second positioning block in a clamped mode, a limiting plate is arranged at the tail of the tamping coal charging car, and an elastic pressing roller is arranged at the tail end of the limiting plate and located above the locking rod. According to the utility model, the locking rod is matched with the elastic compression roller, so that the rear baffle plate is locked and opened completely through a mechanical structure, the working reliability is improved, and the production efficiency is improved.

The application provides a kind of based on fuzzy preview and long press unlocking after reading multimedia content processing method, belongs to instant messaging and data security field technical field;In the sending end, the target content is uniformly identified, and is transmitted to the receiving end through an end-to-end encryption channel.The receiving end enters the safe preview mode after analyzing the message, and the content is blurred or covered;The user needs to long press in the specified transition time to gradually remove the protection, and can enter the clear state.In the clear state, the system starts the destruction timer, supports timed and immediate destruction;At the same time, it contains local peek mode and panoramic safety mode, and suppresses shooting and transmission.In the receiving end, the return receipt with digital signature is returned after the destruction is completed.The application can maintain good user experience while significantly improving the security and reliability of the after-reading-burning function for pictures, text and videos, and has wide application prospect.

The application discloses a container detection method, system and device based on machine vision and a storage medium, relates to the technical field of containers, and comprises the following steps: obtaining colored detection parts and non-colored detection parts based on a seven-item inspection method of containers; building an external contour model; performing one-time filling on the external contour model based on machine vision; obtaining a virtual container model; and identifying defects of the container based on the virtual container model. The application is used for solving the problem that, in the existing container detection method, when there are defects inside the container or defects in the blind area of the container outside, the defects cannot be detected in a targeted manner, and after the defect parts are obtained, the identification of the defects is relatively fuzzy, thereby affecting the maintenance of the management personnel and the use of the container.

This invention discloses a digital twin-based intelligent slip ring health management method and system, relating to the field of electromechanical systems technology. The method includes: acquiring a twin model based on digital twins; acquiring twin simulation parameters and obtaining fault evolution links based on fault simulation results; using link analysis to obtain fault management methods; and performing health management on the intelligent slip ring based on the latest fault management methods corresponding to real-time management faults. This invention addresses the problem that existing intelligent slip ring health management methods cannot analyze fault chains, leading to an inability to effectively predict and manage potential hazards caused by faults. This results in only passive monitoring and post-event remediation of faults, without the ability to proactively predict faults, thus causing false alarms and missed alarms.

An outer spring pump core relates to the technical field of pump cores and is used for solving the problems of material body pollution and accidental leakage caused by built-in spring. The pump core sleeves the spring outside the upper pressing rod to isolate the spring from the contact channel of the material body. The pump core comprises the upper pressing rod, the outer spring, the connector, the piston rod, the connecting rod, the body and the valve piece. The outer spring is installed between the upper pressing rod and the connector, and the connector is fixed to the body. The side wall of the connecting rod is provided with two channels, and the axis of the channels and the axis of the connecting rod form an included angle of 15°. The limiting assembly is composed of a limiting vertical rod and a limiting hole. The rotation of the limiting vertical rod can lock the position of the upper pressing rod to prevent accidental pressing. The pump core is suitable for cosmetic and food bottles, reduces the pollution risk, avoids leakage and prolongs the service life.

The invention relates to the technical field of constructional engineering, in particular to an ultrahigh light composite partition wall system with the fire endurance larger than or equal to 5 h and a construction method thereof.According to the system, a 200 mm composite wall core is formed by clamping calcium silicate fireproof plates between double-layer foamed ceramic battens, and the exterior of the composite wall core is coated with an expansion type fireproof coating; the steel structure joints are connected in a composite mode through U-shaped clamps and fireproof glue, and the steel beams and the steel columns wrap fireproof plates and are sprayed with fireproof coatings. Constructional columns are arranged on the wall body with the length larger than or equal to 6 m, and vertical connecting plates are arranged twice; the normal-temperature, soaking and compression-shear strength of the special fire-resistant rubber is greater than or equal to 1MPa. Standardized construction comprises the steps of paying off, steel structure installation, U-shaped clamp fixing, single-side batten installation, fireproof plate embedding, other-side batten installation, correction, steel structure fireproof coating, joint sealing and acceptance inspection. The ultrahigh light composite partition wall system and the construction method thereof have the characteristics that the fire-resistant integrity is larger than 300 min, the surface density is smaller than or equal to 600 kg / m < 2 >, and no crack exists when a single wall reaches the top by 9 m at a time, can be widely applied to first-level fire partitions of museums, data centers and the like, and are light, high in strength, fast to mount and low in comprehensive cost.

The utility model discloses a kind of hot box replacement support devices on elasticizer, it is related to chemical fibre machinery technical field, its technical key points include stand, footing, crossbeam and electric hoist, the stand and footing are two, two the stand is spaced distribution, two the footing is fixedly connected in stand lower end respectively, the crossbeam is fixedly installed in stand upper end, the electric hoist is installed in crossbeam, and the both ends of the crossbeam are fixedly installed with inclined strut between two stands respectively. Technical effect is by setting support, can replace forklift to work, solve the hidden danger of forklift operation, reduce the time and labor of removing walkway board, original silk frame, herringbone beam support, end pipeline, staircase, guardrail etc. when replacing hot box, optimize operation process, reduce the time and labor, improve production efficiency.

This utility model discloses a respiratory spray device, relating to the field of respiratory medicine technology. It includes a nebulizer body with a limiting cap snapped onto its top. A limiting device is threaded onto one side of the limiting cap, and a mist outlet is fixedly connected to the side of the nebulizer body. Through the design of a filter and filtration components, this utility model achieves purification and safety during operation. The filtration components accurately intercept impurities mixed with the medication from the outside, such as airborne dust, fibers, and tiny foreign objects that may be introduced when the medicine bottle is opened, ensuring extremely high purity of the medication injected into the nebulizer body and preventing impurities from interfering with the nebulization effect. The organic cotton filter inside the filter deeply filters any remaining un-nebulized droplets and fine impurity particles in the mist after nebulization, effectively removing components that may irritate the respiratory mucosa and significantly reducing patient discomfort when inhaling the mist.

This utility model provides an outdoor rainproof cap structure for a power distribution cabinet, belonging to the field of distribution cabinet safety. It includes a distribution cabinet body, with a rainproof cap assembly installed on the top of the body for rain protection. The rainproof cap assembly is equipped with components to prevent water, snow accumulation, and vibration. This utility model, through the design of the rainproof cap assembly, hollow heat dissipation strips, heat dissipation holes, and drip edges, effectively prevents water and snow accumulation on the triangular top cover during use. Two mounting plates facilitate the installation of the top cover. The hollow heat dissipation strips dissipate heat from the inside of the distribution cabinet body. The staggered heat dissipation holes prevent insects and other small animals from entering the cabinet, avoiding potential hazards. The drip edge design guides rainwater to drip quickly without spreading along the cabinet surface.

The invention provides a direct current submerged arc furnace electrode intelligent voltage release fuzzy control method and system, and relates to the technical field of fuzzy control, and the method comprises the following steps: collecting the temperature value of a electrode roasting core area and the temperature of a hearth; calculating an electrode roasting comprehensive temperature value according to the contribution degree weight of electrode roasting; obtaining a temperature deviation and a temperature deviation change rate according to the electrode roasting comprehensive temperature value and a set temperature; fuzzifying the temperature deviation and the temperature deviation change rate to obtain the fuzzy quantity of the temperature deviation and the fuzzy quantity of the temperature deviation change rate; performing fuzzy reasoning on the fuzzy quantity of the temperature deviation and the fuzzy quantity of the temperature deviation change rate to obtain a fuzzy output quantity; counting the accumulated number of times of timing according to minutes after the electrode pressure is released; and when the accumulation frequency is greater than or equal to the fuzzy output quantity, completing one-time voltage release action on the electrode. The system and the method are simple and compact in structure and stable and reliable in detection, and can effectively avoid fault hidden dangers caused by complex structures.

The utility model relates to the technical field of bathroom accessories, in particular to an easily-mounted trap device of a split squatting pan. Comprising a trap, a water inlet connector and a water outlet connector are arranged at the two ends of the trap respectively, a connecting pipe is arranged at the water outlet connector and comprises a first pipe body and a second pipe body, the first pipe body is connected with the water outlet connector, and the inner diameter of the second pipe body is larger than that of the first pipe body. The first pipe body and the second pipe body are connected through a reducing pipe. The device provided by the utility model can solve the problem that the trap is not matched with the pipe diameter of the blow-off pipe, is convenient to install and easy to operate, enables the trap to be firmly connected with the blow-off pipe, and ensures the stable operation of a drainage system.

The utility model discloses an environment monitoring device for a cubicle gas insulated switchgear production workshop. The environment monitoring device comprises a terminal node, a routing node, a wireless sensor network coordinator, a gateway and a remote monitoring computer, the terminal node, the routing node, the wireless sensor network coordinator, the gateway and the remote monitoring computer are connected in sequence; the terminal node is used for receiving an instruction sent by the coordinator and collecting environment information; the routing node is used for forwarding data information of the child node managed by the routing node; the coordinator is used for establishing and managing a wireless sensor network, receiving data transmitted by the acquisition nodes and sending a command to the acquisition nodes; the gateway is a communication bridge between the wireless sensor network and the Ethernet and is used for realizing protocol conversion and data transfer among different networks; and the remote monitoring computer is used for displaying the environmental parameters of the production area. The utility model has the advantages of simple structure, convenience for mastering the environment parameter change condition in the production process in real time, and the like.

The present application relates to coal seam permeability enhancement technical field, and disclose a kind of hydraulic mechanical cavitation device for coal seam permeability enhancement and use method, comprising: rack, the rack is slidably installed with step module, hydraulic machine is slidably installed on the step module;The output end of the hydraulic machine is threadedly connected with first drill rod, the first drill rod is threadedly connected with second drill rod at one end away from the hydraulic machine, and drill-in assembly is connected at the end of the second drill rod away from the first drill rod;Expanding hole assembly is arranged in the second drill rod.By the cooperation of drill-in assembly and driving mechanism, drill bit can be drilled by mechanical impact, and the technical effect of permeability enhancement and cavitation is achieved.Compared with high-pressure water driving technology, the use of mechanical impact has the advantages of accurate control and stable operation, and also avoids the gas gushing, hole plugging and equipment hazards existing in hydraulic permeability enhancement.

The invention provides a nozzle for wafer drying and a wafer drying device.The nozzle comprises a nozzle shell, a gas distributing block and a nozzle core, and a center flow dividing runner and an edge flow dividing runner are arranged in the gas distributing block so that nitrogen entering from a center gas inlet pipe and nitrogen entering from an edge gas inlet pipe can be divided; a plurality of air uniformizing structures for uniformizing nitrogen entering the nozzle core are arranged in the nozzle core; the wafer drying device comprises a wafer clamping device, an inert gas supply device and a replacement liquid supply decoration. According to the invention, the uniformity of the flow velocity when the nozzle sprays nitrogen is effectively improved, so that the nitrogen above the wafer is distributed more uniformly, and the wafer and air can be better isolated.