68results about How to "Help replace" patented technology

The invention discloses a synchronization measurement device for a wall-adherent jet speed field and a concentration field, consisting of a coal-powder boiler modularized device, an oxygen sensitive coating wall surface, a high speed CCD camera, a PIV camera, a high intensity excitation light source, a pulse laser sheet light source, an uniform mixing chamber, a synchronization controller and a computer. The PIV camera is utilized to shoot the flowing track of PIV particles in a main air flow in the wall-adherence jet, the high speed CCD camera is utilized to shoot the color rendering rule of the oxygen sensitive coating wall surface along the change of the oxygen concentration in the jet, and the synchronization measurement of the speed field and the concentration field in the process of mutual interaction of the wall-adherence jet and the main flow is realized through the controller regulating and controlling the interval frame working mode between the PIV camera and the high speed CCD camera. . The invention realizes the synchronization measurement in the process of air-air mutual interaction, which not only obtains the turbulence flowing characteristics of the wall adherence jet, but also obtains component transportation characteristics of the specific component in the jet air. The invention benefits the comprehensive understanding the convection movement of the jet air and the diffusion process, and provides reference to the optimization design and the operation parameter of the nozzle.

The invention discloses a photovoltaic panel mounting structure, which comprises a photovoltaic panel assembly and a support assembly, wherein the photovoltaic panel assembly comprises a support plate; the upper end surface of the support plate is provided with a plurality of parallelly-distributed grooves; each groove is internally embedded with a plurality of photovoltaic panels distributed along the groove length direction; the side wall of each groove is provided with a folded edge extending towards the middle part of the groove for pressing the photovoltaic panel; the support assembly comprises a bottom plate; one end of the bottom plate is hinged with one end of the support plate; a motor is fixed on the bottom plate; the output shaft of the motor is connected with a screw rod; two ends of the screw rod are in rotating connection with a pair of bearings fixed on the bottom plate; a sliding block is in screw connection onto the screw rod; the bottom plate is provided with a sliding rail; the sliding block is connected onto the sliding rail in a sliding mode; a support rod is hinged at the back part of the support plate; and one end, far away from the support plate, of the support rod is hinged with the sliding block. The photovoltaic panel mounting structure has the advantages that the mounting efficiency is high; the maintenance and the repair are convenient; and the angle formed between the photovoltaic panel and the sunlight can be flexibly adjusted.

The invention discloses a method for determining degradation rate of raw materials in a fermentation bed padding, comprising the following steps: crushing and drying a raw material sample to be measured, weighing and recording the weight as W1; drying and weighing a window screen bag, and recording the weight as W2; putting the processed raw material sample into the window screen bag, and tightening the opening of the window screen bag; turning over the fermentation bed padding, laying the window screen bag with the opening being tightened flat 23-32cm deep inside the fermentation bed padding, laying the window screen bag flat; backfilling the fermentation bed padding, letting live pigs move on the fermentation bed padding; taking out the window screen bag after seven days, rinsing the removed window screen bag clean in distilled water, drying, weighing and recording the weight as W3; and calculating the degradation rate of the sample through a formula of ''(W1+W2-W3) / W1*100=degradation rate of the sample''. According to the invention, the degradation rate in the padding is determined by a window screen bag method. The sample to be measured in the window screen bag is contacted with the fermentation bed padding without any distance, and the real degradation rate of the sample in the padding is obtained.

The invention relates to a method, device and equipment for adaptive addressing and addressing, a storage medium and a display system. The invention discloses a method for adaptive addressing and addressing, which comprises the following steps of: in response to a received first addressing instruction sent by a controller, sending a second addressing instruction to a cascaded slave unit cascaded with a host by each host in a parallel master unit according to a preset addressing mode in the first addressing instruction so as to carry out addressing; enabling each host in the parallel master unit to determine the number of slaves loaded by each host based on a feedback instruction from the cascaded slave unit cascaded with the host; and in response to a received addressing instruction sent by a controller, the parallel master unit performs master addressing step by step according to the determined number of the plurality of slaves and a predetermined addressing mode in the addressing instruction.

The invention discloses an edge and corner rounding device for mold processing. The edge and corner rounding device comprises an operating rod. A connecting rod groove is formed in the bottom of the operating rod. A connecting rod is mounted in the connecting rod groove in a sliding manner, and the bottom end of the connecting rod extends out of the connecting rod groove. A rounding machine head is fixedly mounted at the bottom of the connecting rod. A groove is formed in the side wall of one side of the connecting rod groove. A fixing rod is mounted in the groove in a sliding manner, and oneend of the fixing rod extends out of the groove. The side, close to the groove, of the connecting rod is provided with a fixing groove. The fixing rod is connected with the fixing groove in a slidingmanner. The side, located inside the groove, of the fixing rod is provided with a first rotating shaft groove. A first rotating shaft is rotatably mounted in the first rotating shaft groove, and one end of the first rotating shaft extends out of the first rotating shaft groove. The edge and corner rounding device is simple in structure and convenient to use; the rounding machine head (4) can be dismounted and mounted rapidly; operation is easy to conduct; the time is saved; people can replace the rounding machine heads of different sizes conveniently; and production efficiency is improved.

The invention discloses a flashlight polishing device, and relates to the field of machining. The flashlight polishing device comprises a main motor, a support, an air cylinder, an auxiliary motor, a sanding disc, a clamping mechanism and a working table. According to the flashlight polishing device, through the structural design, flashlights different in size are polished, and polishing is more sufficient; and meanwhile, the clamping mechanism is arranged, so that the flashlights are not prone to swinging during polishing, and polishing is more stable and even.

The invention relates to a multifunction drawing board comprising a drawing board, a pen container, big clamps, small clamps, a steel wire ring, a supporting board, a strap, a rope, and the like which are all connected into a whole. Painting brushes, pencils, erasers, pen knives, paper, and the like can be placed in the multifunction drawing board. The big clamps are fixed at the periphery of the front side of the drawing board, and the small clamps are fixed at the back side of the drawing board, wherein octavo is clamped on the front side, and A4 paper is clamped on the back side; the pen container is embedded into a groove at one end of the board; the steel wire ring penetrates into left and right ends at the top of the board and is used for tying the strap and covering the supporting board fixing parts; both left and right ends at the top of the supporting board are provided with two holes and are sheathed into the steel wire ring of the drawing board; and the left and the right ends at the top of the supporting board can rotate forwards and backwards to realize the function of supporting both sides. The rope is used for inclining the drawing board.

The invention relates to an assembly type green belt structure and a construction method thereof. The assembly type green belt structure comprises a rectangular foundation, wherein the length of the transverse side of the foundation corresponds to the width of a green belt; corner columns are arranged at the four corners of the foundation, and edge columns are correspondingly arranged at the opposite sides of the foundation; longitudinal plates are respectively connected between the edge columns as well as between the edge column and the corner column; water guide pipelines are arranged at theupper part, corresponding a pavement position of the road structure, of each longitudinal plate and are used for guiding the water at the pavement into the green belt; water drainage holes are formedin the lower part, corresponding to an underground water drainage system of the road structure, of each longitudinal plate and and are used for draining water; a transverse plate is connected betweenthe adjacent corner columns in the transverse direction, and a transverse separating plate is arranged between the adjacent edge columns in the transverse direction; a hole for water passing is formed in the transverse separating plate; a cover plate is overlapped between the top parts of the longitudinal plates at the opposite sides of the foundation. The assembly type green belt structure solves the technical problem of failure to realize quick dredging and drainage due to short-term strong rainfall and rainstorm in the traditional green belt structure.

The invention discloses a plate type membrane module which comprises two oppositely arranged diaphragms and an inner support body arranged between the two diaphragms, wherein the inner support body comprises a first frame body and a first mesh body bridged at opposite inner sides of each side edge of the first frame body; the two diaphragms are connected with the first frame body in a sealing manner and are respectively located on both sides of the first mesh body; the plate type membrane module further comprises two outer support bodies respectively located on both sides of the inner support body; the outer support bodies comprise second frame bodies and second mesh bodies bridged at opposite inner sides of each side edge of the second frame bodies; the second frame bodies are connected with the first frame body in a fastening manner and enable the diaphragms to be located between the first mesh body and each of the second mesh bodies; a liquid outlet communicated with a cavity between the two diaphragms is formed in at least one side of the first frame body; clear liquid formed after a stock solution sequentially penetrates through the second mesh bodies and the diaphragms is converged in the cavity and is discharged from the liquid outlet.

The invention discloses an intelligent engraving device for collecting wood chips for wood tools, and relates to the technical field of timbers, in particular to the intelligent carving device for collecting the wood chips for the wood tools. The device comprises a water storage tank, a connecting rod and a pulling rod, the connecting rod and the pulling rod are fixedly connected, and the verticalcenter line of the water storage tank is perpendicular to the pulling rod; the device is characterized in that a water pipe is installed above the water storage tank, a curved rod is installed at thefront end of the water pipe, the connecting rod is internally provided with a pin shaft, the connecting rod is located above the curved rod, and the curved rod is in pin connection with the connecting rod through the pin shaft. According to the intelligent carving device, the water inside the water storage tank can be effectively supplied to a water outlet through the cooperation between the water pipe and a buffer tank, the water outlet is used for cleaning an object after the craving is completed to prevent waste debris on the surface of the object from moving down and falling, and a locking screw rod can effectively help a user to overhaul or replace the water outlet to ensure the smooth water flow of the water outlet.

A device (1) for feeding self-adhesive or "pressure sensitive" labels to a labelling machine comprises a frame (2) and supporting means (3) comprising a supporting plate (17) for supporting a reel (4) of web (5) with labels applied to it, and also comprises at least one guide element (28, 29) designed to be at least partly inserted in a central hole (7) of the reel (4) which can rotate about it. The device (1) also comprises a detaching station (8) for detaching the labels from the web (5), feeding means (9) for feeding the web (5) to the detaching station (8) and recovery means (10) for recovering the web (5) without labels. The supporting plate (17) is removably associated with the frame (2) and the supporting means (3) also comprise a containment head (30) switchable between an open configuration, in which it allows the coupling with and uncoupling from the frame (2) of the supporting plate (17), with the reel (4) placed on it, and an operating configuration, in which it allows the reel (4) to be held between itself and the supporting plate (17), allowing reel (4) rotation.

The invention discloses a same-cavity integrated vertical walnut shell high-speed multi-stage superfine grinding device and method. The same-cavity integrated vertical walnut shell high-speed multi-stage superfine grinding device comprises a double-channel sliding type feeding device and a same-cavity integrated vertical grinding device body, the same-cavity integrated vertical crushing device body comprises a material raising disc and a same-cavity integrated vertical crushing barrel body, a first-stage coarse crushing area, a second-stage fine crushing area, a third-stage pneumatic impact micro-crushing area and a fourth-stage jet mill superfine crushing area are arranged in the same-cavity integrated vertical crushing barrel body, walnut shells falling through the double-channel slidingtype feeding device are evenly raised into a wedge-shaped gap of the first-stage coarse crushing area through the material raising disc to be coarsely crushed, the second-stage fine crushing area achieves fine crushing on the coarsely crushed materials through a two-stage wedge-straight-through gradually-shrinking gap, the third-stage pneumatic impact micro-crushing area impacts the walnut shellfine crushed particles at a high speed, the walnut shell fine crushed particles are impacted and violently rubbed under carrying of high-speed airflow to be crushed, in the four-stage jet mill superfine grinding area, micro-particle grading is achieved through arc-shaped blades, and micro-particles meeting the particle size condition are sucked out through negative pressure attraction.

The invention discloses a horticultural plant three-dimensional cultivation device with a drip irrigation system, and relates to the technical field of horticultural plant cultivation. The horticultural plant three-dimensional cultivation device with the drip irrigation system comprises a three-dimensional cultivation frame, at least one cultivation tank and a drip irrigation system; each cultivation tank is installed on the three-dimensional cultivation frame, a beam tube frame is fixed to the top of each cultivation tank, and a partition plate is installed in each cultivation tank; and the drip irrigation system is installed at one side of the three-dimensional cultivation frame. According to the horticultural plant three-dimensional cultivation device, through the arrangement of a recycling mechanism, particularly through a filtering assembly composed of a filtering plate and a filtering net, a water body can be filtered; and recycling of water resources can be achieved through thearrangement of a backflow pipe, a recycling box and a circulating pump, so that the utilization rate of the water resources is effectively improved, the waste of the water resources is avoided, the cost of plant cultivation is reduced, and the economic benefit of plant cultivation can be increased.

The invention discloses a VOCs treatment system by centrifugal oxidation method combined with micro-nano bubbles. The system comprises a centrifugal separation and desorption device, which is provided with a first air inlet pipe, a first water inlet pipe, a first drain pipe and a first exhaust pipe. The first air inlet pipe is connected to a VOCs gas source; the first water inlet pipe is connected to a micro-nano bubble ozone generator; the first drain pipe is connected to a purified water tank; and a defoaming device, a drying desorption cabinet, a UV microwave photo-oxidation catalytic purifier, an exhaust gas destroyer, a draught fan and an uptake ventilator are successively connected at the back of the first exhaust pipe. According to the invention, the dust removal effect, oxidation effect and oxidation efficiency of VOCs gas can be promoted; gases generated by the device for treating the VOCs gas are also treated while the VOCs gas is treated, and new pollutants will not be generated. The system is environmentally-friendly.

A light emitting diode, LED, strip (301) for the illumination of channel signs is provided. The LED strip comprises a flexible circuit board, a plurality of LEDs mounted on the circuit board, and an electrical connector for connecting the LED strip to a power supply. The LED strip is at least in part encapsulated by a flexible resin such that the LED strip is foldable. The LED strip according to the present invention is advantageous in that its length can be adjusted by folding instead of cutting, thereby retaining the waterproof encapsulation of the LED strip. Further, a method for mounting a flexible LED strip (301) in a channel sign is provided. The method comprises the steps of attaching at least one clip (302) to an interior surface (303) of the channel sign, folding back an end (304) of the LED strip, and fixating the LED strip including the folded end using the clip. The method according to the present invention is advantageous in that it provides an easier and more reliable mounting of a LED strip as compared to standard prior art techniques.

The invention discloses a new energy vehicle battery bin structure being convenient to quickly replace a power battery, comprising a vehicle body and a battery arranged on one side of the vehicle body, wherein one side of the vehicle body is provided with a battery slot for mounting a battery, and one side of the battery cover is rotatably connected with the vehicle body, and the other side of thebattery cover is connected with the vehicle body through a locking buckle. The side wall of the battery slot is provided with a dismounting avoidance hole, and the mouth part is provided with a locking screw hole for connecting the battery, and the bottom part is provided with an anti-collision pad. The invention is novel in design, simple in structure and convenient in use, can replace the battery quickly by using a battery replacement station, reduces a lot of time wasted by the vehicle owner due to charging, greatly increases the range of the electric vehicle, and greatly improves the endurance of the electric vehicle.

The invention belongs to the technical field of sulfur hexafluoride detection, and aims to solve problems that internal gas is easy to leak when an existing sulfur hexafluoride gas detection device is disassembled and replaced, the internal leaked gas cannot be treated, the interior cannot be ventilated, and the safety performance is poor. The invention provides a sulfur hexafluoride gas leak detection alarm apparatus and a working method thereof particularly; the sulfur hexafluoride gas leak detection alarm apparatus comprises a detection assembly, the detection assembly is installed on a high-voltage electrical cabinet, a sealing anti-leakage assembly and a rapid fixing assembly are installed in the high-voltage electrical cabinet, a gas processing chamber is formed in a gas processing box, and a gas pumping assembly is arranged on the gas processing box. A uniform gas outlet assembly is mounted in the gas processing chamber; according to the invention, the interior of the high-voltage electrical cabinet can be monitored and specific processing operation can be carried out based on data analysis, the safety and the use effect are remarkably improved, the detection device is convenient to replace, internal gas can be effectively prevented from leaking to the outside, and the safety performance is further improved.

The invention discloses an intelligent automatic ultrasonic detection system and method for in-service basin-type insulators. The detection system comprises a detection process library, a self-adaptive data acquisition module and an intelligent data analysis module; the detection process library comprises an insulator component with a typical structure and a common detection process, provides process parameters required to be set for the self-adaptive data acquisition module, and provides geometric structure parameters of the insulators for the intelligent data analysis module; the self-adaptive data acquisition module provides detection data for the intelligent data analysis module; the intelligent data analysis module realizes automatic positioning of defects according to the corresponding relation between the detection geometric structure parameters and the detection data; and the intelligent automatic ultrasonic detection system is used for detecting the internal defects of the in-service basin-type insulators. The invention realizes the accurate and rapid detection and positioning of the defects of air holes, cracks and the like in the basin-type insulators.

The invention discloses a vehicle obstacle avoidance method and device based on ultrasonic ranging. The method comprises the steps: carrying out the positioning and speed measurement of a vehicle according to a Beidou positioning system, and calculating a safety time threshold value through combining with the distance of an obstacle in front of the vehicle; obtaining the distance change between the vehicle and the obstacle according to the ultrasonic ranging, and obtaining the time value when the vehicle arrives at the obstacle according to the distance change; comparing the time value of the vehicle arriving at the obstacle with a safety time threshold value; and when the time value of the vehicle arriving at the obstacle is smaller than a safety time threshold value, carrying out braking intervention on the vehicle. According to the embodiment of the invention, ultrasonic ranging and a Beidou positioning test are combined, the high-precision positioning effect of the Beidou system is utilized, and the obstacle avoidance capability of the vehicle is improved.

The invention relates to the technical field of heaters, in particular to a new energy vehicle battery box which comprises a box body. The top of the box body is connected with a cover plate which isconnected with an upper hanging lug, the upper hanging lug is connected with a locking structure which comprises a lower hanging lug, a third spring, an upper limiting block, a lower limiting block and a sliding rod, the lower hanging lug is slidably connected with the sliding rod which is connected with the upper limiting block and the lower limiting block, and the lower hanging lug is connectedwith the third spring; partitions are arranged in the box body, air holes are formed in each partition, second springs are arranged on the partitions and the box body and connected with oblique plates, first springs are arranged on the undersurface in the box body, the tops of the first springs are fixedly connected with a moving plate, the top of each of the left and right outer walls of the boxbody is fixedly connected with a lifting ring, a through hole is formed in the middle end of the left side wall of the box body, the left-side wall of the box body is fixedly connected with a mountingframe at the through hole, a motor is fixedly mounted in the mounting frame, and the output end of the motor is fixedly connected with blades uniformly. The new energy vehicle battery box has good battery fixing effect, thereby being capable of avoiding batteries from shaking during movement.

The invention relates to an attaching assembly pressing jig, which comprises auxiliary material positioning clamps, workpiece positioning clamps, jacking mechanisms, slide blocks, attaching modules, counterweights, a machine table, and attaching plates. The attaching assembly pressing jig has the advantages that the attaching modules are conveniently replaced and handled by a handle on each attaching module; by adopting the modularizing design, the machine table is used for performing the attaching assembly on different workpieces by replacing the attaching modules, the workpieces are assembled by the jacking mechanism, and then the pressing weight in the pressing process is controlled by each counterweight; the pressing time is controlled by timing equipment which is arranged in the machine table; as the attaching modules are parallelly arranged, the assembly sequence is reasonably adjusted, the assembly of the next workpiece is simultaneously performed when the pressing requirement is met, and the efficiency is improved.

The invention relates to the technical field of fermentation treatment of agricultural waste, and discloses an efficient anaerobic fermentation device and method for livestock and poultry manure. Thedevice comprises a pretreatment system, an anaerobic fermentation system and a collection system, wherein the pretreatment system comprises a grit chamber, an acidification hydrolysis tank and an adjustment metering tank; and a stirring rod of an anaerobic fermentation tank is provided with a semipermeable membrane which wraps anaerobic fermentation bacteria therein. According to the invention, the acidification hydrolysis tank with a controllable pH value and the adjustment metering tank are arranged, so excrement is efficiently pretreated before entering the fermentation tank; the stirring rod in the anaerobic fermentation tank is connected with the semipermeable membrane which is easy to replace and is internally provided with the anaerobic fermentation bacteria; and meanwhile, the controllability and the automation characteristic of the device are improved due to the arrangement of a PLC, so the anaerobic fermentation efficiency of the excrement is effectively improved, and the controllability of instrument operation is high.

The invention provides a nozzle device which comprises a nozzle mechanism. The nozzle mechanism is provided with an upper nozzle fixing plate, a lower nozzle fixing plate hinged with the upper nozzle fixing plate, an upper nozzle detachably arranged on the upper nozzle fixing plate and a lower nozzle detachably arranged on the lower nozzle fixing plate; when the upper nozzle fixing plate and the lower nozzle fixing plate are closed, the lower nozzle and the upper nozzle form a box-shaped nozzle for a wire to longitudinally penetrate through, an inner cavity of the nozzle is connected with a spraying material source in a communicating manner, and the nozzle is provided with a through hole for the wire to penetrate through; and the first end of the nozzle is provided with a wire clamping assembly, and the wire clamping assembly is provided with a clamping hole penetrating in the longitudinal direction and used for the wire to penetrate through. The nozzle device is used for being arranged on a spraying robot and moving along with the spraying robot so as to spray a line, and therefore the spraying efficiency is improved; and meanwhile, the nozzle device can coat a spraying material in a direct contact manner, the spraying quality is good, and the application range is wide.

The invention discloses a double-side crossing-type automobile battery compartment structure capable of quickly replacing battery, comprising a vehicle body and a battery arranged at the front of thevehicle body, wherein a groove is arranged at the front of the vehicle body, and a battery cover connected with the vehicle body is installed on the groove, and one side of the battery cover is rotatably connected with the vehicle body, and the other side is connected with the vehicle body through a first lock; a bracket for mounting a battery is arranged in the groove, and the bracket is providedwith a second locking buckle of a fixed battery, and the second locking buckle is connected with a driving switch, and the first locking buckle comprises a base connected with a vehicle body and a locking rod slidably connected with the base, and the locking rod is provided with a locking tongue, and the locking tongue is connected with a return spring in the locking rod and a driving mechanism for driving the locking tongue to retract. The invention is novel in design, simple in structure and convenient in use, can replace the battery quickly by using a battery replacement station, reduces alot of time wasted by the vehicle owner due to charging, greatly increases the range of the electric vehicle, and greatly improves the endurance of the electric vehicle.

The invention discloses a new energy vehicle matching structure being convenient to quickly replace a power battery at a headstock, comprising a vehicle body and a battery arranged on the vehicle body, wherein the front part of the vehicle body is provided with a signal transmitter and a battery cover, and the battery cover is connected with a battery mounting frame in the vehicle body, and one side of the battery cover is connected with the vehicle body through a rotating shaft, and the other side is connected with the vehicle body through the first lock, and the vehicle body is provided witha driving device for driving the battery mounting frame up or down. The battery mounting rack is provided with a second lock for fixing the battery, and the second lock and the driving device are connected with a signal receiver arranged on the battery mounting rack through a control circuit board, and the control circuit board is connected with the first lock and the signal emitter. The invention is novel in design, simple in structure and convenient in use, can replace the battery quickly by using a battery replacement station, reduces a lot of time wasted by the vehicle owner due to charging, greatly increases the range of the electric vehicle, and greatly improves the endurance of the electric vehicle.

The AI intelligent panoramic camera comprises a camera body, A buffer anti-collision device is arranged in the connecting box and is connected with a movable plate; a transparent protective cover is arranged at the bottom of the movable plate, and the U-shaped frame is located in the transparent protective cover; the camera body is provided with a bearing plate, and the bearing plate is connectedwith the first rotating shaft. An outer gear ring is arranged on the outer peripheral surface of the transparent protective cover, and a first gear is arranged at the bottom end of the second rotatingshaft and is in meshed connection with the outer gear ring; an arc-shaped piece is arranged at the bottom of the outer gear ring, and bristles are arranged on the inner circumferential surface of thearc-shaped piece and make contact with the transparent protective cover; the connecting shaft is arranged on the connecting box and is rotationally connected with the connecting base, and a third gear is arranged on the connecting shaft; and a second gear is arranged on the third rotating shaft, and is engaged with the third gear. The dustproof, waterproof and anti-collision camera shooting device has excellent dustproof, waterproof and anti-collision performance, is convenient to disassemble and assemble, can carry out camera shooting in different directions and at different angles, can automatically clean dust on the surface of the transparent protective cover, and guarantees the camera shooting quality.

The invention discloses a protective respirator. The respirator comprises a base, multiple horizontal reinforcing ribs and multiple vertical reinforcing ribs are arranged on the base, and air holes are formed between two adjacent horizontal reinforcing ribs and two adjacent vertical reinforcing ribs; a silicone pad is arranged on one side of the base, a decoration cover is arranged on the other side of the base in a clamping mode, multiple intake holes are formed in the decoration cover, and a filter element is arranged between the decoration cover and the base; elastic ear bands are arranged on two sides of the base. The elastic deformation of the silicone pad is used for adapting to the surface profile of the face of a wearer, the leakproofness with the face is improved, the problem of air leakage is avoided, and thus the filter effect is effectively guaranteed; the own characteristic of the nano filter screen filter element and the guaranteed filter effect lay a good foundation for long wearing and sport wearing; meanwhile, each component in the protective respirator has no complex connection structure, and the respirator is convenient to disassemble and assemble and replace components, and small in size and weight, good in permeability, attractive in appearance and long in service life.