143results about How to "Guaranteed concentration" patented technology

The invention relates to the technical field of bearing detection, in particular to bearing detection equipment for bearing production and processing. The speed measurement sensor is arranged on the top surface of one side of the test bench, is matched with the layout of the ball cylinder and is used for monitoring the rotating speed of the inner ring and the outer ring of the bearing; the clamping parts are arranged on the two sides of the partition of the test board respectively and used for fixing the positions of inner and outer rings of the bearing; and the switching parts are symmetrically arranged in the test board and are matched with the rotation of the turntable and are quickly switched so as to push the inner ring or the outer ring of the bearing to rotate for rotating speed test. Through the clamping part and the switching part which are operated together, the movement of the inner clamping plate and the outer clamping plate is controlled by utilizing different rotating directions of the turntable, so that the bearing is accurately clamped and fixed at different ring positions according to the detection condition, and then the turntable rotates to synchronously push the air pipe to change the position, so that the inner and outer ring detection of the bearing can be independently operated; therefore, more comprehensive bearing detection is achieved, and double improvement of simple and convenient operation and detection precision is realized.

The invention discloses a vehicle-mounted camera shooting management method and system, and particularly relates to the technical field of image communication, and the system comprises an intelligent image collection processing module which is used for synchronously collecting high-quality image data through a plurality of cameras and carrying out the preprocessing of the image data, and a vehicle-mounted camera shooting management module which is used for carrying out the real-time analysis and recognition of the collected image data, and the real-time image analysis and identification module is used for extracting useful information and providing real-time feedback according to an analysis result. Through efficient image acquisition, real-time analysis, data management and intelligent auxiliary driving functions, the driving safety, the driving stability and the data management efficiency are remarkably improved. The system utilizes a multi-camera synchronization technology and a convolutional neural network denoising algorithm to ensure that high-quality images are captured in various environments, and a dynamic range adjustment module optimizes the image quality under different illumination conditions.

The invention discloses a sheet metal part welding tool and a welding method thereof, relates to the technical field of sheet metal part machining, and aims to solve the technical problem that when a current welding tool fixes a sheet metal part, the sheet metal part is prone to damage and deformation, and the sheet metal part welding tool comprises a workbench, welding equipment installed on the workbench and a movable machining platform assembly installed on the workbench. The workpiece taking assemblies are mounted on the two sides of the workbench; the part taking assembly comprises mechanical arms installed on the two sides of the workbench and adsorption assemblies installed at the output ends of the mechanical arms. The adsorption assembly comprises an adsorption plate, adsorption holes, a guide pipe and a vacuum pump; a cavity is formed in the adsorption plate, and the multiple adsorption holes are formed in one side of the adsorption plate and distributed in an annular array mode. The sheet metal parts are grabbed in a vacuum adsorption mode, and the appearance quality and the surface integrity of the sheet metal parts can be kept easily.

The invention belongs to the technical field of carbon dioxide capture low-energy-consumption safe storage methods, and discloses a marine diesel engine tail gas carbon dioxide capture low-energy-consumption safe storage method which comprises a carbon dioxide capture system, a low-energy-consumption system and a safe storage system. The carbon dioxide trapping system is mainly used for separating carbon dioxide from tail gas of a marine diesel engine for subsequent sealing or utilization, the carbon dioxide trapping system is divided into a pretreatment unit and a carbon trapping unit, and the carbon dioxide can be conveniently transported and sealed through liquefaction storage; the volume of the liquefied carbon dioxide is greatly reduced, long-distance transportation and storage are facilitated, the transportation cost is reduced, the liquefied carbon dioxide can also be used as a resource, for example, the liquefied carbon dioxide can be used in the fields of industrial raw materials, refrigerants, food preservation and the like, sustainable utilization of the resource is achieved, and the energy storage mode has the advantages of low cost, high efficiency, long service life and the like. And the energy utilization efficiency can be improved.

The invention discloses a sensing and planning method for automatic ball picking of a tennis ball picking robot. The sensing and planning method mainly comprises the four parts of visual sensing, map state updating, path planning and robot motion planning. According to the method, based on a camera carried by a ball picking robot, computer vision and artificial intelligence technologies are utilized to perceive, recognize and position tennis coordinates in a local visual field; according to the method, time-space fusion and task planning are carried out in combination with historical local view perception information, global scanning mapping in advance or sensors depending on global positioning are not needed, the ball picking efficiency is improved on the premise that more sensors are not used, and a ball picking area is not missed.

The invention discloses a sparkling water machine with a low-pressure maintaining function. The sparkling water machine comprises a main machine, a gas bottle, a water bottle, a first mounting seat, a first valve cavity, a first gas guide channel, a first valve body, a pressure feedback shutdown structure, an active exhaust valve body, an exhaust hole and a first reset spring. After bubble water is prepared, carbon dioxide gas in the water bottle can be directly and completely exhausted through the active exhaust valve body, and therefore the water bottle can be directly taken out. If a user does not need to drink directly after preparation is completed, active exhaust can be avoided through the active exhaust valve body, high-pressure carbon dioxide enters the first valve cavity through the first air guide channel and then is exhausted along the exhaust hole, and the amount of the exhausted carbon dioxide is controlled through the first valve body; and finally, the water bottle enters a low-pressure state with relatively low carbon dioxide gas concentration, and carbon dioxide in the bubble water is not easy to separate out due to the fact that certain carbon dioxide pressure is still kept in the water bottle, so that the concentration of the bubble water can be ensured, and residual pressure can be discharged when drinking is needed.

The novel atomization eyeshade comprises an eyeshade structure and main elastic bands, the eyeshade structure is worn on the face of a user and covers the peripheries of the eyes, the main elastic bands are installed on the two sides of the eyeshade structure, and an ultrasonic atomization assembly used for atomizing liquid medicine and conveying the liquid medicine into the eyeshade structure is connected to the eyeshade structure in an inserted mode. An electric power storage structure is installed on the eyeshade structure, the ultrasonic atomization assembly comprises a comprehensive frame body arranged in the middle of the top face of the eyeshade structure, a liquid storage frame used for storing liquid medicine is installed in the middle of the bottom wall of the comprehensive frame body, and an ultrasonic atomization piece is installed in the liquid storage frame; two flow guide plates used for guiding atomized liquid medicine to flow towards the outer side of the liquid storage frame are installed in the comprehensive frame body, and wind power structures used for increasing the flow speed of the atomized liquid medicine are installed on the two sides of the top wall of the comprehensive frame body. According to the utility model, the consumption of atomized drops can be effectively reduced, the efficiency of the atomized drops entering the eyeshade is accelerated, and the concentration of liquid medicine entering the eyeshade is ensured.

The invention belongs to the technical field of sludge treatment, and particularly relates to an aerobic granular sludge sewage treatment process applied to a continuous flow activated sludge process. A pelletizing agent is added into a granular sludge incubator, so that the pelletizing agent is in targeted combination with filamentous bacteria in activated sludge to form granular sludge, the granular sludge and flocculent sludge are effectively separated through a cyclone separation system, the granular sludge continuously flows back into a biochemical system, and the flocculent sludge is discharged into a sludge concentration tank or a sludge storage tank for dehydration treatment. According to the present invention, the AGS is rapidly cultured and the stable operation is maintained in the current or new continuous flow activated sludge process, such that the treatment water amount of the traditional continuous flow sewage treatment process can be subjected to in-situ capacity expansion, the impact load resistance can be enhanced, the addition amount of the phosphorus and nitrogen removal agent can be reduced, and the in-situ excess sludge can be reduced.

The invention discloses a low-altitude unmanned aerial vehicle countering monitoring system based on state feature decoding, relates to the technical field of unmanned aerial vehicle prevention and control, and is used for solving the problem of poor low-altitude target detection and countering. According to the invention, through closed-loop management and control of heterogeneous radar networking detection, signal level fusion processing, threat assessment and resource scheduling and intelligent countering decision, accurate identification and directional countering of the low-altitude unmanned aerial vehicle are realized; according to the method, the detection precision and the micro-Doppler feature extraction capability of a low-speed small target are improved by combining a virtual aperture synthesis technology, then unbalanced resource allocation is implemented based on a threat level, the system efficiency is optimized, and finally seamless migration of an interfered node task is realized by constructing a signal interference situation map. And continuous tracking and effect evaluation on the target are maintained in the active radio frequency countering process, so that the overall efficiency and reliability of low-altitude security and protection in a complex environment are effectively improved.

The invention discloses an etching device for semiconductor chip production, which relates to the technical field of semiconductor chip production. The device comprises an etching cylinder, a cylinder cover and a hydraulic cylinder. A flushing piece is arranged on the inner top surface of the cylinder cover. A hollow shaft is rotatably arranged on the cylinder cover. A gear 1 is fixedly connected to the top of the hollow shaft, a circular placement box is rotatably arranged on the bottom, and a stirring piece is arranged on the outer wall of the hollow shaft. A rotating shaft is rotatably arranged in the hollow shaft, a gear 2 is fixedly connected to the top of the rotating shaft, and an arc-shaped sealing plate is evenly fixedly connected to the bottom of the rotating shaft. An electric telescopic rod is arranged on the top surface of the cylinder cover, and a transmission component is arranged on the telescopic end of the electric telescopic rod. The invention realizes the opening of a through-hole area by using the transmission component, so that strong acid can enter the circular placement box conveniently, which is beneficial to the etching of the chip. After the etching of the chip is completed, the through-hole area can be closed to prevent water used for flushing the chip from entering the etching cylinder, thereby diluting the strong acid in the etching cylinder and ensuring the concentration of the strong acid.

The invention relates to the technical field of atmospheric pollution monitoring, and discloses high-precision atmospheric pollutant monitoring sensor equipment, which comprises a chimney main body, a switching assembly for pollutant monitoring is arranged on the chimney main body, and a cleaning assembly for cleaning an atmospheric pollutant sampling pipe is arranged on the chimney main body; when the chimney main body does not exhaust gas, the first gas collecting pipe is used for collecting ambient air without emissions for detection, and the ambient air can be used as a reference for subsequent data comparison; when the chimney main body exhausts flue gas, the second gas collecting pipe is used for collecting samples containing emissions; therefore, the atmospheric pollutant sampling pipe can be switched according to whether flue gas is discharged from the chimney main body or not, cross contamination of emissions and ambient air not containing the emissions is avoided, the accuracy of a detection result is ensured, and meanwhile, when the sampling pipe is switched, the unused sampling pipe is stored in the monitoring box, so that the sampling pipe is convenient to use. Furthermore, the unused sampling pipe cannot be polluted by dust and impurities, and the service life of the equipment is prolonged.

The invention discloses a rotary gas membrane separation device and a wastewater deammonification system thereof, belonging to the technical field of wastewater treatment. The rotary gas membrane separation device comprises an inner sleeve and an outer sleeve which are rotatably connected, and the inner sleeve and the outer sleeve are divided into a first exhaust chamber, a heating chamber and a second exhaust chamber by a sealing bearing; a water inlet pipe and a water outlet pipe are arranged on the inner sleeve, and a first gas collecting chamber, a degassing chamber and a second gas collecting chamber are formed in the inner sleeve by a check valve, and a separation filter element is arranged in the degassing chamber. The wastewater deammonification system comprises a wastewater tank, a liquid supply bracket, a liquid discharge bracket, a mounting bracket, a rotary gas membrane separation device and a rotating mechanism, and the liquid supply pipe exchanges heat with the gas discharged from the outer sleeve through a heat exchanger. A low-boiling point physical evaporation treatment technology is formed, which can be widely used for the separation of elements below the boiling point of water (such as ammonia element), and the concentration of recovered ammonia is ensured. The rotation of wastewater can prolong the treatment time, prevent particulate matter from clogging the membrane pores, and ensure the element recovery efficiency and recovery rate.

The invention discloses a heating device which is characterized in that a heating wire comprises an insulating core, a heating wire and an outer insulator, the insulating core is coated with the outer insulator, and the heating wire is arranged between the insulating core and the outer insulator. Through the arrangement of the structure, after electrification, the heating wire is heated to form a heating area, then heat is transmitted to the outer insulator, the first face makes contact with a packaging bag needing to be sealed, the outer insulator transmits the heat to the packaging bag through the first face, and the distance between the second face and the heating wire in the longitudinal direction is larger than that between the first face and the heating wire in the longitudinal direction. More heat can be concentrated on the first surface, so that the heat transferred to the part which does not need to be heated is reduced; meanwhile, when the heating wire is manufactured, the main body part of the heating wire is manufactured firstly, and then the heating wire with the corresponding length is cut according to the requirement and then is crimped, so that the manufacturing process of the heating device is simplified, and most use requirements can be met.

The utility model relates to the technical field of heat-not-burn, in particular to a heat-not-burn device and heat-not-burn equipment, a device body of the heat-not-burn device is provided with a containing cavity allowing an aerosol product to be inserted therein, and the aerosol product and the cavity wall of the containing cavity can define an air cavity at the closed end of the containing cavity; aerosol generated by heating the aerosol matrix section by the heating non-combustion device can flow to the air cavity from top to bottom and is gathered in the air cavity; the heating non-combustion device comprises an air suction channel with one end opening communicated with the air cavity and the other end opening communicated with the external space of the containing cavity, aerosol in the air cavity can be discharged along the air suction channel under the action of external suction force, and on one hand, resistance in the aerosol discharging process can be reduced; on the premise of ensuring the aerosol concentration of the first suction, the suction waiting time is shortened, on the other hand, the flow direction of water vapor generated after the aerosol product is heated is opposite to the flow direction of the aerosol, the content of water vapor discharged along with the aerosol can be reduced, and the probability that the mouth is scalded by sucking the first suction is reduced.

The utility model relates to the technical field of atomizing equipment, in particular to a novel atomizer, which can effectively reduce waste of medicine and improve treatment effect and comprises an atomizing cup, a cup cover is mounted at the top of the atomizing cup, a connector is arranged at the bottom of the atomizing cup, a connecting pipe is mounted at the bottom of the connector, and the connecting pipe is connected with the atomizing cup. An air outlet pipe is arranged on the atomizing cup, a mask is mounted on the air outlet pipe, a mounting head matched with the air outlet pipe is arranged on the mask, an extension pipe is arranged at the bottom in the atomizing cup, a baffle is arranged at the top in the atomizing cup, an air outlet hole is formed in the top of the mask, and a fixing block is arranged on the outer wall of the mask. The fixing block is provided with a blocking piece used for blocking the air outlet hole, the diameter of the blocking piece is larger than that of the air outlet hole, the blocking piece is made of rubber, the extension pipe is communicated with the installation head, a handle is arranged on the outer wall of the atomizing cup, and a bandage is arranged on the mask.

The utility model discloses biochar-based fertilizer synthesis equipment, which relates to the technical field of synthesis equipment, and comprises a synthesis cylinder, the top of the synthesis cylinder is provided with a circular notch, the synthesis cylinder is sleeved with a sleeve through the circular notch, the inner side of the sleeve is integrally formed with a flow guide ring, the bottom of the outer side of the synthesis cylinder is fixedly provided with a motor, and the motor is fixedly connected with the synthesis cylinder. The output end of the motor is fixedly provided with a rotating rod, the rotating rod extends to the inner side of the synthesis cylinder and is sleeved with a bearing sleeve, the bearing sleeve is sequentially provided with a first loading plate, a second loading plate and stirring blades, the bottom of the first loading plate is provided with a bottom scraping plate, and the second loading plate is provided with a side scraping plate; and a discharge hole is formed in the synthesis cylinder. A first loading plate is mounted on a bearing sleeve, and a bottom scraping plate is arranged at the bottom of the first loading plate, so that the device continuously turns over the fertilizer at the bottom of the synthesis barrel in the synthesis process, the fertilizer is stirred more uniformly, and the use effect of the fertilizer is improved.

The invention discloses a carbon content detection system in an environment, which relates to the field of carbon dioxide concentration detection, and comprises a carbon dioxide detection tower and a control terminal. The control terminal comprises an anti-seismic base, a protective body is fixedly provided on the upper end surface of the anti-seismic base, a main control integrated block is arranged in the protective body, and a hydraulic telescopic rod is fixedly provided on the upper end surface of the protective body. The invention detects the carbon dioxide concentration at different heights in the atmospheric environment, so as to fully understand the carbon dioxide situation in the environment, and at the same time, it can know in real time which time period has the highest carbon dioxide emission and which height has the most reduced carbon dioxide concentration, so as to prescribe the right medicine to accurately carry out carbon dioxide emission and carbon dioxide removal for efficient management, greatly improve the efficiency of reducing the carbon dioxide concentration, and at the same time, effectively maintain the carbon dioxide concentration in the atmospheric environment.

The application relates to the technical field of data center microbial prevention and treatment, and discloses a liquid supplementing device which comprises a box body, a sterilization module, a dosing module and a device pipeline system, the sterilization module is arranged on the inner wall of the box body and is used for sterilizing the working medium in the box body; one end of the device pipeline system is in communication with the box body, and the other end is in communication with a device; water supplementing pumps and one-way valves are arranged on the two sides of the dosing module, and the water supplementing pumps and the one-way valves are arranged on the device pipeline system. The application has the effects of preventing and treating the liquid supplementing device, and improving the reliability of data center operation.

The application belongs to the technical field of attention monitoring, and discloses an attention monitoring method, device, equipment and storage medium. The method comprises the following steps: when the use time length of a user is greater than a preset time length, collecting a face video of the user in a preset time period through a head-mounted device, and obtaining a face image in the face video; determining an eye position in the face image, and extracting eye information in the face image according to the eye position; determining eye opening and closing information of the user in the preset time period according to the eye information, and determining gaze information of the user in the preset time period; determining an attention monitoring result of the user based on the eye opening and closing information and the gaze information, and taking an intervention measure according to the attention monitoring result. In the above manner, an intervention measure can be taken in time when it is monitored that the user has attention dispersion.

The utility model discloses an integrated tank body structure of a tire bead steel wire copper plating auxiliary tank. The integrated tank body structure comprises an auxiliary tank I, an auxiliary tank II, an auxiliary tank III, a partition plate, a high-position overflow pipe, a discharge pipe, a stirrer, a communicating pipe, a metering pump, a circulating pump and a liquid level pipe, partition plates are connected into the first auxiliary groove and the second auxiliary groove, stirrers are connected to top plates, on the two sides of the partition plates, of the first auxiliary groove and the second auxiliary groove, the first auxiliary groove is connected to the top face of the second auxiliary groove, the second auxiliary groove is connected to the top face of the third auxiliary groove, and the bottoms of the side faces of the first auxiliary groove, the second auxiliary groove and the third auxiliary groove are all connected with discharge pipes and high-position overflow pipes; the bottom of the side face of the third auxiliary tank is further connected with a liquid level pipe, the high-position overflow pipe is connected with a discharge pipe, and the second auxiliary tank and the third auxiliary tank are connected through a metering pump and a circulating pump. Compared with the prior art, the copper plating auxiliary tanks are integrally connected to form a new tank body structure by using the connecting pipes connected with the ball valves and the metering pumps, so that the occupied area of the tank body is reduced, the stability of the concentration of a solution is ensured, and the dripping accuracy of the solution is improved.

The present invention relates to an etching device and an etching method thereof. The etching device comprises: an etching liquid supply unit, which supplies etching liquid to an etching chamber; a rinsing liquid supply unit, which supplies rinsing liquid to the etching chamber; a cleaning liquid supply unit, which supplies cleaning liquid to the etching chamber; and a first pressurization maintaining unit, which maintains at least one of the etching chamber and the etching liquid supply unit in a pressurized environment.

The invention discloses a dumbbell-shaped magnet structure and a magnetic resonance imaging system, and relates to the technical field of magnets, a first end magnet comprises at least one first magnet assembly, and the first magnet assembly comprises at least two layers of first annular magnets which are sleeved in sequence; the middle magnet comprises at least one second magnet assembly, each second magnet assembly comprises at least one layer of second annular magnet, and the multiple layers of second annular magnets of the second magnet assemblies are sequentially arranged in a sleeving mode; the second end magnet comprises at least one third magnet assembly, and each third magnet assembly comprises at least two layers of third annular magnets which are sequentially arranged in a sleeved mode. The number of layers of the first annular magnets of the first magnet assemblies is larger than that of the second annular magnets of the second magnet assemblies, and the number of layers of the third annular magnets of the third magnet assemblies is larger than that of the second annular magnets of the second magnet assemblies. And the magnet structure is dumbbell-shaped. According to the invention, the uniformity of magnetic field distribution can be improved, and the imaging space requirement of a magnetic resonance imaging system can be better met.

The utility model discloses a flow guide body assembly structure, and belongs to the field of oxygen generators. The flow guide body assembly structure comprises a base plate, a mounting groove is formed in the base plate, the flow guide body assembly structure further comprises a connecting block arranged in the mounting groove, and a first air port and a second air port are formed in the connecting block; the first connecting pipe and the second connecting pipe are arranged on the connecting block; the first communicating groove and the second communicating groove are both formed in the bottom of the connecting block, the two ends of the first communicating groove communicate with the first air port and the first connecting pipe correspondingly, and the two ends of the second communicating groove communicate with the second air port and the second connecting pipe correspondingly; grooves corresponding to the first communicating groove and the second communicating groove are formed in the mounting groove; according to the utility model, the installation and the disassembly are more convenient, the downtime is reduced, the working efficiency is improved, the fixation through a rubber tube or silica gel is not needed after the installation, and the problem of gas leakage is avoided.

The utility model discloses a precursor packaging container which comprises a first cavity, a second cavity, a buffer cavity, an on-off control assembly and a charging and pumping assembly. The first cavity is used for containing a liquid precursor and a solid precursor, the first cavity is provided with a first gas inlet pipe and a first exhaust pipe, and carrier gas input by the first gas inlet pipe carries the liquid precursor, then is mixed with steam of the solid precursor and is exhausted through the first exhaust pipe; a first baffle is arranged between the second cavity and the first cavity, and the second cavity supplements the liquid precursor to the first cavity through the first baffle. According to the precursor packaging container, the buffer cavity and the second cavity are matched with the inflation and extraction assembly, so that the liquid precursor can be supplemented to the first cavity from the outside, the service life of the packaging container can be prolonged, the capacity of the liquid precursor in the container is kept to provide an enough contact path for carrier gas, the concentration of the precursor carried by the carrier gas is ensured, and the packaging efficiency is improved. A stable precursor source is provided for a subsequent vapor deposition process, and the deposition film forming quality is ensured.

The utility model provides a drilling device capable of quickly positioning a drilling position, and relates to the technical field of drilling positioning, the drilling device comprises an assembling support, a placing table, a transverse moving assembly and a longitudinal control assembly, a transverse positioning strip is machined at the top of one end of the placing table, longitudinal positioning strips are machined at the tops of the two sides of the placing table, and a notch is machined in the placing table; the same center supporting strip is assembled between the centers of the bottoms of the two first supporting strips, and a collecting frame is machined in the center of the bottom of the center supporting strip. The longitudinal control assembly controls the moving direction of the transverse moving assembly to be perpendicular to the moving direction of the placing table controlled by the transverse moving assembly. According to the technical key points, the placement table for bearing the aluminum template is controlled to move left and right through the transverse moving assembly, the transverse moving assembly is controlled by the longitudinal control assembly to drive the placement table to move front and back, the aluminum template can move to any position below the drilling assembly, and it is guaranteed that waste generated by cutting is concentrated at one position; and the positioning of the aluminum template is not influenced.

The invention provides a method for preparing a nano silver solution, and belongs to the technical field of nano silver preparation. The method uses silver nitrate as a silver source, water as a reaction solvent, polyvinyl pyrrolidone as a first dispersant, and gum arabic as a second dispersant. After the silver source is preferentially encapsulated by the first dispersant, a mixed solution of a reducing agent and a second dispersant is poured at one time to prepare a nano silver solution. The invention adopts the synergistic effect of the first dispersant and the second dispersant to make the prepared nano silver particle size distribution more uniform, and can still remain stable after being placed for 30 days; by adjusting the pH value of the solution to be alkaline, it is ensured that the H ‑ The concentration of the reducing agent increases the reducing ability. This method has a rapid reaction, simple operation, no requirements for experimental conditions and equipment, etc., can be stably expanded to 25L, and the particle size does not change after long-term storage. It has highly stable dispersibility and is suitable for large-scale industrial production.

The invention discloses a lithium ion battery negative electrode with long cycle life and high first efficiency and a preparation method thereof. The lithium ion battery negative electrode comprises a composite current collector, a silicon-carbon negative electrode active material coating coated on at least one surface of the composite current collector, and a lithium supplementing coating coated on the outer surface of the silicon-carbon negative electrode active material coating, the lithium supplementing coating comprises an inorganic lithium-containing compound, halloysite nanotube powder and lithium polyacrylate, and the mass part ratio of the inorganic lithium-containing compound to the halloysite nanotube powder to the lithium polyacrylate is (20-25): (65-75): (2-5); the inorganic lithium-containing compound is a mixture formed by lithium borate and lithium carbonate according to the mass ratio of (1-2): 1. Compared with the prior art, the lithium ion battery negative electrode provided by the invention has relatively high first efficiency, relatively long cycle life and relatively high safety performance.

The invention belongs to the technical field of dustproof masks, and discloses a dustproof mask for mine tunneling work, which comprises a mask body, and a filter assembly and a sound transmission assembly arranged on the mask body, and the filter assembly and the sound transmission assembly are mounted on the mask body; the adjusting assembly is arranged on the sound transmission assembly; the sound transmission assembly comprises a connecting cylinder fixedly connected to the mask body, and one end of the connecting cylinder is fixedly connected with a first connecting ring. According to the scheme, when an operator speaks, sound waves are collected through the sound insulation cover and enter the sound transmission barrel, the film cannot isolate sound, so that the sound waves can vibrate the film and transmit the vibration to the sound amplification cover, and then the sound waves are amplified through the loudspeaker of the sound amplification cover and then spread to the outside; meanwhile, due to the fact that communication of the two sides of the mask body is integrally isolated through the sound transmission assembly, it is guaranteed that the mask body has the good protection effect and meanwhile has the good sound transmission effect, and communication is facilitated when an operator wears the mask body.

The invention discloses a self-cleaning type solar street lamp convenient to maintain, and relates to the technical field of street lamp illumination, the self-cleaning type solar street lamp convenient to maintain comprises a lamp body mechanism, a lamp illumination mechanism, a lamplight diffusion mechanism and a light adjusting mechanism are arranged in the lamp body mechanism, and the lamplight diffusion mechanism is sleeved with the lamp illumination mechanism; the light adjusting mechanism is located in the lamp illumination mechanism, and the lamplight diffusion mechanism is used for adjusting the light illumination angle. In the hazy weather, the transmission mechanism drives the light diffusion assembly to rotate by a half circle, the light ray angle of lamplight can be adjusted, the light ray penetrability is improved, scattering and absorption of light rays by haze are reduced, and the lighting effect of a road is ensured; in addition, the light transmitting assembly and the light expanding assembly are combined together, the penetrability of lamplight is further improved by changing the refraction angle of light, and the good illumination effect is kept in hazy weather.

The utility model discloses a mixed gas injection system, which relates to the technical field of gas distribution, and comprises a mixing tank, the top of the mixing tank is provided with a tank cover, the inner wall of the mixing tank is movably sleeved with a piston, the top of the piston is fixedly provided with a mounting plate, the upper surface of the mounting plate is fixedly connected with a screw rod, and the screw rod is fixedly connected with a screw rod. An inner threaded pipe is rotationally connected to the center of the top of the tank cover in a sleeving mode, the lead screw is arranged in the inner threaded pipe in a threaded penetrating mode, a driving mechanism is arranged on the upper surface of the tank cover, the inner threaded pipe is in transmission connection with the driving mechanism, and first electromagnetic valves are fixedly arranged at the lower ends of the two sides of the mixing tank in a penetrating mode. Through the arrangement of the piston, the piston can be moved downwards to the bottom of the mixing tank to completely discharge gas in the mixing tank before gas distribution, and the piston is driven to move upwards in the gas distribution process, so that the gas can enter the mixing tank through different gas inlet pipes, and the concentration of the mixed gas is effectively ensured.