32results about How to "Diffuse fully" patented technology

The utility model discloses a pool wall spraying maintenance device, which relates to the technical field of concrete spraying maintenance equipment, and comprises a pool wall, a spraying system, a support system, an automatic water supply system, a water delivery hose, a three-way joint and a water supply line, the spraying system is fixedly arranged on the support system, the spraying system is fixedly arranged on the pool wall through the support system, and the automatic water supply system is fixedly arranged on the pool wall through the water delivery hose. The water delivery hose and the water supply line are both communicated with the automatic water supply system, and the three-way connector is arranged on the water delivery hose and used for being connected with the spraying system in series. According to the device, the safety risk during maintenance construction of the pool wall of the water pool of the sewage treatment plant can be obviously reduced, the device needs manual intervention during installation, other working states are all automatic, the manual high-altitude operation time is shortened, and the probability of safety accidents during maintenance construction is reduced.

The embodiment of the invention provides an adsorption column experimental device. The adsorption column experimental device comprises a shell assembly and a sieve plate, the shell assembly is provided with a containing space, an air inlet channel and an air outlet. The sieve plate is arranged in the accommodating space so as to divide the accommodating space into an adsorption cavity and an overflowing cavity; the air inlet channel is communicated with the overflowing cavity, the air outlet is communicated with the adsorption cavity, so that an air flow path which passes through the overflowing cavity and the adsorption cavity in sequence from the air inlet channel to the air outlet is formed, and at least the position where the air inlet channel is communicated with the overflowing cavity is located on the side, close to the adsorption cavity, of the overflowing cavity. According to the adsorption column experimental device, airflow distribution in the accommodating space can be improved, so that the utilization rate of an adsorbent is increased.

A high-alloy steel electroslag ingot and its homogenization method are provided, comprising the following steps: S1, electroslag ingot pretreatment: removing surface oxide scale and crack defects, and grinding to a surface roughness Ra≤6.3μm; S2, staged heating: heating to 800-900℃ at a rate ≤100℃ / h and holding for 2-6h; heating to 1000-1100℃ at a rate ≤100℃ / h and holding for 2-6h; heating to 1200-1300℃ at a rate ≤150℃ / h and holding for 10h. -20h; S3, Stepped cooling: Turn off the heating device and cool with the furnace to 800-1000℃, hold for 2-6h; cool to 500-650℃ at a rate of ≤50℃ / h, hold for 2-6h; open the furnace door and introduce cooling air at a speed of 0.5-3m / s to cool to room temperature, obtaining homogenized high-alloy steel electroslag ingots; S4, Post-homogenization testing: the relative standard deviation of each alloying element is ≤5%; the average grain size is ≤10μm; the Brinell hardness fluctuation range is ≤15HBW. This invention eliminates component segregation, refines grain structure, optimizes process parameters, is highly efficient and energy-saving, easy to promote, and has strong practicality.

The application belongs to the technical field of metal materials, and discloses a high-strength and high-toughness medium-manganese steel based on warm rolling and deep cryogenic treatment and a preparation method thereof. The preparation method comprises the following steps: combining a specific warm rolling process (720 DEG C~760 DEG C) with liquid nitrogen deep cryogenic treatment (soaking for 0.3~0.6h) and supplementing low-temperature tempering (180 DEG C~220 DEG C). The process induces deformation through warm rolling, promotes the transformation and refinement of austenite into martensite in combination with deep cryogenic treatment, and then eliminates internal stress and precipitates fine carbides through low-temperature tempering, so as to synergistically control the microstructure. The technical bottleneck that the strength and plasticity of traditional medium-manganese steel are difficult to be compatible is effectively solved, and the organization is super-refined and the stability is improved. The obtained medium-manganese steel has a good match between ultra-high strength and excellent plasticity, the yield strength is greater than 1800MPa, the tensile strength is as high as 2300MPa, the elongation after fracture is more than 17%, and the comprehensive mechanical properties are significantly improved.

The invention discloses a high-stability rubidium-boron-silicon superhard compound and a preparation method thereof, and belongs to the technical field of superhard materials, the superhard compound is a composite structure block material formed by taking rubidium-boron-silicon as a basic framework and introducing an alkali metal regulator; the composite structure comprises a high-entropy ceramic matrix and nano twin crystals distributed in the matrix; the high-entropy ceramic matrix is a solid solution consisting of rubidium, boron, silicon and alkali metal cations introduced by the alkali metal regulator; the nano twin crystal is a lamellar crystal structure with coherent twin boundaries; through collaborative innovation of a material system and a preparation process, the rubidium-boron-silicon superhard compound with ultrahigh hardness and excellent thermal stability is developed, and a brand new solution is provided for superhard materials serving in an extremely high-temperature environment.

This application provides a diffusion furnace, comprising a diffusion furnace body, a containment space enclosed by the diffusion furnace body, a support boat, and temperature control rods. The support boat is disposed within the containment space along a first direction, and the temperature control rods are disposed within the containment space along a second direction, on the side away from the support boat. The first and second directions are perpendicular to each other. The containment space includes multiple different temperature control zones, and multiple temperature control rods are respectively disposed within the multiple temperature control zones and fixed to the inner wall of the diffusion furnace body corresponding to the temperature control zones. Thus, this structure allows for temperature adjustment of different temperature control zones within the containment space via the temperature control rods, ensuring the uniformity of the diffusion gas within the containment space, resulting in sufficient chip diffusion and thereby improving chip yield.

The application discloses a kind of bottle residual gas safety processing mechanism for gas production, it is related to gas processing technical field, including processing tank, the downward two sides of processing tank are respectively provided with the interface for residual gas supply and discharge, and the side of processing tank is fixedly connected with mounting bracket, and the inside of mounting bracket is fixedly connected with the liquid tank of containing filter liquid, and the inside of processing tank is fixedly connected with the filter plate for filtering gas.The bottle residual gas safety processing mechanism for gas production, the side of rotating ring is fixedly connected with driving plate, liquid tank inside water flows to rotating ring, will impact the driving plate of inclined arrangement, under the action of water flow impact force, rotating ring will be around its central axis stable rotation, in the rotating ring rotation process, with the rotation of rotating ring, its below spray pipe also rotates, so that filter liquid is evenly sprayed in the form of rotary spray in processing tank inside, expands the spray coverage, so that gas and liquid can be more fully contacted and mixed, improves the dissolution and washing effect of impurities in gas.

This invention discloses an active metal brazing paste and its preparation method. The active metal brazing paste is characterized by comprising brazing powder and a binder, wherein the binder component accounts for 8-20% by mass. The brazing powder comprises the following components by mass percentage: 10-30% nano-silver powder; 60-80% silver-copper alloy powder; 5-10% aluminum-silicon alloy powder / titanium-aluminum alloy powder; 2-5% titanium hydride powder. The binder comprises the following components by mass fraction: 75-90% solvent; 5-10% thickener; 2-4% surfactant; 1-2% dispersant; 2-5% thixotropic agent. Compared with the prior art, the active metal brazing paste of this invention has the following beneficial effects: the ceramic copper-clad laminate prepared by the active metal brazing paste has high connection reliability and excellent resistance to thermal cycling.

The utility model provides a classical guitar sound hole sound bucket belongs to guitar sound hole sound bucket field, including the resonance box, the neck and the head, the outside wall of fingerboard is provided with a plurality of silk, a plurality of strings are fixedly connected on the bridge, the side wall of resonance box is provided with the sound hole, the sound hole is roundly provided, the sound hole is located the top of bridge, the inner side wall of resonance box is fixedly connected with the main sound bucket, the inner side wall of main sound bucket is provided with the internal thread, the inner side of main sound bucket is provided with the vice sound bucket, main sound bucket and vice sound bucket all are circular tubularly provided, the position of sound hole corresponds with main sound bucket, the inner side wall of vice sound bucket is fixedly connected with the plucking platform, and the plucking platform is equidistantly arranged on the inner side wall of vice sound bucket, the utility model discloses, through setting up main sound bucket in the sound hole, main sound bucket makes the flowing mode of resonance box inside air through the improvement, makes the sound in the musical instrument more fully reflected and diffused to improve the whole resonance efficiency, makes the sound more full.

The utility model discloses a fishery breeding water treatment device which comprises a degassing tower, a plurality of air chambers, a plurality of oxygen pipes, oxygen supply equipment, a water spraying pipe and a receiving tank, the upper end of the degassing tower is open, the side wall of the degassing tower is provided with an air inlet, and the air chambers are arranged below the degassing tower and communicated with the degassing tower; an oxygen inlet and an oxygen outlet are formed in the side wall of the air chamber; one end of the oxygen pipe is connected with an oxygen outlet of one air chamber, the other end of the oxygen pipe is connected with an oxygen inlet of the other air chamber, and all the air chambers are sequentially communicated through the oxygen pipe; the oxygen supply equipment is connected with the oxygen inlet on the first air chamber in the plurality of air chambers which are sequentially communicated through an oxygen inlet pipe and is used for supplying oxygen to the air chambers; the water spraying pipe is arranged at the top end of the degassing tower and is used for spraying water downwards; the receiving pool is arranged at the lower end of the air chamber and used for receiving water flowing down from the air chamber, and a water outlet is formed in the bottom of the receiving pool and used for draining water. According to the water treatment device for fishery breeding provided by the utility model, the degassing equipment and the oxygenation equipment are longitudinally stacked, so that the occupied area is small, and the degassing and oxygenation effects are good.

This specification provides a system and apparatus for constructing an animal model of spinal glioma, relating to the field of intelligent medicine. The system, executed by a robot, includes: a puncture point localization module configured to locate the highest point of the spine in its natural state as the puncture point; a spine exposure module configured to locate points at a first distance above and below the highest point of the spine along the spinal direction, forming a line segment; controlling the cutting of the dorsal skin of the animal sample along the line segment to expose the spine; a puncture needle insertion module configured to control the puncture needle to penetrate the puncture point perpendicular to the vertebral interface at a first speed until the puncture needle penetrates the spinal cord tissue; controlling the puncture needle to retract a third distance and pause for a first time; a cell suspension injection module; and a puncture needle withdrawal module configured to control the withdrawal of the puncture needle, thus obtaining the animal model. This application provides insights for clinical research on the molecular characteristics of spinal glioma and the identification of potential therapeutic targets.

The application discloses a nitrogen-doped carbon lithium-sulfur battery positive electrode carrier material with directional pores and iron monatomic anchoring, and a preparation method and application thereof, and belongs to the technical field of lithium-sulfur battery positive electrode materials. Graphene oxide and cellulose nanofibers are dispersed in water to form a dispersion liquid; a mixed metal salt solution prepared by zinc salt and iron salt is added to the dispersion liquid, and a composite hydrogel is formed through electrostatic self-assembly; the composite hydrogel is placed on a pre-cooled metal substrate to perform directional freezing and freeze-drying, and an aerogel precursor with a directional pore structure is obtained; the aerogel precursor is subjected to programmed temperature carbonization with a solid nitrogen source, and a nitrogen-doped carbon lithium-sulfur battery positive electrode carrier material with directional pores and iron monatomic anchoring is obtained. Through the cooperation of directional freezing and gas-phase doping, vertical through pores are constructed, and iron monatomic atoms are anchored, the shuttle effect is inhibited, high specific capacity, excellent rate and long cycle life are realized, and the capacity retention rate reaches 88.5% after 600 cycles at 0.1C.

The utility model discloses a kind of heat exchangers of cyclone support structure, it is related to heat exchanger equipment technical field, including shell, vertical setting;Pipe plate, set in the both ends of shell, the shell one end between two pipe plates is equipped with cold fluid medium import, and the other end is equipped with cold fluid medium export;Multiple heat exchange tubes, its both ends are fixed between pipe plate and are penetrated;Upper head, lower head, respectively sealed connection in the both sides opening of shell, the both ends of each heat exchange tube are all corresponding to connect upper head and lower head, and upper head is equipped with hot fluid medium import, and lower head is equipped with hot fluid medium export;Multiple cyclone components, along axial interval setting between two pipe plates, each heat exchange tube is all through cyclone component, and structure unit that can produce fluid cyclone effect is equipped in cyclone component;Support, set in the peripheral surface of shell.The above-mentioned heat exchanger of cyclone support structure, structure simple, manufacturing cost low, technical effect of high heat exchange efficiency are realized.

The utility model relates to a kind of multi-air duct heat dissipation cabinets, including cabinet body and two respectively symmetrical positioning frame located in the left and right sides of cabinet body inside, the left side or the right side inner wall of cabinet body is equipped with respectively up and down distribution air outlet window hole and air inlet window hole;Positioning frame includes multiple horizontal support beams being set horizontally and sequentially parallel distribution from top to bottom and two vertical and detachable fixed between multiple horizontal support beams and respectively front and rear distribution longitudinal mounting strip, the inner wall of one side of cabinet body on air outlet window hole is also provided with flow guide component, flow guide component includes flow guide cover being fixed on the inner wall of cabinet body and sealing cover being set in the outer periphery of air outlet window hole inside opening, and two vertical fixed on the inner wall of cabinet body and respectively located first U-shaped flow guide strip on the upper and lower sides of flow guide cover;The utility model has flow guide function, and further can effectively improve heat dissipation effect to ensure that cold air can cool all electrical or electronic equipment, so as to break through the height limit of cabinet to enhance practicality.

This invention discloses a samarium-based rare-earth permanent magnet bulk material, its preparation method, and its application. (The last part, "ThMn," appears to be an incomplete sentence or fragment and is left untranslated.) 12 A uniform metallic T coating is formed on the surface of the magnetic powder. The composite magnetic powder is then oriented, pressed into blocks, and heat-treated to create a double-layered non-magnetic shell around the grains. This shell hinders domain movement, effectively improving the material's coercivity. Furthermore, compared to doping or melting, the coating process requires less T and allows for more precise control, preventing excessive T from entering the crystal lattice and negatively impacting the material's intrinsic magnetic properties, thus significantly improving the coercivity of ThMn. 12 Density and overall performance of rare earth permanent magnets.

The application relates to the field of synthesis of selenide, and aims at the technical problems of complicated operation steps and slow reaction process in the implementation of the existing method, and provides an alkali metal selenide compound based on a direct preheating method, a preparation method and application thereof, which comprises the following steps: in a glove box in an inert gas atmosphere, heating alkali metal elements until the alkali metal elements are in a liquid state; mixing selenium elements with the liquid alkali metal elements and reacting for 1-3 seconds to form a molten state, after the molten substance is solidified, standing and cooling, and grinding to obtain an alkali metal selenide compound; the molar mass ratio of the selenium elements to the alkali metal elements is 1:0.5-2. x Se y The precursor compound can simplify a precursor synthesis process, reduce a synthesis condition threshold, reduce synthesis time cost and money cost, and improve precursor product synthesis efficiency.

The application provides a preparation method of a zinc-doped lithium nickel cobalt manganese oxide positive electrode material, and the preparation method comprises the following steps: S1, mixing a nickel source, a cobalt source, a manganese source and a zinc source to obtain a mixed salt solution; S2, in an inert atmosphere, mixing the mixed salt solution and a precipitant solution by simultaneously dropping, continuously dropping the precipitant solution to adjust the pH value of the mixed solution to 10-11, performing a co-precipitation reaction, and obtaining a precursor slurry; S3, adjusting the pH value of the precursor slurry in step S2 to 7-8, performing solid-liquid separation, and drying the precipitate to obtain a precursor; and S4, mixing the precursor in step S3 with a lithium source, and sintering to obtain the zinc-doped lithium nickel cobalt manganese oxide positive electrode material. The method provided by the application can reduce the surface residual alkali content of the positive electrode material, and excellent cycle stability is obtained.

The utility model discloses an aeration device for algae culture relates to aeration equipment field, including the horizontal setting of gas supply pipe, and the outer circumferential surface intercommunication of gas supply pipe installs a plurality of aeration disc, and one end intercommunication of gas supply pipe installs the connecting pipe, and the other end intercommunication of connecting pipe installs the external gas supply pipe, and the other end of external gas supply pipe is connected with the input end of external gas supply equipment, and through external gas supply equipment will gas source input to aeration disc, and gas supply pipe along vertical direction sliding assembly, when the liquid surface in algae culture pond drops or rises, and gas supply pipe synchronous downward or upward movement. Through the height adjustable and overturning function of aeration disc, the gas exchange process in water body is optimized, thereby improving the carbon dioxide supply of algae, promoting photosynthesis, can also effectively reduce local peroxide or anoxic problem, reduce the instability of algae growth environment, improve the yield and quality of culture.

The invention discloses a germanium-silicon heterojunction npn type bipolar transistor and a preparation method thereof, and relates to the technical field of semiconductors. According to the germanium-silicon heterojunction npn-type bipolar transistor and the preparation method thereof, a p-type in-situ doped germanium-silicon-carbon selective epitaxial growth method is adopted; a p-type in-situ boron-doped germanium-silicon-carbon epitaxial inner base region located below a region surrounded by the silicon nitride inner side wall, a cantilever located on the outer base region polycrystalline silicon layer and a p-type in-situ boron-doped silicon connecting base region located below the silicon nitride inner side wall can be grown at the same time; therefore, the germanium-silicon-carbon epitaxial inner base region capable of ensuring enough high cut-off frequency and the silicon connecting base region capable of ensuring the parasitic resistance of the base region as small as possible can be obtained simultaneously, and the parasitic resistance of the connecting base region is reduced, so that the resistance of the parasitic base region of the germanium-silicon heterojunction npn type bipolar transistor can be reduced; the maximum oscillation frequency fmax can be improved under the condition that the cut-off frequency is given, and the radio frequency noise coefficient can be effectively reduced.

The invention discloses a production process of a 6-series aluminum alloy profile, and belongs to the technical field of aluminum alloy material preparation. By adding trace Sc and Zr elements and nano TiN particles and combining a multi-stage homogenization heating and temperature control rolling process, crystal grains are effectively refined, recrystallization is inhibited, a dispersion strengthening phase is formed, the final aluminum alloy section keeps good plasticity and toughness, meanwhile, higher strength and corrosion resistance are obtained, a multi-stage heating homogenization treatment system is adopted, and the service life of the aluminum alloy section is prolonged. According to the method, full dissolution and diffusion of 6-series aluminum alloy elements are promoted, composition segregation and internal stress are reduced, subsequent online spray quenching and air cooling are combined, rapid, uniform and controllable cooling is achieved, the performance difference of all parts of the aluminum alloy profile is greatly reduced, and the structure and size stability is ensured. And on the whole, the aluminum alloy profile is endowed with excellent strength and corrosion resistance through precisely controlled chemical components and process optimization.

This application provides an ink path valve block structure, an inkjet printer, and a cleaning method, relating to the field of inkjet printing technology. By employing a stacked structure with a detachable top cover and valve block body, and featuring multiple interconnected ink path grooves and multiple ink outlets, as well as through-hole pairs and valve components on the top cover, the application effectively solves the problems of limited pipeline layout, difficulty in expansion, ink residue, and ineffective cleaning inherent in existing integrated drilled valve blocks. Furthermore, ink, under the influence of gravity, first fills the ink path grooves in the valve block body's flow channel before entering the valve component through the through-hole pairs and flowing downwards. This gravity-driven filling-before-discharge design ensures sufficient ink diffusion and uniform distribution, reduces dead zones and ink residue, and improves ink utilization.

This application relates to the field of welding technology in electronic manufacturing, specifically to a vacuum diffusion welding method for aluminum heat spreaders. The method includes a pretreatment stage, a welding process implementation stage, and a post-treatment stage. The pretreatment stage includes sequentially sandblasting, ultrasonic cleaning, and plasma activation treatment of the aluminum surface, followed by preheating under vacuum or inert gas protection. The welding process implementation stage includes assembly and positioning using high-precision fixtures, followed by diffusion welding in a vacuum environment using a stepped pressure method. The post-treatment stage includes cryogenic treatment. This invention significantly improves the interfacial atomic diffusion efficiency and metallurgical bonding strength through a combination of sandblasting roughening and plasma activation surface pretreatment combined with stepped pressure vacuum diffusion welding. For aluminum-copper dissimilar metal connections, a transition layer and a barrier layer are introduced to suppress brittle intermetallic compounds. For flexible electronics manufacturing, gradient heating and local temperature difference control are used to achieve reliable low-temperature connections.

This invention discloses an ultrasonic coupling cleaning process for printed circuit board substrates, belonging to the field of printed circuit manufacturing technology. The process includes cleaning solution preparation, pretreatment, ultrasonic coupling cleaning, gradient temperature field stabilization, microbubble-enhanced separation, post-treatment, and drying steps. The cleaning solution is free of hydrogen peroxide and stabilizers, employing a low-alkali system combined with frequency conversion ultrasound to achieve efficient removal of adhering substances. A gradient temperature field promotes the full diffusion of impurities between fibers, followed by in-situ adsorption and flotation via micro-nano bubbles to complete three-phase separation. This invention significantly improves the cleanliness of glass fiber electronic cloth, with a residual impurity index (LOI) ≤0.08% and a tensile strength retention rate ≥95%. The entire process involves no high-temperature calcination or damage from strong oxidants, resulting in low energy consumption, easily treatable wastewater, and strong process adaptability. It is suitable for efficient and green cleaning of high-end electronic reinforcing substrates such as printed circuit boards and electronic packaging materials, meeting the needs of large-scale production.

The utility model relates to an air duct and a case in the field of air guide, which comprises a duct body, one end of the duct body extends to the other end of the duct body in a gradually expanding manner, a through air guide channel is formed in the duct body, an obliquely arranged mounting part is formed at one end of the duct body, a connecting part is formed at the other end of the duct body, and an accommodating cavity is formed in the case body. According to the utility model, the air guide cylinder is arranged in the box body, the air guide machine is in contact with the mounting part to form inclined mounting, and the air guide cylinder is additionally arranged at the air inlet end of the heat dissipation channel, so that a gradual airflow guide-in structure is formed; the installation of the air guide fan has an inclination angle through the inclination of the installation part, so that the electronic accessories in the box body are effectively prevented from vertically blocking the airflow, the air guide channel forms a continuous and through airflow conveying path in the heat dissipation channel, and the ventilation and heat dissipation effects on all parts in the box body are enhanced.

This application relates to a vapor deposition apparatus and an electrode plate. The vapor deposition apparatus includes: a housing having a process chamber and an air inlet communicating therewith; and an electrode plate assembly including a first electrode plate and a second electrode plate. The first electrode plate divides the process chamber into a first chamber and a second chamber. The first electrode plate has a plurality of dispersion holes communicating with the first chamber and the second chamber. Each dispersion hole includes a connecting section and a first hole section successively distributed along its axial direction. The first hole section extends to the surface of the first electrode plate facing the second chamber. The connecting section is located at the end of the first hole section facing away from the second chamber. Along the axial direction, the diameter of the first hole section increases, and the diameter at the end facing the second chamber is larger than the diameter at the end facing away from the second chamber. The diameter of the connecting section is smaller than the diameter of the first hole section facing away from the second chamber. The vapor deposition apparatus provided in this application can rapidly and uniformly form plasma, thereby improving the uniformity of the film thickness.

The application provides an alloy thin-walled porous structure and a preparation method thereof, and relates to the technical field of metal structure manufacturing.The preparation method comprises the following steps: alternately stacking foil blanks and mandrel assemblies and placing them between upper and lower mold plates to perform hot-pressing integrated forming; wherein the mandrel assembly comprises a plurality of mandrels, and the plurality of mandrels are horizontally spaced apart; the foil blank comprises a plurality of metal wave-shaped plates, the plurality of metal wave-shaped plates are arranged in layers, and the materials of two adjacent metal wave-shaped plates are different.The application forms metal wave-shaped plates by using metal single-element foils, alternately stacks the plurality of metal wave-shaped plates and the plurality of mandrels, and places them between upper and lower mold plates to perform hot-pressing integrated assembly forming, thereby realizing accurate and overall preparation of the alloy thin-walled porous structure, solving the problem of difficult forming of metal alloy thin plates, and improving the reliability of the metal thin-walled porous structure.

This invention discloses an environmentally friendly firework, comprising an outer shell, a gasbag, and a conical barrel. The gasbag is disposed inside the outer shell, and the conical barrel is fitted over the gasbag. The lower part of the inner wall of the conical barrel is in contact with and sealed to the surface of the gasbag. A receiving cavity is formed between the upper part of the gasbag and the interior of the conical barrel, and the receiving cavity is filled with a propellant. Powdered materials, including sugar powder and a flame coloring agent, are placed inside the gasbag. A cover plate is provided on the top of the conical barrel, and the cover plate is fixedly connected to the outer shell. A lead wire is provided on the surface of the cover plate, extending into the receiving cavity. This invention provides an environmentally friendly firework that reduces environmental pollution while maintaining the effects of traditional fireworks. This invention also provides a method for manufacturing the environmentally friendly firework.

The utility model belongs to air purifier technical field, specifically disclose a kind of filter screen layer number adjustable air purification machine, including shell, air duct, multiple different categories filter screen and fan;Shell is equipped with air inlet and air outlet, the one end of air duct is communicated with air inlet, and the other end is communicated with air outlet;Filter screen is sequentially spaced in air duct, the distance between adjacent filter screen is greater than its width, and the bottom of filter screen is connected with the power source that it swings from top to bottom and towards air inlet side, the inner wall of air duct is equipped with recess, and power source is placed in recess;Fan is installed at air outlet place.Adopting the technical scheme, filter screen swings in air duct using power source control, realize the layer number regulation of filter screen, reduce wind resistance.

This utility model discloses a resin two-component precise proportioning mixing device, belonging to the field of mixing device technology, including a mixing tank, a stirring structure, and a feeding structure; firstly, two resin raw materials are injected into two storage tanks respectively through feed pipes, and the switch is controlled by a first control valve, and the initial feed amount is determined according to the scale on the outer wall of the storage tank; the electric push rod is started, and the push rod slowly extends, pushing the push plate fixedly connected to the push rod to move smoothly inside the storage tank. During the movement of the push plate, the resin raw materials in the storage tank are gradually squeezed towards the conveying pipe. Before the raw materials are conveyed, the operator must first open the second control valve to ensure that the conveying channel is unobstructed. As the push plate advances, the resin raw materials flow into the mixing tank quickly through the conveying pipe under pressure. During the conveying process, the conveying amount of resin raw materials is monitored in real time by comparing the scale value of the raw material descent, ensuring that the two resin raw materials are accurately conveyed to the mixing tank in a predetermined ratio.

The utility model relates to the technical field of pneumatic actuators, and discloses a temperature self-adaptive cold-proof pneumatic actuator which comprises a pneumatic actuator body, a cold-proof mechanism is arranged at the bottom of the pneumatic actuator body, a fixed protection mechanism is arranged at the bottom of the cold-proof mechanism, and the pneumatic actuator body is arranged in the fixed protection mechanism. When the air temperature is reduced, the temperature sensor is started to enable the heating pipe and the small fan to start to work, heat is generated through the heating pipe and discharged to the top through the small fan to heat the pneumatic actuator body, it is guaranteed that the pneumatic actuator body cannot stop working due to low temperature, and the working efficiency of the pneumatic actuator body is guaranteed; the first air hole and the second air hole are formed, it can be guaranteed that hot air can be effectively transmitted to the position where the pneumatic actuator body is located, it is guaranteed that the hot air is fully diffused around the pneumatic actuator body, and the cold-proof efficiency is further guaranteed.