801results about How to "No waste" patented technology

The invention relates to a networking control method, device and system based on an internet-of-things intelligent heat supply technology, and is suitable for the technical field of intelligent heat supply. According to the method, user heat supply related parameters are input into a prediction model obtained through training under theoretical conditions, a prediction value is output, and environment offset parameters capable of performing sum representation on all complex parameters influencing the indoor heat supply temperature of a user are obtained through difference comparison between the prediction value and a corresponding actual value. The subsequent heating demand temperature value of the user is accurately compensated and corrected based on the obtained environment offset parameter, so that the corresponding heating compensation amount can be accurately reserved according to the heating temperature deviation caused by the influence of the environment parameter of the user when the heating primary side supplies heat, the heating is more accurate and reasonable, and the user experience is improved. The heat supply demand of the user is successfully guaranteed, heat supply resources are not wasted, and the intelligent heat supply efficiency is improved.

The invention discloses an insulator defect detection method and system based on RT-DETR improvement. The method comprises the following steps: collecting a disclosed insulator defect data set and obtaining an image as a data set through a video interception frame; the method comprises the following steps: carrying out improvement based on a target detection model RT-DETR, changing a backbone network into a StarNet star network to carry out feature extraction, carrying out further improvement, removing a P5 detection head, adding a P2 detection head, and improving a star convolution module in the StarNet star network; a multi-head attention mechanism is changed into a partial self-attention mechanism PSA, and further improvement is carried out to obtain an S-PSA attention mechanism module; a RepC3 convolution module is improved into a RepMob convolution module; combining the loss function by using Inner-IoU and CIoU to obtain an Inner-CIoU loss function, and carrying out loss calculation; and training the improved RT-DETR, verifying the improved RT-DETR to obtain an optimal weight, and loading the weight into the improved RT-DETR to carry out insulator defect detection. According to the invention, the defect detection is carried out on the insulator by using the improvement based on RT-DETR, so that the detection is more accurate and efficient.

The invention relates to the field of guardrail welding machining, and provides a double-end guardrail laser welding machine which comprises a guardrail weldment fixing mechanism arranged at the top of a horizontal rack. The laser welding device comprises two groups of five-axis servo modules, a laser and a laser welding head; the two five-axis servo modules of the same structure are symmetrically arranged on the left side and the right side of the horizontal rack, and each five-axis servo module comprises an X-axis servo module, a Y-axis servo module, a Z-axis servo module and a bidirectional servo rotating mechanism. And the welding wire feeding mechanism is arranged on the Z-axis servo module. The multi-dimensional arc welding device is characterized in that each laser welding head has five motion dimensions under the clamping of two groups of five-axis servo modules, and is compatible with a multi-dimensional arc welding function; an integral structure is adopted, so that the structure is stable, the integral structure does not shake during high-speed operation, and the working efficiency is high; the welding wire feeding mechanism is arranged on the Y-axis servo module and synchronously moves with the laser welding head in the three-dimensional space, and welding wire supply is stable and smoother.

The invention belongs to the technical field of cosmetics, and discloses a composition with tightening and anti-wrinkle effects as well as a preparation method and application thereof. The composition disclosed by the invention comprises the following components: a radix pseudostellariae extract and hydrolyzed ginsenoside. The radix pseudostellariae extract in the composition achieves the effects of tightening and resisting wrinkles by promoting generation of collagen and elastin, the hydrolyzed ginsenoside mainly has the effects of resisting oxidation, inhibiting expression of matrix metalloproteinase and preventing collagen degradation, and after the radix pseudostellariae extract and the hydrolyzed ginsenoside are combined, the composition has a better effect of inhibiting the activity of the matrix metalloproteinase, so that the effect of resisting wrinkles is achieved. The traditional Chinese medicine composition has the effects of promoting the generation of collagen and elastin, and has a synergistic effect, so that the traditional Chinese medicine composition has an excellent anti-aging effect.

The utility model discloses an energy-saving shoe material hot-pressing forming machine which comprises a protective frame, a hot-pressing body fixedly connected to the bottom of the protective frame, an operating mechanism fixedly connected to the front face of the hot-pressing body, a lower hot-pressing plate fixedly connected to the top of the hot-pressing body, a top seat fixedly connected to the top of the inner side of the protective frame, and a hydraulic rod fixedly connected to the top of the top seat. An upper hot pressing plate is fixedly connected to the bottom end of the hydraulic rod, an upper heating rod is fixedly connected to the front face of the upper hot pressing plate in a penetrating mode, a hot pressing mold is fixedly connected to the bottom of the upper hot pressing plate, sliding blocks are fixedly connected to the two sides of the upper hot pressing plate, and an infrared transmitter and an infrared receiver are fixedly connected to the inner wall of the inner side of the protection frame; according to the hot-pressing forming machine, a heating part can be heated to the required temperature as soon as possible, heat waste is avoided, energy conservation is facilitated, and the safety of the hot-pressing forming machine is improved through the arranged protective frame, the infrared transmitter and the infrared receiver.

The invention discloses automatic double-sided cleaning equipment for a nickel strap and an implementation method, relates to the technical field of cleaning equipment, and aims to solve the problems that sewage is temporarily left on the upper side surface of the nickel strap after spray washing, water is evaporated after drying, and a small amount of stains are temporarily left on the nickel strap, so that cleaning is not thorough. High-pressure water is conveyed into the liquid conveying pipe through the water pump, flows into the two sets of main flow channels through the liquid conveying transfer piece, flows into the liquid outlet transfer piece from the auxiliary flow channels and finally flows out of the liquid outlet transfer piece, and in the process that the high-pressure water circulates from the surface of the nickel strip, cleaned impurities on the surface of the nickel strip are brought out together. According to the nickel strap cleaning device, impurities on the surface of a nickel strap are cleaned more comprehensively, waste of water resources is avoided, meanwhile, due to the C-shaped design of the nickel strap, water attached to the surface of the nickel strap penetrating through the cleaning mechanism easily flows to the two sides of the nickel strap under the action of the gravity of the water, residual water stains on the surface of the nickel strap are further reduced, and the cleaning effect is improved.

The invention discloses a material head recycling device for plastic sealing strip extrusion, and relates to the technical field of plastic recycling. Comprising a recycling installation part, a discharging control part is installed on the recycling installation part, and a collecting part is installed on the recycling installation part; the collecting piece is used for collecting material heads; the discharge control piece is used for cooling the scraping material head; an extrusion guide piece is mounted on the collecting piece; the extrusion guide part is used for guiding and discharging an extruded material strip; a fragmentation control piece is mounted at the bottom of the collecting piece; according to the structure, the stub bar can be directly recycled and extruded again for use after being extruded once, so that the discharging quality is ensured, and meanwhile, the waste of the stub bar is avoided; the invention discloses a material head recycling device for plastic sealing strip extrusion, and aims to solve the problems that the existing material head recycling device for plastic sealing strip extrusion is inconvenient to mix, recycle and reuse material heads and particles in an extruder hopper, the material heads and the particles are recycled uniformly after being cut off, the material heads are wasted, and the economic cost is influenced by accumulation of a large number of material heads.

The invention discloses a digital twin service orchestration method, system and device, a storage medium and a product, and the method comprises the steps: analyzing a twin task request sent by a demand side, obtaining a twin service orchestration demand, requesting a target twin model conforming to a twin task according to the twin service orchestration demand, and performing orchestration to generate a corresponding twin service chain, and a twinning service is provided. As the corresponding twin service chains are generated according to different twin task requests, a parallel service mode is adopted, the twin service chains are dynamically arranged as required according to different service requirements, and accurate refined twin services are provided, so that the network digital twin system does not need to be constructed by occupying huge resources such as communication and computing power.

The invention discloses automatic spraying equipment for a surface layer of a long-strip-shaped steel member, which comprises a conveying mechanism, a plurality of groups of conveying frames, a spraying chamber, an annular frame and a spray head, and further comprises an annular spraying mechanism, the annular frame is hollow and is communicated with a liquid supply end through an outer column casing, and the annular spraying mechanism comprises a lining frame rotationally mounted on the inner side of the annular frame; the lining frame is driven by an outer driving structure, and the spray head is mounted on the inner side of the lining frame and is communicated with the interior of the annular frame; the inclined side guide mechanism comprises a mounting frame arranged at the front end or the rear end of the annular frame, the reinforcing steel bar penetrates through the center of the mounting frame, a rotating piece matched with the reinforcing steel bar is arranged on the inner side of the mounting frame, and the rotating piece is driven by an external structure.

The invention discloses a silicon nitride powder spreading and compacting device, and relates to the technical field of silicon nitride powder spreading and compacting devices.The silicon nitride powder spreading and compacting device comprises a main body, a frame is fixedly installed on the upper surface of the main body, a motor is fixedly installed on the lower surface of the frame, and an extrusion block is fixedly installed on the lower surface of the motor; an electric push rod is fixedly mounted on the side, close to the frame, of the main body, a cutting block is fixedly mounted on the side, close to the frame, of the electric push rod, a square groove is formed in the bottom of the cutting block, a feeding groove is fixedly formed in the right side of the main body, and a collecting device is arranged on the upper surface of the main body; materials attached to the surfaces of the extrusion blocks are collected, and the collected materials are poured into the collecting groove, so that the materials can be effectively utilized, waste is avoided, and meanwhile, the situation that the materials are wasted due to the fact that the shapes of the materials are changed when the materials are extruded due to excessive accumulation of the materials on the surfaces of the extrusion blocks can be prevented.

The invention relates to the technical field of production of fiber-reinforced thermoplastic composite prepreg and composite laminated plates thereof, in particular to a production method of high-strength polypropylene fiber-reinforced polypropylene resin unidirectional prepreg and a composite material. The method mainly comprises the following steps: straightly and tightly arranging and unfolding a certain number of polypropylene fibers, extruding a casting film from polypropylene resin through a screw, laminating and infiltrating the polypropylene resin and the polypropylene fibers, and pressing and coiling through a cold pressing roller to prepare the unidirectional belt. The one-way prepreg of the polypropylene self-reinforced composite material is paved according to a certain paving direction and thickness and then is subjected to hot pressing to prepare a polypropylene self-reinforced composite material laminated plate with a certain size and thickness. Or slitting the polypropylene self-reinforced composite material unidirectional prepreg, weaving the slit unidirectional prepreg with relatively narrow width, cutting and paving according to a certain size, or mixing and paving with a single-line prepreg tape, and performing hot pressing to form the polypropylene composite material laminated plate.

The invention relates to the technical field of electrode plate preparation, and particularly discloses a method for preparing a dry-method electrode plate through glue spraying and coating, and the method comprises the following steps: S1, respectively pouring dry-method powder into two feeding mechanisms; s2, vertically unwinding the current collector by an unwinding mechanism; s3, cutting the head ends of the two dry-method self-supporting films which are longitudinally symmetrical along the current collector by a preliminary compounding mechanism; s4, the two attached dry-method self-supporting films and the current collector enter a rolling mechanism to be rolled to form a pole piece; and S5, guiding the pole piece into a single-section drying oven by a guide roller II for drying. The head end of the dry-method self-supporting film is cut off through the head end cutter, and when the dry-method self-supporting film is compounded with a current collector in a rolling mode, the head end of the dry-method self-supporting film is in a flush state, so that the head end of the pole piece formed in a rolling mode is kept in a flush state, and when the pole piece is put into use in the later period, the head end of the pole piece does not need to be cut; therefore, waste of the current collector is avoided.

The invention discloses a central air conditioner energy-saving control system and method based on artificial intelligence, relates to the technical field of air conditioner energy-saving control, and solves the technical problems that in the prior art, when a central air conditioner operates, temperature detection evaluation cannot be conducted on the central air conditioner, and it cannot be guaranteed that the temperature detection performance of the central air conditioner meets the requirement. The marking module is used for marking a central air conditioner coverage area as a control area, obtaining a main circulation route and a secondary circulation route of the control area and determining an air supply point; taking the air supply point as a starting point and the main circulation route as a track, dividing the main circulation route into a plurality of sub-positions, and according to the sub-positions, inferring air supply point effects, high effects, energy-saving regulation and control, low effects and frequency conversion control so as to meet control requirements; temperature floating speed deviation information and temperature floating control area information are collected, and temperature detection analysis control is conducted according to information analysis.

The invention discloses a purification method and a purification device for crystallized magnesium, and relates to the field of magnesium metal smelting. The method comprises the following steps: under the protection of an inert atmosphere, firstly carrying out pressure-applying melting treatment on a magnesium material to be smelted, and then carrying out pressure-applying filtering treatment on a product obtained after the melting treatment, so as to complete the flux-free smelting process of the magnesium material. And meanwhile, the metal magnesium liquid and most of the oxide shells are separated by utilizing the liquidity difference between the liquid metal magnesium and the solid oxide shells. Compared with a conventional smelting process without pressure application, the method has the advantages that the melting rate of the crystallized magnesium can be remarkably increased, most of oxide impurities are removed, a series of pollution problems caused by flux use are solved from the source, and low-cost, high-efficiency and high-quality smelting of the crystallized magnesium is realized.

The present invention provides a gas safety release device for chemical equipment, belonging to the technical field of chemical equipment. It includes a main tank body component, a pressure relief tank body component, an external pipe component, a pressure relief assembly and a reflux assembly. The inner tank and the outer tank are arranged in an inner and outer double body. The external pipe component is connected to the cavity between the inner wall of the outer tank and the outer wall of the inner tank, and the temperature can be reduced. When the pressure of the chemical gas in the inner tank increases due to the increase in ambient temperature, the air relief valve core under the elastic support will be pushed, so that the air relief valve box and the pressure relief tank can be connected in one direction. The chemical gas in the inner tank can be temporarily stored in the pressure relief tank, and can synchronously drive the pneumatic wheel in the pneumatic box to rotate. The pneumatic wheel drives the rotation of the water wheel fan through the transmission mechanism, so that the cooling liquid in the cavity between the inner wall of the outer tank and the outer wall of the inner tank can flow, thereby improving the cooling effect; and after the pressure of the chemical gas in the inner tank drops to a certain value, the chemical gas temporarily stored in the pressure relief tank can also be refluxed into the inner tank through the reflux assembly.

The invention discloses automatic feeding equipment for a polyurethane prepolymerization reaction and a preparation process, and belongs to the field of polyurethane preparation. Comprising a reaction kettle, a feeding shell is mounted at the top of the reaction kettle, and a solution cavity is formed in the feeding shell; a driving motor is mounted at the top of the reaction kettle; a heat conduction valve plate is mounted in the shell of the reaction kettle; a sampling tube is arranged at the bottom of the reaction kettle, a blanking detection opening is formed in the bottom of the sampling tube, guide strips which are symmetrically distributed are mounted at the bottom of the blanking detection opening, and the guide strips and the axis of the sampling tube are arranged in the same direction; a sampling box is mounted on the guide strip, a closed elastic piece is mounted between the guide strip and the reaction kettle, and a steering plate is mounted at the connecting position of the sampling tube and the reaction kettle; when the sampling box is installed on the guide strip, the sampling box is suitable for extruding the closing elastic piece which is suitable for abutting against the steering plate. During sampling, the sampling box is installed, the internal feeding effect of the sampling pipe is synchronously achieved, sampling is convenient and fast, and pipeline residue waste is reduced.

The invention discloses an occlusion device for generating cervical occlusion pressure and a method of using the same. The plugging device comprises a suction cup, the lower portion of the suction cup is in an outer arc shape, and the middle of the suction cup is connected with a hysteroscope access plugging pipe. The upper end of the first air bag is connected with an air feeding pipe, the outer side of the air feeding pipe is connected with the outer side of the hysteroscope access plugging pipe, and the end, away from the first air bag, of the air feeding pipe penetrates through the suction cup and is connected with the second air bag. Under the action of the vacuum pump, air between the suction cup and the outer wall of the cervix uteri can be sucked out, at the moment, air pressure between the suction cup and the outer wall of the cervix uteri becomes low and is smaller than external atmospheric pressure, and air pressure difference is formed, so that the suction cup can be adsorbed to the outside of the cervix uteri, and after the suction cup is adsorbed to the outside of the cervix uteri, the effect of blocking the cervix uteri can be achieved; normal saline is prevented from flowing out of the cervix, and the stability of the suction cup can be improved under the action of the first air bag.

The invention relates to the technical field of organic silicon elastomers, and discloses a preparation method and equipment of high-brightness organic silicon elastomer gel, and the high-brightness organic silicon elastomer gel comprises the following components in parts by mass: 124 parts of hydrogen-containing silicone oil and 13 parts of vinyl MQ resin. According to the invention, polydimethylsiloxane and isoalkane in a certain mass ratio are used as carrier fluids, and the polydimethylsiloxane and the isoalkane act together, so that the obtained product has more excellent silky feeling, matte feeling, smearing spreadability and skin feeling durability, can provide lasting velvet-like smooth feeling for the product, can bring matte and soft-focus effects for the product, and can be used for preparing a soft-focus soft-focus product. According to the present invention, the product viscosity can be reduced, the refreshing non-greasy skin feeling can be provided for the product, the product can be used as the high transparent system, the good smearing spreading degree and the good water resistance can be provided, the thickening effect can be provided in the anhydrous formula and the water-in-oil formula, and the product stability can be improved.

The invention discloses an integer slot concentrated full-pitch flat wire winding structure and a flat wire motor, and relates to the technical field of motors. Each branch of each phase of the integral-slot concentrated whole-pitch flat wire winding structure comprises one or more coil units, each coil unit is composed of four coil groups, each of the first coil group and the third coil group comprises a same-layer hairpin, the second coil group comprises N / 2-1 cross-layer hairpins, and each cross-layer hairpin comprises N / 2-1 cross-layer hairpins. The two effective conductors of the cross-layer hairpin are located on the adjacent layers of flat wires in different grooves, the fourth coil assembly is obtained by rotating the second coil assembly by m stator grooves in the circumferential direction, and m is the phase number of the winding motor. According to the invention, the stator adopts an integral pitch winding and is matched with a concentrated winding scheme that the number of slots per pole per phase is 1, so that the motor can obtain the maximum winding coefficient; only N / 2 + 1 types of hairpins are needed, and the types of the hairpins are reduced, so that the purposes of reducing the processing difficulty, the assembly complexity, the manufacturing cost and the maintenance difficulty of the flat wire winding are achieved.

The present invention discloses a comprehensive auxiliary control system based on multiple parameters of a smart substation, which relates to the technical field of substations. The energy loss test module of the system calculates the stability factor Wdyz and preliminarily dynamically screens the number of taps to avoid unnecessary energy waste. The tap flexibility analysis module analyzes the system's response to load changes based on the number of taps after screening, and constructs an adaptation factor Syyz under conditions of different numbers of taps. This flexibility analysis can determine the system's ability to cope with load fluctuations under different numbers of taps. With the support of a multi-parameter balance auxiliary control module, by using convolutional neural network technology, the system can combine the stability factor Wdyz and the adaptation factor Syyz to construct a multi-parameter balance model and obtain a balance prediction coefficient Pgxs, so as to more accurately grasp the state of the system between stability and flexibility. Through secondary screening operations, the system can adaptively adjust the tap settings.

The invention discloses a solid-liquid separation method for low-odor water-soaked manure, which specifically comprises the following steps: acting on water-soaked manure with the water content of 80-99.9% by adopting an electrode plate with conductive and filtering effects, enabling charged large particles in the water-soaked manure to do directional movement towards one side under the action of an electric field, filtering and recovering a liquid phase through the electrode plate, and recycling the liquid phase through the electrode plate. Therefore, fine particulate matters with the particle size of more than 0.1 mu m in the blistered manure are efficiently separated in a low-odor manner; according to the method and the device disclosed by the invention, the fine particulate matters in the blister dung can be efficiently separated, the odor emission content in the treatment process is low, the content of separated liquid-phase pollutants is also greatly reduced, and the removal rates of COD, TP, ammonia nitrogen and turbidity are 75%, 80%, 20% and 90% or above.

The invention discloses camellia oleifera branch polysaccharide which is prepared by the following steps: adding absolute ethyl alcohol into dried and crushed camellia oleifera branches, heating and refluxing, then mixing with deionized water, extracting, then carrying out solid-liquid separation, collecting supernate, carrying out deproteinization operation and dialysis treatment, and drying to obtain the camellia oleifera branch polysaccharide. Under the extraction condition, the extraction rate is increased to about 2%, and the yield is greatly increased. Moreover, compared with a common three-phase extraction method on camellia oleifera flowers and leaves, many chemical waste materials can be generated. And the adopted extraction method does not cause waste of excessive chemical reagents. Moreover, the camellia oleifera branches are used for polysaccharide extraction, which is more different from common waste caused by direct incineration or burying, so that the recovery value and the utilization value of the camellia oleifera branches are greatly improved.

The invention discloses a universal serial bus (USB) sharing device and a communication transparent transmission method thereof. The USB sharing device establishes a corresponding relation between a downloading USB endpoint on one side and an uploading USB endpoint on the other side; creating pipeline endpoints, the pipeline endpoints receiving the shared data downloaded by the first computing device, different applications of the shared data specifying different pipeline endpoints; and transmitting the shared data from the pipeline endpoint to the uploading USB endpoint on the other side according to the corresponding relationship, and uploading the shared data to the second computing device through the uploading USB endpoint on the other side. According to the invention, a shared data transparent transmission effect can be realized, the transmission efficiency is high, and the expandability is strong.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a modification method of a copper-based catalyst for electro-catalysis carbon dioxide reduction and a product and application of the copper-based catalyst. The modification method comprises the following steps: (1) respectively preparing a first solution containing copper ions and halogen ions and a second solution containing hydroxyl ions; (2) putting the copper-based material into the first solution, reacting, generating a cuprous halide phase on the surface of the copper-based material, and taking out the copper-based material; and (3) putting the copper-based material taken out in the step (2) into the second solution, and reacting to generate cuprous oxide in situ. According to the method, a copper-based material is subjected to a neutralization reaction to generate cuprous chloride, and then a reconstruction reaction is performed to generate cuprous oxide, so that in-situ preparation of the high-adaptability nano cuprous oxide particles is successfully realized, and the cuprous oxide can be used for efficiently reducing carbon dioxide or carbon monoxide into a multi-carbon product; and high selectivity, good structural stability, long-time operation stability and large-current operation capability are realized.

The utility model relates to the technical field of wall crack repairing, and discloses a wall crack grouting device which comprises a cart, a slurry storage tank is arranged on the right side of the upper end of the cart, a grouting mechanism is arranged on the left side of the upper end of the cart and used for pumping slurry in the slurry storage tank, and a grouting pipe is arranged on one side of the grouting mechanism and used for pumping slurry in the slurry storage tank. A collecting mechanism is arranged at the upper end of the outer side of the grouting pipe and used for collecting slurry overflowing during crack repairing, an adjusting mechanism is arranged at the lower end of the outer side of the grouting pipe and used for adjusting the using position of the collecting mechanism, and the grouting mechanism comprises a material pumping pump, a material pumping pipe and a discharging pipe; the material pumping pipe is arranged at the input end of the material pumping pump; when the wall crack repairing device is used, overflowed slurry can be collected and treated when a wall crack is repaired, so that the slurry is not easy to drip on the wall to pollute the wall, the waste of the slurry is not easy to cause, and the practicability of the device is greatly improved.

The invention discloses a method for determining control parameters of an ammonia-coal mixed combustion system and a related device and system, and relates to the field of ammonia-coal mixed combustion systems.The method comprises the steps that the actual value of the ammonia input flow, the actual value of the air input flow, the actual value of the nitrogen oxide content and the actual value of the ammonia remaining amount are collected; utilizing the mechanism model to obtain a predicted value of the nitrogen oxide content and a predicted value of the residual ammonia gas; determining the range of the nitrogen oxide content and the range of the residual amount of ammonia gas; training the neural network model by using the range of the nitrogen oxide content and the range of the residual ammonia gas to obtain an optimal excess air coefficient determined by the neural network model; obtaining a target ammonia gas input flow and a target air input flow corresponding to the optimal excess air coefficient; and determining the target ammonia gas input flow and the target air input flow as control parameters of the ammonia-coal mixed combustion system. The control parameters of the ammonia-coal mixed combustion system can be quickly and accurately determined, and emission of nitric oxide and ammonia gas is reduced.

The utility model relates to an adsorption and desorption and liquid nitrogen cryogenic system for oil gas recovery treatment, which comprises a shallow cooling unit, an adsorption and desorption unit and a liquid nitrogen cryogenic recovery unit, the shallow cooling unit is used for primarily cooling oil gas to separate a gas phase and a liquid phase, and the separated gas phase enters the adsorption and desorption unit through a fan to remove VOCs (Volatile Organic Compounds); and then the residual gas enters the liquid nitrogen cryogenic recovery unit through an extraction pump to obtain a residual liquid phase. Liquid nitrogen is used for deep cooling, so that energy consumption of the device is greatly reduced, the using amount of the liquid nitrogen can be adjusted according to the actual temperature requirement, nitrogen obtained after the liquid nitrogen is gasified is not polluted and has certain pressure, and the nitrogen passes through the nitrogen storage tank, then is adjusted to be slightly higher than the pressure of the nitrogen pipe network through the valve group and enters the nitrogen pipe network of the tank field to be recycled; the device is used for nitrogen sealing and purging of a storage tank, nitrogen purging and vacuum breaking of an adsorption and desorption unit of the system and the like.

The invention relates to the field of tea beverages, in particular to a litsea coreana beverage and a preparation method thereof.The litsea coreana beverage is composed of litsea coreana soup, baking soda, vitamins and water, the sugar degree of the litsea coreana beverage is 0.04-0.17%, and the pH value of the litsea coreana beverage is 5.5-6.5. The problems that an existing hawk tea beverage lacks the characteristic flavor of hawk tea and contains many additives can be solved.

The invention relates to a dynamic inventory checking method and device, electronic equipment and a storage medium. The dynamic inventory checking method comprises the following steps: obtaining an in-out frequency Fi of a target cargo i and calculating a frequency weight fi; the total value Vi of the target goods i is obtained, and the total value weight vi is calculated; obtaining the remaining shelf life Si of the target goods i and calculating the shelf life weight si; calculating a checking period Ti of the target goods i according to the frequency weight fi, the total value weight vi and the shelf life weight si; and the target goods i periodically perform the inventory task according to the inventory period Ti of the target goods i. According to different characteristics of each kind of goods, the inventory cycle and the priority of the goods are calculated, and different inventory strategies are generated for each kind of goods, so that each kind of goods can have a corresponding inventory cycle according to own characteristics. Compared with a traditional fixed inventory cycle mode, the method can enable the inventory of the goods to be more accurate, improves the inventory efficiency, and does not cause the waste of resources.

The invention relates to the technical field of moso bamboo disease and pest control, and provides a backpack type movable quantitative liquid injector which comprises a back barrel used for containing liquid medicine. The water pump is arranged on the back barrel, and a water inlet of the water pump is communicated with the liquid medicine in the back barrel; the control end of the time relay module is electrically connected with the water pump, and the time relay module is used for controlling the starting duration of the water pump; one end of the pesticide supply pipe is communicated with a water outlet of the water pump; and the other end of the medicine supply tube is communicated with the injection needle. By means of the technical scheme, the problems that in the prior art, the carrying amount of liquid medicine is small, and the injection amount of the liquid medicine every time is unstable are solved.