282results about How to "No maintenance" patented technology

The invention discloses an optimization system for intelligent operation and maintenance of a new energy generator set. The optimization system comprises a data acquisition module for acquiring operation state data and external environment data of the generator set through a sensor network; the data processing and storage module is used for carrying out preliminary data processing by utilizing edge computing equipment; the algorithm model module comprises a maintenance optimization model and a dynamic energy efficiency optimization model based on reinforcement learning; the invention discloses an optimization method for intelligent operation and maintenance of a new energy generator set. The optimization method comprises the following steps: S1, data acquisition and preprocessing; s2, constructing a maintenance optimization model based on reinforcement learning; s3, constructing a dynamic energy efficiency optimization model; s4, fault prediction and maintenance strategy optimization; and S5, system integration and feedback execution. According to the method, the operation parameters of the generator set are adjusted in real time, it is guaranteed that the generator set is always in the optimal operation state under different external environment conditions, and the dual purposes of maximum utilization of resources and minimum energy consumption are achieved.

The concentrated light source optical fiber distributed lighting system comprises a concentrated light source module, an optical fiber transmission unit and a lighting terminal, and the concentrated light source module is integrated with a control unit; the optical fiber transmission unit is connected with the concentrated light source module and the lighting terminal; the concentrated light source module comprises a light source, an optical fiber coupler and a cooling fan. A use method of the concentrated light source optical fiber distributed illumination system comprises the following steps that S1, illumination intensity is input into an MCU through a human-computer interface, light is transmitted to an illumination terminal through an optical fiber transmission unit, and the illumination terminal scatters the light and projects the light to an illumination place; s2, the temperature sensor extracts a laser / LED module temperature signal and sends the laser / LED module temperature signal to the MCU; s3, the fan driving power supply judges whether to supply power to the cooling fan or not according to the signal of the MCU, and the cooling fan cools the concentrated light source module; and S4, the illuminance sensor collects the illuminance of the illumination target place and feeds back the illuminance to the MCU, and the laser / LED module is driven to emit light with the corresponding intensity.

The patent of the present invention discloses a special on-load voltage regulating switch for distribution transformer and an on-load voltage regulating distribution transformer. The switch includes a mounting main board, an insulating back plate, a driving mechanism component, a selection switch component, a switching switch component, and a transition element. The driving mechanism component includes a stepping motor, a gearbox, a bevel gear, a driving gear, and a square shaft. The rotational motion of the stepping motor is transmitted to the driving gear by means of the gearbox and the bevel gear. The driving gear drives the square shaft to rotate, and then drives the selection switch component and the switching switch component to move, completing the conversion of the voltage regulating gear. The on-load voltage regulating switch is miniaturized, and is installed in the distribution transformer without changing its conventional shape and volume. Frequent voltage adjustment of the distribution transformer under load is realized, the power supply voltage is stabilized, the loss is reduced, and a wide range of multi-gears and refined voltage regulation are realized. At the same time, the life cycle of the switch is equal to the life cycle of the distribution transformer body, and no maintenance is required during its life cycle, which improves the reliability of the on-load voltage regulation of the distribution transformer.

The invention discloses a high-frequency electronic scale inhibition and removal system, and relates to the technical field of scale inhibition and removal equipment of water devices, the high-frequency electronic scale inhibition and removal system comprises a plurality of single equipment arranged outside a water pipeline and used for scale inhibition and removal, each single equipment comprises a body and a conduction ring, and an emission control module, an electromagnetic conduction module, a communication module and a monitoring module are arranged in the body; a display screen is arranged outside the body, the conduction ring penetrates through the body and surrounds the water pipeline, the conduction ring comprises a plurality of connecting blocks, and the connecting blocks are connected through fastening bolts; additional magnetic moment, additional energy and an additional electric field are caused in water through high-frequency electromagnetic waves, a microcrystalline molecular structure separated out of water treated by the electromagnetic waves is loose, calcium carbonate of the crystal lattice is not prone to being attached to the pipe wall, the scale inhibition effect is achieved, more small water molecule clusters or monomer water molecules are generated, the permeation effect is enhanced, and the corrosion resistance is improved. And the scale inhibitor is easier to go deep into a scale layer to disintegrate and loosen scale, and gradually falls off under the impact of water flow, so that scale inhibition and removal are realized.

The invention discloses a new energy model data processing method, a related device and a storage medium, and the method comprises the steps: obtaining multi-source heterogeneous data of each stage of equipment unit of an energy storage power station, and constructing a digital twin simulation model corresponding to each equipment unit through the multi-source heterogeneous data; associating the digital twinborn simulation models, corresponding equipment entities in the energy storage power station and data acquisition equipment on the equipment entities, and performing scene construction by using the digital twinborn simulation models based on layout information of the equipment entities to obtain a digital twinborn scene of the energy storage power station; performing data association on each digital twinborn simulation model in the digital twinborn scene of the energy storage power station and corresponding data acquisition equipment, and establishing a data transmission channel; and updating the digital twinborn scene of the energy storage power station in real time and monitoring and managing each equipment entity according to an equipment management method by using the data of each equipment entity acquired by each data acquisition equipment in real time.

The utility model discloses a wet type brake land leveler rear axle for mine operation, which comprises a first-stage speed reduction assembly, second-stage speed reduction assemblies and a third-stage speed reduction assembly, the second-stage speed reduction assemblies are arranged at the left end and the right end of the first-stage speed reduction assembly, and rotation bearing assemblies are arranged in the second-stage speed reduction assemblies. A three-stage speed reduction assembly is installed at the outer end of the balance box body, a sealing structure, a hardening adjusting sleeve, an auxiliary assembly and a friction plate are installed in the three-stage speed reduction assembly, the three-stage speed reduction assembly is connected with a tire through a connecting disc and a bolt assembly, and the three-stage speed reduction assembly, an output chain wheel, an output shaft disc, a brake sealing cover, a brake shell and a brake disc seat are connected with a motor. And the output chain wheel is in spline connection with the output shaft disc. The wet-type braking land leveler for mine operation is small in rear axle abrasion, capable of meeting the swing requirement of the balance box body, convenient to assemble and maintain, convenient to disassemble and assemble tires, low in built-in abrasion, free of maintenance, large in braking torque, long in service life, safer and more reliable.

The invention discloses a coal dust influence suppression method for coal mine gas laser detection and a detection device, and the method comprises the steps: extracting gas in a coal mine goaf through a gas pump and a beam tube of the coal mine gas laser detection device, and detecting a characteristic absorption spectrum of the gas in the goaf by adopting a TDLAS technology; correcting a second harmonic signal and a peak value in the characteristic absorption spectrum by considering the attenuation influence of the coal dust in the goaf gas on the second harmonic signal of the laser penetrating through the goaf gas; and obtaining the accurate concentration value of each component gas in the goaf gas by using the corrected second harmonic signal peak value. According to the invention, the influence of coal dust on gas concentration detection can be greatly reduced, the sensitivity of gas detection is improved, and good detection effect and precision can be achieved.

The invention relates to a seeding device for saffron crocus planting, and aims to realize an efficient, accurate and automatic seeding process, the device comprises a blanking plate, a plurality of seeding mechanisms and a conveying system, each seeding mechanism is provided with a guide hopper, a plurality of brackets, an upper roller and a lower roller, the rollers are in contact with a conveying belt, and the conveying belt is provided with planting sheets; the saffron crocus corm sowing device is used for bearing and conveying saffron crocus corms, the device drives the rolling wheels and the conveying belt to rotate synchronously through the motor, stable conveying and accurate sowing of the saffron crocus corms are achieved, automation and high efficiency of the sowing process are achieved, the sowing efficiency is remarkably improved, and the labor intensity of workers is reduced; through accurate corm positioning and conveying, the integrity of the bud ends of the corms is guaranteed, and the germination rate and the growth quality after planting are improved; a stable and reliable conveying system and an optimized soil treatment mechanism are adopted, so that the continuity of the seeding process and the uniformity of soil coverage are ensured.

The invention belongs to the technical field of automatic sorting, and particularly relates to building waste reclaimed material automatic sorting equipment and method.The equipment comprises a vibrating feeder, a plurality of funnel-shaped material distribution grooves are formed below an ultrasonic atomization spraying device side by side, a belt conveyor is used for conveying building waste crushed materials, and the vibrating feeder is used for feeding the building waste crushed materials; a fluorescence detection box is arranged above the belt conveyor, connecting columns in one-to-one correspondence with the funnel-shaped material distribution grooves are arranged in the fluorescence detection box, ultraviolet lamps are arranged on the connecting columns, and photosensitive sensors are arranged on the rear sides of the ultraviolet lamps. According to the invention, through cooperation of fluorescence recognition feedback and high-pressure gas, building waste crushed materials are automatically sorted, building waste materials of different substances with similar density, size, color, shape and the like can be finely sorted, and the device has the characteristics of sensitive reaction, accurate distinguishing, high precision and the like.

A flow velocity measuring tube, a main control module, a communication module and a lithium battery are all installed on a sinking frame, the sinking frame sinks into a riverbed and enables the flow velocity measuring tube to be in the water flow direction, and the flow velocity measuring tube is a reducer tube and comprises a first tube part and a second tube part; the pipe diameter of the first pipe part is larger than that of the second pipe part in the water flow direction, pressure sensors are arranged in the circumferential direction of the first pipe part and the circumferential direction of the second pipe part, the lithium battery provides electric energy for the pressure sensors, the main control module and the communication module, and the floating body floats on the water surface and is fixed to the sinking frame through a connecting rope. The communication module and the pressure sensor are connected with the main control module. Based on the Bernoulli principle, high-precision simultaneous measurement of the flow velocity and the water level of the river is realized by adopting a differential pressure measurement mode. The sensor is simple in design structure, clear in principle, free of interference and stable in data.

The present invention is a contact / non-contact force-magnetic dual-mode sensing sensor based on a magnetostrictive film. The sensor comprises a sensitive layer, a conversion layer, a conversion circuit and an excitation power supply; the sensitive layer is a magnetostrictive film, the conversion layer is a three-layer flexible graphic circuit, the top layer of the three base layers of the FPC is covered with a copper layer, and the two lower base layers are respectively provided with a pickup coil and an excitation coil; the pickup coil is connected to the conversion circuit, and the excitation coil is connected to the excitation power supply; the copper layer is connected to the ground wire; the sensitive layer is deposited on the top copper coating of the conversion layer. The present invention can directly pick up the magnetization state change in the magnetostrictive film without a mechanical response process, and has the excellent performance of high sensitivity, short response time and recovery time, good compatibility, and full-range perception.

The invention provides a fan blade self-energy-taking lightning current monitoring device and method.The fan blade self-energy-taking lightning current monitoring device comprises an induction triggering unit, the induction triggering unit is composed of a passive coil, and the passive coil is connected with a blade grounding down lead used for lightning current drainage; the induction trigger unit is connected with the lightning current recording unit and the wireless communication unit. The lightning current wave recording unit is used for collecting lightning current waveforms passing through a blade grounding down lead and storing the lightning current waveforms in a wave recording device. The wireless communication unit is used for returning lightning current time domain waveforms to maintenance personnel; the lightning current wave recording unit and the wireless communication unit are connected with the self-energy-taking power supply unit at the same time, and the self-energy-taking power supply unit is used for converting kinetic energy of the blade into electric energy and driving the lightning current wave recording unit and the wireless communication unit to work normally. According to the device and the method, the defects in the prior art can be overcome, the lightning current of the fan blade can be accurately monitored and recorded, the equipment installation and maintenance operation is simplified, and the operation safety and the management efficiency of a wind power plant are improved.

The utility model discloses an external liquid seal desulfurizing tower overflow device which comprises a desulfurizing tower main body, an inlet flue is connected onto the desulfurizing tower main body, an overflow port is arranged on the tower wall of the desulfurizing tower main body, the overflow port is connected with an overflow inclined pipe, an included angle alpha is formed between the overflow inclined pipe and the horizontal plane, the upper end of the overflow inclined pipe is connected with a discharge pipe, and the lower end of the discharge pipe is connected with a liquid outlet. The lower end of the discharge pipe is inserted into the liquid level of the liquid collecting pit, the liquid collecting pit is located on the lower portion of the discharge trench, and nozzles are arranged on the periphery of the bottom of the liquid collecting pit and connected with a process water pipe. The overflow device is simple in structure, the overflow inclined pipe is obliquely arranged without scaling, and the overflow device is maintenance-free; the overflow pipe is balanced with the pressure in the tower, and easy-to-bubble substances floating on the liquid level directly overflow and are discharged, so that the problem of bubble overflow of slurry is thoroughly solved, the field environment quality is improved, the labor intensity is reduced, and the material consumption is reduced.

The invention relates to an insulating flame-retardant automatic fire extinguishing paste and a preparation method thereof. The insulating flame-retardant fire extinguishing patch comprises a bottom film, an adhesive layer and an insulating flame-retardant layer, the insulating flame-retardant layer is prepared from the following components in parts by weight: 20 to 60 parts of perfluoro-2-methyl-3-pentanone microcapsules, 20 to 30 parts of polydimethylsiloxane, 0.1 to 5 parts of magnesium hydroxide, 0.1 to 5 parts of triphenyl phosphate, 0.5 to 5 parts of tributyl phosphate, 0.1 to 5 parts of tris (2-ethylhexyl) phosphate, 0.2 to 5 parts of tris (2, 3-dichloropropyl) phosphate, 0.2 to 5 parts of tetrabromobisphenol A epoxy resin, 0.5 to 3 parts of antimony trioxide and 0.1 to 5 parts of borate. 0.1 to 5 parts of dichlorobromomethane and 0.1 to 5 parts of trichlorobromomethane. The insulating flame-retardant fire extinguishing paste is easy to install, does not need maintenance, actively extinguishes fire when a fire occurs in the initial stage, can achieve the effect of multiple times of fire extinguishing, can effectively prevent reburning and fire expansion, and is safe, green and environmentally friendly.

The utility model provides a crane with a weighing alarm function, belongs to the technical field of port cranes, and aims to solve the problems that a steel cable in a hoisting mechanism of the conventional crane with the weighing alarm function is corroded and the maintenance process of the steel cable is relatively tedious. Comprising a bridge body. The running trolley is connected into the bridge main body in a sliding manner; the driving mechanism is in bolted connection with the upper part of the running trolley; the lifting mechanism is in bolted connection with the upper part of the running trolley; the steel cable main body is wound in the lifting mechanism; the hoisting and weighing hook is fixedly mounted in the steel cable main body; the fixed frame is in bolted connection with the bottom of the travelling trolley; the cleaning mechanism is arranged in the fixed frame; and the oil conveying mechanism is arranged in the fixed frame. The device has the advantages of being convenient to clean and maintain, reducing corrosion and the like.

The utility model belongs to the field of batteries, and particularly relates to a busbar and a battery pack. The busbar comprises a plate-shaped busbar main body; n electric connection areas and n-1 fusing areas are arranged on the plate-shaped busbar main body along the axial direction of the plate-shaped busbar main body; the electric connection areas and the fusing areas are alternately arranged one by one, the n electric connection areas and the n single batteries are in one-to-one correspondence, and each electric connection area is used for being connected with a polar terminal, located on the same side, of the corresponding single battery in the battery pack; and the overcurrent area of the fusing region is smaller than that of the electric connection region. When any single battery is short-circuited, the fusing area connected with the electric connection area of the single battery is rapidly fused at high temperature generated by large current, so that the single battery is disconnected, the influence of short circuit on normal use of other single batteries is avoided, the whole battery pack is protected, and the safety of the battery pack is improved; the whole battery pack does not need to be maintained or replaced due to damage of individual single batteries, so that the maintenance cost is saved.

The invention discloses a photovoltaic panel cleaning device and aims to provide a photovoltaic panel cleaner which is high in cleaning efficiency, good in cleaning effect, high in automation degree and capable of monitoring the state of a photovoltaic panel and a control method of the photovoltaic panel cleaner. The power generation efficiency of the photovoltaic panel is detected through the control system, on the basis that the cleaning robot cleans the photovoltaic panel at the fixed frequency, the cleaning frequency is additionally increased according to the change of the power generation efficiency of the photovoltaic panel, the power generation efficiency of the photovoltaic panel is guaranteed, and meanwhile resource waste caused by too frequent cleaning can be prevented; and meanwhile, the monitoring system can replace manual work to confirm the cleaning effect after the cleaning robot completes cleaning, the cleaning effect is checked and confirmed under the condition that no person exists, the detection process can be shortened, and the photovoltaic power station cleaning system and method are suitable for the technical field of photovoltaic power stations.

The invention relates to a steel coil for a photovoltaic support and a preparation method of the steel coil. The preparation method comprises the steps that a continuous casting blank is obtained; rolling the continuous casting billet to obtain a hot rolled steel strip; coiling the steel strip into a steel coil; the continuous casting billet is prepared from the following components in percentage by mass: 0.02 percent to 0.04 percent of C, 0.76 percent to 0.85 percent of Si, 0.71 percent to 0.80 percent of Mn, 0.076 percent to 0.085 percent of P, 0.0071 percent to 0.0080 percent of S, 0.13 percent to 0.18 percent of Cu, 2.2 percent to 2.4 percent of Cr, 0.046 percent to 0.055 percent of Ti, 0.23 percent to 0.27 percent of Als, 0.25 percent to 0.28 percent of Alt and the balance of Fe and inevitable impurities. The steel coil prepared by the invention can better meet the new development requirements of the photovoltaic bracket.

The present invention belongs to the field of nuclear power plant maintenance technology, and specifically relates to a device for cleaning the pipe opening of an electric heating element of a voltage stabilizer electric heater, the device comprising: an alloy cutter head and a fixture, the alloy cutter head comprising: a blade surface, a chip removal groove and a cutter seat, the fixture comprising: a bayonet seat, a connecting rod and a chuck; the alloy cutter head is located above the fixture, multiple groups of spiral chip removal grooves are evenly arranged on the outer edge of the alloy cutter head, multiple groups of blade surfaces are evenly arranged on the upper end face of the alloy cutter head, the cutter seat is connected to the lower end face of the alloy cutter head; the bayonet seat is connected to the upper end of the connecting rod, the chuck is connected to the lower end of the connecting rod; the cutter seat and the bayonet seat are detachably connected. The device of the present invention can quickly clean the sealing material in the pipe opening of the electric heating element without damaging the terminal or other obstacles welded at the end of the lead rod, saving time and effort.

The anti-slip device and tubing string are characterized by comprising an integrated U-shaped injection valve, an integrated U-shaped injection control valve, tubing, etc. Several integrated U-shaped injection valves spaced several meters apart are connected to the tubing string, and multiple integrated U-shaped injection control valves spaced several meters apart are connected to the tubing string, forming the anti-slip device and tubing string. Within the anti-slip device and tubing string, there are several U-shaped injection ports and multiple channels, as well as several upward-vertical-downward-vertical-upward U-shaped channels and gas-liquid mutually sealed end faces, forming a gas-driven liquid flow pattern. This prevents liquid backflow and slippage while retaining the rising gas. The channels of the integrated U-shaped injection control valve are used to introduce gas from outside the integrated U-shaped injection control valve into it to reduce the density of the fluid passing through it. This achieves the purpose of lifting, producing, and discharging deep-well liquids with lower gas pressure and volume, preventing liquid slippage and backflow, and improving the efficiency of gas lift liquid production and discharge.

The invention relates to an epoxy resin pouring type transformer with built-in microcirculation cooling channels and a heat dissipation method of the epoxy resin pouring type transformer, and belongs to the technical field of power transformers. The epoxy resin pouring type transformer comprises an iron core, a low-voltage winding, a high-voltage winding and a heat dissipation shell, the low-voltage winding and the high-voltage winding are completely impregnated and wrapped by an epoxy resin composite material through a vacuum pouring process, an integrated epoxy resin pouring body is formed after curing, and a three-dimensional communicated bionic microcirculation cooling channel network is arranged in the epoxy resin pouring body; the heat dissipation shell is in close contact with the outer surface of the epoxy resin pouring body through the high-heat-conductivity insulating medium. According to the invention, the heat dissipation efficiency can be remarkably improved, and a cooling medium (air) is directly guided to a microscopic area around the winding conductor through a three-dimensional communicated and tree-shaped fractal bionic microcirculation cooling channel network, so that the effective heat exchange area and the heat exchange strength are greatly increased, and internal heat can be accurately and efficiently taken away.

The invention discloses an intelligent water meter and a water meter metering data transmission method and system, which are applied to the field of intelligent water meters and comprise the steps that when water flow pushes an impeller to rotate, a permanent magnet generates a periodic alternating magnetic field; the magnetic induction energy taking element is used for generating pulse energy when the periodic alternating magnetic field is generated; the water flow meter is used for obtaining water flow metering data; the energy conditioning module is used for processing the pulse energy to obtain electric energy with stable voltage; the electric energy is used for supplying power to the storage module, the data identification module and the wireless transmission module; the storage module is used for storing water flow metering data; and the wireless transmission module is used for transmitting the water flow metering data in the storage module to a client. Electric energy generated by the magnetic induction energy taking element is used for supplying power to the wireless transmission module, the data identification module and the storage module, and battery-free water meter metering and data transmission are achieved. And a battery-free, maintenance-free and power-consumption-free solution is provided for the flow metering terminal.

The utility model discloses a laser cutting device, and belongs to the technical field of cutting equipment. According to the laser cutting device, the to-be-cut strip material is conveyed to the cutting table through the feeding mechanism, and the height of the laser galvanometer assembly is adjusted through the laser adjusting driving piece, so that laser emitted by the laser galvanometer assembly can cut the to-be-cut strip material on the cutting table. Loss caused by increase of the use frequency is avoided, the cutter does not need to be maintained and replaced, sheet materials cut by laser are high in consistency, and powder falling and burrs can be reduced; and meanwhile, dust above the cutting table and on the cutting table is adsorbed through the first dust suction assembly and the second dust suction assembly correspondingly, the dust removal effect is guaranteed, then the dust is prevented from influencing products, and the product quality is guaranteed.

The utility model provides a single line air suction type seed sowing fan, including zinc plate upper shell, fan blade, air guide wheel, motor body shell, double balanced axle, stator, rotor cover, PCB board, magnet cover, white conductor, blue conductor and yellow conductor, air guide wheel is nested in galvanized sheet upper shell inside lower end through a plurality of screws, fan blade is encapsulated between zinc plate upper shell and air guide wheel, and fan blade is fixed in double balanced axle outside upper end through fan blade flange nut and gasket, this design has solved the problem that the existing seed sowing fan often exists low efficiency, easy to block, maintenance frequently, short life etc. For example, the traditional fan motor is not high in efficiency, dust and moisture are easy to enter the bearing and cause failure, and the problems of insufficient air volume and air pressure, the single line air suction type seed sowing fan structure compact, high efficiency of the utility model design is applicable to various brand seed sowing device, has improved the reliability and economy of sowing operation.

The present invention relates to a non-powered decelerating magnetic roller for preventing material collision, comprising a coaxial cylinder (1) and a central axis (2), the central axis (2) being a hexagonal axis, a bearing seat assembly (3) being respectively arranged at both ends of the cylinder (1), a group of tooth claws (31a) being arranged on the side of the bearing seat assembly (3) close to the cylinder (1), a first punching ear (4) and a second punching ear (5) being sequentially connected to the central axis (2) from left to right, a return spring (6) being sleeved on the left side of the central axis (2), the return spring (6) being arranged between the first punching ear (4) and the bearing seat assembly (3); a magnetic damper (7) being arranged on the right side of the central axis (2), the tooth groove (79a) at the right end of the magnetic damper (7) being meshed with the tooth claw (31a) of the bearing seat assembly (3). The present invention has the advantage of providing a buffering function in the process of material conveying, thereby preventing the materials from colliding with each other due to the speed difference formed when the materials are affected by their own weight.

The invention relates to the technical field of maintenance management, and provides a maintenance management method for equipment, and the method comprises the steps: obtaining a maintenance period of the equipment; when the maintenance time limit is reached, corresponding maintenance operation is executed on the equipment according to the length of the maintenance period and the maintenance time, and / or parts of the equipment are replaced when the parts break down; and adjusting the next maintenance time of the equipment according to the execution times of the maintenance operation and the part grade of the equipment. The maintenance period and the maintenance operation of the equipment are reasonably designed, and the maintenance operation is executed on the equipment at proper time, so that the equipment is prevented from being broken down or damaged.

The utility model discloses a kind of gas-liquid two-phase flow wide gas-liquid ratio and wide-range measurement system, belong to oil-gas field multiphase flow measurement technical field, including flow computer, separation component, fluid inlet pipeline and fluid outlet pipeline, the separation component is communicated with fluid inlet pipeline, liquid level meter and inlet pressure gauge are equipped on the separation component, gas phase pipeline and liquid phase pipeline respectively communicated with its inside are equipped on the separation component, liquid level control mechanism is equipped in the separation component, the liquid level control mechanism is used to close separation component and gas phase pipeline passage when liquid level in separation component rises, the one end of gas phase pipeline and liquid phase pipeline away from separation component is communicated with fluid outlet pipeline, gas phase flowmeter is equipped on the gas phase pipeline, liquid phase flowmeter and liquid path valve are equipped on the liquid phase pipeline.The utility model can select different measurement mode according to different working conditions, ensure the accuracy of measurement.

The invention relates to the field of microalgae culture, in particular to a solid microalgae-containing composition for culturing fresh microalgae as well as a preparation method and application of the solid microalgae-containing composition. The composition containing the solid microalgae and used for culturing the fresh microalgae comprises live microalgae cells and food-grade gel. The viable microalgae cells are algae species with an appropriate pH value of 6 to 8.2 and / or algae species with an appropriate pH value of 8.3 to 13. The food grade gel is insoluble in the culture medium of microalgae and can support the growth of live microalgae cells. The composition containing the solid microalgae is aseptically packaged in the soft photobioreactor, and can be preserved for a long time. By utilizing the composition containing the solid microalgae disclosed by the invention, the sanitary fresh microalgae which can be directly eaten can be easily prepared by residents. According to the method, the sanitation problem of preparing the fresh microalgae by an existing liquid culture process is solved, and the tedious processes of harvesting algae cells, washing algae mud, cleaning and maintaining a culture device and the like in liquid culture can be avoided.

This invention relates to a commercially compatible and flexibly deployable OFDM backscatter communication method and system, belonging to the field of wireless communication. This invention enables nodes to perform backscatter communication without deploying synchronization modules, transmitting their own information to a commercial OFDM receiver with low power consumption, thus avoiding the limitation of node deployment range imposed by the sensitivity of synchronization modules. This invention uses a single-carrier signal from the environment as the excitation signal and transmits node information to the OFDM receiver through low-power cross-system conversion from single-carrier to multi-carrier. For the incident single-carrier excitation signal, the node performs low-power replication and shifting of the signal's spectrum during reflection, converting it into an OFDM reflected signal with multi-carrier characteristics. Since the node does not need to synchronize with the excitation signal before reflection, this invention significantly increases the effective operating radius of the backscattering node and enhances node deployment flexibility. Simultaneously, because the node achieves cross-system conversion from single-carrier to multi-carrier OFDM signals, it also possesses the advantage of commercial compatibility.

The invention discloses an exhaust mechanism and a disinfectant making machine, comprising a cup mouth and a cover body covering the cup mouth, a sealing ring is arranged between the cover body and the cup mouth, the cover body is connected to the cup mouth by a non-sealing thread, and a thread gap is provided between the cover body and the cup mouth; an exhaust groove is provided on the surface of the sealing ring, one end of the exhaust groove is communicated with the inner cavity of the cup mouth, and the other end is communicated with the thread gap; the invention improves the structure of the sealing ring and the cover body, so that the disinfectant making machine can automatically exhaust the air and has good sealing to prevent the solution from flowing out; the invention has a simple structure, low cost, no maintenance, and good exhaust and leak-proof effects; the invention is not only applicable to the disinfectant making machine, but also applicable to other equipment and tools with exhaust, pressure relief and leak-proof requirements.