34results about How to "Avoid filtering" patented technology

The utility model discloses a calcium stearate reaction kettle which comprises a dehydration tank, the upper end face of the dehydration tank is connected with a supporting plate in a sealed mode, the upper end face of the supporting plate is fixedly connected with a reaction kettle body, the upper end face of the reaction kettle body is connected with a cover plate in a sealed mode, and the upper end face of the cover plate is fixedly connected with a first servo motor. The output end of the first servo motor penetrates through the lower end face of the cover plate and is provided with a rotating shaft, the surface of the rotating shaft is fixedly connected with a plurality of stirring heating rods, a through hole is formed in the lower end face of the reaction kettle body, an electromagnetic valve is fixedly connected in the through hole, and the lower end face of the dehydration tank is fixedly connected with a second servo motor. After calcium stearate precipitates, the electromagnetic valve can be controlled to be opened, so that a mixed solution and the calcium stearate precipitates flow onto the dehydration box together, and the calcium stearate can be filtered and left on the dehydration box, so that manual filtration of the solution by a worker is avoided, and the workload of the worker is reduced.

The aluminum alloy door and window production frame paint spraying device comprises a fixing frame, a paint spraying device body and supporting legs, the paint spraying device body is fixedly connected to the top of the right side of the fixing frame, and the supporting legs are fixedly connected to the four corners of the bottom of the fixing frame. By arranging the controller, the controller starts the extraction mechanism, the extraction mechanism extracts harmful gas, then the harmful gas is filtered through the filtering mechanism, a user is prevented from inhaling a large amount of harmful gas, and then the effect of sucking and filtering the harmful gas is achieved; the problems that volatile organic compounds and other harmful gases are released in the paint spraying process, a structure for sucking and filtering the harmful gases is not provided, and a large amount of gases are sucked to damage body health and even cause serious diseases to stimulate a respiratory system, cause dizziness, nausea and other uncomfortable symptoms, and the like are solved. And certain potential safety hazards exist.

The utility model relates to the technical field of water conservancy projects, and discloses a water conservancy project gate which comprises a gate frame, limiting sliding grooves are formed in the two sides of the interior of the gate frame, a gate body is installed in the two limiting sliding grooves in a sliding mode, an installation base is fixedly installed in the middle of one side of the gate body, and a collecting mechanism is installed on the installation base. And the collecting mechanism comprises expansion arms which are rotationally mounted on the two sides of the mounting seat. After the gate continuously ascends, the positioning pieces located at the two ends of one side of the gate can pull the bottoms of the steel wire ropes to continuously ascend, after the bottoms of the two steel wire ropes continuously ascend, the other ends of the two steel wire ropes can be pulled to synchronously and continuously ascend in cooperation with the first pulley and the second pulley, and the two expansion arms continuously rotate towards the outer side; and the filter screen between the two groups of extension arms is continuously unfolded along with the rising of the gate, so that impurities and garbage floating in water flow can be filtered and are prevented from drifting into a downstream lake along with the water flow.

This utility model provides a water collection device for irrigating garden plants, belonging to the field of garden irrigation technology. It includes a water collection channel with a rotatable screen cylinder inside. A partition plate, attached to the outer wall of the screen cylinder, is inclinedly fixed to the top of the inner wall of the water collection channel. A pipe, fixed to the inner wall of the water collection channel, is embedded in the inner cavity of the screen cylinder. A nozzle is installed on the outer wall of the pipe to spray water onto the inner wall of the screen cylinder. After filtering muddy water, a water pump introduces the filtered water into the pipe through a return water pipe. Water is then sprayed onto the screen cylinder by the nozzles on the pipe. The continuously rotating screen cylinder cleans the screen holes sequentially, ensuring the filtration effect of the screen cylinder. The filtered water is further treated by the filter layer. A water purification agent channel extending outwards is fixedly installed at the bottom of the outer wall of the water collection channel. Water purification agent is introduced into the water collection channel through this channel, and a linkage stirring component mixes and stirs the water purification agent, improving the water treatment effect.

The application relates to a typical traffic event detection system based on deep learning and belongs to the field of vehicle-road cooperation and intelligent traffic. The system is sequentially provided with a target detection model module, a time flow motion feature model module and a traffic event detection module; the target detection model module is provided with a multi-branch hollow fusion module for increasing coordinate attention and an overlapping detection frame reservation mechanism module in parallel; the time flow motion feature model module is a Gaussian linear difference time flow model module; and the traffic event detection model module is a multi-dimensional visual feature event detection model module. The application fully utilizes roadside monitoring to obtain real-time traffic video images, optimizes a model to improve the precision of typical traffic events, can effectively improve event detection accuracy, balances detection performance and real-time performance, timely solves road traffic events, improves traffic efficiency and reduces intersection congestion.

The utility model provides a wood lacquer vibration filter sieve, and relates to the field of paint production. The wood lacquer vibration filter sieve comprises an outer barrel, a feeding end is fixed to the upper end of the outer barrel, two supports are fixedly installed at the outer end of the outer barrel, a rotating shaft is inserted between the two supports in a penetrating mode, the rotating shaft is rotationally connected with the two supports, a motor A is fixedly installed on one support, an output shaft of the motor A is connected with the rotating shaft, and a cam is fixedly installed on the rotating shaft. A telescopic rod is fixedly installed at the bottom of the outer barrel, a motor B is fixedly installed at the bottom of the outer barrel and located below the telescopic rod, and an output shaft of the motor B is connected with the telescopic rod. A disc is fixed in the upper end of the feeding end, a plurality of notches penetrating up and down are formed in the disc, and a mandrel is arranged in the outer barrel. According to the wood lacquer vibration filter sieve, by arranging the motor A, the motor B, the mandrel and the conical filter screen, wood lacquer can be evenly distributed on the conical filter screen, the area of the filter screen is fully utilized, and the high-efficiency and non-blocking filtering effect is achieved.

The utility model discloses high-cleanliness air drying equipment for bacon processing, and relates to the technical field of bacon processing.The high-cleanliness air drying equipment for bacon processing comprises a first collecting box, a drying box is arranged at the top of the first collecting box, a connecting pipe is fixedly installed on one side of the drying box, and the connecting pipe is communicated with the interior of the drying box; the other end of the connecting pipe is fixedly provided with a shell, the shell is communicated with the interior of the connecting pipe, the other end of the shell is fixedly provided with an air inlet pipe, the air inlet pipe is communicated with the shell, one side of the shell is fixedly provided with a driving motor, and the output end of the driving motor is fixedly provided with blades. According to the bacon drying box, air entering the drying box can be conveniently filtered, so that external dust is prevented from entering the drying box, the dust is prevented from adhering to bacon to the maximum extent, the pollution of the dust to the bacon is avoided, the dust on the bacon is reduced, and the influence of the dust on the taste of the bacon is reduced.

The utility model discloses a grading type impact grinding device for micro powder, which relates to the technical field of grading type impact grinding devices for micro powder and comprises a shell, a first motor is fixedly mounted on the outer side of the shell, and a second motor is mounted on the outer side of the shell. Through arrangement of a first synchronous wheel, a first synchronous belt, a first gear, a second gear, a second synchronous wheel, a first transmission gear, a second transmission gear, a first motor, a first crushing shaft, a second crushing shaft, a driven crushing shaft, a main crushing shaft and a first filter screen, the graded impact grinding device for micro powder has double crushing effects, and the crushing effect is improved; according to the grading type impact grinding device for the micro powder, the low preparation speed is avoided, through the arrangement of a grinding column, a grinding ring, a second motor, a first transmission wheel, a transmission synchronous belt, a second transmission wheel, a fixed column, a second filter screen, a transmission shaft, a movable column, a spring bearing and a lower pressing strip, the grading type impact grinding device for the micro powder can filter the powder, and the situation that the powder is not filtered is avoided.

The invention belongs to the technical field of traditional Chinese medicine extraction, and particularly relates to a traditional Chinese medicine extraction and filtration method which comprises the following steps: adding traditional Chinese medicine raw materials and water into an extraction tank through a feeding port, connecting a vacuumizing device through a gas pipeline interface, vacuumizing the interior of the extraction tank, and then connecting a protective atmosphere pipeline through the gas pipeline interface, introducing a protective atmosphere into the extraction tank, opening a steam adjusting valve, introducing high-pressure steam into the extraction tank, starting extraction of traditional Chinese medicine components, filtering traditional Chinese medicine residues in an extracting solution through a stainless steel filter element filter after extraction of the traditional Chinese medicine components is completed, and storing the extracting solution through a third liquid storage tank. Steam can be introduced into the extraction tank, namely, the extraction temperature in the extraction tank is adjusted according to the temperatures required by different traditional Chinese medicines, so that thermosensitive and soluble medicinal components can be extracted at a low temperature, insoluble medicinal components can be extracted under the protection of nitrogen and in a subcritical state of water, and the extraction rate of the medicinal components in the traditional Chinese medicines or formulas is increased.

This disclosure relates to a travel itinerary recommendation method, apparatus, and electronic device, comprising: generating a set of candidate travel itineraries that bind transportation and accommodation based on a travel plan; conducting a first round of screening by calculating compliance scores for the travel itineraries using a compliance agent and experience scores using an experience agent; employing a sliding time window strategy for dynamic constraint relaxation and determining the weights of compliance and experience scores through multiple rounds of game theory; and performing weighted summation to obtain a comprehensive score for the travel itinerary; conducting a second round of screening by using a spatiotemporal correlation model to predict the probability of successful or unsuccessful connection between transportation and accommodation in the travel itinerary based on the joint probability distribution of traffic delays and commuting congestion between transportation and accommodation; and displaying the travel itinerary to the target user. This disclosure treats transportation and accommodation as a whole, effectively avoiding the omission of potentially high-quality travel itineraries and spatiotemporal mismatches, and achieving deep coupling recommendation of transportation and accommodation.

The utility model relates to an infusion device and a perfusion system.The infusion device comprises an infusion tube, a conveying pump arranged on the infusion tube and a filtering assembly, the filtering assembly communicates with a pump outlet of the conveying pump, the filtering assembly comprises two or more liquid medicine filters connected in series, and the liquid medicine filters are arranged in the liquid medicine filters; the diameter of the filter hole farthest from the delivery pump is within a first preset value, and the diameters of the filter holes of the rest liquid medicine filters are all larger than the first preset value. According to the embodiment of the invention, the risk that the liquid medicine filter is blocked can be reduced, so that the long service life of the perfusion system is ensured.

The invention relates to a data processing method and device, electronic equipment and a storage medium, and the data processing method comprises the steps: obtaining first putting accumulated data corresponding to first user equipment, and the first putting accumulated data is determined according to resources accumulated by first type information put to the first user equipment; determining whether the first release accumulated data reaches a first preset threshold value or not; if the first release accumulated data reaches a first preset threshold value, performing channel attribution on the first user equipment; and if the channel attribution is successful, generating return data for channel return based on the user related information of the first user corresponding to the first user equipment and the release related information of the first type of information. According to the embodiment of the invention, the type and quantity of the returned data can be enriched, user groups which are sensitive to prices but willing to watch advertisements are prevented from being filtered out, the diversity of the returned data is improved, and the finally determined user related information of the first user and the release related information can be more accurate.

The utility model discloses filtering equipment for manufacturing cement, and relates to the technical field of cement manufacturing, the filtering equipment comprises an operation plate, a placing groove is formed in the right side of the top surface of the operation plate, the lower side of the inner wall of the placing groove is fixedly connected with a first motor, and the output end of the first motor is fixedly connected with a first belt pulley; a vertical rod is fixedly connected to the position, located on the rear side of the inner wall of the containing groove, of the right portion of the top face of the operation plate, a rotating rod is rotationally connected to the front portion of the upper portion of the rod wall of the vertical rod, a second belt wheel is fixedly connected to the front portion of the rod wall of the rotating rod, and a belt is jointly slidably connected to the surfaces of the second belt wheel and the first belt wheel. According to the utility model, the situation that some impurities in a product are filtered by a worker through a tool, so that the working efficiency of the worker in the using process of equipment is reduced is avoided, meanwhile, the working efficiency of the equipment is also improved, and some grit is prevented from splashing into eyes of the worker, so that the safety effect in the using process of the equipment is improved.

The utility model discloses a vibration device for mixed feeding of Chinese wolfberry fruit, raspberry and herba epimedii health tea, which belongs to the technical field of health tea production and comprises a mixing tank, a support frame is connected onto the mixing tank, a discharge pipe is connected below the mixing tank, a connecting frame is connected above the mixing tank, a connecting plate is connected on one side of the mixing tank, and the connecting plate is connected on the other side of the mixing tank. Side plates are connected to the two sides of the upper portion of the connecting plate. According to the vibration device for mixed feeding of Chinese wolfberry fruit, raspberry and herba epimedii health-care tea, a filling hopper is filled with medicinal raw materials, the medicinal raw materials fall onto a filter plate from the filling hopper, during working, a vibration motor vibrates the filter plate to promote the filter plate to slide up and down along a connecting rod, and the sliding filter plate compresses a spring, so that the medicinal raw materials fall into the filter plate; by arranging the filter plate, the filter plate can filter medicinal raw materials, impurities are prevented from being mixed into follow-up packaged finished products, the product quality is improved, impurity stone grains can fall into a waste box, and workers can conveniently collect and treat the impurity stone grains.

The embodiment of the invention relates to the technical field of communication, and discloses a voltage ripple filtering method and electronic equipment, and the method comprises the steps: sampling a voltage ripple to obtain N original voltage values, and selecting an original voltage value a [i] from the N original voltage values in sequence; judging whether the original voltage value a [i] is an interference value or not; if the original voltage value a [i] is the interference value, modifying the original voltage value a [i] according to a first modification strategy, and judging whether the original voltage value a [i + 1] is the interference value or not according to the modified original voltage value a [i]; and if the original voltage value a [i + 1] is also the interference value, modifying the original voltage value a [i] and the original voltage value a [i + 1] according to a second modification strategy so as to filter the voltage ripple. The peak value or the valley value is prevented from being filtered out, the accuracy of ripple value calculation is improved, misjudgment is avoided, and the test accuracy is improved.

The utility model discloses a grinding device for artificial mineral spring salt production. The grinding device comprises supporting legs. Mineral spring salt is conveyed into the first flow dividing barrel through the feeding pipe, flow guide grooves of the second flow dividing barrel and the first flow dividing barrel are evenly distributed, the first motor is started, the first motor drives the grinding sleeve to tilt in the grinding barrel through the driving rod, the ball head clamping groove plate, the ball head and the V-shaped plate and the cross-shaped rod, the second motor is started, and the grinding sleeve tilts in the grinding barrel. A motor II drives a rotating convex plate, a sliding block and a sliding rod to move up and down, so that a motor I is driven to move up and down, and the motor I drives a grinding sleeve to grind mineral spring salt up and down through a fixing frame, so that the mineral spring salt grinding device has the advantage of efficient grinding; according to the mineral spring salt grinding device, mineral spring salt can be ground more sufficiently, the ground mineral spring salt reaches the qualified standard, manual later-stage filtering is avoided, the grinding efficiency of the mineral spring salt is improved, and the grinding time of the mineral spring salt is shortened.

The utility model discloses a water delivery structure applied in a swash plate type plunger water pump, which comprises a stator assembly and a rotor assembly arranged in the stator assembly, and a plurality of plunger structures are arranged on the rotor assembly. The stator assembly is internally provided with a swash plate jacking structure used for controlling the multiple plunger structures to reciprocate in turn in the turnover state, a water inlet is formed in one side of the stator assembly, the resistance generated when water flow enters the water pump is reduced, and therefore the water conveying efficiency of the water pump is improved. The rotary filter screen structure in the water outlet can filter out water flowing out, the impurities in the water are prevented from entering a follow-up water conveying pipeline, other equipment is protected, and the maintenance cost caused by the fact that the impurities block the pipeline or damage the equipment is reduced.

The utility model relates to the technical field of access control devices, and discloses a building elevator intelligent access control device which comprises a main body machine, a display screen is arranged on the front side of the main body machine, a mounting groove is formed in the rear side of the main body machine in a penetrating mode, a mounting frame is fixedly connected in the mounting groove, and a cooling fan is arranged in the mounting frame. A dust cover is arranged on the outer side of the mounting frame and arranged on the rear side of the main body machine, connecting blocks are fixedly connected to the two sides of the dust cover, limiting holes are formed in the upper ends and the lower ends of the connecting blocks, stabilizing blocks are fixedly connected to the upper ends and the lower ends of the dust cover, and dismounting assemblies are arranged on the two sides of the rear end of the main body machine. And uniformly distributed heat dissipation holes are formed in the right side of the main body machine. According to the dustproof cover, the cooling fan, the cooling holes, the connecting blocks, the limiting holes, the extrusion grooves, the extrusion block clamping arms and the handles work in a matched mode, the two clamping arms can be controlled to move through the dismounting assembly, and the dustproof cover can be mounted and dismounted.

The utility model discloses a vehicle-mounted sound card box and a vehicle test system. The vehicle-mounted sound card box comprises a housing; the MIC is arranged in the shell, at least part of the MIC is exposed out of the shell, and the MIC is used for collecting sound; the loudspeaker is arranged in the shell, at least part of the loudspeaker is exposed out of the shell, and the loudspeaker is used for playing sound; the PCBA board is arranged in the shell, the PCBA board is in interactive connection with the MIC, the output end of the PCBA board is connected to the controlled end of the loudspeaker, and the PCBA board is suitable for being connected with a computer or a cabin controller through a PCBA board connecting line; and the sound insulation assembly is arranged between the MIC and the loudspeaker. In the process of sound acquisition, transmission and broadcasting, the sound insulation assembly is arranged between the MIC and the loudspeaker, so that electromagnetic interference between the MIC and the loudspeaker can be avoided, noise is reduced, current sound is avoided, sound quality is clearer, and howling can be avoided.

The invention relates to the technical field of gas turbine generators, in particular to a gas turbine generator set vibration data anomaly detection method based on contrast analysis. The method comprises the following steps: continuously acquiring continuous vibration data of the gas turbine generator set; identifying noise points by adopting an improved mean absolute deviation method; adopting background contrast detection to identify continuous noise; noise and abnormal values are separated according to a threshold selection method based on a quantile map; and according to the data after the noise points and the continuous noise are removed, calculating the anomaly degree of the original data to complete anomaly detection. Noise and abnormal values are effectively distinguished while actual abnormal data are reserved, the situation that the abnormal values are mistakenly considered as noise and filtered out is avoided, it is ensured that a control system can respond to real abnormal conditions in time, and the reliability and accuracy of the system are improved.

The utility model relates to the technical field of filters and discloses a fuel filter which comprises an outer shell, a filter element with a sealed bottom end is arranged in the outer shell, a cover body is arranged at the top end of the outer shell, the fuel filter further comprises a dispersing part and an annular filter strip, the dispersing part is arranged at the upper end of the interior of the filter element, and the annular filter strip is arranged in the outer shell. The dispersing part is used for dispersing fuel oil introduced into the filter element to each surface of the inner wall of the filter element, and the upper end surface of the annular filter strip is connected with a telescopic connecting part; after to-be-filtered fuel oil is introduced, part of the to-be-filtered fuel oil directly falls into the filter element, and the other part of the to-be-filtered fuel oil is guided to the leakage holes through the guide strips and then flows down from all the surfaces of the inner wall of the filter element, so that the fuel oil is prevented from being concentrated in a certain area to be filtered, and the fuel oil is uniformly distributed through the dispersing part; the impurities are relatively uniformly accumulated on each surface of the inner wall of the filter element, so that the situation that a local area loses efficacy in advance due to excessive bearing of the impurities is avoided, and the overall service life of the filter element is prolonged.

The invention belongs to the technical field of tubular microporous filtration, and discloses a tubular microporous filter for vanadium-nitrogen alloy production, which comprises a filter shell, a push rod motor is mounted in the filter shell, an electric push rod is mounted on the push rod motor, and a sliding piston disc is fixedly connected to the electric push rod. According to the invention, through the cooperation of structures such as a push rod motor and a circular ring scraper blade, the push rod motor drives an electric push rod and the sliding piston disc to slide up and down, so that the filter can be used for filtering the filter; and meanwhile, the annular scraping plate and the connecting sliding rod are driven to slide up and down, so that the annular scraping plate scrapes solid impurities attached to the inner wall of the filtering pipeline.

The utility model provides a multi-stage waste gas filter. The multi-stage waste gas filter comprises a shell and a plurality of filter boxes, an air inlet and an air outlet are respectively formed in the left and right side walls of the An air inlet cavity, a filtering cavity and an air outlet cavity are formed in the shell; a first vertical partition plate is arranged between the air inlet cavity and the filter cavity, and a second vertical partition plate is arranged between the filter cavity and the air outlet cavity; a first communicating port is formed in the first vertical partition plate, and a second communicating port is formed in the second vertical partition plate; the filter boxes are inserted between the two vertical partition plates in a layered manner, and the two communicating ports are staggered in the height direction; the filter boxes are located in a height space between the two communicating ports, and the diameters of filter holes of the filter boxes are gradually reduced in the waste gas flowing direction; a horizontal sealing plate positioned above each filter box is arranged between the two vertical partition plates; a first air passing hole is formed in the horizontal sealing plate; the filter box is in compression joint with or separated from the horizontal sealing plate under the action of the sealing adjusting assembly, so that the periphery of the first gas passing hole is sealed or unsealed, and an exhaust path of unfiltered waste gas is blocked.

The utility model discloses a wheat planting underground infiltrating irrigation water-saving irrigation device which comprises a water tank and a water collecting component used for preventing rainwater waste. The water collecting part comprises an inserting groove formed in one side in the water tank, an inserting block arranged in the inserting groove, a filtering plate fixedly connected with one side of the inserting block, a water pumping pipe fixedly connected with one side of the water tank, a water pump fixedly connected with one side of the water pumping pipe, and a flow dividing pipe fixedly connected with one side of the water pump; according to the irrigation device, the water tank and the water collecting component are arranged, so that the problem that when an existing irrigation device is used, although water resources in the water tank can be pumped out, crops can be subjected to infiltrating irrigation, and the irrigation efficiency is low is solved. However, water resources in a water tank need to be manually added, natural water resources such as rainwater are inconvenient to collect and utilize, water resource waste is easily caused, and impurities and the like easily block a pipeline, so that the practicability is reduced.

The utility model provides a water prevention and control device for geological survey, which relates to the technical field of geological survey and comprises two supporting boxes, mounting seats are arranged above the two supporting boxes, supporting rods are arranged between the two supporting boxes and the mounting seats, a protective plate is arranged between the two mounting seats, and the protective plate is arranged between the two supporting boxes and the mounting seats. Sliding grooves are formed in the sides, close to each other, of the two mounting seats, mounting assemblies are slidably connected to the sliding grooves, and the measuring equipment is mounted away from the ground through the mounting assemblies, so that erosion of ground accumulated liquid to the measuring equipment can be effectively prevented, the measuring equipment is prevented from being damaged, and the service life is prolonged; in use, after the mounting assembly is connected to the sliding grooves in a sliding mode, the rotating bases on the two sides are rotated, so that the rotating bases expand towards the two sides, and auxiliary supporting is conducted on the mounting base.

The utility model relates to the technical field of injection molds, in particular to an anti-blocking injection mold which comprises a lower mold and an upper mold, a feeding pipe is arranged on the upper mold, a first groove is formed in one side of the feeding pipe, a second groove is formed in one side, close to the upper mold, of the first groove, a rotating assembly is arranged in the second groove, and the rotating assembly is connected with the lower mold through a connecting rod. A rotary knob is arranged on the rotating assembly, a first annular filter plate is fixedly arranged in the first groove, a baffle is fixedly arranged on one side of the first annular filter plate, and a second annular filter plate is arranged on the first annular filter plate in a sleeving manner, so that the device can adapt to the flowability of different plastics, blockage is prevented, and the continuous production time is prolonged.

The utility model provides a radix puerariae powder pulping device with a filtering structure, which relates to the technical field of pulping devices and comprises a base and a connecting pipe, a tank body is fixedly mounted on the surface of the base, a motor is fixedly mounted on the top surface of the tank body, a water tank is fixedly mounted on the surface of the base, and a water pump is fixedly mounted on the surface of the water tank. An annular pipe is fixedly installed in the tank body, a spray head is fixedly installed on the surface of the annular pipe, a rotating shaft is installed at the output end of the motor, and a blade is fixedly installed on the surface of the rotating shaft. By arranging a filter plate, a baffle, a collecting box, a slot, a sliding rod, a spring and a clamping block, the effect of filtering radix puerariae pulp after radix puerariae pulping is completed is achieved, meanwhile, the filter plate is convenient to disassemble, assemble and clean, the situation that after radix puerariae pulping is completed, radix puerariae needs to be filtered again with the help of a filtering tool is avoided, the radix puerariae pulping efficiency is improved, and the practicability is high. The structure is simple and the practicability is high.

The utility model belongs to the technical field of water meters, and particularly relates to an internal backflow prevention type water meter which comprises a water meter body, a water inlet pipe is fixedly connected to one side of the water meter body, a water outlet pipe is fixedly connected to the other side of the water meter body, connecting pipes are spirally connected to the interiors of the water inlet pipe and the water outlet pipe, and hexagonal rings are arranged on the outer walls of the connecting pipes. A mounting ring is fixed in the connecting pipe, a duckbilled valve body is fixed to one side of the mounting ring, guide pipes are fixed to the inner wall of the connecting pipe and located on the two sides of the duckbilled valve body, inserting rods are inserted into the guide pipes, sliding grooves are formed in the inner walls of the guide pipes, and sliding blocks in sliding connection with the sliding grooves are fixed to the outer walls of the inserting rods; a pressing plate is fixed at one end of the conduit outside the conduit; according to the utility model, the water inlet pipe and the water outlet pipe can be sealed when water is cut off and flows back, so that water can be effectively prevented from flowing back, the defect of metering deviation of the water meter is overcome, the measurement is more accurate, and the waste of water sources is avoided.

The application discloses a GNSS anti-spoofing method and system for multi-constellation ionospheric delay adaptive detection, and belongs to the technical field of satellite navigation. The method comprises the following steps: extracting effective dual-frequency pseudorange data in different constellations from observation data according to signal types; calculating ionospheric delay values of each satellite in each constellation based on preset frequency ratio factors of each constellation; assigning a sliding window buffer to each satellite, dynamically generating a detection threshold interval; judging the signal abnormal state of the current satellite, and counting the number of continuous abnormalities to obtain a single-satellite abnormality preliminary determination result; based on the single-satellite abnormality preliminary determination result, counting the proportion of abnormal satellites in each constellation and the number of continuous abnormalities of each satellite, performing global abnormality judgment, and generating an alarm information when the judgment is triggered. The application improves the robustness, environmental adaptability and reliability of GNSS anti-spoofing detection through multi-constellation joint detection, sliding window adaptive threshold and abnormal value filtering mechanism, and does not need to increase the hardware cost.

This application discloses a simulation device, decoupling method, equipment, and system for new energy power plants, relating to the field of power grid decoupling technology. Each DC-side circuit model is assigned to its corresponding first acceleration unit for computation. All sub-filter circuit models of the filter circuit model are assigned to a second acceleration unit for computation. This overcomes the limitations of computing power in a single acceleration unit and the number of subsequent I / O hardware interfaces. The first decoupling unit decouples the DC-side and AC-side filter circuit models of each converter, avoiding numerical oscillations. Assigning the filter circuit models to the second acceleration unit avoids filtering out high-frequency information, ensuring the decoupling of high-frequency information. The input of the second decoupling unit is connected to the output of each sub-filter circuit model, and the output of the second decoupling unit is connected to each busbar in the model of the power plant's line equipment. The second decoupling unit decouples the converter group units and the power plant's line equipment, achieving simulation decoupling and improving simulation accuracy.