396 results about "Continuous use" patented technology

The invention discloses a bridge sensor self-optimization arrangement and state evaluation method based on a modal confidence criterion, and relates to the technical field of big data analysis and processing. The method comprises the following steps: step 1, acquiring a vertical acceleration time sequence at candidate installation coordinates of each sensor through preset vehicle excitation; 2, a physical information neural network is adopted to drive sparse damage reconstruction and sensor importance joint optimization algorithm to determine a bridge sensor self-optimization arrangement result; and step 3, installing a vertical acceleration sensor on the target bridge according to a bridge sensor self-optimization arrangement result, dividing bridge state grades according to a finite element unit damage estimation result, and outputting a bridge state evaluation result. The method can be continuously used in the bridge operation period, quantitative and traceable structure state evaluation results are provided, potential risks can be found in advance, and the reliability, practicability and intelligent level of bridge health monitoring are remarkably improved.

The invention discloses an underground data reliable transmission method and system based on multipath redundancy, and relates to the technical field of drilling operation well control monitoring, and the method comprises the steps: building a channel state real-time monitoring and reliability evaluation mechanism for a plurality of communication channels from underground to ground, and taking an evaluation result as a drive, performing erasure redundancy coding and adaptive fragment distribution on a to-be-transmitted data packet to enable a channel with higher reliability to bear more coding fragments; parallel uplink transmission of the fragments is achieved through multi-channel scheduling, and the ground end carries out decoding reconstruction based on the arriving fragments to recover complete monitoring data. Therefore, when the channel is degraded or partially loses efficacy, the data can still be continuously available, so that the certainty and the real-time performance of underground monitoring data transmission are improved.

The invention discloses a high-voltage discharge circuit suitable for a storage battery power supply and an electric flame stove. The high-voltage discharge circuit comprises an inversion driving module, a boosting transformer T1, at least three groups of active bridge rectifier modules and discharge modules corresponding to the active bridge rectifier modules. Through combination of driving of the active bridge rectifier module, voltage / current double-closed-loop feedback and real-time PWM signal output control of the control chip U1, current difference of each discharge branch is eliminated, the problem of uneven branch current is solved, and ring current and reactive power loss between branches are eliminated; a diode in a voltage doubling rectifying circuit and a bleeder resistor of a resonance circuit in the prior art are abandoned, an active bridge type rectifying module is adopted for driving, a PWM signal is dynamically adjusted through the low ESR characteristic of a capacitor C1 and closed-loop control, extra power loss is avoided, the working temperature of the circuit is controlled to be below 85 DEG C, and the service life of the circuit is prolonged. And the continuous service life of components in the circuit is prolonged.

The invention relates to the technical field of intelligent wearable equipment, and discloses an intelligent wearable system integrating multi-modal physiological monitoring and active intervention, which comprises a ring end acquisition module, a mobile end cache module and a cloud intelligent analysis module, and the cloud intelligent analysis module comprises a multi-modal fusion analysis unit, an active intervention decision unit and a user digital twinborn model construction unit, and is used for calculating a sleep score, a readiness score, a pressure index, a blood oxygen trend and a menstrual period prediction result according to the multi-source physiological characteristics, and executing an active intervention decision based on a health state. The sensing module is integrated in the ring body, the light-weight design is suitable for long-term wearing, all-weather data acquisition is guaranteed, compared with a bracelet or a watch, the ring is comfortable and hidden to wear, the continuous use willingness of a user is enhanced, meanwhile, the ring is suitable for high-voltage office or sports scenes, and non-inductive health monitoring is achieved.

The invention belongs to the technical field of water-based ink, and provides high-temperature-resistant water-based ink for laminated iron and a preparation method thereof.According to the high-temperature-resistant water-based ink for laminated iron and the preparation method of the high-temperature-resistant water-based ink for laminated iron, the design of a double-resin system formed by compounding waterborne polyurethane resin and flexible segment copolymer modified ternary vinyl chloride-vinyl acetate resin is adopted, and the synergistic effect of surface modified nanometer aluminum oxide reinforcing filler and an elastomer modifier is combined; the interface compatibility is improved through a siloxane coupling agent surface treatment technology, a composite coating structure with balanced flexibility and heat resistance is formed, the high temperature resistance can reach 200 DEG C or above, continuous use is free of failure, the flexibility is free of cracking through a T-bend test, the adhesion of a coating film reaches the 0-level standard, the drying time is shortened to be within 30 minutes, and the service life of the coating film is prolonged. The comprehensive performance index that the storage stable period is prolonged to 12 months or above is achieved, the technical problems that an existing laminated iron coating is insufficient in flexibility and poor in thermal stability in a high-temperature environment are solved, and the high-temperature-resistant laminated iron coating has wide food packaging and industrial protection application value.

The invention provides a formula of sleep-aiding essential oil containing cedar himalaya, relates to the technical field of sleep-aiding essential oil, and aims to solve the problems of single effect, poor stability and insufficient skin tolerance of existing sleep-aiding essential oil. The formula comprises the following components in parts by weight: 0.5-5 parts of Himalaya cedar essential oil, 80-95 parts of base oil, 1-10 parts of synergistic sleep-aiding essential oil, at least one of lavender essential oil, chamomile essential oil and sandalwood essential oil, and 0.1-1 part of optional antioxidant. During preparation, the components are ensured to be uniform through a process of stirring at a constant temperature of 25-35 DEG C and mixing at a rotating speed of 200-300rpm, the pH value of the product is 5.5-7.0, the retention rate of the active components is greater than or equal to 90% after the product is stored in a dark place at 25 DEG C for 6 months, and the use mode is that the product is smeared on wrists / necks / soles 1-2 hours before sleep, and 0.5-2mL of the product is smeared on each time. Tests show that the sleep time of insomnia people can be shortened to 15-22 min after the essential oil is continuously used for 28 days, the PSQI score is reduced by 40%-54%, the skin irritation is zero, the essential oil is suitable for preparing external sleep-aiding essential oil cream, ball bottles and other products, and a safe and efficient solution is provided for sleep disorder people.

The invention provides a game control method, and the method comprises the steps: providing a graphical user interface through a terminal device, and the graphical user interface comprises a game scene and at least partially comprises a first virtual object corresponding to the terminal device; the method comprises the following steps: in response to a first virtual object meeting a specified condition, controlling to activate a target skill; in response to a trigger operation for the target skill, controlling the first virtual object to enter a first state; responding to the first virtual object to quit the first state, and controlling to stop activating the target skill; in response to the fact that the current game state is detected to be in the specific time period state, the target skill is controlled to be activated, so that a skill activation mechanism in the game is organically combined with the special time period state, players can continuously use the skill in the specific time period without repeatedly meeting specified conditions, and the interaction experience is improved.

The invention discloses a high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable and a preparation method thereof, and belongs to the technical field of cable manufacturing, and the high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable sequentially comprises an optical fiber unit, a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and a sheath layer from inside to outside. The optical fiber unit adopts a ceramic silicone rubber buffer layer; the conductor layer is a nickel-plated copper alloy stranded wire, and the oxidation resistance is enhanced through nano titanium dioxide sol treatment; the insulating layer is of a three-layer co-extrusion structure; the shielding layer adopts an aluminum-plastic composite belt and tinned copper wire braided composite structure; the anti-corrosion layer is a polytetrafluoroethylene film subjected to plasma treatment; the sheath layer is made of two-component ceramic silicone rubber, is flexible after being vulcanized at normal temperature, and is converted into a ceramic body at high temperature. According to the optical fiber composite cable, through the collaborative design of a multi-layer structure, the performance of excellent continuous use stability, high salt mist environment corrosion resistance and the like is achieved, the optical fiber composite cable is suitable for high-temperature, corrosion, fire and other severe environments, and the safety and durability of the composite cable are remarkably improved.

The invention discloses a distribution cable branch box state monitoring system and method, and relates to the technical field of branch box state monitoring, and the system comprises a branch box monitoring point screening module, a branch box monitoring module, a branch box state analysis module, an early warning terminal and a database. A target main body set under corresponding monitoring of the distribution cable branch box is obtained through preliminary analysis, further deep monitoring is executed for the target main body set corresponding to the branch box, a state result of corresponding monitoring of the distribution cable branch box is obtained through analysis, and the result serves as a reference standard. The method comprises the following steps: analyzing linkage control measures in a corresponding state of the distribution cable branch box, acquiring trend expression of the distribution cable branch box in a corresponding monitoring state abnormity, and predicting feasibility of the distribution cable branch box in corresponding continuous application, thereby realizing omnibearing intelligent detection of the distribution cable branch box. And the real-time state corresponding to the distribution cable branch box can be comprehensively known.

The invention discloses a preparation for promoting efficient yield increase and tree cultivation of rubber trees. The invention belongs to the technical field of rubber tree planting, and the preparation comprises CMC-Na, Yitenling, a Nobawen chelating nutrient solution, boron hydroxide, sodium benzoate, melissyl alcohol, 14-sterol and other components, the concentration of each component is optimally designed, and the components are uniformly prepared through special stirring equipment; when in use, the preparation is smeared on a secant of a rubber tree, the latex yield can be remarkably increased, the dead skin rate is reduced, and the dry glue content is increased by continuous use; the problems that the yield increasing effect of rubber trees is limited and maintenance is insufficient are solved through scientific matching and synergistic effect, the method has the advantages of being wide in raw material source, controllable in cost and easy and convenient to operate, is suitable for large-scale popularization, and provides powerful support for sustainable development of the natural rubber industry.

The utility model discloses a molding powder extrusion sheet cooling device which comprises a conveying device, a water tank is fixedly installed on the bottom wall of the conveying device, two semiconductor coolers are fixedly installed on the outer wall of the water tank, a circulating pump is fixedly installed on the outer wall of the water tank through a first supporting mechanism, and an inlet pipe of the circulating pump penetrates into the water tank. A drainage pipe communicated with the interior is fixedly mounted on the outer wall of the water tank. The semiconductor cooler, the connecting sleeve, the hollow roller and other assemblies are arranged, the hollow roller can rotate through cooperation of the rotating pipe and the connecting sleeve, and therefore the utilization rate of cooling water can be increased, and the cooling water can be continuously output along with continuous output of the circulating pump; the cooling water after heat absorption can flow into the circulating pipe through cooperation of the connecting sleeve on the other side and the connecting pipe, and the cooling water after heat absorption can flow into the water tank again in the circulating pipe and is refrigerated again, so that circulation and continuous use of the cooling water can be realized, and the cooling effect on the extrusion sheet can be ensured.

The utility model relates to a fabric washing resistance testing device, which comprises a base, a water storage cavity, a water inlet pipe, a water outlet pipe, a water outlet pipe and a water outlet pipe and is characterized in that the left side of the top of the base is provided with a circular groove; the impeller washer is mounted in the circular groove and used for washing the fabric; the water changing assembly is arranged at the bottom of the base and used for changing water for the impeller washer. The utility model relates to the technical field of fabric performance detection. According to the testing device for the washing resistance of the fabric, through the arranged filtering assembly, when sewage makes contact with a filtering plate, most pigment particles in the sewage can be adsorbed through the filtering plate, so that water becomes clear again, and the situation that the subsequent fabric washing detection effect is affected due to continuous use of washing water is avoided; along with the gradual increase of the water level in the water storage cavity, the floater moves upwards again, and the next turn of fabric washing can be started until the buzzer alarm gives an alarm again, so that water resources can be effectively saved.

The utility model discloses an iron nail polishing machine relates to iron nail polishing technical field, the utility model discloses a position switching drive assembly drives double board mounting assembly rotation, makes sealing plate and sieving plate side surface of sticking cylinder slide, make sealing plate or sieving plate cover import and export or make import and export completely expose, when import and export are located downside and are covered by sieving plate, the powder of auxiliary material and iron nail scrap produced in polishing process can pass through sieving plate and fall in the powder box, realize the quick filtration to auxiliary material, save time and effort, when import and export are located upside and completely expose, through the cooperation of front and back movement subassembly, electric telescopic pole and electromagnet, the iron nail after polishing in cylinder interior is adsorbed on the surface of electromagnet and shifts to the iron nail box, can separate the iron nail after polishing with the polishing auxiliary material quickly, make the polishing auxiliary material after filtration be retained in cylinder for subsequent polishing use, realize the quick filtration and continuous use to polishing auxiliary material.

The invention relates to a high-temperature viscous dust filtering and purifying system and method. The high-temperature viscous dust filtering and purifying system comprises a dust remover, a filter, a pre-spraying paint conveying system, a low-oxygen regeneration system, a gas supply system and a nitrogen system, the problems that in the prior art, the pre-spraying effect is gradually attenuated due to the fact that pre-spraying is only conducted for the first time, and a filter element is blocked after being used for a long time and fails are mainly solved. The continuous use time of the filter element is prolonged; the regeneration period of the filter element is prolonged; the workload of operators is reduced; and the regeneration energy consumption is reduced.

The invention discloses a pulverized coal impurity separator with double spiral screens, and belongs to the technical field of screening equipment.The pulverized coal impurity separator with the double spiral screens comprises a first-stage material collecting barrel and a second-stage material collecting barrel, a connecting pipe is fixedly connected between the bottom position of the bottom end of the first-stage material collecting barrel and the top position of the bottom end of the second-stage material collecting barrel; a first-stage screen is fixedly connected to the interior of the first-stage material collecting barrel, the interior of the first-stage material collecting barrel is divided into a first-stage screening cavity and a first-stage material collecting cavity through the first-stage screen, first-stage spiral blades can be adopted to be matched with a driving motor and a first-stage spiral transmission shaft, materials can be reversely lifted and scattered, first-stage screening is completed, and the efficiency is improved. And meanwhile, a secondary spiral blade is matched with a driving motor and a secondary spiral transmission shaft to lift residual materials and impurities, the materials are screened again, the whole equipment is simple in structure and convenient and fast to operate, and the effects of continuous use, rapid cleaning and effective removal of fibers and other impurities in powdery substances such as pulverized coal are achieved.

The invention belongs to the technical field of aluminum alloy manufacturing, and provides a high-performance aluminum alloy for an aluminum frame of an electrolytic cell, which comprises the following components: 5-8% of Si, 0.5-3.0% of Be, 0.5-2.5% of Mn, 0.5-3.0% of Li, 0.01-0.07% of a refiner, less than or equal to 0.15% of impurities and the balance of A1, alloy elements Be, Li and Mn are added into a high-fluidity Al-Si alloy, a refiner is added to refine grains to improve the modulus and strength of the alloy, meanwhile, the modes of smelting, solution annealing, aging treatment and the like are adopted for coordinated regulation and control, and finally the aluminum frame alloy for the electrolytic bath with high heat resistance, high modulus and high corrosion resistance is obtained. The continuous service life of the electrolytic bath can be prolonged; the production efficiency is improved.

The invention provides a method and system for continuously using a whole vehicle function in the OTA upgrading process, and belongs to the technical field of OTA. The method for continuously using the whole vehicle function in the OTA upgrading process comprises the steps that whole vehicle function supporting and forbidding conditions involved in the OTA upgrading process are configured through an OTA service management platform; and after receiving the configuration of the whole vehicle function support and forbidding condition, the vehicle end controller supports and forbids the functions. According to the method, the whole vehicle function support and forbidding conditions related to the OTA activity are configured through the OTA service management platform, and the vehicle end controller supports and forbids the functions after receiving the configuration, so that the flexible configuration of the functions in the OTA upgrading process is realized, and the user experience in the upgrading process is provided.

This utility model relates to the field of municipal sanitation technology and discloses a high-efficiency automatic feeding device for a brake pad powder coating line. It includes a housing, a push handle connected to the surface of the housing, a mounting base connected to the top of the housing, a rotating platform rotatably mounted on the top of the mounting base, multiple feeding mechanisms connected to the bottom of the rotating platform, and multiple material racks and a feeding platform connected to the top of the rotating platform. This utility model, through the arrangement of multiple material racks, can effectively increase the storage capacity to meet the continuous use of the production line. A rotary cylinder can drive the horizontal plate to rotate, and in conjunction with the drive cylinder, the gripping and unloading angles and positions of the feeding mechanism can be precisely adjusted to ensure standardized feeding positions. The feeding mechanism ensures that the gripping position of the brake pads is always consistent, reducing the working stroke of the unloading cylinder. The overall feeding is automated, reducing manpower consumption and improving production efficiency.

The invention relates to the technical field of aviation unit management, and discloses an intelligent scheduling system based on an aviation unit, which comprises a unit management module and an intelligent scheduling module. According to the system, plan operation data and actual operation data of all flights and management data of all crew personnel are obtained through a crew management module and are classified to form a data set, and an intelligent scheduling module judges whether different flights conform to a loop line standard or not, generates a plan data set and a flight loop, optimizes continuous use of crew resources, and improves the working efficiency. The vacancy time is reduced, the unit utilization rate is improved, the flight matching flexibility is high, the intelligent scheduling module evaluates the operation state of each flight ring, generates a flight data set and a scheduling early warning signal, then evaluates the working state of each crew, generates a fatigue index and outputs a corresponding scheduling suggestion, and the scheduling efficiency is improved. The scheduling personnel are helped to visually identify a problem flight ring and a high-risk unit, chain delay is avoided, the overall operation efficiency is improved, and the efficient scheduling optimization effect is good.

This application discloses a device control method and an electronic device, relating to the field of electronic device technology, and applied to electronic devices. It includes: when the electronic device has its sleep aid function activated, acquiring environmental data. If the electronic device detects that the environmental data indicates a resting scenario, and detects that the user's eyes are focused on the display screen, the electronic device acquires the user's sleep aid data. Based on the sleep aid data, when the user is nearing sleep, the electronic device performs corresponding sleep aid operations. These operations include lowering the volume of the electronic device and / or dimming the brightness of the display screen. When it is determined that the user is nearing sleep, the electronic device can remind and assist the user to fall asleep by lowering its own volume or dimming the brightness of the display screen, thereby interrupting the user's continuous use of the electronic device as much as possible. This helps the user fall asleep more easily and quickly, thus improving the user's sleep quality and rest quality.

The invention belongs to the technical field of dust removal equipment, and particularly relates to a negative pressure dust collection device for a straight wire drawing belt sander, the negative pressure dust collection device comprises a dust collection box and a sealing box door, the inner wall of the dust collection box is fixedly connected with a partition plate, and the upper surface of the partition plate is fixedly connected with a suction fan. The negative-pressure dust collecting device can comprehensively absorb metal dust generated by abrasive belt grinding of a steel wire to be boronized under negative pressure, the situation that the metal dust overflows to pollute the environment and harm the health of workers is avoided, the environment friendliness of the wire drawing process is improved, and the device has the online dust removing function through the pulse cleaning mechanism; two dust collecting cloth bags alternately run, so that the use continuity is improved, meanwhile, the device further has the function of aggregating metal powder into blocks, the situation that secondary pollution is generated due to the fact that the metal powder drifts away again in the discharging process of the metal powder in the device is avoided, and the use reliability and efficiency of the device are improved; and the dust-collecting and environment-friendly effects of the device are improved.

There is provided a chemical analyzer equipped with a hollow fiber degassing module that can maintain the original degassing performance even after long periods of continuous use, and can also suppress the proliferation of bacteria and the like. More specifically, a hollow fiber degassing module includes a housing and a hollow fiber membrane disposed in an internal space of the housing. The housing includes a liquid supply unit for connecting an outside of the housing and an internal space of the hollow fiber membrane to each other, and for supplying constant temperature water W, a liquid discharge unit for connecting the internal space of the hollow fiber membrane and the outside of the housing to each other, and for discharging constant temperature water, and a gas discharge unit for connecting an internal space of the housing and the outside of the housing to each other, and for depressurizing the internal space.

This utility model relates to an air duct assembly and a hair dryer, comprising: a housing assembly having a mounting cavity, a first air duct cavity, and a second air duct cavity, the mounting cavity communicating with both the first and second air duct cavities; a first air inlet communicating with the mounting cavity; and a first air outlet and a second air outlet communicating with both the first and second air duct cavities; a fan assembly disposed on the housing assembly and located within the mounting cavity; a heating assembly disposed on the housing assembly and located within the first air duct cavity; and a circuit board assembly disposed on the housing assembly and located within the second air duct cavity. The structural design of this utility model effectively reduces the operating temperature of the circuit board assembly, ensuring continuous use of the hair dryer. By placing the circuit board assembly and the heating assembly within different air duct cavities, the impact of heat generated by the heating assembly during operation on the circuit board assembly can be reduced.

The utility model discloses a self-service machine for warehouse-in and warehouse-out management of medical storage consumables, which belongs to the field of warehouse management and comprises a placing platform, and a fixing seat is arranged on the placing platform. By means of the arranged auxiliary moving structure, when heavy or large consumables are moved and aligned, the universal balls rotate in the mounting supporting base, rolling friction between the consumables and the universal balls is small, the friction force is small, the consumables can be moved conveniently, the mounting supporting base is arranged in the mounting groove and used in cooperation with the protective cover, and under the condition that auxiliary moving is guaranteed, the consumables can be moved conveniently. The protection cover has a protection effect, the integrity of the universal ball and the installation supporting base is guaranteed, an anti-falling structure is arranged on the fixing base, when a card falls off, the card can fall to rubber limiting pieces on an assembly connecting plate, then the card is prevented from falling on the ground, gaps are formed between the rubber limiting pieces, after the card falls into the gaps, the upper portion of the card protrudes, and therefore the card is prevented from falling on the ground. And the device can be quickly held for continuous use.

The utility model discloses a scraper knife for cleaning sidewalk brick joints, which belongs to the technical field of road surface cleaning tools and structurally comprises a knife rest and a shovel head, the shovel head is arranged on the outer side of the middle of the knife rest, the lower end of the shovel head extends towards the joints between adjacent sidewalk bricks, and two ends of the knife rest are respectively and rotatably provided with rotating wheels. The end, close to one side of the middle of the knife rest, of the lantern ring abuts against the inner side face of the end of the rotating wheel. A handle is arranged on the outer side of the middle of the knife rest, and the extending direction of the handle and the extending direction of the shovel head are located on the same virtual straight line. Dirt in brick joints can be scraped, dirt originally located at cleaning dead corners of a broom is exposed, on the basis, the scraper knife is good in continuous use stability, water cannot be left on the surface of a sidewalk, and the scraper knife is suitable for being used in cold areas with low air temperature.

The embodiment of the invention provides a battery peak power determination method and related equipment, and belongs to the technical field of power batteries. According to the embodiment, the peak power value can be output through the peak power prediction model in combination with the real-time terminal voltage, the battery capacity, the total battery capacity and the battery capacity change value of the power battery, the peak power value of the battery is obtained after continuous use, the power of electric equipment using the power battery can be adjusted in time according to the peak power value, and the power utilization efficiency is improved. The power supply function of the power battery is maintained and the service life of the battery is prolonged.

The application provides an IMU calibration method, device, medium and product for an inertial motion capture system, wherein the inertial motion capture system comprises a plurality of IMUs, a calibration parameter solving network and a pose estimation model, the method comprising: S1, obtaining IMU rotation reading sequences of the plurality of IMUs at a fixed time; S2, calculating rotation richness of each IMU rotation reading sequence; S3, inputting each IMU rotation reading sequence into the calibration parameter solving network, estimating calibration parameters of each IMU through the calibration parameter solving network, and updating the calibration parameters whose rotation richness is higher than a predetermined threshold; S4, calculating the updated calibration parameters and the IMU rotation reading sequences corresponding to the updated calibration parameters to obtain global joint poses, and inputting the global joint poses into the pose estimation model. By using the above technical scheme, the accuracy of inertial motion capture is improved, the user experience is optimized, and the inertial motion capture system remains efficient and stable in long-time continuous use.

The present application relates to the field of daily chemical industry and traditional Chinese medicine washing and protecting technology, in particular to a traditional Chinese medicine shampoo for relieving itching, removing dandruff and preventing hair loss and a preparation method thereof, which is prepared from 12 kinds of traditional Chinese medicines, including Platycladus orientalis, Radix Angelicae Sinensis, Radix Polygoni Multiflori, Herba Viscum, Ganoderma lucidum, etc., and auxiliary materials including gelatin, menthol, vitamin E, tea oil, a compound foaming agent compounded from amino acid and coconut oil. The preparation method is to extract effective components of traditional Chinese medicines by three times of high-temperature and high-pressure decoction, filter and concentrate under normal pressure, and then add auxiliary materials in sequence according to ladder type temperature to mix and prepare. The present application has the triple effects of relieving itching, removing dandruff, nourishing blood and hair, and nourishing scalp, is mild and non-irritating, and can reduce dandruff after 3 days of continuous use, has good product stability, and is suitable for long-term use of various hair types.

The utility model discloses a purification device for continuously using chemical treatment liquid of electrical and electrical products, and relates to the technical field of electrical and electrical product processing. The device comprises a shell, a back-flushing anti-blocking assembly and a sediment scraping assembly, a filter screen is fixedly connected to the left side between the front side and the rear side of an inner cavity of the shell, a sewage disposal mechanism is arranged at the top of the shell, the back-flushing anti-blocking assembly comprises a water supply chamber, and the right side of the water supply chamber is fixedly connected with the shell. According to the back-flushing anti-blocking device, through the back-flushing anti-blocking assembly and the cooperation of the filter screen and the pulse jet mechanism, suspended pollutants attached to the surface of the filter screen can be subjected to back-flushing cleaning in the continuous circulation process of chemical treatment liquid, and the pulse jet mechanism impacts holes of the filter screen through periodic high-pressure jet flow, so that blocked dirt particles are effectively removed; the problem that the filtering efficiency of the filter screen is reduced due to pollutant accumulation is avoided. Meanwhile, the water conveying chamber and the conveying pipe form closed circulation, so that the cleanliness of the treating fluid can be maintained without stopping the machine and rotating the tank.

The utility model relates to the field of 3D (three-dimensional) sand mold printing, in particular to a resin heating and heat preservation device and a 3D sand mold printer, which comprise a cylinder body used for accommodating resin and provided with a feed port and a discharge port; the heating mechanism is arranged in the cylinder body; the temperature sensor is arranged in the cylinder body; the temperature controller is arranged on the cylinder body, and the heating mechanism and the temperature sensor are electrically connected with the temperature controller. The temperature control device can accurately control the temperature of resin, ensures that the resin is in a normal state, is directly supplied to the 3D sand mold printer for use, meets the continuous use requirement of the 3D sand mold printer, and also can reduce the loss.