199results about How to "Solve residual problems" patented technology

The invention belongs to the field of microorganisms, and relates to a bacillus velezensis BLS-27 and a fungicide and application thereof, the bacillus velezensis BLS-27 is preserved in China General Microbiological Culture Collection Center on October 21, 2024, the preservation number is CGMCC No.32274, and the preservation address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The strain BLS-27 has an inhibition effect on wild jujube anthracnose pathogenic bacteria, can effectively inhibit various plant disease pathogenic bacteria, shows broad-spectrum antibacterial activity, is environment-friendly and can be widely applied to plant disease control.

The invention relates to the technical field of welding, in particular to railway track laying welding equipment which comprises an adjusting and supporting mechanism, a polishing mechanism and a welding mechanism. The adjusting and supporting mechanism is fixed to the two rail bodies with the gap and can adjust the two rail bodies with the gap to the proper distance. The grinding mechanism can slide longitudinally and transversely relative to the adjusting and supporting mechanism. And the welding mechanism is used for welding a welding seam between the two rail bodies. The grinding mechanism comprises a grinding part and a collecting cover with a magnetic adsorption part on the inner side, the adsorption cover collects chippings generated by grinding, and a cleaning wheel is arranged at the edge position of the collecting cover and can clean the chippings attached to the welding seam and enable the chippings to be adsorbed to the magnetic adsorption part on the inner side of the collecting cover. The problem of residue of grinding scraps can be reduced, slag inclusion during welding is eliminated, the welding quality of the railway track is improved, and the service life of the railway track is prolonged.

The invention discloses a preparation method of a sodium ion positive electrode binder, which is characterized in that a carboxyl-containing olefine acid monomer is introduced into a vinylidene fluoride structure, so that a carboxyl group is embedded into the molecular structure of the binder, and the dual functions of neutralization and binding are realized. According to the method, through emulsion or suspension polymerization, the prepared binder can gradually neutralize alkaline residues of the sodium ion positive electrode material in the preparation of the positive electrode slurry, and the problems of acid-base imbalance and impurity residues caused by traditional additional organic acid are avoided, so that the jelling phenomenon is effectively inhibited. The embedded design simplifies the formula, improves the material purity, and significantly improves the fluidity and coating consistency of the slurry. In addition, the introduction of carboxyl improves the bonding performance of the binder, reduces the use amount of the binder, and increases the filling proportion of the active material, thereby improving the specific energy of the battery, reducing the internal resistance, enhancing the peeling strength of the pole piece, prolonging the cycle life of the pole piece, and showing excellent stability in the application of the sodium ion battery.

The invention discloses a ball mill lining grinding structure and a ball mill, and relates to the technical field of ball mills, a fixing mechanism comprises an arc-shaped groove, a clamping ring, a clamping plate and a clamping assembly, the arc-shaped groove is formed in the end face of a lining grinding plate, the two sides of a groove cavity of the arc-shaped groove are open, the clamping ring is placed in the arc-shaped groove, and the clamping plate is arranged in the clamping assembly. According to the device, the fixing mechanism is arranged, each lining grinding plate is clamped in the inner side of the ball mill barrel through the clamping assemblies, the clamping rings are clamped in the arc-shaped grooves, so that the end faces of the lining grinding plates are aligned, and the lining grinding plates are clamped in the arc-shaped grooves, so that the lining grinding plates are clamped in the arc-shaped grooves, and the lining grinding plates are clamped in the arc-shaped grooves; and the clamping ring is fixed by inserting the clamping plate into the positioning groove, so that the clamping ring is firmly clamped in the arc-shaped groove, and the lining grinding plate is fixed in the ball mill barrel, so that hole sites are prevented from being formed in the lining grinding plate, the problem of powder residue is avoided, and the whole mounting is convenient.

The invention provides a uric acid reducing composition containing fructus gardeniae and a preparation method of the uric acid reducing composition, and belongs to the technical field of medicines. The preparation method comprises the following steps: fermenting mulberry leaves, chicory, cape jasmine and kudzu vine roots through lactobacillus rhamnosus and bifidobacterium longum, separating probiotics from fermentation liquor, adding immobilized ionic liquid into the fermentation liquor, introducing carbon dioxide for adsorption, filtering, adding solids into ethanol, heating for desorption, concentrating to obtain an extract 1, precipitating filtrate with ethanol to obtain an extract 2, and carrying out freeze-drying to obtain the folium mori-chicory-cape jasmine extract. The preparation method comprises the following steps: embedding probiotics together with sodium alginate to prepare a uric acid-reducing embedding material, and uniformly mixing the uric acid-reducing embedding material with the extract 1, vitamin C and tea polyphenol to prepare the uric acid-reducing composition containing fructus gardeniae. The prepared uric acid reducing composition containing fructus gardeniae can promote uric acid excretion, inhibit sodium urate crystallization, improve the antioxidant effect, repair intestinal barriers, relieve inflammation, inhibit xanthine oxidase (XOD) activity and expression and reduce the blood uric acid level, has a good uric acid reducing effect and has a wide application prospect.

The invention relates to an antibiotic-free feed additive for breeding crucian carps and a preparation method of the antibiotic-free feed additive, and belongs to the technical field of feed additives. According to the feed additive, seaweeds and Chinese herbal medicines are used as raw materials and are subjected to staged fermentation with compound probiotics, a phagostimulant is added, and freeze drying is performed to prepare the antibiotic-free crucian breeding feed additive, so that the prevalence rate of crucian can be reduced, the survival rate can be increased, and the growth of crucian can be accelerated; the problem of drug resistance caused by antibiotic abuse in crucian breeding in the prior art can be solved, and unification of high antibacterial activity, biological safety and environmental friendliness in crucian breeding is achieved.

The invention provides a preparation method of a nanometer transistor sensing platform and the nanometer transistor sensing platform, and the method comprises the steps: attaching a first photoresist layer and depositing a sacrificial layer on a completed back gate device, enabling the first photoresist layer to cover a metal electrode, and enabling the sacrificial layer to cover the first photoresist layer and a channel region; removing the first photoresist layer and stripping the sacrificial layer covering the first photoresist layer so as to retain the sacrificial layer in the channel; depositing a passivation layer on the sacrificial layer in the metal electrode and the channel; attaching a second photoresist layer on the passivation layer to expose an area needing to be etched and removed; etching the passivation layer corresponding to the channel region and a part of the metal electrode; and removing the second photoresist layer, and removing the sacrificial layer in the channel. The sacrificial layer reserved in the channel region can greatly protect the channel material layer in the subsequent steps, so that the problem of photoresist residue in the traditional process is perfectly solved, and a more stable basis is provided for application of a biosensor and the like.

The semiconductor pressure reducing valve comprises a valve body, a rear cover, a lock nut and a handle, the tail end of an inlet channel of the valve body is arranged to be of a reducing opening structure, a valve body is arranged in the inlet channel, the upper portion of the valve body is connected with a valve body valve rod, and the upper end of the valve body valve rod is fixedly connected with the bottom of a membrane head connecting block; a spring pressing block, a buffer spring, a diaphragm head, a diaphragm pressing block and a diaphragm are sequentially arranged in the rear cover from top to bottom, the outer periphery of the diaphragm is fixed between the diaphragm pressing block and the upper end of the valve body, the inner periphery of the diaphragm is fixedly connected with the lower portion of a diaphragm head connecting block, and the upper portion of the diaphragm head connecting block is fixedly connected with the bottom of the diaphragm head. By improving the structure of the valve body, a spring on the lower portion of the valve body is omitted, and it is guaranteed that a medium channel is closed in a non-working state by means of fixed connection of the membrane head connecting block and the valve rod of the valve body; opening of the medium channel is guaranteed by rotating the handle and pressing down the valve rod of the door body, the dead volume in the medium channel is greatly reduced, the problems of gas residue and adsorption are solved, and favorable conditions are provided for meeting the requirement for gas cleanliness.

The utility model is suitable for the technical field of kitchen tools, and provides a meat quality detection device, which comprises a shell, a detection device and a control device, the detection head is inserted into the socket and is provided with a plurality of detection electrodes; the grip is fixedly arranged on the detection head and is provided with a lead; the scrubbing mechanism is arranged on the inner wall of the shell and is used for scrubbing the detection head and the plurality of detection electrodes; and the water spraying mechanism is arranged on the scrubbing mechanism and is used for spraying cleaning liquid to the detection head and the plurality of detection electrodes. According to the meat quality detection device provided by the scheme, water-injected meat can be detected and judged, and the detection head and the detection electrode can be cleaned after detection is completed, so that the detection head and the detection electrode are relatively convenient to clean.

The present application provides a method for preparing a chip-type three-terminal capacitive filter, comprising: arranging a first inner electrode layer and a second inner electrode layer which are arranged at intervals on a dielectric diaphragm, the dielectric diaphragm provided with the first inner electrode layer being a first region, the dielectric diaphragm provided with the second inner electrode layer being a second region, the number of the first inner electrode layer and the second inner electrode layer being at least two and being arranged at intervals, and the areas of the first region and the second region being the same; stacking the dielectric diaphragm provided with the first inner electrode layer on the dielectric diaphragm provided with the second inner electrode layer to form a laminated semi-finished product, wherein, in a direction from the first inner electrode layer toward the second inner electrode layer, the orthographic projection of the first inner electrode layer and the orthographic projection of the adjacent second inner electrode layer stacked below the first inner electrode layer are arranged at intervals; and cutting the laminated semi-finished product to form a chip-type three-terminal capacitive filter, so as to achieve the purpose of reducing internal stress.

The invention relates to the technical field of composite material manufacturing, in particular to a continuous fiber reinforced thermoplastic composite material mold pressing feeding device which comprises a supporting frame, a plurality of rollers are rotationally connected into the supporting frame, and one end of each roller extends out of the supporting frame and is coaxially and fixedly connected with a chain wheel. A driving assembly for driving the rollers to rotate is arranged at one end of the supporting frame, and the chain wheels are in chain transmission with the driving assembly; a plurality of L-shaped transverse plates transversely arranged between every two adjacent rollers are arranged on the lower portion of the supporting frame, first motors are installed on the long edges of the L-shaped transverse plates, output shafts of the first motors are coaxially and fixedly connected with a plurality of eccentric wheels, and the ends, away from the first motors, of the output shafts are rotationally connected with the short edges of the L-shaped transverse plates; the sieve plates are located in the motion trail of the eccentric wheel. Vibration dust removal of the fiber material is synchronously completed in the feeding process, so that the fiber surface cleanliness and the resin impregnation uniformity are remarkably improved, and the mechanical property and the surface quality of the finished composite material are improved.

This utility model discloses a cleaning device for screen printing plates of a screen printing machine, including a housing. A motor is fixedly installed on one side of the housing. The output end of the motor rotates through the housing and is fixedly connected to a first lead screw. A circular hole is opened on one side of the housing, and a second lead screw is installed in the circular hole. One end of the second lead screw is rotatably connected to the inner wall of one side of the housing. Two sets of guide rods are installed inside the housing, with two guide rods in each set. A transmission assembly consisting of a motor, the first lead screw, the second lead screw, the first synchronous pulley, the second synchronous pulley, and the first synchronous belt drives a slider and a diverter box to move back and forth between fixed plates. The nozzles on the diverter box can spray water from both sides to clean the printing plate. Compared with traditional single-sided cleaning, the ink on both sides of the printing plate is washed away at the same time, solving the problem that the traditional method cannot take care of both sides, resulting in ink residue in the mesh and corners. This greatly improves cleaning efficiency and reduces cleaning time and labor costs.

The utility model relates to the field of nylon raw material storage, and discloses a nylon raw material storage box with a drying function, which comprises a box body with an opening at the bottom and used for storing nylon raw materials; the material collecting part is mounted at the bottom opening of the box body and is used for collecting nylon raw materials; the material taking mechanism is mounted in the box body, one end of the material taking mechanism is connected with the material collecting part, and the other end of the material taking mechanism penetrates through the top of the box body, extends to the outer side and is used for taking out the nylon raw materials in the box body. According to the utility model, the material taking mechanism connected with the material collecting part is arranged at the top of the box body, so that the complexity of material taking operation is avoided, the combination of the material taking mechanism and the material collecting part ensures that nylon raw materials can be effectively gathered and smoothly taken out, and the fan can convey dry gas to the bottom of the box body through the material taking mechanism; dry gas can uniformly cover the whole box body, so that moisture is effectively discharged, and the nylon raw material is always in a dry state.

The water inlet box assembly of the washing machine comprises a water inlet box, and the water inlet box is provided with a cavity. The washing powder drawer is arranged in the cavity and is provided with a washing agent accommodating chamber for accommodating a washing agent; the washing machine comprises a washing machine body, a cavity is formed in the washing machine body, the washing machine body comprises a washing agent containing chamber and a shower head component, the shower head component is arranged in the cavity, a protruding structure extending into the washing agent containing chamber is arranged on the shower head component, a water outlet is formed in the protruding structure, and water flow flowing through the water outlet can be sprayed to the inner side wall of the washing agent containing chamber. Water flow of the shower head washes the inner side wall of the detergent containing chamber without dead corners, and therefore the problem that detergent remains on the inner side wall of the detergent containing chamber is solved.

The invention discloses a wet garbage pyrolysis treatment device which comprises a feeding and gas producing structure, a cracking structure, a heating structure, a heat preservation structure, a charcoal collecting structure and a driving part, the cracking structure, the heating structure and the heat preservation structure are arranged from inside to outside, and the feeding and gas producing structure is located at the top of the heat preservation structure; the biochar collecting structure is located at the bottom of the interior of the cracking structure, the driving part is arranged on one side of the exterior of the heat preservation structure, the output end of the driving part penetrates through the heat preservation structure to be connected with the cracking structure, and the device has the advantages of being high in treatment efficiency, small in secondary pollutant generation amount and the like.

The invention relates to the technical field of display, and particularly provides a display panel, a display device and a preparation method of the display panel, the display panel comprises a substrate, a pixel definition layer and an isolation structure, the pixel definition layer is located on one side of the substrate, the pixel definition layer comprises a first pixel definition part and a second pixel definition part, a pixel opening is defined by the first pixel definition part, and the second pixel definition part is located on the side, back to the pixel opening, of the first pixel definition part; the isolation structure is located on the side, back to the substrate, of the pixel definition layer and comprises a first end part and a second end part, the first end part makes contact with the surface of the side, back to the substrate, of the second pixel definition part, the second end part is located on the side, back to the substrate, of the first end part, an isolation opening is defined by the isolation structure, and the pixel opening is located in the isolation opening; the maximum thickness of the first pixel defining portion is smaller than the thickness of the second pixel defining portion in the direction perpendicular to the plane where the substrate is located. The use effect of the display panel can be improved through the first pixel definition part.

The utility model discloses a raw material mixing device for medicine production, which relates to the technical field of medicine production and comprises a supporting seat, a tank body is fixedly mounted on the upper surface of the supporting seat, a sealing cover is fixedly mounted at the top end of the tank body, and a speed reducing motor is fixedly mounted on the upper surface of the sealing cover. A stirring shaft is installed at the output end of the gear motor, a plurality of stirring blade plates are fixedly connected to the outer surface of the stirring shaft, a feeding pump and a discharging pump are fixedly installed on the upper surface of the supporting base, and the output end of the feeding pump fixedly communicates with a discharging pipe; and the end, away from the feeding pump, of the discharging pipe penetrates through the sealing cover and extends into the sealing cover, the input end of the discharging pump fixedly communicates with a communicating pipe, and the top end of the communicating pipe fixedly communicates with the bottom end of the tank body. The device is reasonable in design structure, can automatically discharge materials, solves the problem that mixed liquid medicine remains in the device, and is convenient for subsequent production and processing.

The invention discloses a green ecological healthy aquaculture mineral source humus micro-powder preparation, which is characterized in that the preparation is prepared from a natural mineral source humus raw material, mainly lignite, which is treated by a high-tech mechanical superfine grinding processing technology to obtain superfine powder, the organic matter content of the superfine powder is greater than 80%, the humic acid content is greater than 40%, and the mineral source humus micro-powder preparation is prepared from the mineral source humus raw material. The preparation is prepared by using natural mineral source humus as a raw material through a high-tech mechanical superfine grinding processing technology, has the characteristics of high organic matter content and high humic acid content, can effectively improve aquaculture water quality and promote healthy growth of aquatic products, reduces the use of chemicals, guarantees food safety and ecological environment, and has a wide application prospect. By controlling the granularity of the mineral source humus micro powder preparation, the preparation has larger specific surface area and more surface defects, so that the biological activity and solubility of the preparation are enhanced. Therefore, the preparation can be dissolved into the water body more quickly, and the effects of purifying water quality and promoting ecological balance are achieved.

The invention relates to the field of powder metallurgy, and discloses a planet defending device and method for an atomizing chamber. The planet defending device for the atomizing chamber comprises an arc-shaped baffle, the arc-shaped baffle comprises an arc-shaped fixing base and a baffle body, the arc-shaped baffle body is fixed to the side wall of the atomizing chamber through the arc-shaped fixing base, the arc-shaped fixing base comprises an outer contact face and an inner blocking face, and an acute angle is formed between the outer contact face and the side wall of the atomizing chamber in the direction of the inner blocking face. The position of the outer contact surface in the horizontal direction does not exceed the position of the feed port of the atomizing chamber; the baffle is in smooth connection with the arc-shaped fixing base, the acute angle formed by the baffle and the side wall of the atomizing chamber in the direction of the inner blocking face is smaller than the acute angle formed by the outer contact face and the side wall of the atomizing chamber in the direction of the inner blocking face, the free end of the baffle is an inclined face, and the inclined face inclines towards the direction of the inner blocking face in the vertical direction. Cooled and solidified fine powder particles are prevented from colliding with liquid particles or semi-liquid particles on the lower middle portion of the atomization area, and the forming degree of a satellite ball is reduced.

The invention relates to the technical field of nano materials, in particular to a preparation method of a Zn-based bimetal MOFs material and application of the Zn-based bimetal MOFs material as a medical drug carrying material. The preparation method comprises the following steps: preparing Zn, Mn and a ligand according to a molar ratio of 1: 1: (72-80), and mainly comprises the steps of preparation of metal salt solutions, coordination polymerization reaction, separation and purification, and drying. The process for preparing the Zn-based bimetallic MOFs material is simple and environmentally friendly, the obtained product has the excellent performance of being small in particle size, regular and stable, and the material loaded with doxorubicin hydrochloride has high loading rate and has potential clinical conversion value.

The invention provides a preparation method of an adhesive-free solvent-free UV-cured wafer grinding protective film suitable for a large-particle-size wafer with a bump / a copper cylinder / a solder ball, and relates to the technical field of special-effect film structures. The preparation method comprises the following steps: uniformly mixing and stirring the components in the adhesive layer; uniformly coating the surface of the base film with the obtained material; carrying out UV curing; and adding a release film on the surface of the UV-cured adhesive layer to obtain the wafer grinding protective film. The wafer grinding protective film is prepared by adopting a UV curing process, the scheme is more environment-friendly while the application requirement is met, and the specific main polymer is adopted in the protective film adhesive layer, so that the obtained wafer grinding protective film shows the effect of no adhesive at the use temperature while achieving high adhesive force on the surface of a large-particle-size wafer, and the wafer grinding protective film is more environment-friendly. The special requirement in the grinding process of the large-particle-size wafer with the protruding block / copper column / tin ball can be met, and the efficiency and the yield of the wafer manufacturing process are improved.

The utility model discloses a kind of garbage incineration furnace mouth real-time observation devices, including furnace wall, glass observation window is fixedly connected in the middle of furnace wall, two groups of connecting frames are fixedly connected in the inside of furnace wall, two groups of guide rods are fixedly connected between the inside of connecting frame, sliding plate is slidably connected on the outside of guide rod, first rack is fixedly connected in the lower part of sliding plate, first gear is engagedly connected in the lower part of first rack, lower rotating shaft is fixedly connected in the middle of first gear, rotating shaft other end penetrates to the outside of furnace wall, sliding slot is set in the inside of sliding plate, sliding piece is slidably connected in the inside of sliding slot, connecting rod is fixedly connected in the side of sliding piece, scraper is fixedly connected with the other end of connecting rod penetrating to the outside of sliding plate, first spring is fixedly connected between sliding piece and sliding slot inner wall, first spring is sleeved on the outside of connecting rod, avoid dusting residual problem, ensure that observation window maintains high transmittance.

The utility model discloses a cleaning device for edible mushroom production, which comprises a frame mechanism, a vibration cleaning mechanism is fixedly mounted at the top of the frame mechanism, a gas cleaning mechanism is fixedly mounted on one side of the frame mechanism, a uniform cleaning mechanism is fixedly mounted at the top of the frame mechanism, and the vibration cleaning mechanism comprises a vibration frame. A vibration motor is fixedly mounted on one side of the vibration frame, a sieve plate is fixedly mounted in the vibration frame, a bottom plate is fixedly mounted at the bottom of the sieve plate, the frame mechanism comprises a mounting frame, a limiting rod is fixedly mounted in the mounting frame, and a plurality of nozzle mounting blocks are movably mounted on the surface of the limiting rod; a vibration motor drives a vibration frame to vibrate so as to drive a sieve plate and a bottom plate to vibrate, dust and impurities on the surface of edible mushrooms on the surface of the sieve plate fall into the surface of the bottom plate through the sieve plate under the vibration effect, and meanwhile, a high-pressure air pump provides high-pressure air flow which passes through a first connecting pipe and a second connecting pipe and is finally blown to the mushrooms through a high-pressure nozzle.

The invention discloses a cleaning and disinfecting device for an ultrasonic probe, and relates to the technical field of cleaning and disinfecting of the ultrasonic probe, the cleaning and disinfecting device comprises a cleaning and disinfecting structure, and the cleaning and disinfecting structure comprises three water pumps fixedly connected to a supporting base; the ends, away from the supporting base, of the three water pumps are movably connected with water conveying pipes, and the spraying assemblies are fixedly connected to the ends, away from the water pumps, of the water conveying pipes and arranged on the inner surface of the shell. The spraying assembly comprises a supporting base, a connecting piece fixedly connected to the supporting base, a groove located below the connecting piece, a fixed base fixedly connected to the groove, a flapping assembly fixedly connected to the fixed base, and a triggering assembly fixedly connected to the supporting base and located on one side of the spraying assembly. According to the ultrasonic probe cleaning device, the ultrasonic probe cleaning efficiency is improved, the cleaning comprehensiveness is remarkably improved, and it is ensured that all the positions of the surface of a probe can be fully cleaned.

The utility model discloses a kind of sterilization equipment for injection with purification mechanism, it is related to injection production sterilization appliance technical field, including protection bucket and the mounting table of fixedly connected in the lower end of protection bucket, protection bucket top end is equipped with protective cover, protection bucket one side middle section is equipped with radiation cover, radiation cover is communicated with protection bucket inner chamber one side, and gamma emitter is installed in radiation cover, and the inside of protection bucket is equipped with sterilization assembly;In the utility model, through the cooperation between filter cover and purification net, the impurities of the entering injection are primarily filtered by purification net to remove, the problem of high initial impurity content of injection is solved, and the preliminary purification efficiency of injection is improved;Through the cooperation between nano filter screen and filter bucket, the injection primarily purified is secondarily filtered by nano filter screen, the effect of secondary sterilization and purification is played, the problem of microbial residue in injection is solved, and the cleanliness of injection is improved.

The invention belongs to the field of ships, and discloses an automatic exhaust system suitable for an oil-water replacement cabin of a ship, comprising a medium sensor used for detecting the type of a medium discharged from a cabin body; the control box is electrically connected with the medium sensor and is used for receiving and processing a medium type signal output by the medium sensor; the electric valve is used for controlling on-off of a medium discharged from the cabin body; and the control box controls the on-off of the electric valve according to a signal transmitted by the medium sensor. The closing time of the electric valve is accurately controlled through the medium sensor, and then air residues on the top of the replacement cabin are reduced.

This invention discloses a solid material feeding device for a cooking machine, relating to the field of cooking machines. It includes a feeding box, which is a container with an opening at one end. A feeding assembly is installed inside the feeding box, including a feeding rack that can move along its length inside the feeding box, pushing the material inside the box to the opening end and feeding it into the cooking pan. Vertical cavities are formed on both sides of the feeding rack, each housing a vertical brush roller. A horizontal cavity is formed at the bottom of the feeding rack, housing a horizontal brush roller. This invention integrates the feeding rack with the cleaning structure, simultaneously feeding solid material and driving the vertical and horizontal brush rollers to rotate synchronously, thoroughly cleaning the side walls and bottom surface of the feeding box. This effectively solves the problem of material residue and avoids food safety hazards caused by accumulated dirt.

The present invention discloses a floor brush for a floor scrubber, the floor brush having a front end and a rear end, a scraper bar being provided at the front end of the floor brush; the scraper bar having at least the following two working positions: (1) a water scraping working position: when the floor brush moves backward, the scraper bar becomes a basically downward state, and the bottom end of the scraper bar abuts against the surface to be cleaned to scrape off water stains on the surface to be cleaned; (2) a suspended working position: when the floor brush moves forward, the scraper bar becomes a suspended state, and the bottom end of the scraper bar is away from the surface to be cleaned. The floor brush is particularly suitable for household floor scrubbers. By providing a scraper bar at the front end of the floor brush, water on the surface to be cleaned can be scraped off when the floor brush moves backward, thereby avoiding residual water stains.

The present invention belongs to the field of pharmaceutical and chemical technology, and specifically refers to a barreled feeding device for toxic or corrosive liquids, including a sealed box, a volatilization overflow prevention mechanism, a quantitative feeding mechanism, an auxiliary mechanism and a sealing mechanism, wherein the volatilization overflow prevention mechanism is arranged inside the sealed box, the quantitative feeding mechanism is arranged on the inner side wall of the sealed box, the auxiliary mechanism is arranged on the inner side wall of the sealed box, and the sealing mechanism is arranged on the side wall of the sealed box. The present invention is provided with a gas cleaning mechanism, controls the electric-controlled three-way valve, uses nitrogen to purge liquid through the air inlet pipe, and enters the transfer barrel, purges the toxic gas volatilized from the liquid inside the overflow prevention cylinder and the transfer barrel, and discharges the sealed box through the sewage pipe into the external waste gas treatment system, thereby achieving the technical effect of cleaning the contact parts with toxic and corrosive liquids and preventing the toxic liquids from volatilizing and overflowing, and effectively solves the technical problems of toxic or corrosive liquid residue and volatilization in the prior art.

The utility model relates to the technical field of p-hydroxyacetophenone production, in particular to a filtering device for p-hydroxyacetophenone production, which comprises a box body, a feeding hole is formed in the top of the box body, a vibrating plate is mounted in the middle of the interior of the box body, and a screening box is mounted in the middle of the vibrating plate in a penetrating manner; a first filter screen and a second filter screen are installed in the screening box, vibration filtering devices are fixedly installed on the inner walls of the two sides of the box body at the bottom of the vibration plate in a front-back mode, and a collecting box is placed under a discharging port in the bottom of the screening box. A feeding port is formed in the top of a box body, a vibration plate connected with a material screening box in a penetrating mode is installed in the middle of the interior of the box body, a first filter screen and a second filter screen are installed in the material screening box, a vibration filtering device is fixedly installed at the bottom of the vibration plate, and a material collecting box is placed under the bottom of the material screening box. The two filter screens are mounted in the screening box, and are matched with the vibrating plate and the vibrating filter device to secondarily filter and screen hydroxyacetophenone, so that the problem that few impurities are left after filtration is solved.