784 results about "Filter paper" patented technology

The invention relates to the technical field of suction filtration, and particularly discloses a negative pressure suction filtration device which comprises a base, a funnel and a suction filtration bottle which are distributed from top to bottom are arranged on the base, a filter paper alternation structure capable of replacing filter paper is arranged between the funnel and the suction filtration bottle, and the funnel and the filter paper alternation structure are detachably connected with each other. The filter paper alternation structure and the suction filtration bottle are detachably connected with each other; through a rotating disc and an intermittent driving mechanism of the filter paper alternating structure, the filter paper can be automatically replaced under the condition that the whole device is not disassembled, and the operation continuity and efficiency are greatly improved; the first elastic pressing structure and the second elastic pressing structure ensure that the lower abutting pipeline is tightly attached to the upper annular sliding groove and the upper abutting pipeline is tightly attached to the lower annular sliding groove through the elastic force of the spring, the sealing effect of the first sliding cover and the sealing effect of the second sliding cover are combined, liquid leakage under the condition that the filter paper is automatically replaced is effectively prevented, and it is guaranteed that the negative pressure environment is stable.

The application discloses a new device for pre-acidification process combined with cathode buffer zone electric dynamic remediation of heavy metal contaminated soil and a construction method, and belongs to the field of electric dynamic remediation of heavy metal contaminated soil. The device comprises a soil remediation chamber and a sewage treatment chamber. The soil remediation chamber is open at the top, is provided with an anode plate on one side, and is provided with a cathode plate on the opposite side. Filter paper is attached to the two sides of the anode plate and the cathode plate. The cathode plate is further provided with a cathode buffer chamber opposite the anode plate. The anode plate and the cathode plate are connected through wires, a power supply and a sensor. The soil remediation chamber is connected with the sewage treatment chamber on the side provided with the cathode plate, and a gap is formed between the soil remediation chamber and the sewage treatment chamber to allow liquid to flow from the soil remediation chamber into the sewage treatment chamber. The sewage treatment chamber is provided with adsorption material. The sewage treatment chamber is provided with a drainage hole and a drainage pipe at the bottom end. The method can effectively remove heavy metals in sewage and can avoid the possibility of secondary pollution of the environment caused by electric dynamic remediation of sewage.

A method for preparing baking soda from baking soda desulfurized fly ash comprises the following preparation steps: step 1, dissolving baking soda desulfurized fly ash in water to obtain a mixed solution A; 2, filtering the mixed solution A through microporous filter paper or a filter membrane to obtain supernate B; step 3, mixing and stirring the supernate B and a precipitant C for 1-5 hours to obtain a mixed solution D; step 4, filtering the mixed solution D through microporous filter paper or a filter membrane to obtain a supernatant E; step 5, adding 1-8% of a regulator F into the supernate E, and uniformly stirring to obtain liquid G; step 6, continuously adding aeration H into the liquid G, and adjusting the pH to be alkaline to obtain a solution J; 7, the solution J is heated, evaporated and crystallized, solid crystals are obtained and fully ground, and regenerated baking soda can be obtained; the preparation method is simple, the recovery rate of baking soda is high, and large-scale batch production can be carried out.

The invention discloses a method for preparing multifunctional oil-water separation paper through ZIF-67 in-situ growth on the surface of polydopamine coated fiber, and belongs to the technical field of preparation of fiber materials and composite materials thereof. The problems existing in an existing oil-water separation material preparation technology are solved. The method comprises the following steps: filter paper surface pretreatment; growing the MOF particles; and hydrophobic treatment. The product provided by the invention has self-cleaning and organic oil separation performances; the polydopamine and the silane with amino have rich amino, so that the polydopamine and the silane with amino have very high positive charge density during protonation, bacteria with negative charges can be attracted through electrostatic interaction, and the polydopamine and the ZIF-67 particles have a synergistic effect, so that the polydopamine and the ZIF-67 particles have an excellent inhibition effect on staphylococcus aureus. Oriented growth and controllability of MOF particles are achieved through loading of polydopamine on the surfaces of the fibers, and the super-hydrophobic paper is obtained; the method is simple, the process is easy to control, the cost is low, pollution is avoided, the oil-water separation performance is excellent, and the oil-water separation and antibacterial performance is achieved while the economic value of the filter paper is improved.

The invention provides a device and a method for accurately determining suspended matters in water, and relates to the technical field of water quality detection. The device for accurately measuring the suspended matters in the water comprises a bracket, a container, a glass funnel, a pear-shaped separating funnel and filter paper, the pear-shaped separating funnel is fixed on the bracket, is arranged above the glass funnel and is used for conveying liquid into the glass funnel; the glass funnel is arranged at a bottle opening of the container; the filter paper is arranged in the glass funnel; and a liquid outlet pipe orifice of the pear-shaped separating funnel extends into a position which is 1 / 2-2 / 3 of the height of the horn part of the glass funnel. The method for measuring the suspended matters in the water by adopting the device has the advantages that the filtering efficiency is improved, the measurement error is reduced, and the manpower and time are saved.

The utility model relates to the field of portable sewage suction filtration devices, and discloses a portable sewage suction filtration device for water environment pollution control, which comprises a portable sewage suction filter, a support frame is fixedly mounted at the bottom of one side of the portable sewage suction filter, and a collection bottle is placed on the upper surface of the support frame. A supporting table is fixedly mounted on one side of the upper surface of the portable sewage suction filter, a filter box is mounted on the upper surface of the supporting table, a plurality of mounting grooves are formed in the bottom of one side of the outer surface of the filter box, placing frames are mounted in the mounting grooves, filter paper is placed in the placing frames, and sealing clamping blocks are mounted outside the positions, penetrating through openings of the mounting grooves, of one sides of the placing frames. According to the portable sewage suction filter, a plurality of pieces of filter paper are mounted in the filter box through the placement frame, so that the effect of conveniently replacing the filter paper is achieved, the overall filtering effect of the filter box on sewage is improved, the problem that the filter paper is blocked by impurities to affect the collection of filtered water by a collection bottle is solved, and the overall use efficiency of the portable sewage suction filter is improved.

The utility model discloses a trolley for transporting filter paper, which relates to the technical field of mechanical transportation equipment, a main body frame comprises a bottom plate and side plates at two ends, sliding rods are fixed on two sides of the side plates and penetrate into a transverse pressing plate, a pressing component is arranged at the top, and rotating wheels are arranged at the lower end of the bottom plate. The downward pressing assembly is composed of a fixing plate, a vertical pressing plate and a cross connecting rod, and power is provided through a second hydraulic cylinder, so that pressing and loosening of the vertical pressing plate are achieved. A side plate on one side of the main body frame is slotted, and an L-shaped baffle extends out to fix a first hydraulic cylinder and control a transverse pressing plate to move transversely. The transverse pressing plate is provided with an avoiding groove, and interference with the vertical pressing plate is avoided. During working, an operator pushes the trolley in place, after filter paper is placed, the second hydraulic cylinder is started for pressing, and the first hydraulic cylinder is started when the transverse position needs to be adjusted. Compared with the prior art, the trolley is convenient to operate and accurate in positioning, filter paper can be effectively fixed, the operation process is optimized, the working efficiency is improved, and the filter paper transportation stability and reliability are improved.

The utility model relates to the technical field of engine oil filters, and discloses a long-life engine oil filter which comprises a shell mechanism, a sealing cover mechanism is fixedly arranged on the upper end face of the shell mechanism, a first clamping mechanism is fixedly arranged on the lower end face of the sealing cover mechanism, and a filter cartridge mechanism is fixedly arranged on the lower end face of the first clamping mechanism. A second clamping mechanism is fixedly arranged on the lower end surface of the filter cartridge mechanism, and filter paper is clamped between the first clamping mechanism and the second clamping mechanism. According to the filter, the upper end and the lower end of the filter paper can be clamped and fixed in the clamping grooves and are adhered by using an adhesive, so that the adhesion strength of the filter paper can be greatly improved, and the service life of the filter is prolonged; and the magnetic attraction block can attract and collect metal impurities in unfiltered engine oil into the storage groove to prevent the metal impurities from scouring the filter paper to cause breakage of the filter paper, so that the filtering efficiency of the filter is improved.

The invention discloses a rubber ring filter paper tool clamp applied to filter element production of a filter, which comprises a rack and a turntable, a mold frame is arranged on the periphery of the turntable, a filter paper positioning mold is arranged at the upper part of the mold frame, a rubber ring positioning mold is arranged at the lower part of the mold frame, a filter paper positioning hole is formed in the filter paper positioning mold, and a rubber ring positioning hole is formed in the rubber ring positioning mold. The rubber ring positioning die is provided with a rubber ring placing wheel and a heating rotating wheel which correspond to the filter paper positioning hole in position and are connected with each other up and down, and the rubber ring positioning die is connected with an upward pulling power source. The full-process work of discharging and positioning of filter paper and plastic rubber rings, heating and softening of the plastic rubber rings, upward pulling and lifting and the like can be automatically completed, full preparation is made for welding combination of the bottom of the filter paper and the softened plastic rubber rings, and intermediate manual operation is not needed; the automation degree is high, the working efficiency is high, firmness and reliability are achieved, the machining quality is uniformly guaranteed, and therefore the quality of filter element assembly finished products is obviously improved.

The utility model provides a parallel suction filtration device and system, and the parallel suction filtration device comprises a liquid storage cavity which is used for storing liquid to be filtered, the bottom of the liquid storage cavity is provided with an opening, and the opening is provided with an embedded structure; the funnel comprises a funnel body, a plane used for placing filter paper is arranged above the funnel body, a connecting piece matched with the embedded structure is arranged in the circumferential direction of the plane, and the filter paper is fixedly connected with the connecting piece through the embedded structure; a filter pipe is connected below the funnel body; the liquid collection bottle comprises a bottle body and a bottle cap which are detachably connected in a sealed mode, the bottle cap is connected with the filter pipe, and at least two air pipes are further arranged on the bottle cap and used for communicating the interior and the exterior of the bottle body; the air pipes of different liquid collecting bottles are connected through a connecting pipe, so that air path communication is achieved between the liquid collecting bottles, and the connecting pipe is further connected with a vacuum pump. The parallel rapid filtering device is suitable for parallel rapid filtering of various samples.

The invention discloses a preparation method of a portable paper-based ratiometric fluorescence sensor APBA-CsPbBr3 at-UiO-66 / Ru, which comprises the following steps: 1, adding lead bromide and cesium bromide into N, N-dimethylformamide, then adding 5-bromovaleric acid and an oleylamine ligand, and stirring; 2, perfluorooctyltriethoxysilane is added, and a precursor solution is obtained; 3, adding zirconium chloride and terephthalic acid into N, N-dimethylformamide to obtain a homogeneous solution; 4, after heating, UiO-66 is obtained; 5, stirring the precursor solution, APBA, UiO-66 and tris (2, 2-dipyridyl) ruthenium chloride hexahydrate to obtain a composite material; and 6, dropwise adding the composite material solution into the filter paper. The APBA modified material is adopted as a recognition unit, the APBA modified material and the paper base construct a fluorescence sensing platform, visual quantitative analysis of oxytetracycline in water is achieved, and the device is convenient to carry, low in detection limit, high in anti-interference performance, easy and convenient to operate and suitable for on-site rapid detection of oxytetracycline.

The utility model provides a liquid-based thin-layer cell sheet preparation clamp of a cell sheet preparation machine. The liquid-based thin-layer cell slide preparation clamp of the cell slide preparation machine comprises a clamp seat, sliding grooves I are formed in the inner walls of the front side and the rear side of the clamp seat, and the liquid-based thin-layer cell slide preparation clamp is characterized in that a sliding groove II is formed in the outer wall of the front end of the clamp seat, the sliding grooves I are communicated with the sliding groove II, and sliding strips are slidably connected to the inner walls of the two sliding grooves I; and a mounting plate is mounted between the two sets of sliding strips, a sliding block is mounted on the outer wall of one set of sliding strips, the sliding block is slidably connected with the second sliding groove, and a mounting groove is formed in the center of the top of the mounting plate. According to the liquid-based thin-layer cell slide preparation clamp of the cell slide preparation machine, through interaction of the round block, the limiting rod, the second round rod, the strip-shaped block, the second rectangular groove, the mounting plate, the fourth groove and the like, the mounting plate provided with filter paper, a gasket and a glass slide can be quickly and stably connected with the clamp seat, stable mounting is achieved, and meanwhile dismounting is convenient.

The utility model relates to the technical field of air filter elements, and provides an air filter element for a heavy-duty vehicle, which comprises a shell with a storage cavity and filter paper arranged in the storage cavity, the filter paper is folded to form the air filter element, the shell is provided with an air inlet hole, a first air outlet hole and a second air outlet hole, and one end of a fold of the filter paper corresponds to the air inlet hole. The second air outlet holes and the first air outlet holes are in a regular polygon shape, the second air outlet holes are evenly distributed in the side face of the shell, and the first air outlet holes are evenly distributed in the bottom of the shell. By means of the technical scheme, the problems that in the prior art, an air filter element is low in filtering efficiency and insufficient in ventilation capacity are solved.

The utility model discloses a filter element for a motorcycle air filter, which belongs to the field of motorcycle air filters and comprises a first filter component and a second filter component, the first filter component comprises a mounting shell, a mounting groove is arranged on the surface of the mounting shell, and a first filter screen is arranged in the mounting groove. The second filter assembly comprises a first frame body and a second frame body which are mounted on the surface of the mounting shell, filter cotton is mounted in the first frame body and the second frame body, filter paper is arranged on one side of the filter cotton, and a second filter screen is arranged on one side of the filter paper; according to the air filter element structure, the first filter assembly is matched with the second filter assembly, so that the air filter has multiple filtering operations on air, the practicability of the filter element structure is remarkably enhanced, meanwhile, all parts are convenient to disassemble and assemble through mutual matching of the structures, and the disassembly and assembly use convenience of the filter element can be improved.

The invention discloses a high-precision numerical control lathe with an intelligent chip removal function and a control method of the high-precision numerical control lathe, and relates to the field of numerical control lathes. The high-precision numerical control lathe comprises a lathe body, a turning unit and a cutting fluid circulating unit; at the moment, the output power of the liquid supply pump is automatically adjusted, and the opening degree of the throttling electromagnetic valve is automatically matched, so that the digital display of the pressure gauge is in a preset interval, the constant-pressure variable-flow control of the vortex separator is realized, the separation effect and the equipment safety are ensured, and the paper feeding speed of the paper tape filter is actively adjusted along with the change of the reflux quantity of the cutting liquid; waste caused by too high paper moving speed is avoided, blockage caused by too slow paper moving is also avoided, filter paper is reasonably and efficiently utilized, self-adaptive adjustment of the cutting fluid system is achieved, cutting fluid supply is guaranteed, stable and continuous operation of the whole cutting fluid system is guaranteed, and negative effects caused by shutdown are avoided.

The invention belongs to the technical field of drug-loaded release, and particularly relates to a Co-MOFs modified carboxymethylated filter paper composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: performing carboxymethylation treatment on filter paper to obtain carboxymethylated filter paper; soaking the carboxymethylated filter paper in a cobalt ion solution; and then adding an organic ligand solution to obtain the Co-MOFs modified carboxymethylated filter paper composite material. The preparation method has the advantages of mild reaction conditions and simplicity in operation; the Co-MOFs modified drug-loaded paper has good antibacterial performance and drug slow release performance, can be used as a medical dressing for promoting wound healing, and has important application value.

The invention provides a paper-based SERS (Surface Enhanced Raman Scattering) substrate based on ultrahigh-activity silver nanowires as well as a preparation method and application of the paper-based SERS substrate, and belongs to the technical field of surface enhanced Raman spectrum detection. Silver nanowires which are arranged in order are fixed on the surface of hydrophobic filter paper to regulate and control gaps of the silver nanowires so as to enhance the local electromagnetic field coupling effect, target molecules are induced to be enriched in situ by utilizing the hydrophobic characteristic of the hydrophobic filter paper, and a high-density Au / Ag heterogeneous interface is constructed on the surface of the etched silver nanowires in combination with aqua regia etching and AuNPs self-assembly technologies. The SERS signal intensity is further improved through the synergistic effect of bimetallic plasma resonance, the repeatability of the substrate is improved through neat arrangement of the silver nanowires, the stability is improved by wrapping the silver nanowires with the gold nanoparticles, the detection sensitivity of the paper-based SERS substrate is further improved, and the paper-based SERS substrate is low in preparation raw material price, can be manufactured in a large scale and is suitable for industrial production. The trace substances are very convenient to detect and can be taken at any time when being used.

The utility model provides a cooling device for processing a transmission part of an electric vehicle, which comprises a cooling box, one side of the cooling box is fixedly connected with a purification box, the inner wall of the purification box is fixedly connected with a rough filtration chute block, the inner part of the rough filtration chute block is slidably connected with a rough effect non-woven fabric plate, and the rough effect non-woven fabric plate is fixedly connected with the purification box. The cooling device comprises a purification box, the inner wall of the purification box is fixedly connected with a medium filtering sliding groove block, the interior of the medium filtering sliding groove block is slidably connected with an activated carbon fiber board, and the inner wall of the purification box is fixedly connected with a fine filtering sliding groove block. A multi-stage air purification system is formed by the purification box connected with the purification box, the coarse filtration sliding groove block, the coarse-effect non-woven fabric plate, the medium filtration sliding groove block, the activated carbon fiber plate, the fine filtration sliding groove block and the efficient filter paper plate, and steam containing harmful substances and formed by evaporation of high-temperature cooling liquid generated in the machining process can be effectively filtered.

The invention relates to the technical field of equipment for automobile part machining, and discloses an automobile air conditioner filter element periphery welt fitting machine which comprises an opposite side welt fitting mechanism, an opposite side welt fitting mechanism, an opposite side welt fitting mechanism, an opposite side welt fitting mechanism, an opposite side welt fitting mechanism and an opposite side welt fitting mechanism, and the opposite side welt fitting mechanism comprises a hot melt glue machine, a roll material placing mechanism, a pre-slitting mechanism, a feeding and gluing cutter mechanism and a welt fitting mechanism; a pair of edge aligning and welting mechanisms are arranged on the front side and the rear side of the turntable rotating mechanism in a mirror image manner, and welting processing of four edges of a filter paper product can be completed by matching with the turntable rotating mechanism; the turntable rotating mechanism comprises clamps, a plurality of filter paper product clamps which are uniformly arranged in the circumferential direction are mounted on the periphery of the turntable rotating mechanism, and filter paper products are clamped and positioned in the clamps; all the parts except the hot melt glue machine are fixedly arranged on the welding rack. Compared with the prior art, the automatic welting device has the advantages that by optimizing the structural design, efficient and accurate automatic welting operation is achieved, and the problems of low efficiency and poor accuracy in the prior art are solved.

The utility model relates to the technical field of filter paper, and discloses an automatic filter paper breaking mechanism for a filter element, which comprises a base, the top of the base is fixedly connected with a fixing frame, the top of the fixing frame is provided with a dust collection component, and the top of the base is fixedly connected with a support frame. The automatic filter paper breaking mechanism for the filter element is provided with the fixing box, a dust suction pipe, an exhaust fan, a positioning groove, a dustproof net, a sliding groove and a collecting box, dust generated by cutting can be sucked into the fixing box through the dust suction pipe under the action of the exhaust fan, and the dust can be intercepted through the dustproof net and cannot be discharged through the exhaust fan; and dust left in the fixing box can fall into the collecting box to be collected, the collecting box can slide out through a sliding groove to clean the dust, the effect of collecting and cleaning the dust left during cutting is achieved, workers do not need to sweep the dust afterwards, the practicability of the breaking mechanism is improved, and the workshop environment is improved.

The utility model discloses a kind of grinding fluid filtering devices and grinding machines, belong to grinding fluid filtering technical field, grinding fluid filtering device includes the cabinet for containing grinding fluid and the conveyor belt being set on cabinet, further include being set on cabinet: sedimentation tank, located above conveyor belt, sedimentation tank includes first liquid inlet pipe and baffle, baffle is set in sedimentation tank, and through hole is opened in sedimentation tank bottom;Paper reel box, located at one end of conveyor belt, filter paper is arranged in paper reel box, filter paper is wound and set in paper reel box, and the end of filter paper is located on conveyor belt, and conveyor belt is conveyed to filter paper below sedimentation tank;Fine filter, located at the side of paper reel box away from sedimentation tank, fine filter includes filter core and liquid outlet pipe, filter core is set in fine filter interior, and liquid outlet pipe is used to discharge grinding fluid that filtering is completed from cabinet. The present application improves the cleanliness of grinding fluid by the way of multistage filtration, thereby improves the grinding quality of workpiece.

This application relates to the field of texturing machines and discloses a texturing machine oil circulation device, including a base plate. An oil return tank is fixedly connected to the upper end of the base plate via a vertical rod. An oil return port is fixedly connected to the periphery of the oil return tank. A hopper is fixedly connected to the bottom of the oil return tank, and a discharge pipe is fixedly connected to the bottom of the hopper. A solenoid valve is installed inside the discharge pipe, and a collection box is threaded to the bottom end of the discharge pipe. A filter box is provided at the upper end of the base plate, and a bend is provided at the upper end of the filter box. The bend is fixedly connected to the oil return tank. The filter box includes a box body, glass fiber filter paper, a sintered metal filter element, and a sealing plate. The box body is fixedly connected to the upper end of the base plate via a second vertical rod and is fixedly connected to the bend. This application has the following advantages and effects: coarse and fine filtration of lubricating oil can be performed through the filter screen and filter box; and larger impurities filtered out by the filter screen can be easily cleaned through the solenoid valve and collection box.

Natural turmeric and hibiscus inks were developed for use on fabrics and writing surfaces. Ethanolic extracts of turmeric and hibiscus were obtained and formulated with environmentally friendly mordants such as ferrous sulfate, ascorbic acid, and apple cider vinegar, and thickeners such as linseed oil and aloe vera. These treatments were tested on fabric, filter paper, and notebook paper. Color and color loss were evaluated using the Paint program when exposed to sunlight and washing (in the case of fabric), comparing the RGB and Hex pixel values ​​obtained before and after sun exposure and washing. The degree of similarity was assessed using a digital Color Matcher Tool with the Hex and RGB data. Once the best treatment with the aforementioned mordants was determined, the ink formulation was developed using thickeners such as gelatin, alginate, cornstarch, and honey.It has a pleasing color and good consistency for use on fabric and paper. It's possible to create inks for writing and dyeing fabrics with readily available ingredients, thus contributing to environmental protection.

The utility model relates to the technical field of oil fume filtering equipment, and provides an oil fume filtering and discharging device which comprises a shell, a filtering cavity is formed in the shell, the filtering cavity is provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated with the outside of the shell, and the air inlet faces an oil fume generating position of a kitchen; the first filter paper is obliquely arranged in the filter cavity and located between the air inlet and the air outlet, and the first filter paper is used for filtering water vapor in the lampblack; the bracket is arranged in the filtering cavity, keeps in contact with the first filter paper and is used for supporting the first filter paper; the second filter paper is obliquely arranged in the filter cavity, is positioned between the bracket and the air outlet, and is used for filtering particulate matters in the oil smoke; the first fan is arranged in the filtering cavity and used for forming airflow in the shell. By means of the technical scheme, the problem that in an existing oil fume filtering and discharging device, the filtering effect on oil fume cannot meet the requirement due to the fact that filter paper adsorbs water vapor and deforms is solved.

The invention discloses a full-automatic gas-state and aerosol-state iodine combined measurement device and a measurement method. A sampling measurement module, a storage module, a recovery module and a three-axis movement mechanism are integrated in a case; the horizontally arranged sampling and measuring module comprises an aerosol-state iodine sampling and measuring cavity and a gaseous iodine sampling and measuring cavity which are arranged side by side, and the aerosol-state iodine sampling and measuring cavity is used for accommodating and sealing a filter paper sheet and is provided with an aerosol-state iodine monitoring unit gas inlet and an aerosol-state iodine monitoring unit gas outlet; the gaseous iodine sampling and measuring cavity is used for accommodating and sealing an iodine box and is provided with a gaseous iodine monitoring unit gas inlet and a gaseous iodine monitoring unit gas outlet. Synchronous, rapid and online combined continuous measurement of gaseous iodine and aerosol-state iodine at the same sampling point is realized, the accuracy of a measurement result can be improved, sampling and measurement can be performed synchronously, rapid measurement of an instrument is realized, and richer nuclide type information can be obtained.

The application discloses an aggregation-induced emission metal organic framework, a preparation method thereof and fluorescent / colorimetric dual-mode intelligent detection for trace HCl. 2+ The aggregation-induced emission metal organic framework is prepared by providing Zn(NO3)3.6H2O as Zn 2+ , imidazole-2-formaldehyde and an AIE molecule HDBB as organic ligands, and through a solvothermal method to obtain ZIF-90-HDBB, which can change the aggregation state fluorescence from yellow green to orange red after being contacted with HCl gas; the ZIF-90-HDBB is uniformly loaded on cellulose filter paper to obtain a paper-based sensor for portable detection of HCl, and through combination with a color recognition APP of a smart phone, the HCl can be rapidly and sensitively detected on site in a fluorescent / colorimetric dual mode. Since the HDBB molecule is prone to protonation under acidic conditions, the fluorescence color changes, and therefore the material can be accurately and efficiently used for detection of acidic gas, and the material can be recycled.

The present utility model mainly relates to the technical field of coffee brewer devices. Disclosed is a portable coffee brewer device structure, comprising a cup body, a filter cup, and an upper cover which are sequentially arranged from bottom to top. The upper end and the lower end of the filter cup are both open; the bottom end of the filter cup is threadedly connected to the cup body, and the top end of the filter cup is threadedly connected to the upper cover; the outer diameter of the filter cup gradually decreases from top to bottom, and a conical space for placing a filter paper is provided inside the filter cup; the outer diameter of the top of the filter cup is smaller than the inner diameter of a top opening of the cup body, and the outer diameter of the bottom of the filter cup is larger than the inner diameter of the top opening of the cup body; when the filter cup is detached from the cup body, the filter cup can be inserted upside down into the cup body. The present utility model solves the problem of the inconvenience of carrying and using a plurality of brewer devices when coffee brewing is needed in several different scenarios, such as outings.

The utility model belongs to aluminum foil production technical field especially relates to a kind of rolling oil filtering device, including the filter paper unwinding assembly, filter assembly and filter paper winding assembly that are sequentially arranged, filter paper roll is stored on filter paper unwinding assembly, and it is wound in filter paper winding assembly by passing through filter assembly, filter paper winding assembly includes cabinet, recycling box, the side of cabinet close to filter assembly is provided with several support rollers, the side of cabinet away from filter assembly is provided with several guide rollers, the lower of guide roller is provided with winding shaft;The recycling box is set at the bottom side of cabinet, and the recycling box is set below guide roller.Utilize guide roller to realize the direction change of filter paper, and then drive filter paper and diatomite on filter paper to realize efficient separation, can quickly realize the replacement of filter paper, realize the classification recovery of filter paper and diatomite, improve recovery efficiency.

The present application relates to the field of particulate matter sampling, and discloses a comprehensive sampling device for ambient air particulate matter, which comprises an information collector, a support fixedly installed at the bottom of the information collector, a storage box arranged at the side of the information collector, a tank storage block fixedly installed at the top of the storage box, a first sampling head connected to the top of the information collector, a second sampling head connected to the top of the first sampling head, a taking-out device arranged on the first sampling head and the second sampling head, and a sampling cover fixedly installed at the top of the second sampling head; the unused filter paper mounting piece is installed in the inside of the isolation piece through the placing piece, the filter paper mounting piece inside the second sampling head can be replaced when the second sampling head is blocked or the filter paper mounting piece is full, the problem that the collected particles may be shaken off when the filter paper mounting piece is taken out is reduced, the possible error in detection is reduced, and the convenience and accuracy of sample collection are improved.

1. Name of the product in this design: Coffee filter paper (02). 2. Intended use of this design: for coffee filter paper. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.