16results about How to "The process is simple and convenient" patented technology

The present application relates to a kind of preparation method and application of metal phthalocyanine-graphite phase carbon nitride / graphene ternary composite material, it solves the problem of poor dispersibility, easy aggregation and poor conductivity of metal phthalocyanine material as electrocatalyst.Existing Preparation method steps include: metal phthalocyanine, graphite phase carbon nitride are added to sulfuric acid, after heating stirring, solution A is prepared by cooling;Solution B is prepared by stirring after adding sodium nitrite to solution A under ice bath;Graphene oxide is ultrasonically dispersed in distilled water to prepare solution C;Solution B is added dropwise to solution C and stirred, then ascorbic acid is added and stirred, the product is centrifuged, washed and dried to prepare metal phthalocyanine-graphite phase carbon nitride / graphene ternary composite material.The ternary composite material prepared by the method is a two-dimensional sheet structure, has high dispersibility, large specific surface area, good conductivity and structural stability;The product of the present application can be used for electrocatalytic reduction of carbon dioxide.

The utility model discloses a glass fiber reinforced plastic cylinder excircle glue scraping and cleaning device, which relates to the technical field of glass fiber reinforced plastic production, and comprises a mounting rack and glass fiber reinforced plastic, the two sides of the mounting rack are symmetrically and rotatably connected with mounting discs, and the side wall of one side of the mounting rack is fixedly connected with a first motor; the output end of the first motor is fixedly connected with the side wall of one mounting disc, the glass fiber reinforced plastic is arranged between the two mounting discs, the glue scraping assembly is installed at the top end of the mounting frame and used for evenly scraping glue on the outer circle of the glass fiber reinforced plastic, and the auxiliary cleaning assemblies are installed on the two sides of the glue scraping assembly and used for cleaning the outer circle of the glass fiber reinforced plastic. The blowing device is used for blowing away chippings or fiber dust generated during glue scraping and reducing adhesion; in the axial winding process of the glass fiber reinforced plastic, the glue scraping box reciprocates left and right along the outer ring wall of the glue scraping box, uniform glue scraping is continuously carried out, compared with manual glue scraping, the process is simpler and more convenient, and the product quality is guaranteed.

The application discloses a model-driven neural network-based offset min-sum LDPC code decoding algorithm and relates to an offset min-sum LDPC code decoding algorithm. The application is designed to solve the problems of the traditional LDPC decoding algorithm in convergence speed, calculation complexity, flexibility and the like. The application comprises the following steps: 1, a model-driven offset min-sum algorithm network model is constructed, wherein the network model comprises an input layer, a check node layer, a variable node layer and an output layer; 2, the input layer is used to calculate the received channel LLR by using a received signal y to perform initialization; 3, the check node layer is used to calculate the CN-to-VN LLR value; 4, the variable node layer is used to calculate the VN-to-CN LLR value; and 5, the output layer is used to calculate a final decoding output. The application belongs to the technical field of decoding.

A kind of preparation method of super copper / carbon nanotube composite material, by the treatment of strong oxidant potassium permanganate and hydrogen peroxide, carbon nanotube is oxidized and peeled off, and high-dispersity oxidized and peeled off carbon nanotube aqueous solution is obtained, copper, the precursor of oxidized and peeled off carbon nanotube composite material is co-deposited using pulse electrodeposition method, and super copper / carbon nanotube composite material is obtained by annealing-rolling-annealing treatment.Oxidized and peeled off carbon nanotube is inserted in copper matrix, and uniform distribution is realized.In addition, pulse electrodeposition process and annealing treatment can effectively reduce the oxygen content of composite material and optimize material structure.Therefore, the super copper / carbon nanotube composite material of the present application is superior to the characteristics of pure copper in electricity, heat and mechanics, and the preparation method is simple and easy to operate, and has good and wide application prospect in the field of electronic power, energy and other related fields.

The utility model discloses a photoresist spin coating cleaning device. Comprising a spin-coating unit for coating a substrate with glue, a workbench is arranged under the spin-coating unit, a bearing unit for driving the substrate to ascend, descend and rotate is installed on the upper surface of the workbench, a baffle formed by enclosing is arranged on the periphery of the bearing unit, and the baffle is fixedly connected with the upper surface of the workbench and forms a dissolving tank with an upward opening. A dissolving solution for dissolving residual glue on the side wall of the substrate is injected into the dissolving tank, the bottom of the dissolving tank is communicated with an activated carbon adsorption column, one end of the activated carbon adsorption column is communicated with a circulating unit, and the liquid outlet end of the circulating unit is aligned with the substrate, so that the treated dissolving solution secondarily cleans the substrate. The photoresist spin-coating cleaning device solves the technical problem that the photoresist remains on the side surface of the substrate after spin-coating and is difficult to clean.

This application discloses a dry connection structure for a prefabricated double-sided composite shear wall and a prefabricated beam, including a double-sided composite shear wall, a prefabricated beam, and multiple fasteners. The double-sided composite shear wall has a slot extending along its thickness direction. A beam end connector is provided at the end of the prefabricated beam, which is inserted into the slot. The beam end connector has multiple mating plates, each located in a different plane and conforming to the inner wall of the slot, forming an operating cavity between the mating plates. Each fastener passes through the corresponding mating plate from one side of the operating cavity and connects to the double-sided composite shear wall. The dry connection structure for the prefabricated double-sided composite shear wall and prefabricated beam provided by this application simplifies the pre-connection process, eliminating the need for specialized welding technicians. The multiple mating plates of the beam end connector conform to the inner wall of the slot, providing multi-directional positioning and easily ensuring accurate pre-installation of the double-sided composite shear wall and prefabricated beam.

The present application relates to a kind of functionization outer diameter unequal thickness magnetic ring and its magnetizing method, belong to permanent magnet motor technical field, the inner diameter of unequal thickness magnetic ring is circular, and the outer diameter is change curve, wherein, the change curve of outer diameter is constant in main magnetic pole portion thickness, and the thickness is reduced in the transition position between adjacent main magnetic pole portion;The unequal thickness magnetic ring adopts bonded neodymium iron boron material.The present application is composed of a functionization outer diameter bonded neodymium iron boron magnetic ring and its matching multipole magnetizing fixture, wherein the outer diameter of magnetic ring adopts two kinds of functionization size, by reducing the thickness of magnetic pole transition area, the harmonic component of surface magnetism of magnetic ring is controlled, and the amplitude of cogging torque is reduced.The multipole magnetizing core of matching magnetizing fixture can magnetize magnetic ring into surface alternately distributed multiple magnetic poles.

The utility model provides a fixing structure for an advertisement sign, which comprises a base and two mounting seats, a mounting frame is fixedly mounted on the base, adjusting components are arranged on the two mounting seats, each adjusting component comprises a rotating gear, a bidirectional rack plate, a rack plate and a movable plate, and the rotating gear is fixedly mounted on the mounting frame. The interiors of the two mounting bases are rotationally connected with rotating shafts through bearings correspondingly, and gears are fixedly mounted on the rotating shafts. By arranging an adjusting assembly, a rotating hand wheel and limiting a bidirectional rack plate, under the cooperation of a gear, two movable plates cannot move, so that the positions of two mounting plates are fixed, a user is allowed to carry out accurate adjustment according to the size of the identification label, it is ensured that the identification label can be stably and horizontally mounted, and the working efficiency is improved. The device is simple in structure and convenient to use, can adapt to the identification labels of various sizes, reduces the requirement for replacing the device due to size mismatching, meanwhile, enables the identification labels to be easy and rapid to install and detach, saves time and labor cost, and improves working efficiency.

The utility model discloses a small -size sample grinding equipment relates to plant sample preparation technical field, and the device includes support platform: the top fixedly connected with the grinding jar of collection box is linked with its intercommunication, the top cover of grinding jar is covered with the closure, the top fixedly connected with the fixed frame of closure, the inner chamber of grinding jar is provided with grinding assembly, grinding assembly includes the rotary column of rotary connection in the inner chamber of grinding jar, the bottom fixedly connected with the grinding ball of rotary column surface, the surface of grinding ball is provided with a plurality of annular distribution's blanking groove, the inner chamber rotationally connected with drive column of fixed frame. The cooperation of servo motor, drive bevel gear and force bevel gear can be used in this application, improves the driving source, under the cooperation of grinding assembly and grinding jar, the plant frozen block is ground, and under the cooperation of collection box and blanking box, the powdered plant frozen block is collected and stored, and the purpose of easy to grind sample preparation and grinding is reached.

The utility model discloses a miniature circuit breaker convenient to maintain, which relates to the field of circuit breakers and comprises a circuit breaker main body, two wiring terminals are movably mounted in the circuit breaker main body, a fixing assembly is movably mounted on the circuit breaker main body at the same time, and the fixing assembly is composed of an insulating connecting rod, a first spring, a connecting plate, a connecting rod and a connecting latch. The number of the insulating connecting rods, the number of the first springs, the number of the connecting plates, the number of the connecting rods and the number of the connecting latches are all two, the insulating connecting rods are fixedly installed at one ends of the wiring terminals, the insulating connecting rods are sleeved with the first springs, and the fixing assembly is arranged on the circuit breaker body and connected with the two wiring terminals at the same time. When the circuit breaker body needs to be separated from the electric wires, the fixing assembly can be pushed by hands, so that the two wiring terminals are pushed to move through the fixing assembly at the same time, fixed connection between the circuit breaker body and the two electric wires is removed at the same time, the process is simple and convenient, and finally maintenance of the circuit breaker body is facilitated.

The invention discloses a steam turbine defect composite voiceprint diagnosis device, and particularly relates to the technical field of steam turbine diagnosis, the steam turbine defect composite voiceprint diagnosis device comprises a track body, a diagnosis assembly, a mounting and dismounting mechanism and a telescopic assembly; the diagnosis assembly is arranged on the track body; the diagnosis assembly comprises a moving plate, a base, a rotating arm A, a connecting arm, a rotating arm B, a fixed plate, a voiceprint detector, a vibration sensor and a camera body; the moving plate is slidably arranged on the track body through the driving assembly. The base is connected with the moving plate through the mounting and dismounting mechanism; the rotating arm A is rotationally connected with the base through a rotating motor A; the connecting arm is arranged above the rotating arm A; the rotating arm B is rotationally connected with the connecting arm through a rotating motor B; the fixed plate is arranged on one side of the rotating arm B; the voiceprint detector, the vibration sensor and the camera body are all arranged on the fixing plate; the device is reasonable in structural design, capable of achieving efficient, continuous and automatic monitoring, comprehensive in coverage and low in use cost, and the diagnosis accuracy is greatly improved.

The application provides a non-noble metal catalyst and a preparation method and a method for preparing aromatic amines by catalytic transfer hydrogenation reduction of aromatic nitro compounds, and relates to the technical fields of catalysis and organic synthesis. The non-noble metal catalyst provided by the application comprises carbon cloth and iron trioxide loaded on the carbon cloth. The application provides application of the non-noble metal catalyst in preparation of aromatic amines by catalytic transfer hydrogenation reduction of aromatic nitro compounds. The catalyst is used in preparation of aromatic amines by catalytic transfer hydrogenation reduction of aromatic nitro compounds, and high-pressure environment is not needed, the condition is mild, reduction of different aromatic nitro compound substrates can be realized, and the catalyst has the characteristics of high catalytic activity, high selectivity and recyclability. The results of examples show that when the catalyst is used in preparation of aromatic amines by catalytic transfer hydrogenation reduction of aromatic nitro compounds, the conversion rate of the aromatic nitro compounds is 85-95%, and the selectivity of the corresponding product aromatic amines is 90-98%.

The application provides a signal long-time accumulation detection method, comprising the following steps: receiving echo data, filtering and matching the received echo data, using a Fourier transform method to obtain a coherent accumulation result of each frame from the filtered and matched echo data, using a velocity interval segmentation method to correct Doppler distance of the coherent accumulation result, performing modulus superposition on the corrected Doppler distance to obtain a non-coherent accumulation result, detecting the non-coherent accumulation result, and selecting a larger non-coherent accumulation result as an output result. The signal long-time accumulation algorithm has the advantages of small calculation amount, small required cache space and the like, and is suitable for engineering application of a general detection system radar.

The invention discloses a synthetic method of 4, 4 '-dihydroxybiphenyl. The method comprises the following steps: mixing 4, 4 '-dinitrobiphenyl, a metal catalyst and an organic solvent, introducing hydrogen, and carrying out hydrogenation reduction reaction to obtain 4, 4'-diaminobiphenyl; the preparation method comprises the following steps: mixing 4, 4 '-diaminobiphenyl and a silicon dioxide grafted modified multi-branched carboxylic acid polymer, carrying out a heating reaction, and removing a solvent from a reaction solution to obtain 4, 4'-dihydroxybiphenyl. 4, 4 '-dinitrobiphenyl is used as a substrate of the reaction, and an intermediate 4, 4'-diaminobiphenyl is obtained after hydrogenation reduction; the target product 4, 4 '-dihydroxybiphenyl is synthesized by taking the silicon dioxide grafted and modified multi-branched carboxylic acid polymer as a hydrolysis reagent, so that the efficiency and selectivity of the reaction for preparing the 4, 4'-dihydroxybiphenyl are effectively improved, the reaction condition is mild, the operation process is simple and convenient, and the method has wide industrial application potential.

The utility model relates to injection device field, concretely is a device and pre -filled syringe of having anti -stab protection, the device of having anti -stab protection includes medicine storehouse shell, hidden needle cover, hidden needle connecting rod, connecting rod spring, medicine bottle support, medicine bottle gland, hidden needle limiting piece and pre -filled medicine bottle, hidden needle cover and hidden needle connecting rod connect and set up in medicine storehouse shell, the one end of hidden needle connecting rod is away from hidden needle cover and is sequentially provided with hidden needle limiting piece and medicine storehouse gland, be provided with the knob on hidden needle limiting piece, the knob drives hidden needle limiting piece rotation, limit or release hidden needle connecting rod's axial movement, hidden needle connecting rod and pre -filled medicine bottle cover set up in medicine bottle support, and connecting rod spring is arranged between hidden needle connecting rod and medicine bottle support, the fixing of hidden needle cover is realized through the clamping of hidden needle connecting rod and hidden needle limiting piece, and further avoid needle head to expose outside hidden needle cover, prevent needle head from being hurt by mistake. Reset through the device elasticity, the process is simple, and the degree of automation is high, and the user operation difficulty is low.

This invention discloses a large-scale preparation method for high-purity phycobiliproteins, belonging to the field of purification technology for active ingredients in natural products. This invention utilizes the addition of electronegative polysaccharides or oligosaccharides to form a co-soluble solution, which induces phycoerythrin precipitation under low-temperature conditions, achieving effective separation of phycoerythrin and phycocyanin and obtaining high-purity phycoerythrin. This invention, through variable-parameter aqueous two-phase continuous purification, obtains high-purity phycocyanin while effectively removing both existing and added soluble polysaccharides from the phycobiliprotein-containing solution or biomass extract, avoiding interference from the large molecular size and negative charge of polysaccharides on ultrafiltration purification performance. The prepared phycoerythrin has a PE / PC molar ratio >14, and the phycocyanin has a PC / PE molar ratio >4. Compared with traditional purification methods, this invention effectively solves the high cost and complexity of chromatographic preparation of phycobiliproteins. The method for preparing and purifying phycobiliproteins provided by this invention has the advantages of fewer purification steps, high yield, simple process, and easy scalability. Furthermore, the preparation process is green, environmentally friendly, and low-cost, facilitating industrial production and meeting market demand for high-purity phycobiliproteins, thus possessing significant promotional value.