37results about How to "Overcoming the fatal flaw" patented technology

This invention discloses a carbon crystal material and a method for preparing plates with the crystals, in which, the carbon crystal material is prepared by taking carbon fibers as the raw material to be grinded and modified, the plate is a panel heater prepared by mixing carbon crystal material with paper pulp and adding viscosity aid to be heated and pressed and is harmonic with concrete, which can be used as a heat collecting product.

The invention discloses a graphene field effect transistor, and belongs to the technical field of electronics and graphene. A basic structure of the graphene field effect transistor comprises a grid, a source, a drain, an insulation layer and an active layer, wherein the active layer is formed by compositing single-layer or multi-layer graphene with the insulator or semiconductor characteristic after passivation and other semiconductor materials. The graphene field effect transistor successfully overcomes the fatal defects of the existing graphene field effect tube, has the higher performance compared with the conventional semiconductor field effect tube, and can promote an application of the graphene in the technical field of the electronics.

A constant angular speed and synchro-positioning mechanical stepless gear with low paired and high gearing ratio is designed as infinitely gear with equally regular characteristics on theories of constant angular speed and synchro-positioning movement and constant angular speed and iso-directional and reversal speed regulation so as to dissolve the vital problem of traditional impulsive stepless gear. No weakness in the whole driving chain has equal bearing capacity and high load and shock resistance. The spatial structural series is flexible and can have driving shaft in all the directions. Its advantages include reasonable structure, easy operation, accurate and stability, and economical efficiency. Its main gearing system works at low-paired transmission, with high loading ability and outputs torque at low speed.

The invention discloses a horizontal multi-stage thermal parallel thermoelectric conversion pile, which comprises a plurality of thermoelectric conversion units and heat-conducting electric insulating layers, wherein each thermoelectric conversion unit consists of an N-type thermoelectric semiconductor, a P-type thermoelectric semiconductor and a metal sheet; the heat-conducting electric insulating layers are positioned between adjacent thermoelectric conversion units; and the working ends of every two adjacent thermoelectric conversion units are overlapped and connected with each other through one heat-conducting electric insulating layer. During refrigerating, the thermoelectric conversion pile can obtain higher refrigerating efficiency while producing high refrigerating amount; and moreover, hot reflux can be reduced by using the thermoelectric semiconductors with flaky structures. During power generation, thermoelectric conversion can be performed to the maximum extent by using accumulated different-temperature galvanic piles stacked on the same pole under the condition of limited heat exchange surface. Meanwhile, the hot outflow of the thermoelectric semiconductors with flaky structures is smaller, and more electric energy can be generated under the condition of the same temperature difference compared with the conventional thermoelectric pile.

The present invention provides a SO 2 The processing method of absorption conversion, the method is based on Fe 3+ Aqueous sulfuric acid solution as absorbent, Fe 3+ As an oxidizing agent, the SO 2 Absorb dissolved in sulfuric acid aqueous solution, absorb dissolved SO 2 with Fe 3+ The reaction converts to H 2 SO 4 , while Fe 3+ is reduced to Fe 2+ ; The obtained Fe 2+ Aqueous sulfuric acid can convert Fe 2+ Oxidation regeneration to Fe 3+ Afterwards, it can be recycled as an absorbent, or to remove Fe 2+ Preparation of sulfuric acid products. The present invention uses Fe 3+ is the oxidizing agent, SO 2 The absorption and conversion of SO 2 The removal efficiency is high, the conversion is thorough, and the operating conditions are mild. While realizing wet desulfurization, sulfuric acid can be co-produced, and through Fe 3+ / Fe 2+ The pair realizes Fe 3+ cyclic use; the utilization rate of atoms is high, the process is safe and reliable, and it is conducive to large-scale industrialization. is a SO 2 An effective method for removal and recycling of resources.

The invention discloses a method for desulfurization cogenerating of hydrogen and sulfuric acid. The method includes three main steps, namely SO2 absorption and conversion, Fe3+regeneration and H2 cogeneration and F2+removal and H2 cogeneration. In the method, a Fe3+ / F2+ electrochemical pair is adopted as a process catalyst, indirect electrochemical oxidation is realized, sulfur dioxide in a gas phase is removed by using a sulfuric acid water solution wet method, and hydrogen and sulfuric acid can be cogenerated at the same time. The method is high in process efficiency and energy utilization rate, low in equipment investment and production cost, safe and reliable in process and conducive to large-scale industrialization, and is an environment-friendly technology for desulfurization, comprehensive utilization of sulfur dioxide and cogeneration of hydrogen and sulfuric acid.

Manufacturing method of double-chain nucleic acid on surface of solid supporter is a distinctive method of manufacturing double-chain nucleic acid on solid supporter is basic molecule biology field and biomedicine field, the invention uses this method to manufacture solid supporter which connecting double-chain nucleic acid. The manufacturing method includes: (a) two single-chain few ribotide segments are chemical synthesized, one is universal single-chain few ribotide segment, the other is probe single-chain few ribotide segment, (b) in liquid reaction system the universal single-chain few ribotide segment and probe single-chain few ribotide are compounded in quality and carry on connecting enzyme connecting reaction, (c) single-molecular nucleic acid specimen is sampled onto the solid supporter's surface polished by aldehyde radicel.

The invention relates to a computer application examination system. The computer application examination system comprises an FTP server and a client, wherein the FTP server and the client are connected with a local area network. The FTP server is used for storing examinee information, question banks and answer information submitted by the client, and being in data communication with the client in response to requests of the client. The client comprises a data downloading module, a data uploading module, an interface generating module and a data processing module. An examination operation interface comprises operating skill examination questions and screenshot storage function buttons. By means of the computer application examination system, operation questions and reading and appraising means of operation answers are provided, the requirement for testing of all knowledge and skills of a computer basis is satisfied, the capability of independent innovation of an examinee can be detected, and the defects of existing full-automatic grading examination software are overcome. Development cost is low, and the workload of maintenance is small. The computer application examination system is worthy of popularization and application in the secondary vocational education computer application ability examination field.

The invention discloses a single-live-wire intelligent control apparatus for an LED lamp. The single-live-wire intelligent control apparatus comprises an LED lamp half-wave driving apparatus, and a single-live-wire control circuit and a control output circuit that are connected in series with the same alternating current circuit, or comprises the LED lamp half-wave driving apparatus, and a single-live-wire control output circuit connected in series with the same alternating current circuit. According to the single-live-wire intelligent control apparatus, the wide-range input voltage characteristic of the LED lamp is fully utilized; a diode half-wave power supply and series connection control technology is adopted, so that the high-current and single-live-wire intelligent control for the LED lamp is realized; the shortcomings of the common current-leakage type single-live-wire lamplight controller are completely overcome; and the single-live-wire intelligent control apparatus is simple, reliable and low in cost, and is high in application values in smart home and intelligent lighting control.

The invention discloses a protective sleeve of a buried-type medium-voltage power cable which includes a protective sleeve and a threaded pipe. The protective sleeve and the threaded pipe are integrally connected. The material of the protective sleeve and the threaded pipe is a hard polyvinyl chloride. A reinforcement layer is arranged on the surface of the protective sleeve. Two faces of the reinforcement layer are connected with an inflaming retarding layer and a wear resistant layer respectively. Through the above-mentioned method, the protective sleeve of the buried-type medium-voltage power cable undergoes high-temperature extrusion and sizing through a plastic extruder and has the properties of being corrosion resistant, high in strength and high-temperature resistant and can withstand voltages below 2000V and overcomes critical defects of asbestos cement pipes and is mainly used for pipe laying for power cables of 26 / 35 kV and below.

The invention relates to an idling resistant plastic magnetic pump. The idling resistant plastic magnetic pump comprises a plastic pump shell (3) which is divided into a front pump shell (1) and a rear pump shell (2); and the inside of the plastic pump shell forms an impeller chamber (9) and a driven magnet chamber (10) adjacent to the impeller chamber (9), and is provided with an inlet (11) and an outlet (12) which are used for providing the transportation for target liquid. A discal impeller driven magnet sleeve set (7) consists of a front-end discal impeller (4) and a rear-end magnet sleeve (6); the magnet sleeve (6) is provided with a driven magnet (5) inside. The discal impeller driven magnet sleeve set (7) is arranged inside the impeller chamber (9) and the driven magnet chamber (10) adjacent to the impeller chamber (9) formed in the inside the pump shell (3). The discal impeller driven magnet sleeve set (7) is rotatably supported by a full sealed type ceramic rolling bearing (8) which is matched with the front pump shell (1) and the rear pump shell (2). A main rotary magnet (15) is combined with the driven magnet (5) by the rear pump shell (2) through the action of a magnetic filed so as to apply driving force to the discal impeller (4) by the driven magnet (5). The inside of the discal impeller (4) forms a flow passage so as to input target liquid from the inlet (11); therefore, the target liquid is transported outside along the radial direction and exhausted from the outlet (12).

The invention relates to a method for manufacturing a flat-plate fluorescent lamp, comprising two fluorescent lamp glass plates, wherein a plurality of separable fluorescent lamp discharge channels and an electrode are arranged between two glass plates; a ring of sealant is arranged on at least one glass plate corresponding to the periphery of each fluorescent lamp; the peripheries of the two glass plates are firstly adhered so as to be sealed to form a cavity body; the cavity is vacuumized to form a vacuum environment; a gas discharge medium is injected into the vacuum environment; and in the vacuum environment, the sealant on the periphery of each fluorescent lamp is heated and molten, and each fluorescent lamp on the glass plate is cut and separated so that the plurality of flat-plate fluorescent lamps are obtained. Through the method for manufacturing the flat-plate fluorescent lamp, more fluorescent lamps are produced once, the production cost is reduced, materials are saved, the production efficiency is greatly improved, and the yield is increased.

The invention discloses a low-gloss halogen-free flame-retardant alloy material and a preparation method thereof, and belongs to the technical field of high polymer materials. The low-gloss halogen-free flame-retardant alloy material is prepared from the following raw materials in parts by weight: 50-90 parts of polypropylene resin, 10-30 parts of polycarbonate resin, 6-12 parts of a compound flame retardant and 0.3-0.6 part of a lubricant. When the compound flame retardant is formed by compounding a nitrogen flame retardant, a hypophosphite flame retardant, a phosphate flame retardant and a flame retardant synergist, the mass ratio of the nitrogen flame retardant to the hypophosphite flame retardant to the flame retardant synergist to the phosphate flame retardant is (30-60: 15-30): (0.5-1.5: 0-20). The low-gloss halogen-free flame-retardant alloy material prepared from the compound flame retardant disclosed by the invention has good flame retardancy, mechanical properties and low gloss, and can be used for preparing a table lamp key shell; and the preparation method is simple and suitable for industrial production.

The invention discloses an antibiotic polypropylene resin composition. The antibiotic polypropylene resin composition comprises a polypropylene resin and additives, and a weight ratio of the polypropylene resin to the additives is 1000:3.5-4.23; the additives comprise a composite antiseptic, a lubricant and an antioxidant, a weight ratio of the antiseptic to the lubricant to the antioxidant is 1:(1.43-1.56):(1.07-1.67), and the composite antiseptic is composed of pyrithionc zinc and 2,4,4'-trichloro-2'-hydroxydiphenyl ether according to a weight ratio of 1:0.125-0.27. The invention also discloses a preparation method of the antibiotic polypropylene resin composition. The antibiotic polypropylene resin composition has the characteristics of good antibiosis rate, broad antibiosis spectrum, lasting antibiosis, use safety, superior physical and mechanical performances, high cost performance and the like, and has a good economic benefit.

The invention discloses a novel LED heat dissipating lamp shell for daily lighting and a production method thereof. The novel LED heat dissipating lamp shell comprises a plastic lamp shell, and the inner surface of the plastic lamp shell is coated with a carbon-based heat-conduction material layer. A carbon-based heat-conduction material of the carbon-based heat-conduction material layer is prepared through the following steps that a heat-conduction material, water and a substance A are taken and mixed to be added into a container to be mixed and stirred, and evenly-mixed viscous mixed liquidis obtained; and part of a solvent in the viscous mixed liquid is removed to enable the viscosity range to be within 1-5000 cP, and then the carbon-based heat-conduction material is obtained. According to the novel LED heat dissipating lamp shell, heat of a luminous LED chip can be effectively and rapidly transmitted to the whole plastic surface to achieve the extremely good heat dissipating effect so that an internally-arranged aluminum cup heat dissipating structure of a traditional LED lamp shell can be completely substituted, the cost is greatly reduced, and the unavoidable difficult problems of cracking of outer-layer plastics and the like which are caused by the thermal expansion coefficient difference between an inner-layer aluminum cup and the outer-layer plastics are solved.

The invention belongs to a floor drain for indoor floor drainage. The center of a water storage trough 4 is provided with a water outlet 1, a water return bowl 3 has a dwarf box shape and is made of silica gel, the bottom end of a skirt part of the water return bowl 3 makes direct contact with the bottom plane of the water storage trough 4 to form a closing surface, the top plane of the water return bowl 3 can be attached to a grate 5, the skirt part of the water return bowl 3 is of a sheet structure which can be folded and bent inwards under drainage pressure, and drainage holes 9 of the grate 5 are formed in the edge of the water storage trough 4. The interior of the water storage trough 4 is provided with supporting columns 10 for supporting the grate 5. The top surface of the flat-topwater return bowl 3 is provided with a gas buffer device. According to the water-sealed floor drain of the structure, the water return bowl does not block drainage and can achieve closing for sealing,stored water is not liable to be lost, and closing does not fail without water.

The invention discloses an environment coordination type preparation method of nano titanium dioxide powder, which comprises the steps of: by using green resource water as a single solvent, one of tetrabutyl titanate, titanium dioxide, titanyl sulfate, metatitanic acid, titanium sulfate and titanium tetrachloride as a titanium source, ammonia water or urea as a neutralizing agent, and ammonium nitrate as a combustion improver, introducing the ammonium nitrate by adopting the ammonia water and nitric acid or singly adding the ammonium nitrate, using lactic acid as a stabilizing agent, a chelating agent, a swelling agent and a pore-forming agent, preparing sol at room temperature by adopting a water-based sol-gel method, regulating the pH value by the sol, obtaining cream yellow opaque gel after the solvent is removed, spontaneously igniting, swelling and pore-forming the gel to obtain a nano pyrophorus, and thermally treating the pyrophorus for 0.5-1h at the temperature of 500-800 DEG C to prepare the nano titanium dioxide powder with different crystal phase structures. The prepared nano titanium dioxide powder has the advantages of no agglomeration, porous nano thin layer, uniform pore distribution, uniformity in pores and larger specific surface area.

The present invention relates to the field of metal ball type explosion-proof container manufacture technology, and belongs to a manufacture technique of ball type explosion-proof container formed by using thin-sheet multi-layer metal material and adopting mouldless explosion process. The production cost of the multi-layer metal ball type explosion-proof container produced by adopting said invention only is 1 / 50 of that of single-layer metal ball type explosion-proof container made up by traditional technique, and its production period is 1 / 100 of that of single-layer metal ball type explosion-proof container, and its protective performance also is greatly superior to existent other explosion-proof materials.

The invention relates to a bearing, in particular to a multi-roller layer (multi-ferrule bearing) bearing. The ball bladder multi-ferrule bearing with a reducing middle-layer ferrule comprises a ball bladder type outer ferrule, a reducing middle-layer ferrule, an inner ferrule, an inner rolling body and outer rolling bodies, wherein the upper end and the lower end of the axial lead of the ball bladder type outer ferrule are respectively provided with a shaft mounting hole; at least two rows of outer rolling bodies bear axial force; the inner rail of the ball bladder type outer ferrule is a round ball bladder inner rail; and the diameter of the axial force bearing end of the ball bladder inner rail is small. Meanwhile, the ball bladder multi-ferrule bearing which combines a tip bearing of the axial double-row rolling bodies and a self-aligning bearing of the radial three-row rolling bodies is formed by absorbing and developing the self-aligning action and the low-friction efficacy of the tip bearing and the self-aligning bearing. The ball bladder multi-ferrule bearing with the reducing middle-layer ferrule not only has the characteristics of extremely low friction and low abrasion but also has the self-aligning action and extremely low frictional resistance of the tip bearing and the self-aligning bearing. According to the ball bladder multi-ferrule bearing disclosed by the invention, the fatal defect of the low axial bearing force of the tip bearing and the self-aligning bearing is overcome, so that the self-aligning, low frictional resistance and low abrasion of the bearing are realized, and axial and radial bearing forces are greatly improved.

The invention discloses a forward-flyback switching power supply circuit, which is applied to a boosting occasion in which the output voltage is far higher than the input voltage, and the output voltage can be adjusted. The controllable switching device serves as a control switch, when output short circuit occurs or output voltage is low, the controllable switching device is controlled to be switched off, the whole circuit works in a flyback state, and short circuit power consumption and output efficiency are greatly reduced; when the output voltage is high, the switching tube is controlled tobe switched on, so that the whole circuit works in a forward-flyback state, the voltage stress of the power tube of the whole circuit is reduced, device type selection is facilitated, and the overallefficiency is further improved.

The invention discloses a variable-supporting-diameter seamless forming drum. The variable-supporting-diameter seamless forming drum comprises a shaft sleeve, a guide disc, a guide key disc, a movablebase, a power mechanism, floating connecting rod bases, springs, guide rods, fixed connecting rod bases, large locking blocks, small locking blocks, sliding blocks, first connecting rods, second connecting rods, a limiting ring and a limiting ejector rod, wherein the shaft sleeve, the guide disc and the guide key disc are fixedly connected together; the power mechanism drives the movable base toslide along the shaft sleeve, and pushes the floating connecting rod bases and the fixed connecting rod bases to move synchronously; and the large locking blocks and the small locking blocks are driven by the connecting rods to move outwards in the radial direction of the guide key disc. When a sliding sleeve makes contact with the limiting ring, the sliding sleeve stops moving, the large lockingblocks stop moving accordingly, the movable base continues to push the fixed connecting rod bases to move, and the small locking blocks continue to move outwards till the small locking blocks and thelarge locking blocks jointly define a locking circle. Moreover, the position of the limiting ring can be adjusted by adjusting the limiting ejector rod, and locking circles with different diameters can be formed, so that locking of tire blanks with different seam allowance inner diameters is met.

The invention discloses a bio-fiber for cigarette filter tips and a preparation method of the bio-fiber. The bio-fiber is prepared from, by weight, 8-10 parts of canna edulis starch, 20-22 parts of cassava starch and 5-7 parts of cigarette glue. The bio-fiber for the cigarette filter tips is prepared through the steps of material mixing, material stirring and forming, adopts renewable non-grain crops as raw materials and is environmentally friendly, low in carbon and degradable, the resources are renewable, and the fatal defects of cellulose acetate (CA) with wood pulp as a raw material are overcome; the bio-fiber has great prospects under the great background of environmental protection in China and in European and American countries where environmental protection is called for and has better effects of reducing harmful components and tar compared with cellulose acetate, it is detected that the nicotine content in smoke of one cigarette is smaller than or equal to 0.85 mg (the detection value is 0.82), the tar content of one cigarette is smaller than or equal to 10 mg (the detection value is 9.8), and the carbon monoxide content of one cigarette is smaller than or equal to 7.5 mg(the detection value is 7.5), tobacco coiling and packaging machine equipment does not need to be reconstructed, the industrialized production of cellulose acetate and propylene fibers (PP) is replaced without obstacles, and the price is lower.