36results 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.

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 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 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 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 relates to an air embolism prevention murphy's dropper. According to the air embolism prevention murphy's dropper, when a floating ball floats downwards to the bottom of the murphy's dropper, the outer surface of the floating ball and the inner surfaces of two cones are in simultaneous tangency, an iron ring and a liquid outlet conduit are in close fit, and a magnetic ball arranged in the floating ball and a chromium-plated iron ring are in magnetic attraction. Magnetic force provides positive pressure to the floating ball, plastic deformation will occur between the floating ball and a contact sealing surface of the two cones, air leakage resistance is increased, and then blocking and isolating are achieved. In this way, under the triple effects of air pressure, gravity and magnetic force, outer surface of the floating ball and the inner surfaces of two cones are in tangency to achieve a secondary sealing effect, and the critical defect of air embolism is avoided. The murphy's dropper is high in production operability and technical content and low in cost and has extremely high market application value.