41results about How to "Address burns" patented technology

The invention discloses a bicolor agricultural soil covering film and a preparation method thereof and relates to the field of an agricultural soil covering film, comprising at least one black mulch film and at least one white mulch film, the white mulch film is effective in increasing surface temperature so as to partially remove weeds, in case of a single-color mulch film, a color combination is changed by changes in an extrusion passage in a nose so that a color combination mode is changed, and existing single-color mulch film is finally imparted two colors and is suitable for various applications, and the film has temperature rising, humidity holding and good weeding effect, is very applicable to agriculture, and is simple to prepare, low in cost and higher in economic benefit.

The invention discloses a grinding wheel which has large contact surface and can be used for grinding, comprising a grinding wheel body and is characterized in that the outer circumference of the grinding wheel is evenly provided with a set of slots used for removing chips and dissipating heat. As the slots are arranged on a grinding surface of the grinding wheel, the grinding lengths of the grinding wheel and workpieces are simultaneously shortened, and cooling fluid flows into grinding area through the slots to cool and lubricate the grinding surface, thus solving the problem that the grinding surface is burnt, increasing the quality of the grinding surface without the reduction of grinding efficiency. The parts along the axial direction of adjacent slots are overlapped, thus the length where the grinding wheel is contacted with workpieces is even and stable grinding can be ensured. The included angel alpha formed by grinding wheel axis lines is 45-55 degrees. The relationship between include angle alpha of grinding wheel diameter D, width B, the slots and the axis lines and the number of the slots N can be described as N=(arc sin(B* tg alpha/D)).

The invention provides a high-strength high-wear-resistance valve plate and a preparation method thereof. The high-strength high-wear-resistance valve plate comprises an iron base plate, and is characterized in that a copper plating layer and a copper alloy sintered layer are sequentially formed on the iron base plate; and the copper alloy sintered layer is prepared from 0.125-0.145% of Zn, 13-15% of Pb, 5-7% of Sn, 0.4-0.6% of Fe, 0.25-0.28% of Si, 0.07-0.1% of Se, 0.007-0.009% of P, 0.0035-0.0038% of Ag, 0.004-0.006% of Cr, 0.05-0.07% of S, 0.1-0.2% of As, 0.03-0.04% of B and the like. The invention has high strength and wear resistance.

The invention relates to a preparation method of a ceramic metal composite binding agent grinding wheel. The preparation method of the ceramic metal composite binding agent grinding wheel comprises the steps that (1), a liquid ceramic binding agent is prepared, specifically, a certain proportion of Al(NO3)3, H3BO3, LiNO3 and NaNO3 is dissolved in water, and then SiO2 sol is added to obtain the liquid ceramic binding agent; (2), a ceramic metal composite binding agent is prepared, specifically, diamond micro-powder and metal mixture powder are added to the liquid ceramic binding agent and mixedwell to obtain mixture slurry; (3), spray granulation is carried out, specifically, the mixture slurry obtained from the step (2) is subjected to spray granulation to prepare a molding material; and(4), sinter molding and post-processing are carried out, specifically, the molding material obtained from the step (3) is pressed and molded, sintered, trimmed and sharp fixed to obtain the ceramic metal composite binding agent grinding wheel. According to the preparation method of the ceramic metal composite binding agent grinding wheel, the microstructure consistency of the grinding wheel is improved, the phenomena of large dents, S-shaped cutting joints, burn, unstable cutting quality, uneven consumption speed, falling off of large pieces and the like caused by the prior art are solved, andmeanwhile, the grinding wheel further has higher strength and longer service life.

The invention discloses a protecting, cooling and chip collecting device used when laser cutting an inner wall of a cylinder. The device comprises a first splicing pipe, wherein the inner wall of thetop of the left half part of the first splicing pipe is in threaded connection with a connecting pipe; the bottom of the connecting pipe communicates with the inside of the first splicing pipe; and aU-shaped box is arranged above the connecting pipe. The device has beneficial effects of being simple in structure and convenient to operate, and successfully solving a series of problems that scratch, burn, sinter and the like to the inner wall of the cylinder are caused by molten chips sprayed when the outside of the cylinder is cut by a laser; a laser cutting head can be symmetrically tracked inside the cylinder by the U-shaped box according to a cutter path of the laser cutting head, and the molten chips are collected in the U-shaped cavity after being cooled when the spraying angle of themolten chips is small, and then conveyed by a U-shaped cavity, a first connecting pipe, a corrugated pipe and a second connecting pipe into a chip collecting pipe to be temporarily stored, so that itis convenient for people to clean, and meanwhile, the damage to people caused by chip splashing is prevented.

The invention relates to an anti-scorching diffuse-scattering greenhouse film special for fruits and vegetables and a preparing method thereof, and belongs to the technical field of film manufacturing. The anti-scorching diffuse-scattering greenhouse film special for fruits and vegetables is prepared from, by mass, 24%-25.5% of LLDPE, 35%-36.5% of LDPE, 14.5%-15.5% of MLLDPE2010MA, 14.5%-15.5% ofMLLDPE1018MA, 4%-6% of a long-lived master batch, 0.5%-0.68% of a PPA master batch and 3.5%-4.5% of an anti-scorching master batch. Through the greenhouse film prepared with the method, the directionof light rays is changed, strong light is changed into soft light rays, a spectrum transmitted on plants is changed, and is matched with the wave length absorbed by chlorophyll, plant growth is betterfacilitated, and the problem that crops are scorched is solved. The invention also provides the preparing method for the anti-scorching diffuse-scattering greenhouse film special for fruits and vegetables, and the preparing method is scientific, reasonable, simple and easy to achieve.

The invention discloses a light emitting diode and a preparation method thereof. The light emitting diode comprises a plurality of sub-chips which are electrically connected with one another, a first bonding pad, a second bonding pad and other bonding pads, wherein the adjacent sub-chips are spaced by a groove, at least one sub-chip comprises a first semiconductor layer, an active layer and a second semiconductor layer, and the plurality of sub-chips comprise a first sub-chip, a second sub-chip and at least one other sub-chip except the first sub-chip and the second sub-chip. The first bonding pad is electrically connected with the second semiconductor layer of the first sub-chip; the second bonding pad is electrically connected with the first semiconductor layer of the second sub-chip; and at least one other sub-chip is provided with one other bonding pad, and the other bonding pad is electrically connected with at most one of the first bonding pad or the second bonding pad. The phenomenon of non-uniform heat dissipation of the chip can be avoided, the problem of chip burning caused by poor heat dissipation of the light-emitting diode is solved, and the reliability of the chip is improved.

The invention discloses a beach umbrella and relates to beach umbrellas capable of absorbing ultraviolet radiation. The beach umbrella comprises an umbrella stem, a suction pump is arranged on the lower portion of the umbrella stem, ozone ceramic tubes are arranged in the umbrella stem, an air compressor and a gas storage tank are arranged on the umbrella stem, supporting rods are arranged at the top of the umbrella stem, a hollow transparent disk is fixedly arranged on the supporting rods and is provided with gas inlets and gas outlets, the gas inlets are connected with the air compressor, annular air curtains are arranged at the edge of the hollow transparent disk, connected with the gas outlets and arranged on the supporting rods, and partition boards are arranged in the umbrella stem and provided with openings connected with the air compressor. Compared with the prior art, the beach umbrella has the advantages that the beach umbrella is capable of absorbing ultraviolet radiation in sunlight automatically when people sunbathe, and the problem that the people are burned by intense ultraviolet radiation possibly or suffer from skin diseases induced by long-time ultraviolet radiation during sunbathing can be solved.

The invention relates to the technical field of wire electrodes, in particular to a wire cut electrical discharge machining device with a convex tooth structure and a wire electrode. The wire cut electrical discharge machining device comprises a shell, a fastening mechanism is mounted on the shell, the fastening mechanism is in threaded connection with the shell, a wire tightening mechanism is arranged in the shell, and the wire tightening mechanism is abutted against the fastening mechanism; and a telescopic mechanism is fixed to the bottom of the shell. A fifth gear rotates to drive a second bearing to rotate, the second bearing drives a conductive block to rotate, a conductive seat on the second bearing rotates synchronously, and a wire electrode body on the conductive seat rotates. According to the wire cut electrical discharge machining device with the convex tooth structure and the wire electrode, working liquid can be promoted to be brought into an interelectrode, meanwhile, the discharging of interelectrode corrosion removal products is accelerated, the interelectrode discharging condition is improved, the discharging rule is easier to control through regular protruding point crests on the surface of the wire electrode body with the convex tooth structure, and therefore the machining efficiency can be improved, and the surface quality can be improved; and the volume and the pitch of the chip containing space of the wire electrode body with the convex tooth structure can be controlled according to the rolling tooth shape size and the thread pitch.

The invention discloses a special camshaft high-frequency quenching device, and relates to the technical field of heat treatment equipment. The problems that during quenching machining of an existing camshaft, an existing induction coil is provided with an opening, during heating, opening heating unevenness, burning, cracking, hardness unevenness, quenching layer depth unevenness and the like are prone to happening, cracking is prone to happening, and the product quality is influenced are solved. The special camshaft high-frequency quenching device comprises an installing base, wherein a set of camshaft rotation drive pieces are fixedly connected to the lower portion of the front end face of the installing base; a set of lifting drive pieces are fixedly connected to the top of the installing base; a set of lifting sliding bases are in sliding connection to the left side of the installing base; and a set of slippage drive pieces are fixedly connected to the rear end faces of the lifting sliding bases. The special camshaft high-frequency quenching device solves the problems of burning, cracking, hardness unevenness, quenching layer depth unevenness and the like existing in the heat treatment process, the quality of the camshaft is improved, oxidation residues on the surface of a part are cleaned away, and the machining quality of the part is improved.

The invention relates to the use of acid-resistant coated pigments in PVC plastic. Acid-soluble pigments are provided with a coating consisting of an organic compound that melts at a temperature of T>200°C, and as a result the otherwise acid-soluble pigments are still protected from HCl vapour even at PVC processing temperatures of between 180 and 200°C.

The invention provides a method for preparing a compound fertilizer with an adjustable nitrogen-phosphorus-potassium ratio from a fertilizer-grade phosphoric acid eutectic. The method comprises the steps of (1) conducting double decomposition reaction; (2) conducting a neutralization reaction; (3) crystallizing and refining; and (4) filtering and drying. The method has the beneficial effects that the cost of raw materials is low, zero emission of the whole process is also realized through reutilization of crystallization mother liquor and recovery of a reaction byproduct hydrogen chloride, and efficient utilization of the raw materials is realized; the reaction is segmented, so that the conversion rate of potassium chloride in the reversible reaction is improved, and the problem of crop leaf burn caused by overhigh chlorine ion content of the fertilizer is solved; and the content of nitrogen, phosphorus and potassium in the product is regulated and controlled by simply regulating and controlling the feeding ratio of the reaction raw materials, the controllable range is large, and different requirements of actual agricultural production on the fertilizer can be met.

The invention discloses a hand tool with the function of intense pulsed light negative-pressure suction, and belongs to the field of medical instruments. The invention relates to a technology of intense pulsed light negative-pressure suction. The hand tool is used for solving the problems that light emitting portions and vacuum grooves of existing devices are planar, and therefore, when the skin is convex, light emitting openings and the skin are uneven in energy receiving, and the focus is incorrect, leading to burning or the noncompliance of the treatment effect. A suction shell is buckled to positioning columns on the hand tool through buckles on the suction shell to form the hand tool with the function of intense pulsed light negative-pressure suction; after a power supply is switchedon, a preparation button is pressed down, an air pump starts to work, and bidirectional negative pressure suction is performed through air pipe joints and air pipes; and when the suction shell is tightly attached to the skin of a human body, the air pump sucks out air in an annular groove, so that a small part, tightly attached to the suction shell, of the skin is sucked into the annular groove inthe suction shell. Since the annular groove is higher than a lens hole, the effect is better when the tool acts on a place with more proud flesh.

The invention relates to a melting switch, belonging to the manufacturing technical field of mechanical electric apparatuses switches. The invention solves the problems of overcoming damage and contact resistance of pole contact of a mechanical switch. The invention adopts a technical proposal that a low melting-point conductive substance is adhered to a mechanical contact of the pole or the low melting-point conductive substance is adopted as the contact directly. When in switching, the contact is heated firstly to melt the low melting-point conductive substance and then switching action is carried out, and finally the heating is stopped to cool the contact. Then the contact is fused into a whole after close. The invention is especially suitable for a site with big current and low requirement to the time of switching action.

The invention discloses a suspension type strawberry germplasm resource preservation method. Seedling substrate soil is adopted, a bio-organic fertilizer is added, the adding amount of the bio-organicfertilizer accounts for 5% of the volume of the seedling substrate soil, and the seedling substrate soil and the bio-organic fertilizer are uniformly mixed to obtain a seedling substrate; a seedlingpot is fully filled with the seedling substrate, and thorough watering is carried out; healthy and disease-free strawberry plants are selected, and the specification of seedlings is that 10 nutritionpot seedlings which are 1.0 cm in rhizome thickness, short, strong, solid and free of plant diseases and insect pests are selected; roots are dipped with a medicament before planting, and transplanting is carried out after root dipping of plants; during planting, no core is buried at the upper part, no root is exposed at the lower part, then the seedling pot is placed into a fixing ring of a suspension device, watering for 1-2 times every day is carried out within 7 days after field planting, local moisture of rhizomes and root systems is kept, and germination of new roots is promoted; and strawberry stock plants are preserved through the suspension type strawberry germplasm resource preservation method, the continuous cropping problem and the disease infection problem caused by open-fieldcultivation of the stock plants are solved, the germplasm resource mixing problem is effectively solved, and meanwhile space can be effectively utilized.