33results about How to "Effective break" patented technology

The invention discloses an anti-drop and rat-proof board, comprising a rat-blocking part, a mounting part for installing the rat-blocking part, and a monitoring part. The second mouse blocking plate, one end of the first mouse blocking board away from the second mouse blocking board is provided with a safety pin fixing piece, the safety pin fixing piece 1 is installed on the upper and lower ends of one side of the first mouse blocking mouse board, and the safety pin fixing piece A safety pin shaft is connected between the two safety pin fixing parts, a proximity switch is arranged on the door frame, a proximity switch block is arranged on the first mouse-blocking plate close to one side of the door frame and opposite to the proximity switch, and the proximity switch is electrically connected with an alarm buzzer. buzzer and warning light; the invention adjusts the nested second anti-rat boards to adapt to different widths according to the width of the door frame of different power distribution rooms, and is fixed; a fracture stress adjustable safety pin is set at the corresponding position as a safety device to prevent Causing people to trip and fall; set and install proximity switches for position detection to prevent small animals from taking the opportunity to enter.

The invention discloses a method for preparing monophenolic chemicals by loading ruthenium on metal organic framework material derivatives to catalyze lignin depolymerization. The method uses lignin as a raw material and small organic molecule alcohol as a reaction medium, and realizes the selective transformation of lignin by adjusting the metal ruthenium loading of the catalyst and the conditions of the catalytic system, while suppressing the formation of coke as a by-product. When the loading amount of ruthenium is 0.5wt.%~5wt.%, H 2 Under the conditions of pressure of 1-5MPa, reaction time of 230-290°C, and reaction time of 2-12 hours, the conversion rate of lignin can reach up to 80.20%, and the yield of monophenolic products can reach up to 14.45wt.%. The lowest yield is only 0.8wt.%, the highest yield of 4-ethylphenol reaches 5.56wt.%, and the highest selectivity can reach 41.72%. After the catalyst of the present invention is repeated 10 times, there is no obvious decrease in activity.

The invention provides a grinding wheel for gallium arsenide crystal thinning, a preparation method and application. The grinding wheel is provided with a porous structure, and is prepared from the following raw material of, in percentage by weight, 10%-35% of diamond abrasive, 15%-42% of polyimide resin powder, 5%-20% of foaming agent, 5%-20% of calcium fluoride, 3%-15% of molybdenum disulfide, 8%-30% of white corundum and 5%-12% of zinc oxide. The grinding wheel is of the porous structure, a binding agent bridge established through the porous structure generates effective breakage during grinding, the self-sharpening performance of the grinding wheel is good, and the trimming frequency is reduced; a damaged layer on the surface of a gallium arsenide wafer is reduced, pressure is reducedfor a subsequent polishing process, and the periodic production efficiency is improved; and a molybdenum disulfide solid lubricant material is added into a grinding wheel system so that the friction coefficient of the grinding wheel can be reduced, the grinding heat is effectively reduced, the probability of workpiece burning is reduced, and the surface quality of the gallium arsenide wafer is improved.

The invention provides a tool positioning device with simple structure, increased processing precision and work efficiency. A hollow cylindrical ring sleeve (8A1-8A3) comprises a hole (8a) engaged with the tool in a center part along the axle direction (O) and is clamped on the head between the tool and the tool. An upper end surface (8Au) along the axle direction on the ring sleeve (8A1-8A3) forms the surface vertical to the axle (O). In addition, the ring sleeve (8A1-8A3) comprises an inclined surface (8Ad) amplifying from the lower end to the upper end along the axle direction. Thus the inclined surface may form a conical surface with an included angle between the inclined surface and the axle being 5-85 degree and also may form a curved surface with an included angle between the tangent of the outer edge intersecting to the hole (8a) and the axle (O) being 5-85 degree.

The invention discloses an anti-broken needle device of a standard matching instrument, which comprises a base, a fixed plate, a slider, a liquid transfer needle, a position detection device and a flexible positioning device, and a device for the slider to go up and down is arranged between the fixed plate and the base. A sliding slide, the slide is installed in the slide, the pipetting needle is fixed at the bottom of the slide, and the flexible positioning device is used to apply a lateral contact force to the slide, so that the slide is fixed in the slide. The flexible positioning device includes a positioning ball, a positioning spring, and a positioning groove arranged on the side of the slider to match the positioning ball. A horizontal sliding hole is provided on the fixing plate, and the positioning ball can be freely slidably installed in the horizontal sliding hole for positioning. One end of the spring is in contact with the positioning ball, and the other end is fixed in the horizontal sliding hole. The elastic force of the positioning spring makes the positioning ball keep the pretightening force stuck in the positioning groove. The present invention can detect the deviation of the pipetting needle in time, can feedback the abnormal operation of the pipetting needle in time, and effectively prevents the abnormal breakage of the pipetting needle.

The invention provides an indexable cutter blade for turning, which belongs to the technical field of a machining cutter, and solves the problems that the existing turning cutter blade is limited in control capacity for cuttings and the machined product is low in precision. The indexable cutter blade for turning comprises a cutter blade main body with an upper surface, a lower surface and side surfaces, wherein a cutting edge part is respectively formed between the two adjacent side surfaces and the upper surface, each cutting edge part is provided with a cutting edge angle, two sides of each cutting edge angle are respectively provided with a finishing edge, a cuttings accommodating groove is formed between two finishing edges, two sides of the cuttings accommodating groove are provided with cuttings breaking tables which are symmetric to each other, and the cuttings breaking tables are protruded upwards along the cutter blade main body and connected with the finishing edges. The indexable cutter blade has the advantages of higher cutting efficiency, good cuttings breaking effect and the like.

The invention relates to the technical field of oil preparation via waste tires and particularly relates to an oil preparation method via waste tire degradation. Clear lime water and a waste tire are mixed so that calcium ions and hydroxyl ions can react with oil effective components and sulfur-containing components in the tire; by controlling the heating rate in a nitrogen protection environment, the bonds S-S and S-C in the waste tire break to remove the sulfur components while retaining the oil components; by controlling the temperature at 400-450 DEG C and pressure at 16-18MPa and 1.1-3h of reaction at constant temperature under constant pressure, the bonds S-S and S-C in the waste tire can break effectively under the effect of a desulfurizing agent, and the requirements on equipment are lowered; and moreover, through 10-20min of constant-pressure treatment at a temperature of 200-270 DEG C, the oil components and metal oxides in the desulfurizing agent react with other impurity components in the waste tire, and the oil recovery rate reaches 63-71%.

The invention belongs to the technical field of grafting devices for seed watermelons, and in particular relates to a grafting device for the seed watermelons. The device comprises a base seat; two vertical plates are fixed on the upper end of the base seat, and the opposite side walls of the two vertical plates are separately and fixedly connected with one transverse plate; the side wall of one end, far away from one corresponding vertical plate, of each transverse plate is provided with one first adjusting mechanism, and one end, far away from one corresponding transverse plate, of each first adjusting mechanism is fixedly connected with one clamping plate; and the upper end cross section of each clamping plate is semicircular, the lower part of each clamping plate is arc-shaped, each clamping plate is provided with one second adjusting mechanism, each second adjusting mechanism is arranged near the upper end of one corresponding clamping plate, and the side wall of one end, close toone transverse plate, of each clamping plate is fixedly connected with one limiting mechanism. The device disclosed by the invention has the advantages that when a grafting method is used for grafting, scions or rootstock can be effectively prevented from being cut, scion seedlings obtained after grafting can be effectively fixed to prevent stems of the scion seedlings from being broken, and a survival rate of the scion seedlings obtained after the grafting of the watermelons can be effectively improved.

The invention discloses thermochemical modified starch, a preparation method and a method for preparing an adhesive by using the thermochemical modified starch and relates to modified starch and adhesives prepared by using the starch. The method is used for solving the technical problems of the existing starch adhesives that the water resistance is not ideal, the transportation cost is high, and the starch modification process is complicated. The thermochemical modified starch is prepared through uniformly spraying an acid solution into the starch, carrying out uniform mixing, then, carrying out heating treatment, carrying out baking, carrying out cooling, and then, carrying out crushing. The method for preparing the adhesive comprises the following steps: adding polyvinyl alcohol into a reactor pot with stirring, heating and cooling devices, adding water, adopting a staged-heating method to dissolve the polyvinyl alcohol with stirring, and then, cooling to room temperature; adding the thermochemical modified starch, carrying out stirring at room temperature, and then, adding polymethylene polyphenyl polyisocyanate, thereby obtaining the adhesive. According to the method, by using the technological characteristic that the starch-based adhesive is prepared by only adding the water to the thermochemical modified starch before use, the problem that the traditional solution type starch main agents are low in transportation efficiency and are prone to layering and mildewing is solved.