79results about How to "Good holding effect" patented technology

The invention provides an ice immobilization machining method for a metal honeycomb workpiece, belongs to the field of machining technological methods and relates to a machine tool fixture device and a machining method for immobilizing a metal honeycomb material through an ice immobilization manner to achieve ultralow-temperature cutting. The method comprises the steps that after metal honeycomb holes arranged in a metal honeycomb ice immobilizing fixture are filled with low-temperature pure water or cutting liquid, the metal honeycomb ice immobilizing fixture is arranged in an adjustable refrigerating testing cabinet, and the freezing temperature and the refrigerating time are set; and then the metal honeycomb ice immobilizing fixture is clamped to a machine tool worktable, metal honeycombs are machined through a liquid nitrogen internal spraying cutter, and the freezing state is maintained through liquid nitrogen external spraying. The method achieves the purpose of clamping of the metal honeycomb workpiece difficult to machine, the freezing temperature of the pure water or the cutting liquid and the temperature maintaining degree are effectively controlled, the machining immobilizing effect can be better, and the cutting precision is improved; and the operation of the method is convenient, the immobilizing effect is stable, the machining efficiency is high, and the machining effect is good.

The invention discloses a management method for a eucalyptus tree man-made forest. The management method comprises the steps of: preparing a forest land: cutting up and retaining logging residues in the forest land, performing soil preparation, then digging plant holes, wherein during arrangement of the plant holes, every two narrow rows and one wide rows form a group, multiple same groups are arranged in sequence, and after the plant holes are dug, an organic fertilizer is applied to each plant hole; performing forestation: selecting clone eucalyptus trees and native tree species to perform forestation, planting the eucalyptus trees on the narrow rows, and planting the native tree species on the wide rows; performing tending after forestation; performing fertilization: and performing cutting and constructing a multiple layered forest. According to the management method disclosed by the invention, by virtue of the means of adjusting the structure of the tree species, improving fertilizing and tending manners and updating a cutting mode, the productivity and carbon stock of the eucalyptus tree man-made forest are significantly improved, the capabilities of emission reduction and sink increment of the eucalyptus tree man-made forest are increased, the economic benefit and ecological benefit of the eucalyptus tree man-made forest are improved, the forest land is fully utilized, water and soil losses and land capability decline are effectively prevented, and sustainable management of the eucalyptus tree man-made forest is realized.

The invention discloses a method for improving acid soil, and mainly aims to overcome the problems that the fertility of conventional acid soil is degraded and the acid soil is relatively high in acidity. The method for improving the acid soil comprise the following implementation modes: preparing biomass charcoal and mushroom residues of fine particle sizes from agriculture and forestry wastes; sufficiently and uniformly mixing the prepared biomass charcoal and mushroom residues with acid soil so as to obtain a soil mixture; performing biochemical culture on the soil mixture. According to the method for improving the acid soil, a soil improvement substance is prepared from the agriculture and forestry wastes, and with the combination of an edible mushroom production residue product, the properties of the acid soil can be improved; the soil improvement substance is simple in preparation process, simple to use, low in cost and remarkable in effect, has advantages of environmental-friendliness, low carbon, resource recycling and the like, provides a novel way for acid soil improvement, and has good social and economic benefits and popularization application values.

A fastening element has a head (14), a stem (11) adjoining the head (14) and having a tip at its end remote from the head (14), a first spherical section (21) extending from the tip (13) in the direction of the head (14) and a second section (22) adjoining the first section (21) and extending in the direction of the head (14), and a thread profile (15) provided on the stem (11) and having, on the second section (22), a constant steep gradient with a lead angle (β₂) from 50° to 74° and, on the first section (21), a gradient that increases from the lead angle (β₂) of the second section (22) toward the tip (13), with a lead angle (β₁) at a half of a length between the tip (13) and the end (24) of the first section (21) remote from the tip (13) amounting to at least 75°.

The invention mainly discloses a heavy metal passivating and nitrogen-preserving method in a livestock manure aerobic composting process. The method comprises the following steps: according to a certain proportion and sequence, mixing livestock manure, a heavy metal passivating material, a biochemistry inhibitor and a conditioner, and performing aerobic composting, wherein according to parts by weight, an adding proportion of the livestock manure, the heavy metal passivating material, the biochemistry inhibitor and the conditioner is 1:0.005-0.2:0.001-0.01:0.3-0.5, and the heavy metal passivating material comprises one or more of modified charcoal, modified ground phosphate rock, modified zeolite, modified sepiolite and lime; and ventilating and turning over in natural conditions, composting for 30-45 days. The method is capable of performing the aerobic composting by using livestock and poultry industry and agriculture organic wastes of the livestock manure, straw and the like as rawmaterials, providing technical guidance for reducing heavy metal bio-availability in the livestock manure and reducing nitrogen nutrient loss, acquiring a high-quality organic fertilizer, and providing a scheme for agricultural healthy sustainable development.

A roller mount for a roller of a conveyer has an axle, multiple holding panels, and a fastener. The holding panels are mounted around a connecting end of the axle, and each has a positioning hole and a securing hole. The positioning hole has a diameter larger than that of the connecting end of the axle. At least one pair of male-female combination is defined between each pair of adjacent holding panels. A distance between an uppermost one pair of the at least one male-female combination and the positioning hole in one of a corresponding pair of adjacent holding panels is different that between the uppermost pair of male-female combination and the positioning hole in the other of the pair of adjacent holding panels. The fastener is mounted through the aligning securing holes in the holding panels.

The invention relates to a sowing technique, in particular to a stub no-tillage mechanical sowing cultivation method. The wheat stub no-tillage rape cultivation method comprises the steps of mechanically harvesting wheat, mixing selected rape seeds, chemical fertilizers and sheep dung, sowing rape seeds, performing rape field management, harvesting and the like. The method has the advantages of increasing soil moisture, reducing wind erosion and water and soil loss, regulating ground temperature, increasing nutrients in soil, improving activity of soil enzymes, preventing lodging, increasing forage grass and the like.

The invention relate to a soft board fixing device. The soft board fixing device comprises an air suction device and a first load bearing device communicated with the air suction device. The first load bearing device has a first cavity inside and comprises a first load bearing part. The first load bearing part is provided with a plurality of first through holes which are communicated with the first cavity. The soft board fixing device also comprises at least one second load bearing device. The at least one second load bearing device is arranged on the first load bearing part and has a second load bearing part. The second load bearing part is provided with a plurality of second through holes. The second through holes are communicated with the first through holes. The dimension of the second through holes is smaller than that of the first through holes. When used, the soft board fixing device can achieve better fixing effect and improve the excellent rate of subsequent products.

A jewelry assembly comprises a shank (30, 70, 110, 156, 172, 198) and a collet (10, 50, 108, 150, 164, 186) and a locking element (26, 28, 46, 48, 64, 66, 92, 94, 105, 107, 152, 162, 166, 170, 182, 184, 196, 202) on each of the collet (10, 50, 108, 150, 164, 186) and shank (30, 70, 110, 156, 172, 198) arranged to mechanically cooperate to hold the collet (10, 50, 108, 150, 164, 186) and shank (30, 70, 110, 156, 172, 198) in a predetermined relative position. Two locking elements (26, 28, 46, 48, 64, 66, 92, 94, 105, 107, 152, 162, 166, 170, 182, 184, 196, 202) may be provided on each side of the collet which are rounded protrusions and which cooperate with corresponding holes in the shank.

The invention discloses a riparian zone sewage reduction method, particularly a riparian zone sewage reduction method by combining a perennial vegetation zone and an infiltration reinforcement zone. The method comprises the following step: arranging an infiltration reinforcement zone and a perennial herb sewage interception buffer zone for the riparian zone, wherein the sewage interception buffer zone is composed of a hygrophytic herb zone, a mesozoic herb zone and a xeromorphic herb zone which are sequentially arranged from the riverbank to the place far away from the riverbank, a reaping mode is adopted to reduce the growth of the annual herbs, and the infiltration reinforcement zone is arranged between the hygrophytic herb zone and the mesozoic herb zone. The method can effectively intercept sewage and increase the infiltration amount of underground water; and the perennial herbs have developed root systems, so the reasonable arrangement of the perennial herbs is beneficial to enhancing the sewage interception capacity and water/soil retention capacity of the riparian zone. By sectionallly planting and arranging the hygrophytic, hygrophytic and xeromorphic perennial herbs, the vegetation can be regulated to enhance the sewage interception capacity of the riparian buffer zone.

The invention discloses a method for safely planting crops on manganese contaminated soil. The method comprises the following steps that straw is soaked in an alkaline solution for 1-2 days and subjected to pyrolysis for 1-2 hours at the temperature of 200-600 DEG C under the low-oxygen or anoxic condition after being taken out of the alkaline solution, pyrolysis cooling and smashing are conducted in sequence, and improved straw charcoal is obtained. The improved straw charcoal is applied to the manganese contaminated soil, and radix phytolaccae is planted dispersedly. The next year the radix phytolaccae grows, the crops are interplanted between the plants of the radix phytolaccae. The method for safely planting the crops on the manganese contaminated soil is provided by adopting the mode of applying the improved straw charcoal, planting the manganese hyperaccumulator radix phytolaccae and then interplanting other crops, so that safety production is achieved while the manganese contaminated soil is remedied, and the high soil utility value is obtained.

The invention relates to a chopping block type cutter device used on a loom and adopting the chopping means to cut fabrics. A cutter cam (5) is arranged on a detection shaft (4) in the cutter device of the loom, a bearing (8) and a moving blade seat (3) are disposed on an eccentric shaft (9), and the bearing (8) is in contact with the cutter cam (5); a blade (10) is arranged on the moving blade seat (3), and a blade fixed platen (11) and a blade platen (13) are disposed at both sides of the blade (10); a spring (2) and a gyration central shaft (14) of the moving blade seat are also arranged on the moving blade seat (3); a PU rubber pad (6) and a chopping block type bracket (7) are arranged on a stationary blade seat (1), and the stationary blade seat (1) is fixed on the loom; the stationary blade seat (1) is connected with the moving blade seat (3) through the spring (2) and the gyration central shaft (14) of the moving blade seat, and a nylon sleeve (12) is disposed on the gyration central shaft (14) of the moving blade seat between the stationary blade seat (1) and the moving blade seat (3). The device effectively avoids the slippage of fabrics at the cutting edge of the blade in the process of cutting, extends the service life of the blade, and reduces the amount of usage of the blade.

The improved plumb-bob is mainly consisted of a body section, a point section, and a fixing element, wherein a connecting means is arranged at the top of the body section by which it may be connected to a suspending cord, and the point section is a cylinder with a flange arranged at the shank, and the point section is provided at least at one end with a conical-pointed part, and the fixing element is bored from the low end to the upper end forming an upper portion and a lower portion. The upper portion is of larger diameter and the lower portion is of reduced diameter but is larger than that of the point section, thus forming an angular shoulder against which the fringe abuts when the parts are assembled to enable the conical-pointed part to project outwardly under the fixing element. The fixing element can hold and fix the point section in a proper position between the body and the fixing element. The invention may simplify the structure of the expandable point section such that not only the manufacturing cost of the point section is reduced, but also many unnecessary compatible constraints may be removed, that is, when the point section is damaged and no spared point section for replacement, a metal nail, such as iron nail, steel nail, etc., with similar diameter can be applied as a substitute.

A display device comprises a first frame, a second frame, a flexible panel, and a flat cable. The periphery of the flexible panel is clamped and arranged between the first frame and the second frame. The second frame comprises two opposite second straight-line segments. Each second bending segment is provided with an inner side surface and an outer side surface which are opposite to each other. The two inner side surfaces of the two second bending segments are opposite to each other. At least one second bending segment is provided with a first groove which penetrates through the corresponding bending segment and keeps a certain distance from the inner side surface and the outer side surface in the corresponding bending segment on which the first groove is located. The flat cable is electrically connected to the flexible panel and penetrates through the first groove.

The invention relates to an immobilized sediment and a preparation method and application thereof. The preparation method comprises the following steps: step one, taking a sediment, freezing the sediment, drying the frozen sediment, grinding the dried sediment, and sieving the ground sediment to obtain a sediment sample; step two, mixing the sediment sample with a sodium alginate solution uniformly and preparing standby mixed liquid; andstep three, adding the standby mixed liquid into a calcium chloride solution at a uniform speed, carrying out crosslinking to form an immobilized sediment. Theimmobilized sediment has the density of 2.1 to 2.5 g/cm<3>, the surface aperture of the immobilized sediment is 5 nm to 200 nm, and the superficial area of the sediment is 180 to 250cm<2>; and the immobilized sediment has the excellent retention ability and is capable of releasing the contaminants in the sediment continuously. The immobilized sediment can be applied to the total sediment and soiltoxicity testing; the testing process does not limit the growth of algae; and the density of the algae can be determined by a spectrophotometer. The method is simple and is operated rapidly; and measurement is sensitive.

The invention relates to a biomass organic-inorganic composite fertilizer, and a preparation process and application thereof. The preparation process provided by the invention comprises the following steps: a) mixing an organic matter mixture, hydroxyapatite and bentonite according to a mass ratio of (60-80): (5-10): (5-10) and subjecting a mixture obtained after mixing to charring under anoxic conditions so as to obtain a biochar-based organic substance, wherein the organic matter mixture is prepared by mixing traditional Chinese medicine residues and straw according to a mass ratio of (5-10): (20-40); b) mixing the biochar-based organic substance, night soil, straw and clay according to a mass ratio of (20-40): (30-40): (10-15): (10-15) in water so as to obtain a mixture which has water content of 15 to 25 wt%; and c) subjecting the mixture to composting and fermentation so as to obtain the biomass organic-inorganic composite fertilizer.

A card edge connector includes a longitudinal insulating body, a plurality of conductive terminals received in the insulating body, and a metal member disposed on the insulating body. The insulating body has two side walls extending in the longitudinal direction, end walls connecting the two side walls and a central slot formed by the two side walls and the two end walls, the card edge connector further comprises a light guide plate fixed on the outer side of the metal member, the metal member is located outside the insulating body to enhance product strength, and the light guide plate is placed outside the metal member to enhance the light guiding effect of the product.

The invention provides a method for evaluating toxicity of total sediments by using daphnia magna, which comprises the following steps: 1) taking sediments, freeze-drying, grinding and sieving to obtain a sediment sample; 2) detoxicating the sediment sample to obtain an in-situ blank sediment sample, and diluting the corresponding sediment sample by using the in-situ blank sediment sample to obtain a plurality of groups of mixed samples with equal mass and different sediment sample concentrations; 3) respectively stirring and uniformly mixing the mixed samples with a sodium alginate solution to prepare a plurality of groups of standby mixed solutions; 4) respectively adding the plurality of groups of standby mixed solutions into the plurality of groups of calcium chloride solutions at a constant speed, cross-linking to form immobilized total sediments, rinsing, transferring into standard dilution water containing daphnia magna, continuously culturing, and periodically recording the death number of daphnia magna; and 5) calculating the lethal medium concentration LC50 of the sediments according to the biological effect of the daphnia magna and the dilution ratio of the sediments, and judging the toxicity grade of the sediments. The method for determining the toxicity of the full sediments by utilizing the daphnia magna is simple, rapid and sensitive in determination.

The present invention relates to an adjustable micro-injection device, comprising a base structure, a clamping structure, a pressurizing impulse structure, a withdrawing structure, an injection controller and a quantitive controller, wherein the base structure is provided with a syringe positioning structure for accommodating an injection syringe and at least one holding part for hand holding operation; the clamping structure is positioned at one end of the injection syringe positioning structure for successively connecting the injection syringe and a injector needle tube; the pressurizing impulse structure is positioned at the other end of the injection syringe positioning structure and is connected with the base structure; the withdrawing structure is combined with the base structure and is positioned at the position of an adjacent pressurizing impulse structure; the injection controller is combined with the base structure and drives the pressurizing impulse structure to apply propelling pressure on a push barrel piston of the injection syringe via at least one driving structure; the quantitive controller is combined with the injection controller to move so as to control tolerance displacement quantity of drive of the driving structure to the pressurizing impulse structure. Compared with the prior structure, the bracket has the advantages that the bracket has more precise injection quantity control, better injection angle control, no contact with air for substances in the injection syringe, no requirement on special injection syringe and no replacement of the injection syringe by single hand.

An electrical connector comprises an insulation body, a plurality of terminals, a metal shielding sheet and a shading shell, wherein the plurality of terminals are fixedly arranged in the insulation body, the metal shielding sheet is fixedly arranged in the insulation body, the shading shell sleeves the insulation body, the metal shielding sheet comprises a retaining sheet, the shading shell is formed by injection molding of metal powder, the retaining sheet is connected with the shading shell by spot welding, the thickness of the shading shell at a welding point is at least two times of the thickness of the retaining sheet, and the shading shell has rigidity twice or more than twice of that of the retaining sheet.

The invention discloses a circumferential drilling device for machining agricultural machinery. The circumferential drilling device includes a driving mechanism, a clamping mechanism, drilling mechanisms, and a cooling mechanism, the circumferential drilling device slides in a sliding groove through a sliding block so that two arc-shaped carrier blocks move in opposite directions, when the arc-shaped carrier blocks clamp a structural part, a bolt corresponds to a threaded hole, the arc-shaped carrier blocks are fixed through rotating the bolt, mounting and fixation of the structural part are facilitated, the arc-shaped carrier blocks support the structural part, a certain distance is between the structural part and a disk, the lengths of drill bits on the drilling mechanisms are arranged not to be in contact with the disk, the disk can be effectively protected from being damaged, the two drilling mechanisms are parallelly arranged, a hydraulic oil cylinder drives an ejector rod to move, the drill bit is driven by the motor to rotate, the ejector rod drives the drill bit to move downward, the drill bit is pressed down by the ejector rod, each time the disk rotates by a set angle, the structural part can be punched with two holes, time is saved, and the efficiency of drilling is improved.

The invention provides a screen plate aluminum frame capable of adjusting and enhancing the fixing effect and particularly relates to a specific device which is capable of adjusting the transverse tension and the longitudinal and horizontal orientation of printing screen plates on the screen plate aluminum frame and enhancing the effect that the printing screen plates are fixed to the screen plate aluminum frame. The screen plate aluminum frame is characterized in that an L-shaped tension screen plate adjusting strap is arranged on a rectangular screen frame tube on each side of the screen plate aluminum frame in a sleeved mode and is capable of moving left and right and up and down to adjust the transverse tension and the longitudinal and horizontal orientation of the printing screen plates, screen plate viscose faces where the printing screen plates are adhered to the screen plate aluminum frame are provided with longitudinal barbed grooves or right-angle grooves or rectangular grooves respectively, so that the fixing effect that the printing screen plates are attached to the screen plate aluminum frame is enhanced, and requirements for electronic high-precision screen printing are met.

The invention provides board drilling equipment convenient for pressing materials. The equipment comprises a machine frame, a pressing part and drilling part below the pressing part. The machine frame comprises a beam and a guide rail, which are parallel to each other and both in the horizontal direction; the pressing part is arranged on the beam and can slide along the length direction of the beam; the pressing part comprises a slider with position adjustable in the length direction of the beam, a cylinder installation platform with position adjustable in the length direction of the slider is arranged below the slider, and a cylinder is fixedly connected below the cylinder installation platform. The equipment provided by the invention is convenient for adjusting the relative position of the cylinder to the beam and the slider, and it is convenient to adjust the cylinder position according to the specific drilling points of the board, so that the application point of the pressing part towards the board is at an optimum position, in order to facilitate the drilling accuracy.