41results about How to "Guaranteed to be effective for a long time" patented technology

The invention discloses a borrowed-soil remediation method for heavy metal contaminated soil in an orchard. The method comprises the steps of trench digging operation, blocking operation, soil covering operation and laying of an irrigation system, wherein the blocking operation is divided into blocking in the circumferential direction and blocking in the vertical direction, and the blocking operation can effectively avoid contact of borrowed-soil new soil with the original contaminated soil and prevent secondary pollution to the borrowed-soil uncontaminated new soil caused by natural or man-made processes such as natural rainfall leaching flushing, seepage, irrigation, underground water surging. The method provided by the invention adopts a manner of digging trenches to remediate the contaminated soil in the orchard, so that the engineering amount of covering of borrowed soil can be reduced, a large amount of excavation and transportation costs are saved, and the method is suitable forremediation of the heavy metal contaminated soil in the orchard; and meanwhile, the irrigation system is laid on the surface of the borrowed soil to effectively induce growth of roots of fruit treesto shallow soil, so that the depth requirement of the borrowed soil is reduced, and the costs of covering of the borrowed soil are effectively reduced.

The invention relates to a surface treatment method for improving the water resistance, and a treatment solution thereof. The method and the treatment solution are suitable for glass, ceramic, metal and other special substrates. The method comprises the following steps: A) deoiling: removing oil stains and dusts on the surface of a printing stock; B) activating: coating the surface of the printingstock with an activating solution; C) knifing: scraping the activating solution on the surface of the printing stock with a scraper to form an extremely thin water film; and D) drying: drying the activating solution on the surface of the printing stock. The method overcomes the defects of easy shedding and poor water boiling resistance of decorating pictures and texts on the surface of glass, ceramic, metal and other special substrates in packaging printing, and also can be applied to the fields of electronic packaging and composite materials.

The invention provides a graphite sealing material prepared from the following raw materials: 30 to 50 parts by weight of graphite, 14 to 75 parts by weight of rubber, 10 to 100 parts by weight of non-asbestos fibers, 5 to 20 parts by weight of a filler, and a rubber auxiliary agent, wherein the amount of the rubber auxiliary agent is 4% to 23% of the amount of the rubber. The graphite sealing material provided by the invention is a non-asbestos graphite sealing material, does not contain an asbestos ingredient; with use of an outstanding characteristic of the improved high temperature resistant level after graphite is combined with the rubber, with supplement of a certain proportion of the graphite and the rubber, and with addition of a specific combination and proportion of other auxiliary agents, the high temperature resistant ability of the sealing material is effectively improved, the use durability of the sealing material in a high temperature working environment is enhanced, and long-term effective sealing is ensured.

The invention discloses a side drainage type directly-embedded part. The directly-embedded part comprises a straight pipe which is of a cylinder structure, a spigot and socket pipe is fixedly arrangedat the middle position in the straight pipe in the axial direction and comprises a horn mouth section and a straight pipe section, the outer ring of the thicker end of the horn mouth section is fixedly connected to the inner wall of the straight pipe, one end of the straight pipe section is fixedly connected to the thinner end of the horn mouth section, a spigot and socket ring groove is formed between the outer circle of the straight pipe section and the inner wall of the straight pipe, and pre-embedded positioning structures are arranged on the outer circumference and the two end parts of the straight pipe. The invention further discloses a construction method for the side drainage type directly-embedded part. According to the directly-embedded part and the construction method thereof,the usage amount of waterproof materials, backfilling materials and drainage branch pipe fittings can be decreased, the wall penetrating and chiseling and hole plugging operation can be reduced, the structural strength quality of a wall body can be improved, the construction difficulty and the construction cost can be lowered, the drainage safety can be greatly improved, and the pipeline blockageprobability can be lowered.

The invention provides a gear oil for an oil pumping unit in an oilfield and a preparation method thereof. The gear oil is prepared from the following components in parts by mass: 8.0% to 11.0% of 500N basic oil, 75.0% to 85.0% of PAO40 basic oil, 5.0% to 10.0% of alkyl naphthalene basic oil, 1.0% to 3.0% of composite agent, 0.5% to 0.8% of antioxidant, 0.1% to 0.4% of pour point depressant, 0.1%to 0.4% of anti-emulsifier, and 0.01% to 0.02% of defoamer. The gear oil has the advantages that by adopting the pulse combination, the components can be more uniformly mixed; the basic oil adopts thesynthetic oil, so that the pour point of the gear oil is lower than -39 DEG C; because the self viscosity of the synthetic oil is higher, the problem of decreasing of viscosity of the gear oil due toshearing function is solved, and the anti-shearing function is realized.

Provided is a coating device for granular drugs.The coating device comprises a barrel, a piston, a crushing and stirring device and a drug-coating nozzle; a first end of the barrel is the open end, and a second end of the barrel is the closed end; the piston is arranged in the barrel and comprises a piston head, a piston rod and a handle; the second end of the barrel is provided with a handle hole allowing the handle to pass through, the handle extends to the outer side of the second end of the barrel from the handle hole and is latched at the second end of he barrel, and a spring is in a compression state; the crushing and stirring device or the drug-coating nozzle is detachably arranged at the first end of the barrel, the crushing and stirring device comprises a motor, a connecting rod and a tool bit, and the drug-coating nozzle forms a drug outlet; a cutoff device is arranged at the drug outlet and transversely inserted into the upper portion of the drug outlet, a spring is arranged between the upper end of the cutoff device and the upper side of the drug outlet, and the lower end of the cutoff device is inserted into a transverse groove formed in the upper portion of the drug outlet in a sealed mode.

The invention discloses a construction technology with a wood surface coated with wooden paint. Large white powder, rosin water and boiled tung oil are mixed according to the weight ratio of 12:8:1and stirred into fitness oil powder, cotton silks are dipped in the oil powder, the oil powder is evenly sprayed on the wood surface, and is wiped into wood bristle holes, linen or the cotton silks are used for wiping, remaining powder at line corners should be removed in time, and number 1 abrasive paper is used for carrying light polishing along with wood grains after the oil powder is dried. Gypsum powder and boiled tung oil are mixed according to the weight ratio of 20:7, pigments are added, and gypsum color putty is formed in a mixing mode. Lead oil, ready mixed paint, gasoline, lac varnish, varnish and the like are mixed and stirred, the color is adjusted to be identical to the color of a sample plate, and spraying is carried out along with the wood grains from outside to inside, from left to right and from top to bottom. The varnishing step is identical to the oil color painting step. The specific steps are adopted in the technology, the paint can be immersed into wood, the paint is kept effective for a long time, corrosion to the wood is reduced, and the service life is prolonged.

The invention discloses a bridge damping expansion joint. The bridge damping expansion joint comprises a square-groove-shaped joint body and a cushioning and damping structure located in the joint body, the cushioning and damping structure comprises a right corrugated rack and a left corrugated rack which are located on two sides in the joint body, the right corrugated rack and the left corrugatedrack have the same shape and structure and are arranged on a same horizontal plane in a staggered mode, upper surfaces of the corrugated racks are flush with a top surface of a bridge body, and the corrugated racks are provided with steel bar rods embedded in the bridge body; and convex parts and concave parts arranged at intervals are arranged at the tops of the corrugated racks, the front endsof the convex parts and the tail ends of the concave parts are all in a circular arc shape, and paralleled plates arranged in parallel with the convex parts are arranged under the concave parts. According to the bridge damping expansion joint, through the following movement of a damper, a stable state is kept when the joint body is contracted and stretched because of cold and hot effects, the damper is different from a regular single-type spring damping, when the distance of the joint body is changed because of temperature, the relative stability of the self length of spring can be kept, and the damping performance of the damper cannot be influenced due to long-time stretching and contraction, and the long time effectiveness of the cushioning and damping structure is guaranteed.

The invention relates to the field of power supply monitoring devices, and especially relates to a power grid grounding fault judging device. The power grid grounding fault judging device prevents misoperation by adopting technologies such as using a leakage current to control actions, improving sampling sensitivity, adopting electromagnetic shielding, and setting a threshold to obstruct interference. The power grid grounding fault judging device is provided with a special power supply circuit and an overvoltage protection circuit for improving adaptive capability of the judging device; and two optional functions of alarm and action are set for facilitating electricity utilization customers. The power grid grounding fault judging device is mainly cooperated with a general monitor, is applied to a neutral point ungrounded system, and can be applied to a grounding system independently for judging grounding fault positions. Main electronic circuits such as a special power supply, an overvoltage protection circuit, a sampling device, an alarm device, an action device, and D1, D2, D3 backflow isolation devices are arranged in a special shell and packaged into a leak current sampling module 3DCsquare by using a special glue to form an element which is reliable and durable, and the element can be used for forming various kinds of grounding fault judging devices.

The invention relates to a sludge geology release hole sand filling device and method. A conveying pipeline is connected with a water outlet of a sand suction pump, and the sand suction pump is suspended in a box by an electric block. Medium coarse sand is loaded into the box body from the steel slope side by a loader, and water is pumped into the box from a water inlet; the electric hoist is adjusted to sink the sand suction pump into the water, sinking continues while the sand suction pump is started, and the mixture of medium coarse sand and water is transported to a long auger driller through a conveying pipe; the mixture is fed into a release hole by a drill stem, and the release hole is filled along with lifting of the long auger stem. The sludge geology release hole sand filling method ensures that the release hole does not fail during construction of a pipe pile and after construction is completed, reduces the construction cost and increases the construction speed; and by meansof cooperation with the long auger driller, it can be ensured that a release channel of excess pore water is effective for a long time during pipe pile construction and after construction.

The invention provides a surface coating composition and a preparation method thereof; the components of the composition comprises polyvinyl butyral, alcohol, methyl substituted benzene, rosin, zinc phosphate, oxalic acid and fluorine-silicon polymers; the alcohol is alcohol having 2-4 C; the weight ratio of the components is 1:5-8:2-4:0.5-1.5:0.5-1:0.05-0.1:0.5-1.5; the method comprises: mixing,emulsifying and grinding the polyvinyl butyral, alcohol, methyl substituted benzene, rosin, zinc phosphate, oxalic acid and fluorine-silicon polymers; the surface coating composition can be applied to surface of metal members such as iron tower and other electricity equipment as permanent corrosion resistant coating material.

The invention relates to the field of marine signal devices. The invention discloses a smoke signal device for a safety ship. The problem that water easily enters the smoke signal device before or during use is solved; therefore, the problem of poor smoke signal effect is solved. According to the technical scheme, the device comprises a smoke signal mechanism, wherein the smoke signal mechanism comprises a smoke generation box and a base; the smoke generating box comprises an outer box and an inner box arranged in the outer box in a sleeved mode; the side wall of the inner box and the side wall of the outer box are respectively provided with at least one smoke scattering hole in a penetrating mode, the smoke scattering holes of the inner box and the smoke scattering holes of the outer boxare distributed in a staggered mode, a rotating motor used for controlling the relative positions of the inner box and the outer box is arranged between the inner box and the outer box, and an igniteris arranged in the inner box. The base is a floating seat capable of supporting the smoke generation box and the base in water, so that the possibility of contact between smoke medicine and water isgreatly reduced, and the effect of smoothly sending out smoke signals is fully guaranteed.