34results about How to "Not suitable for damage" patented technology

The invention relates to an automatic-door threaded rod of a railway vehicle and an anti-friction coating thereof as well as a spraying method of the anti-friction coating. The dry film thickness of the anti-friction coating is 15-25 micrometers, the flashing point of the coating is 110 DEG C, and the specific gravity of the coating is 1200+/-60g/L; and the coating comprises the following components in percentage by weight: 1-6% of molybdenum disulfide, 10-28% of graphite, 1-3% of graphite fluoride, 2-8% of tungsten disulfide, 0-3% of molybdenum diselenide, 1-3% of nanometer diamond, 1-5% of silicon nitride, 2-8% of aluminium oxide, 0-3% of silica, 0-2% of antimony trioxide, 3-15% of silicon carbide, 0-1.5% of carbon nanotube, 10-16% of polyester resin, 15-30% of epoxy resin, 6-20% of acrylic resin and 0-8% of powder surface treating agent. The automatic-door threaded rod of the railway vehicle, which adopts the anti-friction coating, has good self-lubrication and abrasion performance; the production process is simple; and the production cost is low.

The invention discloses an easy-to-operate hollow sand cylinder sample preparation device and method. The sample preparation device comprises a base, an outer mold, an inner mold, a blanking assembly,a discharge compaction assembly and a tamping assembly, wherein the blanking assembly comprises an annular fixing plate, a rotary table is rotationally arranged in a through hole in the annular fixing plate, and a funnel is arranged below the rotary table; the discharge compaction assembly comprises a bearing plate, an annular pressure head and force transmission rods, a piston is arranged in theannular pressure head, and a sleeve rod is glidingly arranged outside each force transmission rod in a sleeving manner; the tamping assembly comprises a scale rod, and the scale rod is glidingly sleeved with a tamping rod. The sample preparation method comprises the following steps: the discharge compaction assembly is raised to a certain height along guide rods, sand is uniformly sprayed to theupper end face of the annular pressure head, the sand above the annular pressure head falls into the bottom of a sample cavity, the bottom of the annular pressure head is pressed above the sand in thesample cavity, and a rammer is dropped repeatedly.

The invention relates to an antifriction coating layer of a screw compressor, and in particular relates to a screw with a composite molybdenum disulfide antifriction coating layer for a dry type screw compressor. The thickness of a dry film of the antifriction coating layer is 30-50 microns; and the antifriction coating consists of 10-16% of polyester resin, 12-30% of epoxy resin, 6-10% of acrylic resin, 1-6% of molybdenum disulfide, 10-16% of graphite, 1-4% of graphite fluoride, 2-9% of tungsten disulfide, 0-3% of molybdenum diselenide, 1-3% of nano diamond, 1-15% of silicon nitride, 2-10% of aluminium oxide, 0-3% of silicon dioxide, 0-2% of antimony trioxide, 3-15% of silicon carbide and 0-1.5% of carbon nano tube based on the total weight. The antifriction coating layer provided by the invention has good wear resistance and corrosion resistance; and the screw with a composite molybdenum disulfide antifriction layer provided by the invention can guarantee the operation stability of the screw compressor in a dry state, improves the air quality of the compressor, and meets the harsh requirements on the air quality of compressor in the food production, the packaging industry, the pharmacy, the bioengineering, the electroplating industry, the automobile spraying industry and the textile industry.

The invention discloses a method for breeding an high-yield ascomycin strain by performing femtosecond laser mutagenesis on streptomyces hygroscopicus ascomycota subspecies and a culture medium preparation method; the method comprises the following steps: at room temperature, mixing mature slant spores of the streptomyces hygroscopicus ascomycota subspecies (ATCC14891) and sterile water to obtain monospore suspension containing 106-107 spores per milliliter; irradiating the spore suspension for 1-10 min by using the titanium sapphire femtosecond laser with centre wavelength of 800 nm, pulse width of 150 fs and frequency of 76 MHz under a irradiation power of 10-30m W; properly diluting the spore suspension, coating on a solid panel to culture, then screening by using a shake flask to obtain a high-yield ascomycin mutation strain. The method provided by the invention has the advantages that the used femtosecond laser mutagenesis method is feasible and safe to operate; the mutation effect is better than that of the traditional physical and chemical mutagenesis method, and the femtosecond laser mutagenesis method has great popularization value in breeding of microorganism pharmaceutical strains; by using the femtosecond laser irradiation to perform the mutagenesis, the high-yield ascomycin mutation strain can be bred. The positive mutation rate of the mutation strain is 5-30%, and fermenting unit is improved by 10-60% in comparison with that of an original strain.

The invention discloses an enclosure experiment system suitable for nereis bioremediation. The enclosure experiment system comprises vertical bars and cross bars which form a rectangular frame by enclosing, and two ends of each vertical bar extend out of the rectangular frame; a surrounding net is arranged on the side face of the enclosure experiment system; the top face of the enclosure experiment system is provided with a sunshade net, the side faces of enclosure experiment system are provided with entrances, and a polyethylene lining net is arranged on the inner side of each entrance. The invention further discloses a construction method of the enclosure experiment system suitable for nereis bioremediation. The enclosure experiment system suitable is adopted for nereis remediation of tidal flat habitat, and good effect is obtained. The enclosure experiment system is simple to install and low in cost, the nereis is protected effectively and cannot escape, and convenient is brought to people to get in for sampling due to the arranged personal entrances. The main components are made of wooden poles and bamboo poles, so that the enclosure experiment system is good in flexibility, convenient to transport and not easy to damage.

The invention discloses a method for mounting pictures or photographs. The method comprises the following processes of: providing pictures or photographs; covering glue on the pictures or the photographs for curing, scraping the glue radially by using a scraping plate from the center to the periphery, and ensuring constant speed, smoothness and no bubbles in the process of scraping the glue; putting a transparent panel for sizing treatment on the pictures or the photographs, and extruding at the constant speed by a cold press to perform adhesive bonding; curing the pictures or the photographsunder a purple light curing lamp or sunlight flatly at the temperature of between 25 and 30 DEG C for 30 minutes; preparing double-faced adhesive tapes on the reverse sides of the cured pictures or the cured photographs by using a cold laminating machine, and pressing the pictures or the photographs on a lining plate; cutting, and grinding edges integrally; and arranging a hanging piece or a support piece on the lining plate, and drying naturally. The method has the advantages of environmental protection, attractive appearance, beautiful frames, good perspective, long color duration, flat andsmooth edges, firmness, difficult damage, simple and easy installation and invisibility, and has extremely high ornamental value and collection value.

The invention discloses an experimental mouse caudal vein micro injector, which comprises a syringe tube, a push rod, an electric pushing block, an electronic pump, a syringe needle base, a soft hose and a syringe needle, wherein the push rod is arranged in the syringe tube in a movable mode; and a micro flow meter is arranged on the electronic pump. The back end of the micro flow meter is connected to the syringe tube; the front end of the micro flow meter is provided with the flexible soft hose; the front end of the flexible soft hose is connected to the syringe needle base; the needle head is detachably arranged at the front end of the syringe needle base; and the syringe tube is detachably arranged on the electronic pump. A motor and a toothed strip are arranged on the electronic pump; the motor is meshed with the toothed strip by virtue of a gear; the electronic pushing block is arranged on the toothed strip; a sliding guide rail is arranged on the electronic pump; a display screen, a timer and a pushing block sliding cavity are arranged on the electronic pump; the display screen and the micro flow meter are connected; the timer and the motor are connected; and flow regulating buttons are arranged on the display screen. With the implementation of the micro injector disclosed by the invention, it can precisely control an injection speed and conduct metering, which is conducive to the accuracy of experimental results; the syringe needle does not easily become fallen and blood vessels are not easily damaged;and caudal vein injection can be completed by one person; therefore, the micro injector is labor-saving and is convenient to operate.

The invention discloses a novel plant tissue culture flask. The novel plant tissue culture flask comprises a flask hood and a flask cylinder. The flask hood is detachably connected to the upper portion of the flask cylinder in a sealing mode. The flask hood comprises a cylindrical flask body and an arc top integrally formed with the flask body. An air inlet pipe is arranged in the middle of the arc top, and an air outlet pipe is arranged on the flask body. The height of the flask cylinder is 1/3-1/2 that of the flask body, and a flask holder is connected to the bottom of the flask cylinder. An internal thread segment is arranged on the flask body, and the flask cylinder is provided with an external thread segment meshed with the internal thread segment. The air inlet pipe and the air outlet pipe are both provided with a detachable micropore bacterial filter. Pipe ports of the air inlet pipe and the air outlet pipe are provided with circular-truncated-cone-shaped closing covers connected through a flexible piece. The combined split closed culture flask is designed, the flask hood and the flask cylinder are of a split structure, the size of the flask cylinder is equal to a pipe diameter, when operation, experimental recording and photographing and acclimatization and transplanting are needed, the flask hood and the flask cylinder are separated, and the novel plant tissue culture flask has the advantages that operation can be conveniently performed under direct vision, and roots, stems and leaves of plants cannot be easily damaged.

The invention relates to a decoration material, and discloses glass used for ground decoration.The glass comprises an elastic body.The elastic body is provided with first tempered glass, a first steel wire net, an anti-impact layer, a second steel wire net, an oil paint protective layer, an oil paint layer, a transparent glaze material layer and surface tempered glass in sequence from inside to outside.The surface tempered glass is provided with a circular protrusion and further provided with an anti-skid layer.The transparent glaze material layer, the surface tempered glass and the anti-skid layer are transparent.The first tempered glass, the first steel wire net, the anti-impact layer, the second steel wire net and the oil paint protective layer form an anti-impact assembly, so that the problem that the second steel wire net tears the oil paint layer when impacted is prevented, and the problem that the oil paint layer is discolored when affected by damp is prevented.The whole impact resistance is enhanced by the elastic body, and therefore the glass used for ground decoration will not be damaged when impacted; the color is more gorgeous and richer due to the cooperation of the transparent glaze material layer and the oil paint layer; the surface of the glass used for ground decoration is resistant to skid.

The invention is an open type ring flange for fastening a high-pressure oil tube. Below a matching surface (4) of a cast and formed flange body (3), namely the internal wall at the lower end of the flange body (3) is provided with a ring-shaped sealing groove (2); and the upper end of the flange body (3) is a reinforcing rib (5) integrated with the flange body (3) into a whole. The open type ring flange has higher integrative strength, is difficulty to damage, has longer service life and higher manufacturing productivity, saves raw materials, and guarantees that the pipeline and a hydraulic oil cylinder are closed more tightly and firmly.