3001results about How to "Improve airtightness" patented technology

An optical device for optically multiplexing or demultiplexing light of different predetermined wavelengths is provided, the optical device comprising at least one first waveguide (11) and at least one second waveguide (12) formed on a substrate (10), wherein the at least one first waveguide and the at least one second waveguide intersect at an intersection, comprising a diffraction grating structure (13) formed at the intersection. There exists a first wavelength or wavelength band travelling within the first waveguide (11) exciting the grating structure and being diffracted an angle corresponding to an outcoupling direction and there exists a second wavelength or wavelength band, different from the first wavelength or wavelength band, travelling within the second waveguide (12) exciting the grating structure and being diffracted at an angle corresponding to the same outcoupling direction. The two radiation beams comprising radiation of two different wavelengths or wavelength bands are spatially separated into the optical waveguides (11 and 12) or combined into single outcoupling direction, e.g. into a single optical element, e.g. a single optical fiber (21). An optical device may be used in local access communications such as fiber to the home, office or curb applications.

The invention discloses a novel rubber protective wax which comprises the following components in percentage by weight: 14-20 percent of paraffin, 55-60 percent of mixed crystal wax, 24-30 percent ofmicrocrystalline wax and 1-2 percent of polyethylene wax. The invention has favorable seal performance and can reinforce the ozone and ageing resistance of a rubber product and prolong the service life of the rubber product.

The invention discloses a drying unit of a nitrogen-source heat pump, comprising a drying box, a control system and an outdoor condenser, wherein the drying box comprises a box body, a heat pump chamber and a drying chamber; and the heat pump chamber and the drying chamber are arranged in the box body. The drying unit forms drying gas adjusting equipment with a nitrogen source, heat-pump equipment and a nitrogen device form a nitrogen heat-pump combining device so as to construct a closed circulation loop which adopts nitrogen as a medium to dry materials and effectively control the content of nitrogen in the drying chamber; and high-viscosity glass cement is used for sealing internal and external gaps of a drying room, a ventilating channel is modified, and a baffle, an arc-shaped air guide plate and an air uniformizing plate are added to enable the gas drying medium to be uniformly distributed in the drying chamber under certain air speed. The drying unit disclosed by the invention has the beneficial effects that the heat pump and a nitrogen combining device are used, the advantages of no pollution and low energy consumption of the heat pump can be fully utilized, the materials are dried under the condition of adopting nitrogen as a drying medium, the oxidation of the materials is prevented, the nutritional ingredients of the materials are retained, and the quality of dried products is improved.

A wearer wears a urine receptacle in which a urine absorbent material 3 is housed in a substantially rectangular, non-breathable, liquid-impermeable outer sheet having a U-shaped cross-section, and the surface of the urine absorbent material is covered with a hard-breathable, liquid permeable top sheet. Urine is discharged from a urine drainage port formed on the bottom surface of the outer sheet to a sealed urine tank by a vacuum pump through urine drainage tubes.

The invention relates to a seamless knitted leak-proof mask. The edge of the mask is divided into rib stitch, purl stitch or laying-in stitch; the included angle between the stitch wale of the rib stitch or laying-in stitch and the edge of the seamless knitted leak-proof mask is 90+ / -5 degrees, and the included angle between the stitch wale of the purl stitch and the edge of the seamless knitted leak-proof mask is 0+ / -5 degrees; the edge contains high elastic yarn, the content of the high elastic yarn is larger than or equal to 50wt%, the elastic recovery rate of the high elastic yarn is larger than or equal to 40% when the constant elongation of the high elastic yarn is 5%, and the width of the edge is 5-20 mm; the rib stitch is 1+1 rib or 2+1 rib or 2+2 rib or 3+2 rib or 3+3 rib. The seamless knitted leak-proof mask has the advantages that the edge can be deformed according to the movement of the face, so that the edge of the mask can always fit the face of the human body under all circumstances, thereby improving the airtightness of the mask.

The invention discloses a super-long and high-accurate horizontal boring construction plan. The plan is that a proper horizontal borer is used for driving a bit connected with a bore rod to turn to take cores and cut holes; a guiding device is used for controlling a decline rate; a slurry pump is used for pumping out the bore scraps generated in a boring process, so as to form a set-caliber super-long and high-accurate horizontal boring. The invention adopts a compound connection measure of combining a screw connection and a welding connection to connect the bore rod, guaranteeing the concentricity and sealing of the bore rod. When in a horizontal boring process, a freezing cut sealing and a freezer sealing are adopted. An area ranging from 8cm to 10cm is preserved as a safety layer in a tube-boring process on a concrete wall. And a strict deviation measuring and a deviation controlling are adopted to guarantee the construction safety. The form and improvement of the construction plan of the invention experiences many tests, researches and improvements, and a horizontal frozen boring bored through the construction plan of the invention can be provided with a high accuracy even when a construction horizontal length is too long.

An optical device for optically multiplexing or demultiplexing light of different predetermined wavelengths is provided, the optical device comprising at least one first waveguide (11) and at least one second waveguide (12) formed on a substrate (10), wherein the at least one first waveguide and the at least one second waveguide intersect at an intersection, comprising a diffraction grating structure (13) formed at the intersection. There exists a first wavelength or wavelength band travelling within the first waveguide (11) exciting the grating structure and being diffracted an angle corresponding to an outcoupling direction and there exists a second wavelength or wavelength band, different from the first wavelength or wavelength band, travelling within the second waveguide (12) exciting the grating structure and being diffracted at an angle corresponding to the same outcoupling direction. The two radiation beams comprising radiation of two different wavelengths or wavelength bands are spatially separated into the optical waveguides (11 and 12) or combined into single outcoupling direction, e.g. into a single optical element, e.g. a single optical fiber (21). An optical device may be used in local access communications such as fiber to the home, office or curb applications.

The invention relates to a device and method for preparing a large-size high-quality graphene single crystal. The device comprises a shell and a top cover. The top cover is internally provided with a gas spray head with a gas distributing pipe so that inlet high-purity gas can enter a reaction cavity in an evenly-distributed mode. The reaction cavity is composed of sealed silica pipes, a graphite heating element connected between the two sealed silica pipes in an inserted mode and a graphite crucible placed in the graphite heating element. The graphite crucible is used for containing a SiC wafer substrate. A cooling water system and an intermediate frequency coil are arranged outside the graphite heating element. A gas outlet is formed in the bottom of the shell. The invention further provides the method for preparing the large-size high-quality graphene single crystal on the SiC substrate. By means of the device and method, the migration rate of the high-quality graphene crystal prepared on the SiC substrate is higher than that of graphene prepared through a SiC high-temperature pyrolysis method by 1-2 orders of magnitudes.

The invention provides an epoxy resin self-repairing microcapsule and a preparation method thereof. The method comprises the following steps: mixing a water phase containing inorganic nanoparticles and water with an oil phase containing epoxy resin, monoolefin monomer, a polyene cross-linking agent and an initiator to form a stable oil-in-water emulsion; and heating the emulsion to realize emulsion polymerization in order to form the epoxy resin self-repairing microcapsule. The epoxy resin self-repairing microcapsule is prepared by adopting the inorganic nanoparticles as an emulsifier through an emulsion polymerization process via the method; and compared with methods adopting molecular emulsifiers, the method provided by the invention has the advantages of no need of subsequent emulsifier removal, simple process, and no pollution to environment. The epoxy resin self-repairing microcapsule prepared in the invention has the advantages of excellent stability, excellent leakproofness and high cladding rate.

The invention provides an aeroponic virus-free seed potato breeding method and equipment. The breeding method includes the following steps: equipment cleaning and disinfection, greenhouse disinfection through a smoke drug, seedling hardening, planting and atomization, illumination and temperature management, seedling shedding, overgrowth and lodging control, nutrient solution concentration management, nutrient solution pH value management, nutrient solution temperature management, pest and disease damage prevention, and harvesting. The breeding equipment includes cultivation tanks, cultivation plates, a nutrient solution, a solution storage container, a solution delivery pipe, atomization nozzles, a circulating pump, and a nutrient solution return pipe, wherein each cultivation tank is a cuboid tank of which the length is much larger than the width, the inner surface of each cultivation tank is painted black, the outer surface of each cultivation tank is painted silvery grey, and each cultivation tank is supported from the ground through a bracket; the solution storage container is an underground solution storage pool, a temperature sensor is arranged in the solution storage pool, and a nutrient solution cooling thermolator is arranged outside the solution storage pool. The method provided by the invention can reduce the seedling time, prolong the collection period, and increase the yield; the number of stolons is increased, so as to lay a foundation for a higher yield of virus-free seed potatoes. The equipment provided by the invention is convenient to manage, can save energy, and runs reliably.

The invention provides a steel plate and concrete combined underground continuous wall which is formed by the connection of a plurality sections of wall bodies, and each wall body is composed of two outer steel plates (1) and inner concrete (2), the two outer steel plates (1) are connected with cylindrical cross-pulling rebars (3) and rectangular vertical baffles (4), as the vertical baffles (4) are arranged between the two steel plates, the concrete can be poured into branched storehouses and the joint pipes are saved; the end part of each steel plate (1) is bent into an L-shape to form a steel plate joint (6), so as to guarantee the wall body to be provided with better anti-permeability after butt joint; the wall is in mutual vertical connection with a beam plate (7) of the architectural structure, the rebar of the beam plate (7) can be welded onto the steel plate of the underground continuous wall, and rebars or the stiffeners (8) of the steel plate and the triangular bearing (9) are arranged on the relevant position of the wall body. The invention further provides a construction method of the steel plate concrete composite underground continuous wall, which comprises six steps. The underground continuous wall provided by the invention is good in anti-permeability, small in wall body section and is provided with supporting and bearing functions.

A labor-saving push-button water valve includes a button, a valve core, a valve core spring, and a valve seat. The middle portion of the valve seat is formed with a core chamber. An outer periphery of a front end of the valve core is formed with an annular groove. When the button drives the valve core to move to the position where a water inlet hole is not communicated with a water outlet hole, an annular hydraulic chamber is formed between the valve core and the peripheral wall of the core chamber. The water valve is able to switch the opening and closing of the waterway smoothly by reducing the water pressure applied to the valve core, and reduces the wear of the valve core, and improves the service life and the airtightness of the water saving structure.

The invention relates to a flame-retardant polyurethane spray-coating sealing material and a preparation method thereof. The flame-retardant polyurethane spray-coating sealing material is composed of a component A and a component B in a weight ratio of 1:1, wherein the component A is prepared from the following components in percentage by weight: 10-20% of polyether glycol A, 10-20% of polyether glycol B, 15-25% of polyester polyol, 0.5-1.5% of foam stabilizer, 0.5-1% of water, 2.5-7.5% of catalyst A, 1-2.5% of catalyst B, 16-24% of foaming agent, 10-20% of flame retardant A and 5-15% of flame retardant B; and the component B is polyphenyl-polymethylene polyisocyanate. The preparation method comprises the following steps: preparing the raw materials, preparing the component A, and mixing the component A and component B in the weight ratio of 1:1. The flame-retardant polyurethane spray-coating sealing material has the advantages of favorable foam sealability, excellent flame retardancy and high product stability.

The invention relates to a damper of a washing machine which produces a large damping force for low-frequency vibration while small damping force for high-frequency vibration. A piston (3) coupled with a piston rod (4) is embedded inside a cylinder which is filled with mixed oil liquid and gas, and the piston (3) is infused in the oil liquid. No free piston and other isolators are arranged at the borderline of the oil liquid and gas inside the cylinder (2). The piston (3) is provided with a throttle path (7) communicated with two chambers (2A and 2B). The cylinder (2) is connected with one side of a water tank holding the cylinder, while the piston rod (4) is connected with one side of the shell. For low-frequency vibration during the washing and rinsing process, a large damping force is generated through the resistance of the oil liquid flowing through the throttle path (7) so as to restrain the shaking of the cylinder; while for the high-frequency vibration during the dehydrating process, inflated air is generated actively to reduce the damping force and to absorb the vibration of the cylinder so as to reduce the vibration and noise.

An engine air intake device comprises a collector divided by a partition wall into first and second volume chambers, first and second upstream intake pipe portions, a plurality of first and second downstream branch pipes, and a first communication valve. The first and second upstream intake pipe portions are connected to an upstream side of the first and second volume chambers, respectively. The first and second downstream branch pipes extend from the first and second volume chambers, respectively, to respective intake ports of first and second banks of first and second cylinders, respectively. The first communication valve is mounted to the partition wall in a position that does not interfere with a path of a main flow of intake air inside the collector and configured and arranged to allow communication between the first volume chamber and the second volume chamber when the first communication valve is open.

An ultrasonic endoscope comprises an insertion portion comprising a distal hard portion which has: an endoscopic observation unit; and an ultrasonic observation unit having ultrasonic transducers arranged circumferentially on an outer circumferential section of the distal hard portion, wherein the ultrasonic observation unit comprises an ultrasonic-wave transmission / reception unit having an tunnel-shaped path which has an inner circumferential surface formed as a backing layer; a distal block is arranged on a distal side in an axial direction of the distal hard portion with respect to a location where the ultrasonic-wave transmission / reception unit is arranged, and distal ends of respective members constituting the endoscopic observation unit are fixed to the distal block; and part of the members which constitute the endoscopic observation unit are fitted so as to be partially protruded from an inside diameter of the tunnel-shaped path toward an outer circumferential side thereof.

The invention discloses a power generation device by waste heat of a gas water heater, comprising a condensing gas water heater and a temperature difference power generation system, wherein the condensing gas water heater comprises a combustor, a combustion chamber, a heat-exchange coil, a high-temperature section heat exchanger and a condensing section heat exchanger; the combustion chamber is positioned below the heat-exchange coil; the combustor is positioned below the combustion chamber; the high-temperature section heat exchanger is positioned below the condensing section heat exchanger; the high-temperature section heat exchanger mainly comprises two corrugated plate bundles, a partition plate, a plate box, a water inlet connecting tube and a water outlet connecting tube arranged in a shell; the corrugated plate bundles comprise two metal plates which are oppositely and longitudinally arranged to form a water channel, convex corrugations and concave corrugations are machined on each metal plate, the convex corrugations are bulges machined on the metal plate towards the outside of the water channel; and the distance between the two corrugated plate bundles is 2-6mm. In the invention, the temperature difference between high-temperature fume and sanitary water is used, and thermoelectric conversion is carried out by a temperature difference chip power generation module, thus realizing efficient utilization of the fume waste heat of the gas water heater, and achieving the purposes of energy conservation and environmental protection.

The invention discloses a construction method for pouring an airtight partition wall between a recovered roadway and a reserved roadway. The airtight partition wall is formed by an inner concrete single wall, an outer concrete single wall and a middle loess concrete wall; and the airtight structure is provided with three layers of walls: the inner side and the outer side are respectively provided with the airtight single wall which is formed in a way that a concrete pump pours concrete into a fiber flexible template, and the loess concrete wall filled by loess-based materials is arranged between the two single walls. The flexible templates are made in advance according to design requirements; a slot is drilled on a preset airtight surrounding rock connecting the roadways; anchor rods are constructed in the slot; after the flexible templates are hung onto the slot through a single hydraulic prop or the anchor rods, the concrete is successively poured into the inner side flexible template and the outer side flexible template by a concrete conveying pipe and a pouring opening through the concrete pump to form the inner single wall and the outer single wall; and after the inner single wall and the outer single wall are poured completely, the loess is poured between the inner single wall and the outer single wall to form the concrete airtight wall. The structure is safe and reliable, the construction cost is low, the construction speed is fast, the labor intensity is low, and the requirements of mine production with high production and high efficiency are met.

A threshold-free civil defense door of a doorway comprises door leaves, a doorframe, a lock and a hinge. A sealing beam and a sealing beam lifting mechanism are arranged under each door leaf, and each sealing beam is a turning type sealing beam and comprises a hinge base fixedly connected onto the back surface of the corresponding door leaf, a rocker hinged to the hinge base, a turning beam fixedly connected onto the rocker, a ground sealing member fixed on the turning beam and matched with the ground and a door leaf sealing member fixed on the turning beam and matched with the corresponding door leaf. Each sealing beam lifting mechanism comprises a reversed-L-shaped vertical connection rod, a crank, a shaft base, a bearing, a sealing beam lifting mechanism transmission shaft, a reversing speed changer and a sealing beam lifting handle. The threshold-free civil defense door of the doorway facilitates passing in ordinary time due to the fact that no above-ground threshold is arranged, can be closed in place fast in war so as to achieve functions of protection and closeness, is suitable for protection and closeness of the doorway of civil defense staff and vehicles and has the advantages of being reasonable in structure, convenient to use, easy to operate, flexible to open and close, economic and practical and convenient to maintain.

The invention belongs to the technical field of anti-corrosive paint, provides a super thick film solvent-free hot spray fast dried heavy-duty coating and a preparation method thereof. The component A of the heavy-duty coating comprises 20.0-35.0 of epoxide resin, 3.0-5.0 of reactive diluent, 2.0-5.0 of plasticizer, 0.5-1.5 of foam killer, 1.5-3.0 of thixotropic agent, 0.5-2.0 of wetting dispersant, 20.0-30.0 of inhibitive pigment, 20.0-30.0 of cracking prevention stuffing, and 7.0-18.0 of homemade thixotropy slurry; the component B thereof comprises 40.0-55.0 of firming agent I, 2.0-2.5 of curing accelerator, 2.0-3.0 of thixotropic agent, and 40.0-50.0 of wear resistance pigment. The paint film of the heavy-duty coating has good stopping property, excellent performances of adhesive attraction, high hardness, good wearing resistance, fast surface drying, short hardening time and the like. The heavy-duty coating is suitable for being coated in multiple conditions, can be coated in a streamlined way in the special production line, also can be applicable to minor works, small amount coating; the thickness of the first film forming can reach 1000 mum.

The invention discloses an anti-gravity heat pipe which comprises a pipe shell, a liquid storage device, a shape memory spring, a piston and a working medium, wherein the hot end of the anti-gravity heat pipe is higher than the cold end; the liquid storage device is adjacent to the hot end and serves as a containing space for the working medium and is used for storing the working medium to cool the hot end; one end of the shape memory spring is connected with the hot end and generates thermal contact while the other end is connected with the piston; when the hot end is heated to a threshold, the shape memory spring is heated and deformed and drives the piston to push the working medium to supplement the working medium into the liquid storage device; and when the hot end is cooled to a threshold by the supplemented working medium, the shape memory spring is cooled and recovers to the original state. The anti-gravity heat pipe disclosed by the invention breaks through the capillary limitation, the structure is relatively simple, other auxiliary devices such as an isolator, a liquid storage device and a bubbler are not required, additional power consumption is avoided, external force drive is unnecessary, the heat-into-power conversion efficiency is high, and the drive ability is strong.

The invention relates to a plastic sleeve concrete pile and a construction method thereof. the plastic sleeve concrete pile comprises a cover board, plastic sleeves, pile tips, concrete and sleeve joints, wherein the top of each plastic sleeve is connected with the cover board and the lower part is connected with each pile tip, every two plastic sleeves are connected by the sleeve joint, and the concrete is poured in the plastic sleeves. The construction method comprises the following steps: connecting the prefabricated pile tips with the plastic sleeves, pulling the plastic sleeves together with the pile tips into an immersed tube after lifting the immersed tube at a certain height, starting a plastic sleeve concrete pile driver to drive the plastic sleeves with the pile tips together into the pile length designed depth, lifting the immersed tube after filling water into the plastic sleeves until 1 / 2-2 / 3 of pile length but remaining the plastic sleeves and the pile tips into the foundation, pumping filled water in the plastic sleeves, and pouring a concrete pile body and the cover board into the plastic sleeves to be made into the plastic sleeve concrete pile. The plastic sleeve concrete pile has small soil extrusion action, uneasy broken pile, flexible and rapid construction, easy control of pile body quality, higher bearing capacity of single pile and good cost performance; and the pouring is not influenced by outside.

A process for preparing amino phenylmether from nitro phenylmether mixture by catalytic hydrogenating includes such steps as catalytic hydroreducing reaction between methanol, nitro phenylmether mixture and catalyst, recovering catalyst, decoloring, removing impurities, filtering to obtain liquid phase (the solution of amino phenylmether, methanol and water), separation and refining.

A negative electrode terminal includes an outer terminal of a solid flat rivet shape and an inner terminal of a hollow flat rivet shape. A hollow axle portion of the inner terminal is inserted in a first insulating member, an opening bored in a sealing plate, and a second insulating member so as to be insulated from the sealing plate. A columnar axle portion of the outer terminal is inserted into the hollow axle portion of the inner terminal and crimped thereto, so that a radially bulge-deformed portion is formed in an intermediate portion of the columnar axle portion. The hollow axle portion deforms into a shape matching the radially bulge-deformed portion and is crimped to the columnar axle portion, and its tip is curling-formed to match a curved surface between a brim portion and the columnar axle portion of the outer terminal.

The present invention provides a microbial sample processing device, comprising: a machine body provided with a machine chamber and a sealed movable door; and a sealed housing, a stretchable airbag, a sample tray, a mechanical arm, a bar code scanner, a liquefier, culture dishes, a gas-temperature sensor, and a temperature control device which are arranged in the machine chamber, wherein the sample tray is provided with a plurality of sample seats, the sample seats are used for placing the culture dishes, the liquefier is communicated with the culture dishes, each culture dish is provided with culture plates and a streak-inoculation pen used for streak inoculating the sample in the culture dishes from the liquefier on the culture plate. The microbial sample processing device is reasonable in structure, fast and safe, reliable and efficient, can complete the whole process of mixing and liquefying, streak inoculation, dilution and separation, and incubation of microbial community automatically in a one-stop manner, and can replace manual labor and ensure biological safety.

This invention provides an underground gas plugging coating in coal mine, consisting of an individually packaged liquid material and a powder material in the weight ratio of 0.3 to 0.45: 1; wherein the powder material comprises the following components by weight percentage: 30% to 45% of concrete, 30% to 40% of quartz powder, 5% to 10% of talcum powder, 5% to 10% of flyash, 7% to 13% of aluminium hydroxide, 0% to 4% of magnesium hydroxide, 2% to 4% of ammonium polyphosphate, 1% to 2% of melamine, 1% to 2% of pentaerythritol and 1% to 1.5% of carbon fiber; the liquid material is flexible styrene-acrylate emulsion or flexible pure acrylic emulsion. The coating is characterized by flame retardancy, antistatic property, watertightness, tight bonding with the coal wall and elasticity, further more, can prevent the gas from leaking after being sprayed on the coal wall, and reduce the gas concentration in the laneway.

Disclosed therein is a window of an infrared surveillance camera, which can prevent that the window gets damp even though there is a difference in temperature between the inside and the outside of the surveillance camera due to a long time operation of the surveillance camera. The window includes: an illumination window mounted on a light path in front of an IR LED arranged around a camera module; a first lens window formed separately from the illumination window and mounted on an image introducing path in front of a lens of the camera module; an intercepting member having an assembly face where the illumination window and the first lens window are airtightly and closely combined with each other, the intercepting member being mounted between the illumination window and the first lens window for preventing that infrared rays are introduced from a light irradiation zone, where the IR LED is mounted, to a photograph zone, where the camera module is mounted; a combining ring assembled in front of the intercepting member for simultaneously restricting the illumination window and the first lens window; and a second lens window assembled to the combining ring and spaced apart from the first lens window through the combining ring so that a sealed air layer is formed between the second lens window and the first lens window.