252results about How to "Small water resistance" patented technology

The invention discloses a sintered water permeable brick and a preparation method thereof, and belongs to the technical field of sintered ceramics. According to the water permeable brick, structural pug in a surface layer is composed of, by weight, 45-65% of structural fine aggregates, 20-30% of plastic high-temperature binders and 15-25% of water, pore forming pug in the surface layer is composed of, by weight, 20-50% of pore forming agent aggregates, 45-80% of plastic pore adding binders and 0-5% of biomass fuel internal combustion catalysts, and a blank of a secondary surface layer is composed of, by weight, 70-75% of coarse structural aggregates, 10-15% of plastic high-temperature binders, 0-5% of pore adding agent coarse aggregates and 10-15% of water. A blank of the surface layer and the blank of the secondary surface layer are prepared firstly, the blank of the surface layer contains the orderly distributed structural pug and the pore forming pug, and then single-shaft extrusion forming, drying and sintering are conducted to obtain the water permeable brick. The water permeable brick has high water permeable rate, high strength, high abrasion resistance and durability and is a paving material with excellent ecological and environmental functions.

A method is provided which uses an improved emulsion to imparting water-resistance to gypsum products. In one embodiment, gypsum products comprise calcium sulfate dihydrate and an emulsion which comprises a saponified wax, a nonsaponifiable wax, an alkyl phenol, a surfactant/dispersant salt of polynaphthalenesulfonic acid, and carboxymethylcellulose. Optionally, the emulsions may contain a preservative, e.g., a biocide (mildewcide, fungicide, etc.). These gypsum products resist the uptake of water and therefore resist biological infestation without addition of a preservative.

Water-cooling arrangement includes stator cage and cooling water channel. Cooling water channel in stator cage is arranged in axial direction inside stator cage in not helical round about manner. The cooling water channel can be as single circuitous water channel, or a combination formed from multiple circuitous water channels. Each pair of water channel possesses a cooling water outlet and a cooling water inlet. The cooling water outlet and a cooling water inlet can be arranged at axial same side of stator cage, or arranged at different sides. Water outlets and water inlets of multiple water channels can be arranged in same direction or in reversal directions. Circuitous water channels are in reversal directions can reduce temperature gradient at different parts of the stator cage further.

A low-density (200-550 Kg/cu.m) board is prepared from rice and wheat straws and the adhesive which is the mixture of isocyanate resin and urealdehyde resin or phenolic resin through pretreating, applying adhesive and hot pressing.

The invention discloses an automatic constant-temperature water mixing valve. The water mixing valve comprises a valve body, a temperature sensing rod, a work spring, an adjusting screw rod and a tempering knob, wherein the valve body is provided with a hot water inlet, a cold water inlet and a mixed water outlet; the tempering knob is connected with the adjusting screw rod; a valve plug is arranged in the valve body; the middle part of the valve plug is movably matched with the inner wall of the valve body; the upper part of the valve plug is positioned at the inner end of the cold water inlet; the lower part of the valve plug is positioned at the inner end of the hot water inlet; the valve plug is provided with an axial through hole; the temperature sensing rod is fixedly connected to the lower part of the valve plug; the upper part of the temperature sensing rod is positioned in the cavity of the valve plug; a water mixing ring and the work spring are sleeved on the lower part of the temperature sensing rod; the lower end of the work spring is pressed against the inner wall of the valve body; the top rod of the adjusting strew rod can be pressed against the upper end of the temperature sensing rod; the valve body is in threaded connection with a large end cover; the adjusting strew rod is in threaded connection with the large end cover; the large end cover is also in threaded connection with a small end cover; and a buffer spring is arranged in the blind hole of the adjusting screw rod. The water mixing valve has the advantages of low water resistance and high reaction sensitivity.

The invention relates to an inverter integrated into a motor. The inverter is characterized in that the inverter is integrated into the rear side of the motor; the bearing of a reducer output shaft is arranged on the inverter; a wire connector, a DC busbar, and a Y capacitor are arranged below a DC bus capacitor; the wire connector is installed on a main box; an air conditioner fuse is fixed to the embedded nuts of the wire connector; one end of the air conditioner fuse is connected with the negative extension end of the DC busbar; the other end of the air conditioner fuse is connected with the negative wire harness of an air conditioner connector; the DC busbar is electrically connected with the terminal of a DC connector and is connected with one end of the air conditioner fuse and the positive wire harness of the air conditioner connector at the wire connector. The inverter can be well integrated with the motor and the reducer, and the entire integrated device occupies small space as much as possible. Further, the inverter is compact in structure, low in cost, high in power density, and simple and reliable in cooling design.

The invention discloses a fuel cell thermal management system with phase change heat storage and preheating functions. The fuel cell thermal management system comprises a heat pipe heat exchange part,a liquid path preheating loop, a liquid path heating loop, a gas path preheating loop and a gas path heating loop, wherein the heat pipe heat exchange part is embedded into a heat pipe in a polar plate to exchange heat with an external liquid path, a first phase-change heat exchanger is connected with a liquid path, a second phase-change heat exchanger is simultaneously connected with a gas pathand the liquid path, the liquid path preheating loop heats the liquid path through the first phase change heat exchanger, the gas path preheating loop heats the gas path through the second phase change heat exchanger to jointly preheat a fuel cell, waste heat of a fuel cell in the liquid path heating loop accumulates heat for the phase change heat exchanger or heats a lithium battery and a passenger compartment, the gas path heating loop indirectly heats inlet gas through cooling liquid. The fuel cell thermal management system is advantaged in that the waste heat of the fuel cell can be storedin the phase change heat exchanger and used for preheating the fuel cell through a liquid path and a gas path or for heat preservation of the fuel cell, in addition, the waste heat of the fuel cell can heat intake air, a lithium battery or a passenger compartment, and the energy utilization rate is increased.

The invention discloses a fishing message indicator, which comprises a floating body, a control rod and an elastic line pressing set, wherein the floating body is provided with a groove and a perforated hole; the bottom surface of the groove is provided with a first accommodating groove and a second accommodating groove; the perforated hole penetrates through the floating body and passes through the first accommodating groove and the second accommodating groove; a fishing line can penetrate through the perforated hole; the control rod is combined with the floating body, can swing in the groove and is provided with a convex part; the convex part is provided with a through hole through which the fishing line can pass; the elastic line pressing set is arranged in the first accommodating groove and is driven by the control rod to press the fishing line when the control rod swings to the convex part to be on the outer side of the second accommodating groove, meanwhile, elastic force is produced to position the control rod; the elastic line pressing set releases the fishing line when the control rod overcomes the elastic force of the elastic line pressing set to swing to the convex part to be in the second accommodating groove and the through hole is just opposite to the perforated hole; and thus, fishing message can be transferred excellently and water resistance is reduced to facilitate fish fighting after a fish gets hooked, and fishing of a fisherman can be facilitated when the fish is pulled out of a water level.

The invention provides a waterborne flying ship which comprises a streamline shaped ship body, a power driving device comprising a centrifugal turbine, a high-speed running balance system and a rudder, wherein the centrifugal turbine is arranged at the lower part of the ship body; and turbine blades are arranged and fixed on the outer edge of a turbine hub and downwards extend to be exposed below the ship bottom. The waterborne flying ship can fly forward on water at an extremely high speed, reaction force of positive pressure is applied to the water surface by utilizing the centrifugal turbine, and the ship body is lifted up out of the water surface by utilizing the component force of the force in the upwards vertical direction, so that the ship body is separated from the water surface; and moreover, the component force of the centrifugal turbine, which is applied to the water surface in a horizontal forward direction, is basic power for driving the ship to run at a high speed. The contact area of the ship with the water and the resistance acting on the ship are obviously reduced, the running speed is greatly increased, and a high-speed, rapid and economic waterborne means of transport is provided for people.

The invention provides a manufacturing method of granulated gel and coating composition formed of the granulated gel obtained from the manufacturing method combined with coating film forming ingredient. The granulated gel manufacturing method comprises bringing aqueous liquid compound including waterborne resin, colorant and water-soluble polysaccharide into contact with water medium containing metal compound, characterized in that organic acid metal salt serves as a component part of the metal compound.

The present invention relates to a water engine machine capable of extensively and fully utilizing natural water flow energy source. Its technical scheme is characterized by that a light high-sensitivity hydraulic turbine is mounted on the floating table or seat table, said whole machine can be floated or fixed in the water toward water flow, then the hydraulic turbine can be rotated so as to obtain the low-cost green energy source.

The invention provides modified kieselguhr of which the tap density is 450-490 kg/m<3> and a preparation method thereof. The method comprises the following specific steps: acquiring kieselguhr; and adding sodium carbonate into the kieselguhr, heating, then activating at a high temperature of 900-1100 DEG C, and crushing. The modified kieselguhr provided by the invention has the characteristics of high whiteness, low tap density and high strength and has favorable adsorption property and heat-insulating property. Besides, the invention also provides an indoor decorative material containing the modified kieselguhr of which the tap density is 450-490 kg/m<3>, calcium hydroxide, sepiolite and film-forming assistant, and provides a preparation method thereof. The material is low in organic substance content, is nonvolatile, has high whiteness, low tap density and high strength, and ensures that the material can not volatilize harmful gas while ensuring favorable adsorption property and heat-insulating property, thereby being safer and more environment-friendly.

The present invention proposes a finned tube main heat exchanger for a gas heating water heater, which includes a collector, a heat exchange flat tube and fins, and the collector includes two water boxes separated by a heat exchange body section The two ends of several heat exchange flat tubes are respectively inserted into the heat exchange flat tube sockets of two water boxes to connect with the current collector. There is a partition plate in the water box, and the heat exchange flat tubes pass through the fin perforations and connect with several The fins are connected, the heat exchange body area is covered with fins, the collector has a water inlet and a water outlet, and is respectively connected to the water inlet joint and the water outlet joint; the heat exchange flat tube is a single-channel straight tube, and its cross-sectional size is 2 to 6 ×10~30mm, at least 10 heat exchange flat tubes are arranged in parallel. 1) The heat exchange tube per unit mass of the present invention has a large heat exchange area, and the heat exchange efficiency of the main heat exchanger is high. 2) The main heat exchanger has a highly compact structure and light overall weight, which can save a lot of material costs. 3) The water resistance and pressure loss of the main heat exchanger are small. 4) The main heat exchanger has the characteristics of simple manufacturing process, easy manufacturing, and low manufacturing cost.

The present invention provides a method of preventing adhesion of aquatic organisms on structures in the water such as ships. In the method, the underwater part of a structure in the water is covered up with the sheet. The sheet is made of a polyolefin and less than 1 mm thick, and has apertures each of which has a surface area of 1 to 60 mm2, the surface area in total of the apertures occupying 20 to 80% of the entire surface area of the sheet. The sheet has a tensile strength of 15 to 37% as measured under JIS L1096A and a tear strength of 3 to 9 kg as measured under JIS L1096A-1.

The invention discloses a system for cleaning with rubber balls, which comprises a first ball storage device, a ball charging device, a second ball storage device and a rubber ball collecting device, wherein the first ball storage device is provided with a first space with balls, a first space without balls, a ball inlet connecting pipe, a ball outlet connecting pipe, a water inlet connecting pipe and a water outlet connecting pipe, the ball inlet connecting pipe, the ball outlet connecting pipe and the water inlet connecting pipe are connected with the first space with balls, and the water outlet connecting pipe is connected with the first space without balls; the ball charging device is arranged on an input pipeline and used for charging rubber balls in the first space with balls into a device to be cleaned; the second ball storage device is provided with a second space without balls, a second space with balls, a feed connecting pipe, a discharge connecting pipe and a water discharge connecting pipe, the feed connecting pipe and the discharge connecting pipe are connected with the second space with balls, and the water discharge connecting pipe is connected with the second space without balls, and the rubber balls inside the second space with balls can be allowed to enter the first space with balls; and the rubber ball collecting device is used for collecting the rubber balls discharged by the device to be cleaned and allowing the rubber balls to enter the second space with balls. In the system for cleaning, disclosed by the invention, the service lives of the rubber balls and a water pump are long, the water resistance of the system is small, and the energy-saving effect is obvious.

The invention provides flame-retardant high-temperature-resistant irradiation-resistant silicone rubber. The silicone rubber comprises the following components, by mass, 100 parts of raw methyl phenylvinyl silicone rubber, 10-60 parts of raw methyl vinyl silicone rubber, 1-10 parts of polyorganometallosiloxane, 2-10 parts of a structured control agent, 20-70 parts of fumed silica, 0.5-5 parts ofhigh vinyl phenyl silicone oil, 0.1-5 parts of a nanometer heat-resistant agent, 1-5 parts of nanometer radiation-resistant particles, 5-60 parts of a heat-resistant modified additive, 1-5 parts of aheat-resistant modified nitrogen flame retardant, 0.005-1 part of a platinum complex and 0.5-3.0 parts of a vulcanizing agent. The invention further provides a preparation method of the flame-retardant high-temperature-resistant irradiation-resistant silicone rubber. According to the flame-retardant high-temperature-resistant irradiation-resistant silicone rubber and the preparation method thereof, the prepared silicone rubber has very good high temperature resistance and irradiation resistance, is low-smoke, halogen-free, flame-retardant and water-resistant, and can be used as a nuclear powercable insulating material.

The invention discloses a vacuum low-level normal pressure device for soft soil foundation reinforcement treatment. The device comprises a drainage well and a tube arranged in the drainage well, wherein the bottom of the drainage well is coated with a filter membrane, and extends into a soft soil foundation base course; the drainage well is connected to a vacuum pump and a booster pump respectively, and provided with a changeover valve so as to communicate with the vacuum pump or the booster pump selectively, and the tube is provided with a check valve; when the water level of a soft soil foundation is relatively high, the booster pump is communicated with the drainage well through controlling the changeover valve; the drainage well is pressurized internally to discharge underground water outside through the tube, so that the water resistance in the drainage well is reduced greatly; the well resistance of the filter section of the drainage well can be overcome while pressurizing for drainage; the well resistance effect can be reduced effectively so that the drainage well drains water smoothly.

The invention relates to an elastic overflow weir. The bottom edge of a weir plate is hinged on a fixed base, a sealing rubber sheet is arranged at the hinged part of the weir plate and the fixed base, the upper surface of the weir plate is of an arc surface, the sensitivity is high, the overflow resistance is low, the overflow rate is fast, and the overflow amount is larger, the closure effect is stable, and the water discharge of large quantity is realized; the back surface of the weir plate is linked with at least a cluster spring fixed on the fixed base, thus, the overflow weir is enabled to have simple outline structure, the parts are reduced, the assembly and the maintenance are convenient, the overflow weir is not limited by the landform, the rise and the fall of the weir plate are stable, and the overflow weir of 1 meter width can be used for replacing a fixed weir of 8 to 15 meter width.

The invention relates to an underwater joint search and rescue robot and system and a working method thereof. The underwater robot comprises a body and a processor module, wherein a power device is arranged on the outer wall of the body, and a mechanical arm is arranged at the head end of the body; the processor module is used for controlling the underwater robot to advance by controlling the power device and used for controlling the mechanical arm to grab; a clamping end is arranged at the tail end of the body. The underwater joint search and rescue robot and system and the working method thereof have the advantages that multiple underwater robots are connected end to end to form a queue, the queue advances underwater, water resistance during advancing is reduced, the electric energy consumption during advancing is lowered, and the operation cycle of the underwater robot is prolonged; a three-stage substep closing manner is used to overcome complex underwater conditions, wide working range is achieved, and the underwater robots can converge under different distances by the aid of three communication manners.

The invention discloses a cross-medium sea-air amphibious unmanned aerial vehicle. The unmanned aerial vehicle comprises an aerial flight mechanism and an underwater submerging mechanism; the air flight mechanism comprises a coaxial reverse propeller lift structure for providing lift and a steering engine tilting platform control structure for controlling the attitude of an aircraft; the underwater submerging mechanism comprises a posture-gravity center adjusting structure for achieving switching between a horizontal posture and a vertical posture of a vehicle body, a posture tail vane adjusting structure for achieving underwater motion posture adjustment and an underwater power structure for providing underwater submerging power; and the coaxial reverse propeller lift structure, the steering engine tilting platform control structure, the posture-gravity center adjusting structure, the posture tail vane adjusting structure and the underwater power structure are coaxially arranged in sequence from top to bottom. The whole unmanned aerial vehicle is designed in a streamline mode, the bamboo dragonfly type unmanned aerial vehicle and the underwater AUV are perfectly combined, and a brand-new sea-air amphibious unmanned aerial vehicle type is formed.