78results about How to "Unique principle" patented technology

The invention provides a negative-pressure liquid nitrogen subcooler and a method therefore for reducing liquid nitrogen temperature. The negative-pressure liquid nitrogen subcooler comprises a liquid nitrogen conveying system, a subcooler system, a negative-pressure air exhausting system and a discharging system, wherein the liquid nitrogen conveying system is used for supplying liquid nitrogen to the subcooler system; the negative-pressure air exhausting system is used for reducing pressure for the subcooler; and the discharging system is used for discharging gasified nitrogen. In the negative-pressure liquid nitrogen subcooler, an electric heater is adopted to raise the temperature of gaseous nitrogen to 20-30 DEG C, so that the subcooler is not limited to the weathers; a liquid level sensor is adopted to automatically regulating the opening of a pneumatic regulating valve, so that the height of the liquid level is maintained. The method comprises the steps of: firstly, injecting the liquid nitrogen for a liquid nitrogen container and regulating pressure; then injecting the liquid nitrogen for the subcooler, wherein the height of the liquid level of the liquid nitrogen in the subcooler is kept constant; then starting the negative-pressure air exhausting system, and cooling the liquid nitrogen through a heat exchanger; and finally, recovering the liquid nitrogen and discharging the liquid nitrogen. According to the invention, the temperature of a heat sink can be further reduced, the temperature of the heat sink is regulatable within a range of 70-77k, and the advantagesof simple equipment, good effect and low operating cost are achieved.

The invention relates to a preparation process of water swellable rubber which relates to the technical field of waterproof materials for concrete road and bridge building and is characterized rubbery being prepared by mixing, milling and vulcanizing natural rubber, a modified starch grafted acrylate copolymer and an additive, wherein raw materials are in the following parts by weight: 10-60 parts of natural rubber, 10-40 parts of modified starch grafted acrylate copolymer, 0.3-3 parts of sulfur, 1-2 parts of vulcanization accelerator, 1-5 parts of zinc oxide and 0.5-2 parts of stearic acid. The preparation process is simple and has unique principle; and a prepared product has better elasticity, strength and extensibility, particularly has water swelling property, higher swelling rate and good water preventing and stopping effects and simultaneously has corrosion resistance to organic solvents, such as acid, alkali, salt, oil and the like, superior aging resistant performance, no flow at high temperature, no embrittlement cracking at low temperature, long service life, convenient construction, lower cost, no toxicity, no pollution and wide application range.

The invention provides a bactericide composition and a production process thereof. The bactericide composition comprises the following components according to mass percent: 10-40% of difenoconazole, 10-40% of azoxystrobin, 1-6% of dispersant, 1-3% of wetting agent, 0.5-2% of chelating agent, 1-5% of texturing agent, 3-5% of humectant, 0.05-0.1% of proteolytic enzyme and the balance of fillers. According to the bactericide composition provided by the invention, a new formula concept is introduced by researching the mechanism of action of the bactericide, the special texturing agent, the chelating agent and the proteolytic enzyme are screened to form a polymer membrane on a target surface, and active molecules are embedded in the polymer membrane, so that the active molecules are controlled to be slowly released so as to avoid phytotoxicity caused by excessive penetration; a proper amount of selective proteolytic enzyme damages plant pathogenic bacteria to facilitate the absorption of bactericidal active ingredients; the principle of the formula is unique, and meanwhile, the production and processing steps are simple and the properties are stable, so that the bactericide composition is suitable for industrial production.

The invention provides a method and device for automatically calibrating micro-ammeters, which relate to the technical field of micro-ammeter calibration equipment. The method comprises the following steps that: firstly, through using a precision voltage source and a standard resistor, a voltage-current curve is obtained through measurement by using a precision ammeter; then, through using the precision voltage source, a voltage-current curve is obtained through measurement implemented by an ammeter to be calibrated; through data fitting, the parameters of the two curves are obtained; and through coefficient correction, the curve of the ammeter to be calibrated is close to that of a standard ammeter as far as possible. A hardware part of the device provided by the invention mainly comprises a computer, a precision voltage source, a standard resistor, a conversion module, a precision ammeter and an ammeter to be calibrated. By using the method and device provided by the invention, the test accuracy of a micro ammeter can be greatly improved, even close to that of a precision electrometer-level ammeter; the method is simple and reasonable, unique in principle and high in accuracy; the device is simple in structure and stable in performance; and the test accuracy requirements of the micro ammeter used in a depolarized relaxation current test for the insulation performance of high voltage equipment can be satisfied.

The invention provides a fiber grating self-compensating strain transducer manufactured by adopting an online molding process, relating to the technical field of temperature transducers. A compensating device is composed of a part B and a solid body which are connected in series, wherein, the solid body is manufactured by adopting the online molding process for embedding and fixing the whole fiber grating in the solid body, and at least one of the cross-sectional area and thermal expansion coefficient of the part B and the solid body is different from each other. The strain transducer has the positive effects that: when the environmental temperature rises or falls, the automatic compensation to grating wavelength temperature drift can be realized by the effect of stress deformation, with precision compensation and good working stability; moreover, the strain transducer also has the advantages of small size, low cost, easy processing, good working stability, convenient use, stability and reliability, and long service life; the molding process of the strain transducer is simple and convenient, the compensation performance can be guaranteed to be reliable, and the problems that grating adhesive process has easy creep deformation, easy aging, unreliable grating combination, short service life and the like in the prior art are solved.

The invention discloses a cuttage seedling raising method for twigs of ilex chinensis Sims. According to the method, nursery stocks of ilex chinensis Sims are bred by utilizing the cuttage of the twigs of fruiting ilex chinensis Sims, the genetic characteristics of excellent mother plants of ilex chinensis Sims can be kept, and rapid breeding and cultivation of ilex chinensis Sims are achieved. The method comprises the steps of selection of mother trees, management, protection and cultivation of the mother trees, collection of cuttings, treatment of the cuttings, cuttage of the cuttings, infusion feeding for scions and management after cuttage, wherein the robust and disease-free fruiting nursery stocks are used as the mother trees, a cutting orchard is established, the twigs are cut for sprouting promotion, semi-lignified branches are selected as the cuttage scions, the cuttings are subjected to rooting-promotion and non-destructive treatment, the scions are supplied with nutrients invitro after cuttage, through tests, the rooting survival rate of the cuttings is 96%, and a large number of nursery stocks of ilex chinensis Sims can be quickly bred. The unique methods and structures of pretreatment of the scions and infusion feeding for the scions are critical, the problem of difficult breeding of seeds of ilex chinensis Sims is solved, the breeding speed is high, and the method is simple.

The invention relates to a method for pre-warning snow disaster in a pasturing area. The method comprises the steps of: collecting and analyzing data and information of disaster inducing capacity of accumulated snow in the pasturing area, disaster resistance in the pasturing area, livestock supporting body and weather forecast; constructing a pre-warning index system and a pre-warning diagnosis model for pre-warning snow disaster; constructing a snow disaster pre-warning grading model and a snow disaster pre-warning grading standard by combining the weather forecast; carrying out pre-warning grading on the snow disaster; checking and correcting the snow disaster pre-warning grading model and the snow disaster pre-warning grading standard; and integrating the established snow disaster pre-warning grading model and standard with a snow disaster danger level model and standard into a multi-source information integration pre-warning system, and issuing pre-warning information, risk management and pre-warning decision plans through the multi-source information integration pre-warning system. The method realizes a grid unit-based spatial snow disaster distribution map and a county region unit-based snow disaster danger degree division map, and also realizes dynamic pre-warning of dynamic spatialization.

The invention discloses a floating type intelligent gate opening and closing device. The floating type intelligent gate opening and closing device is characterized by comprising two railways (2) which are arranged on the lower portion of a dam face (1), the railways (2) are provided with a gate (3), the middle of the top end of the gate (3) is connected with a gate opening rope (17), after the gate opening rope (17) sequentially penetrates through a first fixed pulley (4) which is arranged at the top end of the dam face (1) and the a moving pulley (5) which is arranged between the first fixed pulley (4) and the top ends of the railways (2), one end of the gate opening rope (17) is fixedly connected with a dam bottom (6), and after the other end of the gate opening rope (17) penetrates through a second fixed pulley (7) which is arranged at the dam bottom (6), the other end of the gate opening rope (17) is connected with a gate opening air bag (8). According to the floating type intelligent gate opening and closing device, the perspective of the innovative design is unique, the theory is simple, and the device is convenient to manufacture and use. The floating type intelligent gate opening and closing device is suitable for medium and small size guardless reservoirs in mountain areas, and also suitable for other hydraulic structures with gate opening and closing.

The invention relates to a user-friendly intelligent blind person teaching piano. The user-friendly intelligent blind person teaching piano comprises a body provided with a piano body and piano keys;induction sheets are arranged on the surfaces of all the piano keys; a teaching board is further arranged on the front portion of a panel of the piano keys, and two sets of teaching modules are installed on the teaching board; the teaching modules comprise slide grooves formed in the teaching board, and teaching bases are slidably arranged in the slide grooves; the user-friendly intelligent blindperson teaching piano further comprises two driving cylinders arranged at the two sides of the teaching board, a conveying belt is arranged between the two driving cylinders in a sleeving mode, and the teaching board is fixedly connected with the conveying belt; a computer control board is installed in the body; the user-friendly intelligent blind person teaching piano further comprises teaching gloves, prompting units are arranged at the finger ends of the teaching gloves, and the teaching gloves are further provided with processing chips in wireless connection with a computer control board.The user-friendly intelligent blind person teaching piano is novel in structure and unique in principle, a user can be assisted in efficiently and accurately plucking the piano and learning the piano,the study difficulty is lowered, and the study interaction is improved.

The invention provides a pair of myopia prevention and treatment glasses for controlling a head position and a sitting posture, and relates to the technical field of glasses for correcting the bad sitting postures of students and preventing and treating the myopia of the students. The glasses are provided with a posture correction watching region and non watching regions, wherein the posture correction watching region is a through hole or a lens; the posture correction watching region is positioned on the lower part and/or the upper part of a horizontal vision line of a glasses frame; the nearest distance between the posture correction watching region and the horizontal vision line of the glasses frame is 0-22 mm; and other regions are the non watching regions. A wearer develops good learning and working eye-utilization habits by controlling the head position and the sitting posture, so that extremely good effects of suppressing, recovering and preventing the myopia can be achieved; bad postures such as wryneck, head drop, lookdown, strabismus and crouch down of the wearer can be well corrected; and multiple cervical vertebra relevant diseases can be prevented. The myopia prevention and treatment glasses are simple in structure and convenient to use, do not need any accessory devices, can prevent and treat the myopia and have a good effect and quick response. The myopia prevention and treatment glasses are particularly suitable for prevention, treatment and correction for the myopia of the youth.

The invention relates to a pair of anti-hazing swimming goggles. The pair of anti-hazing swimming goggles comprises a goggles frame, lenses and a bandage, wherein heat-conductive layers are covered onthe peripheral edges of the lenses, and heating layers are coated on the peripheral walls of the heat-conductive layers; heat-conductive films are buried in the lenses; a sliding groove is formed ineach frame edge of the goggles frame; a reset cavity is arranged in one end of each sliding groove; reset sliding plates are slidingly arranged in the reset cavities; the reset sliding plates are connected to base plates of the reset cavities by virtue of reset springs; driving cavities are arranged in the other ends of the sliding grooves; driving plates are slidingly arranged in the driving cavities; stream guidance holes are formed in the outer end faces of the driving cavities; friction rods are slidingly arranged in the sliding grooves; and the friction rods closely fit to the heating layers. The pair of swimming goggles is novel in structure and unique in principle; and the pair of swimming goggles is capable of intelligently and automatically removing halitus in the lenses, guaranteeing clear viewing field and effectively improving a swimming experience.

The invention discloses a pressure sensor, comprising an outer shell (3), a screw cap (4), a taper thread (5), a metal wiring connector (1) and an insulation casing (2); a digital micro-processor is arranged in a pressure sensor (6); a program processing module is used to collect, process and output the pressure signals; a sensing element of the pressure sensor (6) is a pressure-sensing micro-chip; and the pressure-sensing micro-chip is connected with the digital micro-processor through a signal circuit. The invention also discloses a manufacturing method for the pressure sensor. Compared with the prior art, the pressure sensor has the advantages of high precision, high reliability, long service life, corrosion resistance, low cost and high cost performance and has no mechanical componentcontact.

The invention provides a sealed structure of a rolling piston compressor or an engine, and relates to the technical field of rolling piston compressors and engines. The sealed structure comprises a cylinder body and a slide block. A power main shaft is provided with a sliding eccentric wheel, and the outside of the sliding eccentric wheel is provided with a rolling sleeve. The sealed structure ismainly characterized in that the sliding eccentric wheel is provided with a radial chute, and the radial chute and sliding surfaces on two sides of the power main shaft are in radial sliding fit; anda clearance is formed between the power main shaft and the top of the radial chute, and the sealed structure is provided with an oil guide structure for connecting the clearance and a hydraulic device. The sealed structure overcomes the defects of the prior art, has the characteristics of unique principle, compact structure and good sealing performance, can greatly increase the efficiency of the compressor or the engine, saves energy, is flexible and convenient to use, and can be widely used in an air compressor, an air conditioner, a refrigerator and a rolling piston engine.

The invention relates to an electric kettle capable of achieving complete boiling. The electric kettle comprises a plug, a kettle body, a cover, a heating plate and a temperature control piece and ischaracterized in that the cover is provided with an exhaust vent; the heating plate, the temperature control piece and the plug are sequentially serially connected; the bottom of the kettle body is provided with a support rack, the heating plate is mounted on the lower portion of the support rack, and the temperature control piece is mounted on the upper portion of the support rack; a thermal insulation layer is arranged between the heating plate and the temperature control piece; a heating area is formed between the support rack and the bottom of the kettle body, a mixing area is formed between the support rack and the top of the kettle body, and a convection channel is formed between the support rack and the lateral wall of the kettle body; the width of the convection channel is smallerthan the height of the heating area. The electric kettle is novel and unique in structure, capable of guaranteeing that water in the kettle body completely reaches 100 DEG C, and capable of effectively preventing 'false boiling' so as to sterilize bacteria and improve water quality.

The invention relates to an improved nasonry knife comprising a knife plate and a knife handle. Transmission rollers are embedded into the knife plate and are parallel to the bottom edge of the knifeplate, and a transmission belt is mounted between the two transmission rollers and exposed from the two sides of the knife plate. A material collecting hopper is fixedly arranged on the plate face ofone side of the knife plate, and driving devices are mounted on the plate face of the other side of the knife plate and each comprise a driving belt, a wall face wheel, a plate face wheel and an adjusting wheel. A wheel shaft of each wall face wheel is connected to a wheel shaft of the corresponding plate face wheel through a support rod, and a limiting device is arranged between each support rodand the knife plate. The support rods are further provided with adjusting rods in a shaft-connection mode, and the adjusting wheels are arranged at the ends of the adjusting rods. The wall face wheels, the plate face wheels and the adjusting wheels are sleeved with the driving belts. The improved nasonry knife is novel in structure, convenient to operate and capable of ensuring the even thicknessof a cement layer and effectively improving the construction efficiency; and meanwhile it can be ensured that construction is clean and safe.

The present invention relates to a glass steel bowl and the manufacturing technique and manufacturing equipment thereof. The manufacturing technique comprises the following procedures: pectin cavity block which is of a shape corresponding to that of that of the bowl is arranged inside a rigid rotating bowl tightly; prepared mixture of fibre glass and resin is added into the pectin cavity block; at the same time, the rigid rotating bowl is driven to rotate; rotating speed of the rigid rotating bowl is controlled to distribute the mixture in the inner side of the pectin cavity block evenly and solidify gradually; after the mixture is solidified fully, rotation of the rigid rotating bowl is stopped; the pectin cavity block is taken out from the rigid rotating bowl and opened; the solidified mixture is taken out, obtaining the required glass steel bowl. The glass steel bowls produced by the glass steel bowl manufacturing technique and the equipment of the present invention has good temperature resistance and wear resistance and small deformation and can ensure production quality of electronic aluminum foils and meet requirement of high-performance of aluminum foil products effectively.

The invention provides intelligent wet-type dust removal equipment which comprises an air outlet, a rear shell, a sewage port, a front shell and an air inlet, the rear shell is connected with the front shell, a gutter channel is installed at the lower end of the rear shell and the lower end of the front shell, the sewage port is installed at the lower end of the gutter channel, a cyclone flow guide body is installed in the rear shell, and the air outlet is formed in one end of the rear shell. A driving device, a swirler and a fan impeller are respectively mounted in the front shell, the swirler is mounted on the driving device, the driving device is connected with the fan impeller, a temperature sensor is mounted on the driving device, an air inlet is formed in one end of the front shell, a dust detection module and a spraying system are respectively arranged on the air inlet, and an electric control water valve is mounted on the air inlet; the electric control water valve is connected with the spraying system through a pipeline, and the pipeline is provided with a flow sensor; the equipment is reasonable in structure, free of consumables, free of a cleaning period, high in trapping and self-cleaning capacity, capable of continuously working for a long time, free of blockage, free of disassembly, cleaning and maintenance, simple in structure and convenient to use.

The invention relates to a method for predicting the degree of damage of a pasturing area snow disaster to animal husbandry. The method comprises: designing snow disaster damage generation elements ofthe pasturing area according to spatial distribution of damage of snow disasters to animal husbandry; establishing a diagnosis model of snow disaster damage according to the supply and demand relationship of forage grass in winter and spring (the snow disaster period); predicting the degree of the damage of the pasturing area snow disaster to the animal husbandry; and taking targeted preventive measures according to a damage degree prediction model and a grading standard as well as the forage grass reserve in the snow disaster period estimated through a forage grass reserve estimation model for dealing with disasters. According to the method, the loss and prevention cost of the animal husbandry caused by the snow disaster in the pasturing area can be greatly reduced, the spatial visualization of the production damage degree of the animal husbandry caused by the snow disaster in the pasturing area is realized through the snow disaster, and a scientific basis is provided for guiding thepasturing area to reduce damage. According to the method, the prediction workload is greatly reduced, the prediction precision is improved, and the practicability is high.