189results about How to "Overcome stress" patented technology

This invention discloses a sort of air condition system which can store up cold air and circulate by itself it consists of the indoor set A and the indoor set B, in the indoor A the bottom outlet of the inner tubule of the bushing evaporator which is used to store up cold air connects with the inlet of the heat transfer coil pipe. The inlet of the heat transfer coil pipe connects with the top outlet of the inner tubule of the bushing evaporator which is used to store up cold air. It has the medium for storing up cold air in the trough for storing up cold air; the heat transfer coil pipe for storing up cold air which is full of heat transfer medium in its bosom immerges in the trough for storing up cold air, the indoor set connects with the inlet of the trough for storing up cold air respectively by the electromagnetic clique and the evaporator for the air condition. The evaporator for the air condition and the trough for storing up cold air all connect with the inlet of the circle pump by the electromagnetic clique. The inlet of the circle pump connects with the he indoor set A. Its density for storing up cold air is high than the system for storing up cold air used the water in storing up cold air and offering cold air. It can leave out the circle system which has the carrying cold dose during the low temperature in storing up cold air.

The invention discloses a modified polypropylene non-woven fabric, its preparation method and application. The preparation method comprises: impregnating a polypropylene non-woven fabric in a grafting solution containing a graft monomer, a crosslinking agent, a non-ionic surfactant and a photosensitizer, and initiating graft polymerization under ultraviolet irradiation, thus obtaining the modified polypropylene non-woven fabric, which can be widely used in adsorption separation treatments of dye wastewater, heavy metal ion wastewater, inorganic anion acid radical-containing chemical wastewater and the like as a filtering material. The modified polypropylene non-woven fabric provided by the invention has the characteristics of high mechanical strength, large water flux, and great saturated adsorption capacity. Meanwhile, after being subjected to a regeneration treatment in a cationic surfactant-containing ethanol solvent desorption solution, the adsorbed filtering material can be recycled.

The present invention relates to a partial corrugated steel web prestressed steel-concrete continuous composite box-girder. The concrete roof plate is permanently connected with the steel box-girder through a connecting plate and a shear connector. In the steel box girder the steel diaphragm plates are installed respectively corresponding to each fulcrum. The whole steel box-girder is composed of a structural negative monument area segment and the structural positive moment area segment arranged at two ends. The concrete roof plate of the structural negative moment area segment is stretched with a longitudinal prestressed rib. A longitudinal stiffening rib is arranged in the steel baseboard. The web plates at two sides of the steel box-girder in the structural negative moment area are corrugated steel webs. The web plates of the steel box-girder in the structural positive moment area steel box-girder are plane steel web plate. The invention can overcome the problems of low efficiency of longitudinal pre-stress of negative moment area in the continuous composite box-girder and corrugated steel web PC composite box-girder, easily destabilization of the plane steel web plate or more arrangement of the longitudinal prestressed rib inside or outside the box-girder and complex construction and the like. The invention has broad applying prospect in the bridge engineering and long-span structure.

The invention relates to a preparation method of composite film layers and a method of using the same to remove tetracycline residue in pharmaceutical wastewater. The method is characterized by comprising: making GO (graphene) into GO solution, dissolving zinc nitrate and 2-methylimidazole respectively in methanol, mixing, adding the GO solution quickly into the mixed solution, stirring well, centrifuging, washing, drying to obtain ZIF-8 (zeolitic imidazolate framework)/GO composite powder, ultrasonically treating the composite powder to obtain a suspension, and binding the dispersed ZIF-8/GOsuspension and polyetherimide-modified microporous filter film by means of vacuum suction filtering to form ZIF-8/GO composite film layers different in thickness; using a vacuum suction filter to passpharmaceutical wastewater through the above composite film layers, and performing suction filtering repeatedly; tetracycline in the tetracycline is removed to 88.9-95.5%; the preparation method of the composite film layers and the method of using the same have the advantages that operations are simple, the cost of raw materials is low, recycling is facilitated, and the materials are reusable.

The invention discloses a manufacture method of a multilayer gradient nano-composite diamond film of the surface of die steel. The manufacture method includes that a plunger undergoing conventional pretreatment is arranged in a vacuum system of a magnetron sputtering composite vapor deposition system, and multiple layers of gradient films are sequentially deposited. Each layer of the multiple gradient transition layers undergoes high-temperature annealing treatment and argon ion surface etching treatment so as to improve binding force of the films and a base. The defects of high internal stress and poor adhesive force and the like of a conventional diamond film on the surface of the mold steel are overcome.

The invention relates to the technical field of preparation and repair of sliding bearing Babbitt metal anti-friction layers. The novel cold spraying technology is introduced into manufacturing and repair remanufacturing of a Babbitt metal sliding bearing bush lining anti-friction layer, atomization powder feeding is adopted to obtain coating microstructures with uniform components and fine dispersely-distributed and uniformly-dense crystal grains and second phases through cold spraying, and the good interface bonding characteristic is obtained through tinning layer setting and sprayed thermal treatment; the defects of poor structure uniformity, thermal impact, stress, cracking and oxidizing burning losses existing in the technologies such as a traditional casting method, an overlaying method and a thermal spraying method are overcome, the bearing bush component preparation quality and level are improved, the bush burning frequency is decreased, stopping supercritical vibration is lowered, the stability, accuracy and reliability of a bearing transmission unit are improved, and the service life of the bearing transmission unit is prolonged; the method is rapid, efficient and environmentally friendly, is used for bearing bush manufacturing and repair remanufacturing, and has good economic benefits and social benefits.

The invention discloses a heart chamber simulator driving mechanism, which comprises a motor, a speed reducer, a crank shaft connecting rod mechanism, a linear guide rail and a piston air cylinder, wherein an output end of the motor is connected with an input shaft of the speed reducer, an output shaft of the speed reducer is connected with one end of the linear guide rail through the crank shaft connecting rod mechanism, the other end of the linear guide rail is connected with the piston air cylinder through a shaft coupler, an air hole is formed in the side wall of the piston air cylinder, and the air hole is connected with a heart chamber simulator through a pipeline. The driving mechanism belongs to a driving mechanism capable of providing a pulsation type power source for the heart chamber simulator according to the set frequency and discharge capacity. The driving mechanism has the advantages that the pulsation feature of the beating of the heart chamber simulator can be realized, meanwhile, the beating frequency and the discharge capacity can be respectively regulated, and the human body heart beating process is more really simulated.

The invention discloses a fuel cladding and a fuel component; the fuel cladding includes a zirconium alloy base, an intermediate layer arranged on the zirconium alloy base and having nonstoichiometryand gradient characteristics, and an ambient shielding layer arranged on the intermediate layer; the intermediate layer and the ambient shielding layer form a gradient composite coating of nonstoichiometry on the zirconium alloy base. The fuel cladding and the fuel component have the advantages that the problem that a traditional zirconium alloy cladding with single coating experiences interfacialstress and interfacial diffusion and zero tolerance to high temperature vapor oxidation is solved; through synergic design and the gradient composite coating of nonstoichiometry in the fuel cladding,the fuel cladding is applicable to accident fault-tolerant nuclear fuel claddings, and anti-accident ability of a nuclear reactor to maintain nuclear fuel component structure and functional integrality under severe conditions and its safety threshold are greatly increased.

The invention provides a method for continuously rectifying 3-chloropropyl triethoxysilane, belonging to the field of chemical engineering separation. The device is characterized by comprising an ethanol rectifying separating device and a 3-chloropropyl triethoxysilane rectifying separating device which are structured the same and connected in series by a conveying pipeline and a material transforming pump, wherein each of the two rectifying separating devices which are structured the same comprises a rectifying tower, a condenser and a finished product storage tank which are connected with the top of the rectifying tower by a reflux pipeline, a condenser and a crude product storage tank which are connected with the bottom of the rectifying tower by the conveying pipeline. The crude product storage tank is connected with a next group of a rectifying separating device by the material transforming pump. In the first tower, ethanol is removed at normal pressure to reach a purity of more than 99.8%; in the second tower, 3-chloropropyl triethoxysilane is removed by rectifying at a negative pressure of -0.0098Mpa to reach a purity of more than 99.5%.

The invention relates to a drill stem thickening process and a thickening module. The thickening module comprises a thickening module 1 and a punching module 2. a third time thickening module is a final forming module, namely an inner thickening copying module, which comprises a clamping area 11, a transition belt 12, a thickening area 13, a transformation transition belt 14 and a starting area 15 which are orderly connected with the thickening area 13. The length of the transition belt of the thickening module is prolonged and the transition is performed in the manner of S-shaped smooth transition. The invention overcomes the shortcomings of the prior art that the shape of the transition belt in the drill stem is uneven, lathe work is required, the stress concentration is easily occurred, the service life of the drill stem is short, and the like. Compared with the prior art, the thickening transition belt in the drill stem can naturally smooth transit so the stress concentration in the deformation area and the probability of generating vortex caused by size change during usage are greatly decreased, the stress at the thickened tube joint part is reduced, the inner transition belt of the final products is unnecessary to form, the use life of the drill stem is prolonged and the drill stem quality is ensured.

The invention discloses a diameter-changeable pulsating heat pipe. The diameter-changeable pulsating heat pipe comprises an evaporation section, a heat insulating section and a condensation section. A pulsating heat pipe vacuumizing opening and a pulsating heat pipe working medium filling opening are formed in the left end and the right end of the condensation section correspondingly. Upper bends and lower bends of the pulsating heat pipe are connected with adjacent main channels with different hydraulic diameters and the main channels with the different hydraulic diameters are distributed and connected in the shape of an S on a whole silicon plate. The diameter-changeable pulsating heat pipe has the advantages of being simple in structure, good in heat transferring performance and easy to miniaturize. Meanwhile, compared with traditional pulsating heat pipes, the outstanding effects that the large pressure difference can be formed more easily compared with the traditional pulsating heat pipes during starting by the aid of the hydraulic diameter differences of the bends of the pulsating heat pipe, frictional resistance and shearing stress are overcome and accordingly the starting time is shortened, the pulsating heat pipe can take more heat away from the evaporation section due to the hydraulic diameter differences of the bends of the pulsating heat pipe compared with the traditional heat pipes, and meanwhile the heat exchange frequency is increased are achieved.

A miniaturized heat-resistant and high-dynamic pressure sensor comprises a sensor probe which is internally provided with a sensor chip, the sensor chip is fixed through a heat-resistant ceramic adhesive, the sensor probe is connected with a metal tungsten filament which passes through a seal plate, and the seal plate is connected with the sensor probe; the front end face of the sensor probe is provided with a pressure guidance hole which communicates with a pressure channel and a square sensor chip in the sensor probe, the rear end of the sensor chip installation groove is provided with a sensor vacuum chamber, and the side wall of the sensor probe is internally provided with a the metal tungsten filament taken as a lead terminal of the pressure sensor; the sensor chip is square-shaped, four sensitive resistors are arranged at the front surface of the sensor chip in the same direction, the back surface of the sensor chip is a square cavity corresponding to a square sensitive film, andthe pressure is applied to the square sensitive film through the pressure guidance hole. The miniaturized heat-resistant and high-dynamic pressure sensor is small in volume, resistant to heat and fast in response, and can be used for measurement of the total pressure and the static pressure.

The invention discloses an object gating control method and auxiliary control equipment adopting the method and applied to automatic drive during meeting of motor vehicles, and belongs to vehicle signal circuits and control. According to the method, the number of objects is selected by a control terminal, voltage is set one by one and transmitted to an executing terminal, the set voltage is compared with corresponding preset voltage with a voltage identification circuit, the set voltage conforming to the preset voltage is gated, and control is realized. A crossing high and low beam light automatic control device, a high and low beam light and turn light automatic control device for overtaking and following, a front vehicle turning informing signal automatic control device for a following vehicle and a meeting signal control display device of an automatic drive control system replace total manual operation, specified by traffic safety laws, of the high and low beam lights and turning lights during crossing, overtaking and following of the motor vehicles, and automatic control and driving state information display of front and back close vehicles are realized. Two hands of a driver only tightly hold a steering wheel during meeting, other operation is not required, so that the labor intensity is reduced, the mental tension is overcome, erroneous judgment and false action are avoided, and convenience is brought to newbies; the traffic rate is increased, and the defect of high probability of accidents during meeting of the motor vehicles are overcome.

The invention discloses a multi-layer elastic composite film having functions of bending shape maintenance and impact resistance and a preparing method thereof. The composite film has a function of cambered surface covering shape maintenance, a function of elastic vibration absorption and a function of resisting violent impact. The composite film comprises a film protecting layer, a using layer and a stripping layer from top to bottom. The film protecting layer is disposed on the using layer. The stripping layer is disposed under the using layer. The using layer comprises a UV coating, an uppermost transparent film, an upper adhesive coating, a first soft transparent film, a first adhesive coating, a second soft transparent film, a second adhesive coating, and a lowest soft transparent film from top to bottom. The composite film can be firmly adhered to a screen, is not liable to rebound, and has good cambered surface fitting and shape maintenance capability, thus achieving cambered surface edge covering.

The invention discloses a four-dimensional dynamic ground stress simulation method which comprises the following steps: S1, establishing a three-dimensional geologic model; S2, establishing a three-dimensional oil reservoir model and predicting a three-dimensional pore pressure field and a temperature field at different stages by utilizing production/injection dynamic parameters; S3, establishing a three-dimensional ground stress model; S4, forming an initial ground stress field; S5, establishing a four-dimensional dynamic ground stress model according to an initial three-dimensional ground stress filed model by taking the dynamic three-dimensional pore pressure field and the temperature field; S6, making a seepage-stress coupled solution and analyzing and calculating dynamic ground stress and pore elasticity parameters used for guiding wells engineering practice. The method has the beneficial effects that the changing situations of the dynamic ground stress and the pore elasticity parameters in an oil and gas exploitation process can be accurately reflected, so as to provide guidance for refracturing of old wells and drilling and completion operation of new wells.

The invention relates to the field of bridge construction, in particular to a large-span arch bridge arch ring line shape control method and an optimization calculation model. Aiming at an arch bridgewhich is large in arch rib span, large in hoisting weight, large in number of hoisting sections and difficult in linear control, a traditional method is adopted for generating large transverse deviation in the construction process; based on this, a space finite element model is established through finite element software; based on an influence matrix principle, a displacement influence matrix ofthe arch ring is calculated under the action of dead weight, each unit of cable buckling force and each unit of side cable wind cable; then, according to the coupling effect of the buckle cable and the side cable wind cable on displacement and in combination with the optimization calculation theory, the deviation between the buckle cable and the target line shape after closure and cable looseningserves as a constraint function, the deviation between the buckle cable and the target line shape in the construction process serves as a target function, the buckle cable force and the side cable wind cable initial tension are solved, and then the arch ring line shape and cable force in construction are calculated; results show that the vertical deviation and the transverse deviation of the archring of the arch bridge with the span of 360 m can be controlled within 10 mm and 6 mm respectively after the arch ring is closed and the cable is loosened, and high-precision assembly of the arch ring can be achieved.

The invention discloses a silica sol-combined mullite perfusion material adapted to rapid repair of an industrial furnace, which belongs to the refractory material technical field. The perfusion material comprises the following raw materials by weight: 50-60% of mullite granules, 10-20 % of mullite powder, 5-10% of white alundum powder, 4-15% of alpha-active alumina micro powder, 0.6-1.0% of magnesium oxide powder, 0.5-0.7% of dextrin, 10-16% of silica sol and 1-2% of dispersing alumina. The silica sol-combined mullite perfusion material is characterized in that the silica sol is individually packaged; other components are weighted according to ratio and mixed through mechanical stirring to uniform aggregates in a dry state; on construction site, the individually packaged silica sol and uniform aggregates in the dry state are weighted according to ratio, and uniformly mixed and stirred and pumped for construction. The perfusion material has the advantages of excellent physical and chemical property and good application property, pumping for construction can be used, manpower and material resources can be saved, rapid repair requirement for various industrial furnaces can be satisfied, and the perfusion material is the excellent repair refractory material with strong adaptability.

The invention relates to a fuse salt jet impinging heat dump which comprises an absorber (1), a high-temperature steel plate (2), inflow ports (3 and 3'), an outlet (4) and a nozzle (16), wherein the fuse salt jet impinging heat dump (8) is a of cylinder shape, and the front of the absorber (1) faces converged sunlight; the high-temperature steel plate (2) is positioned at the interior of the fuse salt jet impinging heat dump (8) and fixed on the shell of the fuse salt jet impinging heat dump (8) in welding manner, and the high-temperature steel plate (2) is embedded with the nozzle (16); an outlet of the nozzle (16) faces the back of the absorber (1), the inlet is connected with the inflow ports (3 and 3') arranged on the bottom of the fuse salt jet impinging heat dump (8); fuse salt is delivered to the inflow ports (3 and 3') through pump exhausting to flow to the nozzle (16) through a pipeline, thereby spraying to absorber (1), and the absorber (1) is subjected to jet impinging cooling so as to take away the heat; and the heated fuse salt flows out from the outlet (4) of bottom of a gap positioned between the absorber (1) and high-temperature steel plate (2).

A temperature control device of a flue gas desulfurizing and acid-making hot blast stove comprises a programmable controller, wherein a coke oven gas pressure regulating valve, a coke oven gas pressure sensor, a coke oven gas flow sensor and a coke oven gas flow regulating valve are mounted on a coke oven gas inlet pipeline; a combustion air flow sensor and a combustion air flow regulating valve are mounted on a combustion air inlet pipeline; a temperature sensor and a pressure sensor are mounted on the flue gas desulfurizing and acid-making hot blast stove; and the programmable controller exchanges signals with the coke oven gas pressure regulating valve, the coke oven gas pressure sensor, the coke oven gas flow sensor and the coke oven gas flow regulating valve on the coke oven gas inlet pipeline, exchanges signals with the combustion air flow sensor and the combustion air flow regulating valve on the combustion air inlet pipeline, and exchanges signals with the hot blast stove temperature sensor and the hot blast stove pressure sensor on the flue gas desulfurizing and acid-making hot blast stove. The temperature control device of the flue gas desulfurizing and acid-making hot blast stove can quickly and accurately control the temperature and the pressure of the hot blast stove, so that the hot blast stove can meet flue gas desulfurizing and acid-making requirements of a sintering machine.