78results about How to "Technical security" patented technology

The invention discloses a hoisting method of a hyperbolic water-tower water tank and a hoisting device. The hoisting method comprises the following steps of: firstly, prefabricating a water tank, installing lifting equipment, and starting to lift after a real-load pressure test is qualified; during lifting, firstly, jacking steel beams and driving a steel strand to lift; after a stroke is completed, utilizing a locking anchorage device to clamp the steel strand at a static steel beam, returning oil, then utilizing the locking anchorage device to clamp the steel strand onto a moving steel beam after falling back, thereby completing a hoisting cycle for one time; and repeatly lifting until the water tank is lifted to the position and then fixing. The hoisting device comprises a lifting part, a supporting part and a sling assembly, wherein the lifting part comprises a moving steel beam, a static steel beam and a hydraulic lifting device arranged between the moving steel beam and the static steel beam; and the sling assembly comprises a steel stand. The top of the steel stand penetrates through the moving steel beam and the static steel beam and is clamped on the steel beams through the locking anchorage device, and the bottom of the steel stand is connected with the water tank. The construction method and the device are simple in operation and have the advantages of low cost, low labor strength, low energy consumption, strong safety and reliability and good quality of construction.

The invention discloses a Fourier transform infrared spectrum quantitative analysis-based transformer oil-immersed gas analysis system and an analysis method thereof. The system comprises a first transformer oil valve, a second transformer oil valve, an oil-gas separation device, a Fourier transform infrared spectrometer with an air chamber, a computer, an oil inlet pipe, a return oil pipe and a gas conveying pipeline. The analysis method comprises the following steps of: performing oil-gas separation on the transformer insulating oil, and then quantitatively analyzing the separated gas by using the Fourier transform infrared spectrometer to realize quick and quantitative analysis of the multi-component gas. The analyzed gas comprises iso-butane, n-butane, carbon monoxide, propylene, propyne, sulfur hexafluoride and water vapor besides methane, ethane, propane, ethylene, ethyne and carbon dioxide in conventional transformer oil-immersed gas analysis. Because of more categories of the analyzed gas, high speed, high resolution, low running cost, safety and reliability, the method is a transformer oil-immersed gas analysis method with broad application prospect.

Enhanced safety for electrical appliance, such as toaster, toaster ovens or rotisseries, is provided by a circuit arrangement which removes power from all or a portion of the appliance upon detection of potentially dangerous conditions as well as activating a visual or audible alarm. The circuit arrangement includes sensors and circuitry for detecting various types of dangerous or hazardous conditions.

The invention relates to a heterogeneous catalytic method for synthesis of isophorone from acetone. Acetone is used as a raw material, and a magnesium-aluminum composite oxide is used as a catalyst for carrying out catalytic synthesis to obtain isophorone; the magnesium-aluminum composite oxide comprises MgO, Al2O3 and MgAl2O4, the molar ratio of magnesium to aluminum is 0.3-3, the specific surface area is 80-150m<2>/g, and the pore volume is 0.2-0.3cm<3>/g; a fixed bed reactor is used for carrying out synthetic reaction, 20ml of 20 to 40-mesh catalyst is added into a stainless steel reactor of which the inner diameter is 10mm, the reactor is heated to the reaction temperature from the room temperature at the rate of 10 DED C/min after being qualified through an air-tight test, and then, the analytically pure acetone raw material is injected into the reactor by a duplex plunger pump through a preheater; the reaction temperature is 220-290 DEG C; the reaction pressure is normal pressure; and the air speed of the acetone liquid is 0.1-1.0/h, the selectivity reaches 94.5%, the conversion rate reaches 44.8%, and the stability reaches 1000 hours.

The invention discloses a chaos optimization method for on-line coal quality parameter calculation, which includes the following steps: the real-time parameters of a thermal power unit, such as the coal feed quantity of a coal feeder, the primary wind flow and primary wind temperature of the inlet of a coal pulverizer, the wind-powder mixture temperature of the outlet of the coal pulverizer and the power of the coal pulverizer, are acquired; the parameters of intermediate unknown variables, such as carbon dioxide gas volume, sulfur dioxide gas quantity calculated according to dry basis components and carbon dioxide gas quantity calculated according to dry basis components in exhausted flue gas, are set; a chaos optimization algorithm is adopted to jointly work out the dry ash-free basis component, dry ash-free basis hydrogen component, dry ash-free basis oxygen component, dry ash-free basis nitrogen component and dry ash-free basis sulfur component of coal, as-received basis moisture, as-received basis ash and net calorific value. The method utilizes the real-time soft measurement technology of analyzing as-fired coal elements and net calorific value by using the chaos optimization algorithm to work out the real-time information of coal quality.

The invention relates to an in-situ stress-free resurfacing welding repair process of the abrasion of a large-sized rotor journal. The process comprises the following steps of: (1), carrying out the preparation work of resurfacing welding, filing and shaping burrs, acute angles and the like at the abraded positions of the large-sized rotor journal, cleaning oil spots and rusty scales chemically, then removing repaired positions and covering fatigue layers; (2), carrying out stress-free resurfacing welding, melting a welding wire coldly by adopting a stress-free resurfacing welding machine, carrying out resurfacing welding without temperature rise on the abraded positions of the journal and remaining a processing redundancy; (3), carrying out rough grinding, then carrying out resurfacing welding on defects after rough grinding and afterwards carrying out polishing and fine grinding; and (4), finally, polishing to reach the required size of the rotor journal. The invention adopts a stress-free resurfacing welding technique, has high strength, good quality, high efficiency, short construction period and low cost, enables the in-situ high-quality repair of the abrasion of the large-sized rotor journal to become actual and provides powerful guarantee for the long-term safe running of a generator set; and a resurfacing welding layer and a rotor basal body are in metallurgical bonding.

The invention discloses an unattended automatic driving system for a gas high-outburst roadway. The unattended automatic driving system comprises an intelligent mining drill carriage and a remote control system for controlling the intelligent mining drill carriage. The intelligent mining drill carriage comprises a power system and an execution system driven by the power system. The execution system comprises a track-type rotating chassis, a supporting plate, two vertical columns, two fixing plates, corner lifting oil cylinders and a rod-replacing drilling system. The functions of automatic positioning hole-drilling, automatic drill-up, automatic drill connection, automatic drilling, automatic monitoring, intelligent identification and processing, automatic drill detaching and the like canbe achieved; mechanical, intelligent and unattended driving hole-drilling is achieved; casualty accidents caused by outburst of coal and gas in the coal roadway driving process are avoided; and intrinsically-safe production of driving of the gas high-outburst roadway is formed, the current situation of frequent major and extraordinarily-serious gas outburst accidents in the mine driving period inChina is turned around fundamentally, and safety production of gas high-outburst mines is achieved.

The invention relates to an inorganic conditioning and pin screw machine based integrated sludge deep dehydration treatment process. The process comprises the steps such as primary dehydration, deep dehydration, dehydrated sludge delivery and the like; the moisture content in the sludge is reduced from 99.7% to less than 60% once in two stages by only adopting medication modifying and pin screw machine filter pressing ways instead of depending on any external conditions such as thermal energy and the like. In the whole operation process, no smoke, odor and noise are generated, no external thermal sources are needed, no secondary pollution is caused, the clean production can be realized, and more importantly, an operable approach is provided for waste sludge recycling, so that the process has very important significance in handling a large-area and large-quantity sludge treatment situation on both economic and social benefits.

The invention discloses the technology which carries out selenium nutrient enrichment on laying hens through adding of drinking water with specific content sodium selenite to produce the selenium-rich eggs. The method is used for carrying out nutrient enrichment with safety micro dose and safety uniform controllable dose of inorganic selenium through a drinking water mode on the laying hens so as to achieve the production technology which can stably and continuously raise the laying hens and produce the selenium-rich eggs. The method explores safety enriched micro dose which is suitable for long-term drinking of the laying hens, and matches with the technology which is capable of flexibility mixing and providing selenium-rich enriched water for the laying hens to freely drink according to the physicochemical characteristics that the inorganic selenium is high in selenium content, highly toxic, strong in water-solubility and good in stability. Therefore, the method is well-adapted, safe in use, flexible, convenient and fast, low in cost and easy to popularize.

A process for preparing the extract from capejasmine fruit by use of membrane separation technique includes such steps as extracting in hydrophilic solvent to obtain coarse extract, adding water to become suspension, and membrane separation for removing protein, polyose and other macromolecular impurities.

The invention provides a mobile switching method and system for a low-orbit communication satellite constellation, and the method specifically comprises the steps: firstly, entering a switching process when the quality of a currently connected satellite link is lower than a threshold value, and sequentially selecting the satellite links according to the quality of the satellite links; secondly, judging whether the on-board capacity load can meet user communication requirements or not; and finally, judging whether the remaining visible time of the satellite meets the threshold requirement or not, and avoiding the problem of frequent ping-pong switching. The method is flexible and reliable, engineering implementation is simple, the success rate of switching of the terminal between beams and satellites is effectively improved, the switching frequency is reduced, and the user communication quality and the service experience can be improved.

The invention provides a steam generating system used for a medium-high-voltage and high-power electrode. The steam generating system comprises an electrode boiler, a steam heat exchanger, a heat storage container and a heat transporting exchanger. The electrode boiler, the steam heat exchanger, the heat storage container and the heat transporting exchanger are connected in order. The heat transporting exchanger is used for transporting heat to a user. A heat storage circulating pump is arranged between the heat storage container and the heat transporting exchanger. The electrode boiler is connected with a water treatment device which is used for preparation of pour water. A chemical feeding device which is used for feeding electrolyte is arranged between the electrode boiler and the water treatment device. By means of the system, high voltage power above 10KV can be connected to a boiler system without transformation equipment and corresponding power cable, so that the electric power loss and the cost of the electric power transmission and transformation can be reduced.

The invention discloses an instantaneous dynamic optimization control method. The instantaneous dynamic optimization control method comprises the following steps of receiving an accelerator pedal signal, a gearbox gear signal, and an engine state monitoring sensor signal by a controller; judging whether the opening condition for an instantaneous dynamic optimization function is met or not according to the signals; if yes, entering a function activation state, releasing a power output external characteristic limiting value of an engine to a preset safety margin, and releasing an external characteristic torque limit, so that the responsiveness of a transient output requirement of the engine is improved; else, exiting the function activation state, and restoring the limited state of power output of the engine, so that the safety is guaranteed; and when the function is under a state of exiting activation, and after the opening condition for the instantaneous dynamic optimization function is met again, re-activating the instantaneous function to meet use requirements of a user. The instantaneous dynamic optimization control method disclosed by the invention is low in realizing cost, high in reliability and wide in application scope, and can furthest tap the existing potential of the power output of the engine under the premise that the service life and the discharging conditions of the engine are not influenced, so that the instantaneous power output requirements of the user are met.

The invention discloses a construction method for an opening of a contact channel of an existing shield tunnel, which comprises the following steps of: firstly, supporting and reinforcing duct pieces which do not occupy a road in an opening area and an influence range by adopting a duct piece supporting and reinforcing device; then a three-pilot-hole three-step construction method is adopted for duct piece opening construction, specifically, a middle pilot hole is excavated firstly, and a middle pilot hole connector ring beam, a stand column and a temporary steel support are constructed; a left pilot tunnel is constructed, and the left side ring beam is closed; finally, a right pilot tunnel is constructed, the right side ring beam is closed, and at the moment, totally-closed construction of the opening area ring beam is completed; and dismantling the temporary support after the ring beam is closed and reaches the design strength. According to the method, construction treatment of the existing shield tunnel evacuation channel and the entrance and exit duct piece opening can be safely and rapidly completed, the construction progress is fast, structural deformation is small, the safety quality is guaranteed, the treatment period is effectively shortened, it is ensured that a set target of a construction unit is smoothly achieved, and social benefits and economic benefits are remarkable.

The invention discloses a ventilation structure for a slip ring cover of a wound-rotor motor. A fan blade is arranged at the inner side of a front side air inlet of a cover shell and is driven by a motor shaft; an outer air guide plate is arranged at the upper part of the cover shell, a plurality of air channels are constructed at the lower part of the outer air guide plate through bent inner deflection plates and straight inner deflection plates, and outlets of the air channels are positioned at the upper parts of each group of slip rings and windings respectively; and an air outlet is arranged at the bottom of the cover shell. In the ventilation structure for the slip ring cover of the wound-rotor motor, as cooling air is guided to the upper part of the slip ring end cover and then directly blows to the slip rings through fluid design under the conditions of without increasing the manufacture cost and guaranteeing the safety and reliability of the motor, the cooling effect of the slip rings can be greatly improved, accumulation of carbon powders brought about by axial ventilation can be reduced to the greatest extent, and the reliability of a slip ring brush holder system is effectively improved, so that factories and enterprises with better environmental conditions can save cost when selecting motors with the protection grade IP23, and simultaneously the hidden troubles during use can be eliminated.

A device for locating a cavity within two walls including a syringe including a syringe piston slideable in a first syringe barrel for discharging air or fluid contained in the first syringe barrel on forward movement of the syringe piston into the cavity, the first syringe barrel being attached to a hub of a needle cannula; and a frame which at least in part encases the syringe and which is solely connected to the back of the syringe piston.

The invention provides a waste gas treatment method for a reaction process of preparing epoxy chloropropane from chloropropene. A reaction device includes a reaction tail gas buffer tank, an absorption column, a column bottom heat exchanger, a column top condenser and a column top gas phase buffer tank. Waste gas generated in the process of preparing epoxy chloropropane through chloropropene epoxidation reaction by adopting a reaction control phase transfer catalyst and adopting hydrogen peroxide as an oxidizing agent is subjected to condensation absorption treatment, and chloropropene in therecycled waste gas reaches the emission standard.

The invention relates to a composite resin material with improved performance and application of the composite resin material in automobile decoration materials (such as layered automobile decoration materials). The composite resin material comprises a filler, a filler compatilizer, matrix resin, an optional antioxidant and the like, wherein the filler compatilizer is polyolefin-based modified resin double-grafted by MAH and a silane coupling agent.