1874results about How to "Reduce repair costs" patented technology

The invention discloses a chemical leaching restoring method for soil polluted by heavy metals. Na2EDTA solution is utilized to perform leaching to the soil polluted by the heavy metals, available cadmium and lead in the soil are effectively removed, Na2S.9H2O is utilized to precipitate the heavy metals in filtrate, Na2EDTA is released again, and repeated recycling of the Na2EDTA solution is achieved. After recycling, the Na2EDTA solution carries out leaching to the soil polluted by the heavy metals, the removing rate of available Cd in the polluted soil reaches 81.6-81.8%, and the removing rate of available Pb reaches 55.9-60.1%. The chemical leaching restoring method for the soil polluted by the heavy metals overcomes the shortcomings that an existing method for the Na2EDTA solution to perform leaching to the soil polluted by the heavy metals causes chemical cost to be large, generated filtrate is much, and the follow-up treatment is troublesome. Simultaneously, the chemical leaching restoring method for the soil polluted by the heavy metals has the advantages of being simple in process, becoming effective quickly, enabling a leaching agent to be reused, and enabling the heavy metals to be effectively eliminated.

The invention relates to an ecological restoration method for a city watercourse. The ecological restoration method for the city watercourse is characterized in that the polluted city watercourse is comprehensively restored with the combination of physical, biological and ecological technologies, the ecological theory is used for reference in the treatment process, the ecological idea is used as the guiding thought, a complex water ecosystem structure is constructed and restored, the original natural state of the watercourse is restored, the self-cleaning capacity of a river system is improved, the environment is beautified, and the local city microclimates are improved at the same time. The ecological restoration method mainly comprises the steps of (1) controlling a pollution source, (2) modifying the river bank, (3) optimizing the environment of the river bottom, (4) modifying the watercourse, (5) conducting aeration and oxygenation, (6) constructing an aquatic plant community, (7) constructing a fish and macrobenthos community, and (8) maintaining the system. The watercourse ecological system restored through the ecological restoration method has the certain anti-interference capacity, on the premise that a large amount of exogenous pollution is cut off, the certain-strength interference can be resisted, and the good ecological environmental effect is obtained. After one-time input, the better ecological benefit can be obtained only with a small number of maintenance costs.

A self-contained stock lifter is particularly adapted for use in multiple station, progressive metal forming dies and the like, and includes a base plate with two vertical through holes adjacent opposite sides, and a vertical spring unit aperture located between the through holes. The stock lifter also includes a lifter bar having two vertical through holes in vertical registry with the base plate through holes. Two rigid guide shafts are mounted in the base plate through holes to permit the lifter bar to reciprocate in a manner which selectively lifts stock in the die to permit longitudinal shifting of the stock along the multiple die stations. A spring unit has a base retained in the spring unit aperture, and a reciprocating rod biased outwardly, with a free end abutting a central portion of the lifter bar to shift the lifter bar to an extended position, thereby defining a fully self-contained unit that can be readily mounted in and removed from the die to reduce manufacturing and repair costs.

The invention discloses a column-through assembled prestressed concrete frame system and a construction method thereof. The system comprises a foundation, a prefabricated reinforced concrete column, a prefabricated reinforced concrete beam, a superimposed floor slab and an external hung prefabricated wallboard, wherein a column prestressed duct is formed in the prefabricated reinforced concrete column; a beam prestressed duct is formed in the prefabricated reinforced concrete beam; post-tensioned unbonded prestressed tendons are penetrated into the beam prestressed duct and the column prestressed duct; energy-dissipation steel bars are anchored between the prefabricated reinforced concrete column and the superimposed floor slab. The structure provided by the invention has a good seismic performance; the lower part of a beam-column joint is subjected to unreinforced connection so that the structure is simple; the post-tensioned unbonded prestressed tendons and a replaceable column base energy dissipater are used so that the structure is less damaged and easy to be repaired in the earthquake; a construction manner of using the prefabricated superimposed floor slab and prestressed assembly makes site construction convenient and rapid and saves a lot of supports compared with a traditional prefabricated assembly structure; the column-through assembled prestressed concrete frame system provided by the invention is used in combination with lateral supports, shear walls and other lateral force resisting members, and is applicable to most high-rise public buildings.

The invention discloses a soil washing restoration system based on a reduction concentration design concept and a method thereof. The washing restoration system comprises the following four module units which are sequentially connected with one another: a feeding and screening unit, an ore washing unit, a sludge dewatering unit and a tail-end sewage treatment recycling unit. The pollutants on the surface of coarse particles are eluted, transferred and concentrated into the filter-pressed mud cake by virtue of washing, so that pollutant-containing fine particles in contaminated soil can be effectively separated from crude particles such as gravel and grit. The repaired and discharged clean gravel and grit can be directly recycled to serve as building material. According to the system, purified water serves as a washing solution, so that secondary pollution caused by addition of a chemical washing agent is avoided, and the washing solution is treated by a tail-end sewage treatment system so as to be recycled. The reduction of remediation of contaminated soil is realized, the comprehensive repair cost is greatly reduced, the washed and discharged materials can be recycled, the contaminated soil is repaired, and a novel profit point is created.

This invention presents a noise cancellation device for improved personal face-to-face and radio communications in high noise environments. The device comprises speech acquisition components, an audio signal processing module, a loudspeaker, and a radio interface. With the noise cancellation device, the signal-to-noise ratio can be improved by as much as 30 dB.

Impact damper assembly for an automobile, in particular for supporting a bumper 5 on an automobile chassis, with an inner tube 2 movably arranged in an outer tube 3, wherein both tubes 2, 3 have an approximately mutually parallel taper 16, 19, wherein the taper 19 of the inner tube 2 is encompassed by the taper 16 of the outer tube 3, and wherein at least one of the two tubes 2, 3 can be deformed during the movement by the taper 16, 19 of the two tubes. The invention is characterized in that the impact damper assembly includes an additional deformable stiffening element 22.

The present invention belongs to the metal surface crack repairing method, meaning the tip crack repairing method of a gas-turbine engine high-pressure turbine blade. The method comprises polishing apertures for complete crack removal based on the crack conditions of the gas-turbine engine high-pressure turbine blade tip, carrying out surfacing welding in the repair welding zone using low-heat input welding technology and implementing heat treatment process to the repaired blade. The present invention has the virtues of simple process, needing no vacuum or preheating, small damage to blade base materials, realizing loss-free repair to the high-pressure turbine blade tip cracks and reducing repair cost. The invention can be used to repair both the gas-turbine engine high-pressure turbine blade tip cracks and steam turbine, smoke turbine and other turbine mechanisms high-pressure or low-pressure blade tip cracks. And the aircraft engine high-pressure turbine blade repaired with the method has passes 368h long-term bench trial check.

A bumper for a motor vehicle includes a cross member which is disposed transversely to side rails of a motor vehicle frame and connected to the side rails via crash boxes. The cross member has a C-shaped cross section and includes an outer shell member and an inner shell member. The inner shell member is constructed as tension link which is made of a material having a tensile strength that is greater than the tensile strength of a material of the outer shell member.

A vehicular impact absorbing apparatus includes a pair of tubular guide rails having a guide slit longitudinally formed at the upper part of each guide rail fixed to the ground. Sliders are movably mounted in the guide rail at predetermined intervals, the upper part of each slider is laid on the upper part of the guide rail through the guide slit. Cushion units are mounted on the upper part of each slider. Each cushion unit is elastically deformed by vehicular impact while retracting along the guide rail. Cushion pins are mounted across the guide rails at predetermined intervals between the sliders that also absorb the kinetic energy of an impact by being broken by the rearward retracting slider. A stopper is installed around the rear end of the guide rail for stopping the retracting cushion units. A successive cushion and deceleration of the impact is possible in this arrangement.

The invention discloses modified nanoscale zero-valent iron and a preparing method thereof. The modified nanoscale zero-valent iron comprises nanoscale zero-valent iron and lauryl sodium sulfate. The lauryl sodium sulfate is wrapped on the surface of the nanoscale zero-valent iron, and the mass ratio of the lauryl sodium sulfate and the nanoscale zero-valent iron is 0.01-0.07. The preparing method of the modified nanoscale zero-valent iron comprises the following steps that nanoscale zero-valent iron particles are dispersed in a lauryl sodium sulfate solution through ultrasound, and the modified nanoscale zero-valent iron is obtained. According to the modified nanoscale zero-valent iron and the preparing method thereof, the lauryl sodium sulfate is used for modifying the nanoscale zero-valent iron, through a steric-hinerance effect, nano materials are stabilized, and the advantages of being good in dispersing performance, good in stability, high in reactivity and the like are achieved.

A first projection portion projecting outward, in a vehicle width direction, from a front side frame is provided. A front end of the first projection portion is located at the same position, in the vehicle longitudinal direction, as a connection portion of a crash can to the front side frame or located in back of the connection portion. An outward side face of the first projection portion is configured to slant rearward and inward in a plan view. The first projection portion and a power unit are arranged to overlap each other in the vehicle longitudinal direction. Accordingly, an impact transmitted to a vehicle-compartment side in a small overlap collision can be reduced, restraining repair costs of the crash can broken in a low-speed collision as well as maintaining appropriate design flexibility of a vehicle-body front portion.

The invention discloses a technology for repairing surfacing of a piston rod of a super large marine diesel engine, and the technology can carry out the deep repair of the surface of the piston rod. The adopted surfacing process is as follows: flaw detection and straightening are carried out on the piston rod, turning machining is carried out on the surface of the piston rod to remove a defect layer, and individual deeper cracks are manually removed by grinding; fire whirl is used for heating the piston rod twice, the first heating is carried out till 200 DEG C-250 DEG C, the heating is stopped, the race rotation is carried out for 30 minutes, the second heating is further carried out after the temperature difference between the interior and the exterior is reduced, and a surfacing machine tool is rotated after reaching 250 DEG C-300 DEG C; submerged arc welding is used for rotating dual heads of the surfacing machine tool and a 2Cr13 flux-cored welding wire for carrying out the simultaneous surfacing, and asbestos cloth is used for wrapping and keeping the temperature during the welding process; the piston rod wrapped by the asbestos cloth for slow cooling after the surfacing achieves the size requirement, when the temperature is decreased to be lower than 100 DEG C, the piston rod wrapped by the asbestos cloth is vertically placed till the temperature is decreased to the room temperature, and then the temperature-keeping cloth is removed. The surface of the piston rod after the repair by employing the method has no weld defects, the piston rod fully meets the performance requirements, and the cost is only about one fifth of the cost for fabricating a new piston rod.

Provided is a heavy metal pollution soil repairing agent using excess activated sludge as the rawmaterial, a method of extraction and a method for repairing the heavy metal pollution soil, which relates to a heavy metal pollution soil repairing agent and a method thereof and a method for repairing the heavy metal pollution soil, and solves the problems of high cost, easily secondary pollution and complex operation existing in the repair of the heavy metal pollution soil. The heavy metal pollution soil repairing agent is composed of amylose, protein, nucleic acid, phosphoric acid, amino acid, humic acid compound, uronic acid and the organic substance required for cell lifecycle. The method for distilling the heavy metal pollution soil repairing agent is as follows: the wastewater treatment excess activated sludge reacts under the condition of 80-120 KPa and 60-100 DEG for 8-20 minutes; then centrifuges for 8-20 min at the rotating speed of 5000-7000r/min. The invention adopts the home position repairing or the heterotopia repairing to repair the heavy metal pollution. The invention has low cost and no secondary pollution, simple operation, short repairing period, strong activity and wide range of application.

The invention discloses a thermal repair method, device, server and system for an Android application. The method includes the steps that a patch pack of the designated Android application is acquired, wherein the patch pack includes a repaired designated class file in the designated Android application; when the designated Android application is started, the patch pack is loaded; when the designated Android application needs to call a designated class file, the repaired designated class file is called from the patch pack to perform corresponding functions. Thus, compared with the prior art, according to the scheme, a series of steps of repacking a designated Android application, conducting testing, exchanging packs to various application markets and channels, reminding a user to conduct upgrading, reminding the user to conduct downloading, conducting coverage installation of the Android application with a new installation pack and the like by a publisher are not needed in the repair process, thermal repair of the Android application can be achieved through one patch pack without changing the original Android application, and thus the repair cost of the Android application is greatly reduced.

The invention belongs to the field of metal material and relates to a method for surface treatment of a titanium electrode substrate. The service life and the electrocatalysis performance of the titanium electrode are greatly increased by the abrasive blasting pretreatment to the substrate. The abrasive blasting treatment is carried out on the titanium substrate; the nozzle pressure of an abrasive blasting machine is 0.3-0.5MPa; the Al2O3 grinding medium of 70-90 meshes is adopted; the blasting angle is 45-90 degrees; the distance from the nozzle to a workpiece is 1-2cm; the coarsening time is 15-30s; the titanium substrate is then pickled for pickling treatment in a 10wt.% of oxalic acid solution for 1.5-2.5 hours at the temperature of 90-95 DEG C; a Ti/IrO2.Ta2O5 oxide coating electrode is prepared on the obtained substrate by a thermal decomposition method, wherein the Ir is chloro-iridic acid, Ta is tantalum pentachloride and the molar ratio of Ir to Ta is 7:3; a coating solution is uniformly coated on the pre-treated titanium substrate by a soft hair brush; the titanium substrate is dried for 10min at the temperature of 120 DEG C, is subsequently arranged in a box-type resistance furnace and sintered for 10min at the temperature of 450 DEG C; the above operations of coating, drying and sintering are repeatedly carried out by 5-20 times; and the final sintering is carried out for 1h at the temperature of 450 DEG C. The method provides optimum pretreatment parameters, greatly prolongs the service life of the titanium electrode, effectively improves the electrocatalytic activity and greatly reduces the running and repairing cost for the electrode.

A separation apparatus for separating two planar devices bonded together by an adhesive layer is provided. The separation apparatus includes a base, a sliding module, a cutting member, and a positioning stage. The sliding module is mounted on the base. The cutting member is connected to the sliding module and is moveable in a two-dimensional plane with respect to the base by the sliding module for cutting the adhesive layer. The positioning stage is mounted on the base for positioning the planar devices and the adhesive layer therebetween on the base.

The invention relates to a benthonic animal-algae-aquatic plant-fish based river water ecological environment self-remediation method. The method is to overcome problems of river water ecological environment remediation methods at present, namely short effect duration, high costs and easy generation of secondary pollution. The method includes 1) evaluating the degree of pollution of a river, 2) planting reed and seeding algae, 3) throwing in plankton and benthic mollusks, 4) planting submerged plants, 5) throwing in shrimps, herbivorous fishes, omnivore fishes and filter-feeding fishes, 6) throwing in carnivorous fishes, and 7) harvesting the reed and the submerged plants before the reed and the submerged plants die, catching the benthic mollusks and the shrimps, and catching the fishes after two years. The method is long in effect duration, low in cost and free of secondary pollution and is applied for the field of river water pollution remediation.