32results about How to "Ensure safe service" patented technology

The invention relates to a method for rapidly repairing cement emulsified asphalt mortar interface connection damage of a unit slab ballastless track; the method mainly comprises the steps of cleaning, sealing, setting of grouting openings, interface connection damage grouting and edging treatment; the specific steps are as follows: firstly, cleaning dust and impurities around a mortar interface connection damage; secondly sealing the interface connection damage area, setting the grouting openings and placing a dial indicator at four corners of a track slab in a to-be-repaired area; thirdly, connecting a dual-component self-mixing grouting machine with a pressure grouting hose, and injecting a dual-component grouting material to the grouting openings in sequence; after the mortar comes out of a grouting opening having the spacing of more than the width of the track slab with the next grouting openings, turning to the next grouting opening to grout continuously till the whole cement emulsified asphalt mortar seam area is fully grouted; and finally, cutting the grouting hose, polishing sealed materials to finish the repairing. The method has the characteristics of simple and rapid process, high repairing efficiency and capability of realizing rapid repairing within skylight time and is applicable to repairing the cement emulsified asphalt mortar seams of the unit slab ballastless track.

The invention discloses a water seepage and crack regional overall treatment method for an open excavation tunnel of a high speed railway. The method comprises the following steps: surveying a water leakage situation, determining a drilling position and drilling; cleaning the drilled hole; embedding a grouting nozzle; grouting to form a new waterproof membrane; performing water leakage inspectionafter grouting is performed; and cutting and removing the exposed grouting nozzle and performing sealing treatment. The invention provides the water seepage and crack regional overall treatment methodfor the open excavation tunnel of the high speed railway which forms integrated structural strength by lining aiming at the characteristics of the open excavation tunnel of the high speed railway, particularly at the complex tunnel situations of large number of water leakage cracks, wide distribution range and the leakage of unplugged cracks in the periphery caused by plugging one crack; integrated grouting in rings in the overall cross section is adopted, and grouting holes are uniformly distributed in each ring, so that uniform grouting at the positions, such as an arch top, a hance and a side wall, can be realized; and regional overall treatment is performed to form a new waterproof system, so that guarantee is provided for safety service of a tunnel structure.

The invention discloses an annular cylindrical tuned liquid damper for controlling vibration of a long boom of a long-span bridge, and a design method, and belongs to the technical field of engineering structure vibration control. A box body bracket is mounted in a central point of a to-be-controlled boom, and then two split box bodies are spliced and mounted on the box body bracket; and accordingto a set height, a damping liquid is added into a damper box body, and a top cover on the upper side is closed to prevent the liquid from being splashed or volatilized. The liquid in the box body shakes for consuming energy and applying a lateral force to a barrel wall, thereby realizing control on a power response of the boom. A calculation method for specific parameters of the annular cylindrical tuned liquid damper is given in the patent; and the damper has the advantages of good shock absorption effect, low mounting and repair costs, convenient repair, easy tuning and the like, and is ofpositive significance for prolonging the service life of the boom and guaranteeing safe service of the boom.

The invention discloses a progressive control method of railway open trench tunnel lining deformation joint leakage water. The method comprises the following steps of performing field investigation onthe deformation joint leakage water condition; cleaning a deformation joint; drilling a hole near the deformation joint; cleaning the drill hole; installing a grouting nozzle; burying a grouting pipeinto the deformation joint; performing grouting through an outer side inclined grouting hole and an inner side vertical grouting hole; performing grouting through a middle grouting pipe; after the grouting, performing seepage water inspection onto the deformation joint; cutting away the externally exposed grouting nozzle; and performing sealing treatment. By aiming at the characteristics of a railway open trench tunnel, the invention provides the progressive control method of railway open trench tunnel lining deformation joint leakage water for implementing the complete sealing and blockage on a leakage water passage; the progressive grouting sealing and blockage on the deformation joint is realized through sequentially performing grouting on the outer side inclined grouting hole, the inner side vertical grouting hole and the middle grouting pipe; the leakage water passage is completely cut; and the guarantee is provided for the safe service of a tunnel structure.

The invention discloses an electron beam welding technology improving aluminum-lithium alloy weld formation and improving joint quality. The electron beam welding technology includes the steps that firstly, an aluminum-lithium alloy plate is machined into a welding sample, and the sample is cleaned; secondly, the sample is fixed in a vacuum chamber of an electron beam welding machine, primary welding is conducted, a butt joint manner is adopted, and quasi-circular electron beam scanning wave forms are applied in the welding process; and thirdly, a defocusing electron beam is adopted for conducting modification welding on the surface of an aluminum-lithium alloy electron weld completed in the second step. The electron beam welding technology has the beneficial effects that the technology process is simple, joint weld formation is good, and the joint quality is high.

The invention provides a method for designing and monitoring the service life of a steam turbine rotor under the action of low-cycle and high-cycle fatigue. The method comprises the following steps that S1, obtaining operating parameters of a steam turbine, performance parameters of the steam turbine rotor, crack size parameters, a total service life criterion value tau < 0 > and the operating service life tau; s2, in the design stage of the steam turbine, calculating the theoretical total service life tau CLt of a steam turbine rotor under the action of low-cycle fatigue and high-cycle fatigue; when tau CLt is smaller than tau 0, optimizing performance parameters of the steam turbine rotor, and recalculating tau CLt until tau CLt is larger than or equal to tau 0; s3, in the use stage of the steam turbine, calculating the theoretical residual life tau Rf of the steam turbine rotor under the action of low-cycle fatigue and high-cycle fatigue; and when tau Rf is less than (tau 0-tau), optimizing the operating parameters of the steam turbine, and recalculating tau Rf until tau Rf is less than (tau 0- tau). The method can be used for monitoring the total service life of crack initiation and crack propagation of the steam turbine rotor under the action of low-cycle fatigue and high-cycle fatigue in the design stage and the use stage, and safe service of the steam turbine rotor is guaranteed.

The invention discloses a pre-embedded reference electrode for monitoring corrosion of reinforced concrete. The pre-embedded reference electrode comprises a copper cable, a sleeve, a gel electrolyte, an electrode body, a microporous ceramic block, a protective jacket, a post-activation sealing component, a water-absorbing expansion layer and a post-activation sealing component dissolution mortar; the post-activation sealing component is arranged outside a medium transmission end of the existing reference electrode to block the medium transmission between the internal electrolyte and concrete in the earlier period, the water-absorbing expansion layer is filled between the microporous ceramic of the medium transmission end of the reference electrode and the post-activation sealing component so as to fill up the gap after the post-activation sealing component is dissolved, so that the good transmission of medium can be guaranteed. The service life of the reference electrode is remarkably prolonged by adopting a later activation method, and the monitoring on the whole life cycle of the reinforced concrete corrosion state can be realized. The invention further discloses a manufacturing of the pre-embedded reference electrode for monitoring the corrosion of reinforced concrete.

The invention relates to a coating method of a corrugated pipe assembly for a high-voltage switch, and belongs to the technical field of coating. The method comprises the steps that gasoline is used for cleaning the corrugated pipe assembly, then, heating and baking are performed under the temperature of 45-55 DEG C, then, gasoline is used for performing key local cleaning and heating baking underthe temperature of 45-55 DEG C on the corrugated pipe assembly, oil stains at gaps of parts are thoroughly cleaned away, oil stains are volatilized or carbonized, the method can improve the cleaningefficiency and quality of the corrugated pipe assembly, binding force of a film is improved, according to the coating product obtained through the method, the yield is greatly increased, the coating adhesive force reaches level 0-1, and the safety service of the high-voltage switch and safety operation of a power grid are ensured.

The invention discloses an ultrasonic positioning method of a SiC fiber reinforced Ti-base composite material ring piece core, and belongs to the technical field of preparation and detection of a composite material. A SiC fiber reinforced Ti-base composite material ring piece has a sandwiched structure and consists of a composite material ring core and a peripheral Ti alloy outer sleeve. By utilizing a water leaching focusing ultrasonic detection method, firstly the accurate sound speed of ultrasonic waves in the composite material ring core and the Ti alloy outer sleeve is acquired by virtue of a measurement-aided calculation method, and then a distance from the surface of the ring piece to the core and the contour size of the ring piece core are measured by utilizing the sound speed, so that the ring piece core can be accurately positioned. By adopting the method, important significance on improving the machining quality of the SiC fiber reinforced Ti-base composite material ring piece and guaranteeing the safety application can be achieved.

The invention discloses a high-temperature strength prediction method of martensitic steel/ferrite steel based on microstructure degradation, namely a high-temperature strength prediction model basedon microstructure degradation under high-temperature service conditions. Based on the contribution of different strengthening mechanisms to the yield strength, the key microstructure parameters of thematerial under high temperature service condition are introduced to calculate the high temperature yield strength with high temperature service damage state. The high-temperature strength predictionmethod based on microstructure degradation established by the invention can accurately predict the high-temperature strength of the high-temperature structure in long-term high-temperature service. Byincorporating the degradation of high temperature strength caused by microstructure degradation into the life assessment of high temperature structure, the service safety of high temperature structure can be further ensured, and the loss of life and property can be reduced.

The invention provides a monitoring sensor for accumulated fatigue damage of mechanical structure under normal load distribution rule, a design method and a monitoring method, which belong to the technical field of structure fatigue monitoring. An installation pin of the fatigue damage monitoring sensor is used for bearing stress on the surface of the mechanical structure; two strain amplificationbridges are used for amplifying the average strain of the surface of the measured structure at the position covered by a stretching arm at different multiplying powers, so as to guarantee that the fatigue life foil works within the effective strain amplitude range; through a structure cumulative fatigue damage monitoring model, when the structure serves under the load effect complying with the normal distribution rule, the cumulative fatigue damage of the mechanical structure can be obtained according to the resistance cumulant of the double-fatigue-life foil. Safe service of mechanical partsis ensured, and accidents are prevented.

The invention discloses a part structure reliability topological optimization design method considering bounded hybrid uncertainty. The method comprises the following steps: considering uncertainty in part structure manufacturing service, and respectively describing external loads with insufficient samples and material attributes with sufficient samples as interval variables and bounded probability variables; and discretizing a part structure design domain, setting physical and geometric constraints, and establishing a reliability topological optimization design model. Solution by utilizing a moving asymptote method comprises: decoupling probability interval uncertainty, and determining a worst working condition by utilizing a constraint performance gradient; defining worst working condition performance fluctuation and calculating constraint performance reliability; and finally calculating the gradient of the target and the constraint function on the design variable for iteration. The optimization design model established by the method truly reflects the distribution characteristics of the multi-source uncertainty of the part structure, is efficient in solving, and has good engineering application value.

The invention provides a turbine shaft-end seal device applied to a Kalina power circulating system. The device comprises a spiral seal system and a water seal system, wherein the spiral seal system comprises a spiral shaft sleeve, a stationary sleeve, a leak collecting cavity, a seal cavity and a mechanical seal; the spiral shaft sleeve is embedded onto the main shaft of a Kalina power circulating turbine, the stationary sleeve and the spiral shaft sleeve are arranged in a spaced manner at the same end of the main shaft in a sleeving manner to form the spiral seal, the seal end of the stationary shaft and the end part of the main shaft form a sealed cavity, the open end of the stationary sleeve and the main shaft form a cavity as the leak collecting cavity, and the mechanical seal arranged between the stationary sleeve and the main shaft is located in the leak collecting cavity; when the main shaft rotates, the spiral shaft sleeve rotates to pressurize the seal cavity; the water sealsystem comprises a pressurizing pump, an adjusting valve and a water tank; the input end of the water tank communicates to the leak collecting cavity while the output end of the water tank communicates to the tail end of the gap between he spiral shaft sleeve and the stationary sleeve successively through a pressurizing pump and the adjusting valve. Through three seals: the mechanical seal, the water seal and the spiral seal, the problem of corrosion caused by contact of ammonia-enriched steam and the mechanical structure is avoided.