314results about How to "Small impact on structure" patented technology

The invention relates to a fiber grating strain and temperature simultaneously measuring sensor. A fiber grating strain sensor is formed by utilizing a second stainless steel pipe to package bare fiber grating, a fiber grating temperature sensor is formed by utilizing a metal pipe to package bare fiber grating, and the fiber grating strain sensor and the fiber grating temperature sensor are packaged in parallel in a first stainless steel pipe by adopting epoxide resin. When the sensor is arranged on an engineering structure, the first stainless steel pipe produces the distortion and transmits the temperature and the strain of the structure to the fiber grating strain sensor at the inner part and the fiber grating temperature sensor without strain influence through the epoxide resin, the measuring value of the strain sensor is compensated by the temperature sensor so as to achieve the simultaneous measurement of the strain and the temperature of the structure.

The invention relates to a novel highway embankment widened structure. The original roadbed slope of the structure is trimmed into a step shape, a high pressure jet grouting pile is disposed below an original roadbed slope cushion layer, pressurized continuous grouting is employed at an original roadbed cushion layer to form a slurry solid bearing plate, parts of pore cavities of the original roadbed are recharged with fine aggregate concrete or mortar; foundation treatment piles are employed to reinforce the foundation of a widened area, a drainage cushion layer is laid throughout the top of the foundation treatment piles; an earthwork cloth is laid on the drainage cushion layer, a cement soil plate is disposed on the earthwork cloth, high strength reinforcing mesh sheets are disposed in the cement soil plate; and the widened area embankment is formed by layered filling of excavation soil and light filler in a construction process. The structure provided by the invention can reinforce the bearing capacity of roadbed soil on both sides of the widened area and the original roadbed slope strength, and enhance the integrality of the embankment structure, reduce longitudinal cracks induced by differential settlement and the like at the juncture of new and old roadbeds, thus having good technical and economic benefits. The invention also discloses a construction method of the novel highway embankment widened structure.

The invention relates to a testing device for a relationship between a pre-tightening force and a torque for threaded fastening connection. The testing device comprises a torque sensor, a torque sensor supporting seat, a three-jaw chuck, a right article placement table, a right clamp, a left clamp, a long screw, a limiting block, a left article placement table, a clamp seat, a supporting seat, a smooth guide rail, a double-end screw, a hand wheel, a pressing plate, a pressure sensor, a chain, a chain wheel, a nut and a fixed pressing plate bolt. By adoption of the testing device, assembly connection of threaded fasteners which comprise bolts with different lengths and connected pieces with different thicknesses can be effectively stimulated. The testing device is slightly influenced by a bolt structure and convenient in test operation, has a function of synchronously measuring an installation torque and the pre-tightening force, and provides test conditions for acquisition of the relationship (a tension relationship) between the torque and the pre-tightening force.

The invention relates to a preparation method of superfine modified kaolin, which is characterized in that the preparation method comprises the following steps that (1), kaolin powder and carbamide are uniformly mixed in an open container, and fully absorb moisture in air to form a mixture; (2), the mixture is heated, and reacts at 70-120 DEG C; a kaolin-carbamide intercalation compound is prepared; an intercalation rate is 80%-98%; (3), the compound is placed into a ball mill; a certain amount of dispersing agent and water is added; wet grinding is conducted; the content of ground kaolin with a particle size less than 2 micrometers is above 90%; a kaolin mud cake is obtained through suction filtration and dehydration; (4) a certain amount of silane coupling agent and water is added into the kaolin mud cake, and stirred at 50-80 DEG C; a coupling reaction happens; the modification is achieved; and (5) the modified kaolin is dried, and the finished superfine modified kaolin is prepared. According to the preparation method, the intercalation rate is high; the influence on a crystal structure of the kaolin is small; a peeling effect is good; and the prepared superfine modified kaolin is particularly applicable to rubber and plastic materials and oil paint.

The invention provides a method for purifying protein of enzyme aggregate based on self-aggregation short-peptide induction. The method comprises the following steps of: fusing and expressing a target protein, a peptide section (preferably intein) containing a cleavage site and a short peptide with self-aggregation function into a triplet in a sequence from left to right or from right to left, forming an enzyme aggregate in an expressing process, and separating from most soluble impurities in cell lysate by adopting a centrifuging or filtering method; and then releasing the target protein into solution by inducing cutting at a cleavage site so as to achieve the purpose of purification. The method has the characteristics of low cost and simple flow, can be used for laboratory-scale high-throughput protein purification and is also beneficial to industrial-scale protein production.

The invention provides an overhanging type outer scaffold which comprises an outer scaffold body, the outer scaffold body is fixed to the outer side of a building outer wall through wall connecting pieces, and the wall connecting pieces comprise a first wall connecting piece, a second wall connecting piece and a third wall connecting piece. Compared with a traditional overhanging scaffold construction technology, the construction method has the advantages that by means of the construction method of embedded connecting steel plates on beams and fixing I-shaped steel, the problems that the overhanging scaffold has large requirements for I-shaped steel materials, and an embedded wall connecting rod is difficult to control on the aspect of parallelism and construction hole residues are solved.The embedded connecting steel plates do not affect masonry construction, the hidden danger of leakage caused by the fact that holes are reserved during masonry and the potential safety hazard causedby the fact that wall connecting rods are dismantled during worker construction are reduced, and the influence on the building structure is small. An overlong I-shaped steel material does not need tobe arranged to be fixed in a building, materials are saved, and the construction cost is saved. The problem that the parallelism of the embedded wall connecting rods is difficult to control is avoided, the construction efficiency is improved, and the construction period is shortened.

The invention discloses a GC-MS-based plant non-targeted metabolomics sample pretreatment method. The method comprises the steps of 1) mixing up a plant sample, an internal standard substance and a hydrophilic organic solvent, wherein the hydrophilic organic solvent is pre-cooled to be -20 to 4 DEG C; cooling the obtained mixture to be -80 to -10 DEG C, grinding, crushing and conducting the supersonic extraction in the ice-water bath; 2) then respectively adding a lipophilic organic solvent and water, uniformly mixing up, conducting the supersonic extraction in the ice-water bath, conducting the high-speed centrifugation at the temperature of 0 to 16 DEG C, obtaining the aqueous phase and evaporating; 3) adding an oximation reagent, and conducting the oximation reaction at the temperature of 30 to 45 DEG C; 4) finally adding a derivatization reagent and n-hexane, and conducting the derivatization reaction at the temperature of 60 to 80 DEG C. According to the technical scheme of the invention, based on the above pretreatment method, the primary metabolites of a plant sample can be fully extracted, so that the abundant metabolite spectrum data information can be obtained. Meanwhile, both the change of metabolites during the extraction process, and the pollution of liposoluble substances to a gas chromatographic column can be avoided as much as possible. Therefore, the better sample reproducibility is realized.

The invention provides a protecting method, a device and a system for an electric power pylon. A power line is hung and connected with the electric power pylon, and the method comprises the following steps: the stretching force of the power line to the electric power pylon is sensed in real time; if the stretching force of the power line to the electric power pylon reaches a set threshold value, the power line drops off the electric power pylon. In the technical scheme, when the power line is overloaded seriously and the safety of the electric power pylon is in danger, the overloaded power line is ensured to automatically drop off the electric power pylon so as to reduce the stretching force to the electric power pylon, the safety of the electric power pylon is protected, the loss scope is shortened, and the maintenance cycle and the maintenance cost of the power line are greatly reduced.

The invention belongs to the technical field of repair of high-speed railway ballastless tracks and particularly relates to a lifting repair method for a ballastless track with a settled curved section. The lifting repair method for the ballastless track with the settled curved section comprises the steps that after a lifting unit and the lifting quantity of the curved section of the ballastless track are determined, a high-pressure grouting device is adopted, grouting is conducted on a lifting hole and a filling hole in sequence according to determined equipment parameters, hole positions, a grouting sequence, a grouting rhythm and construction steps with a triangle balance lifting method at a certain pressure, grouting materials are injected into the position below the ballastless track through a grouting pipe installed in the grouting hole in advance and are rapidly cured, longitudinal displacement change, transverse displacement change and vertical displacement change of the track are monitored in real time through a measuring device, and then accurate lift, balance supporting and rapid repair are conducted on a settled ballastless track structure. According to the lifting repair method for the ballastless track with the settled curved section, construction is rapid, practicability and reliability are achieved, cost is low, and the method which is rapid and convenient to implement, practical and economical is provided for solving of the problem of settlement of the ballastless track within skylight time.

The invention relates to a vertical un-bonded prestressed anti-seismic strengthening structure of a masonry building. The structure is characterized in that un-bonded prestressed ribs are vertically arranged on each of two sides of a strengthened wall, a coping beam or a wall top force transfer shim block is arranged on the top of the strengthened wall, and the tension ends of the un-bonded prestressed ribs are anchored on the coping beam or the wall top force transfer shim block; a foundation force transfer shim block is arranged on the foundation part of the strengthened wall, and the fixed ends of the un-bonded prestressed ribs are anchored on the foundation force transfer shim block; and by applying a pre-stressing force, the anti-seismic capability of the strengthened wall is greatly improved. The vertical un-bonded prestressed anti-seismic strengthening structure of the masonry building can effectively improve the anti-seismic bearing capacity of the masonry wall and enhance the integrity and the energy dissipation capability of the masonry structure, is beneficial to deformation recovery after seism, is easy and convenient to construct, low in influence and low in manufacturing cost, and belongs to a novel anti-seismic strengthening technology of masonry structures which are worthy of vigorous promotion.

The invention discloses a method and device for measuring the contact force of a pantograph and a catenary, belonging to the technical field of the safety of an electrified railway catenary. The basicidea is that a pantograph head is viewed as a beam model, and a corresponding relation between pantograph strain and contact force is established; and according to strain and acceleration data generated by a pantograph sliding plate due to pantograph and catenary state interaction, real-time pantograph and catenary dynamic contact force and pull-out value are obtained. The device comprises a sensor unit, a signal acquisition unit and a data processing unit. The strain of the pantograph is measured to obtain contact force, related variables are few, and an error generated by an intermediate variable is reduced; while the contact force is measured, a catenary pull-out value can be measured; the equipment installation is simple; a fiber strain sensor is adopted, the size is small, the weightis light, the fiber strain sensor can be embedded into the pantograph sliding plate, and the influence on the structure of the pantograph is small; and the method and device are used for measuring catenary-pantograph system dynamic contact force and pull-out value.

The invention relates to a preparation method of novel high-heat conduction carbon fibers, and belongs to the technical field of preparation of functional carbon fibers. The method comprises the following steps: preparing polyimide fibers through a two-step technology; and charring the polyimide fibers under the following low-temperature constraint conditions: the drafting strength is 0.01-0.5MPa, inert atmosphere is adopted to protect, the heating rate is 1-10DEG C/min, the final charring temperature is 800-1500DEG C, and a final temperature is kept for 20-60min, in order to obtain polyimide-based carbon fibers; and graphitizing the obtained carbon fibers at a high temperature (of 2000-3200DEG C) under the protection of the inert atmosphere at a heating rate of 10-20DEG C/min in order to obtain polyimide-based graphite fibers. The graphite fibers with high crystallization degree, high graphitization degree and high heat conductivity can be obtained through the method.

The invention discloses a method for preparing a high-silicon steel ribbon through using an electric brush composite plating method. The method is characterized in that a pure iron ribbon, a low-carbon steel ribbon or a low-silicon steel ribbon is used as a cathode plating piece ribbon, an electric brush plating anode plate is used as an anode, a layer of iron-silicon iron particle composite plating layer is coated on the cathode plating piece ribbon through using an electric brush composite silicon plating process, a composite plating layer steel ribbon adopting a steel-ribbon substrate as a core part is formed, then the uniform dispersion heat treatment is carried out, silicon-contained particles in the iron-silicon iron particle composite plating layer are uniformly dispersed into the steel ribbon substrate of the core part, and the high-silicon steel ribbon can be continuously prepared. The invention also discloses a continuous silicon steel ribbon preparing device which comprises an unreeling guide device, a conveying device, an electroplating device, a dispersion heat treatment device and a rolling device. The high-silicon plating layer is electrically plated on the cathode plating piece ribbon, then the high-silicon steel ribbon with an excellent magnetic conduction performance is obtained through using a heat treatment process, the simplicity in operation can be realized, characteristics such as high efficiency and continuity in preparation can be achieved, and the preparation cost also can be greatly reduced.

The invention discloses a tube well used for unwatering and pressure-reducing drainage. The tube well comprises a well pipe comprising a precipitation tube, a pressure-reducing water filtering tube, a pressure-reducing well wall tube, an unwatering water filtering tube and an unwatering well wall tube which are sequentially arranged from bottom to top in a penetrating mode, and the joint of the pressure-reducing well wall tube and the unwatering water filtering tube forms a lower pressure-reducing well pipe and an upper unwatering well pipe through a seal board in a partitioning mode. The seal board is provided with a natural flow pipe comprising a water inlet pipe section and a water outlet pipe section, the water inlet pipe section is provided with a water inlet, the water outlet pipe section is sequentially provided with a plurality of water outlet pipe section bodies in the axial direction, each water outlet pipe section body is provided with a side wall water outlet and an upper water outlet, and the side wall water outlets and the upper water outlets are of opening and closing structures. The tube well simplifies drainage procedures, increases the drainage success probability, reduces engineering costs, accelerates the construction progress, increases the deep foundation pit excavation safety coefficient, and simplifies capping work. The invention further discloses a drainage method using the tube well.

The invention discloses a mobile payment device of a mobile phone and a mobile phone containing the mobile payment device. The mobile payment device of the mobile phone comprises a protective shell of the mobile phone, a near field communication (NFC) module, a first Bluetooth module, a first Bluetooth antenna and an NFC antenna, wherein the first Bluetooth module and the NFC antenna are connected with the NFC module respectively; the first Bluetooth antenna is connected with the first Bluetooth module; and the NFC module, the first Bluetooth module, the first Bluetooth antenna and the NFC antenna are arranged on the protective shell of the mobile phone. Compared with the prior art, the NFC module needs to be extended is arranged in the shell of the mobile phone from a structure of the mobile payment device of the mobile phone, thus related design problems confronted by structural engineers, antenna (radio frequency) engineers, electro magnetic compatibility (EMC)/electro-magnetic interference (EMI) engineers and reliability engineers of the mobile phone can be solved in production.

The invention relates to a sensor, in particular to a reinforced concrete embedded type corrosion sensor. The invention provides the reinforced concrete embedded type corrosion sensor which is provided with four pairs of corrosion galvanic couples, a hollow bar, a base and a connecting lead, wherein the corrosion galvanic couple consists of an anode and a cathode, and is fixed on the hollow bar; the hollow bar is fixed on the base; the lead firstly passes through a thread hole of the hollow bar, and then is led out from a groove of the base; and the hollow bar and the base are embedded and filled by epoxy resin. The reinforced concrete embedded type corrosion sensor has small volume, thus having less influence on concrete structure; the structure is simple and firm, so that the corrosion sensor can not be washed away when pouring concrete; the processing is convenient, and the cost-performance ratio is high; the materials are easy to obtain; the corrosion sensor is installed in the concrete before pouring the concrete, so that the corrosion sensor can conduct long-term monitoring on reinforced concrete structure from early stage, and monitoring environment is the same as reinforced concrete environment; the area ratio and distance between the anode and the cathode can be determined and adjusted according to needs or specific experiment tests; and the corrosion sensor can be installed at a pre-monitoring point and an important cross section according to the needs, with convenient installation and operation.

The invention discloses a method for preparing a high-silicon silicon steel ribbon by a hot dipping silicon method. A standby basis ribbon is transmitted and enabled to pass through hot dipping solution in a hot dipping tank, so that a hot dipping high-silicon plating layer is covered on the surface of the standby basis ribbon, the thickness and surface evenness of the hot dipping high-silicon plating layer are modified and controlled to obtain a high-silicon composite plate steel strip blank, and then uniform radiating treatment is carried out to continuously prepare a high-silicon steel ribbon with uniformly distributed silicon elements. The invention also discloses a continuous preparation device of silicon steel ribbon, which comprises an unreeling guide device, a preheating furnace, a plating solution continuous supply device, a hot dipping device, a radiating heat treatment device and a wrapping device which are arranged according to the precedence order of the processes. According to the method, the low-silicon steel ribbon rapidly passes through the high-silicon solution to plate a high-silicon plating layer, and the high-silicon silicon steel ribbon with excellent magnetic property is obtained through heat treatment. The method is simple to operate, and has the characteristics of high efficiency and capability of preparing continuously, and the preparation cost can be greatly reduced.

The invention discloses an aseptic processing preparation method for allogeneic corneal grafts. By virtue of whole treatment on eyeballs, the method comprises the following steps: two-step virus inactivation, namely ultraviolet irradiation and sodium hypochlorite solution soaking, epithelial layer removal, two-step decellularization, namely serum soaking and an osmotic pressure method, cutting and dewatering, and glycerine solution storage. According to the preparation method disclosed by the invention, drying and terminal sterilizing steps are not needed, so that the preparation method is simple in process, short in production cycle and low in production cost; through soft decellularization treatment, the structure and components of the natural corneal stroma are kept to the maximal extent; no significant difference is formed among the transparency, the mechanical strength and the natural corneal stroma; the degradation speed is matched with the regeneration speed of newborn cornea tissues; antigen removal and virus inactivation are thorough; the biocompatibility and the biosecurity are high; the structure and performance of glycerine storage can be kept stable for a long period of time; clinical application is convenient; and corneal transplantation can be carried out instead of the allogeneic cornea.

The invention relates to a railway track structure system, in particular to a long-span ballastless track bridge beam end structure which comprises a transition plate, a beam end track lifting device and a telescopic regulator. The transition plate is located above a beam joint, the lower surfaces of two ends of the transition plate are connected with the upper surfaces of ends of a beam body through supports, the transition plate and a roadbed slab on one side of the beam joint are connected through the track lifting device, and the telescopic regulator used for balancing track longitudinal stress is located on a long-span bridge beam end or a steel track of an adjacent simply-supported beam. The structure is simple in structure, convenient to install and capable of well adapting to large telescopic displacement of a long-span ballastless track concrete bridge beam end and a steel beam end, reduces influences of beam end corners on the ballastless track structure, achieves a track structure cross large beam joint structure and can guarantee stable running of a train.