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174 results about "Penetration process" patented technology

Preparation method of layer-by-layer self-assembled hollow fiber forward osmosis membrane

The invention discloses a preparation method of a layer-by-layer self-assembled hollow fiber forward osmosis membrane. The preparation method comprises the steps of: preparing hollow fiber forward osmosis base film, modifying hollow fiber ultrafiltration base film, repeating layer-by-layer assembly of polycation and polyanion layers, performing interface cross-linking polymerization for preparinga selective functional layer, conducting moisturizing, and carrying out treatment and storage so as to prepare the layer-by-layer self-assembled hollow fiber forward osmosis membrane. The surface of the hollow fiber self-support base film which is prepared by using a phase conversion method is activated firstly, layer-by-layer assembly of polycation and polyanion is repeated on the surface of thefilm so as to form an functional polarization layer for an electrolyte solution, and the polyamide selective layer is prepared through interfacial chemical cross-linking polymerization. The prepared hollow fiber forward osmosis membrane has a controllable thickness and an internal polarization layer with a high charge capacity, and the internal concentration polarization phenomenon can be alleviated effectively during the forward osmosis process; therefore, the hollow fiber forward osmosis membrane can simultaneously obtain high flux and low reverse salt flux, has high filtration separation efficiency, easy cleaning and a long service life, and can be widely applied to seawater desalination and concentration and desalination of brine.
Owner:西安金藏膜环保科技有限公司

Flattening production process of stainless steel

ActiveCN102179424AGood effectEliminate defects such as scratches and pitsStrip steelConductor Coil
The invention relates to a flattening production process of stainless steel, comprising an operation process and operation procedures, wherein the operation process comprises the following steps: a crown block lifts a steel coil to a saddle of a walking beam; the walking beam conveys the steel coil to a saddle; a coiling trolley conveys the steel coil to a preparation station; a shearing machine cuts the head of a steel strip; the coiling trolley conveys and measures the steel coil; the steel coil is automatically centered and loaded to an uncoiler through the coiling trolley; the head of thesteel coil is opened through a guide plate scraper knife, and the steel strip is conveyed into a flattening machine through an inlet pinch roll and a straightener; the steel strip is continuously conveyed to a winding drum of a tension coiler so as to complete a head strip penetration process; strip steel is flattened when accelerated to process speed; after the flattening is completed, a coil stripper trolley strips the steel coil from the tension coiler; the coil stripper trolley conveys the steel coil to the saddle of the walking beam; the walking beam conveys the steel coil, meanwhile, the steel coil is respectively weighed, bundled and subjected to number spraying and the steel coil is lifted into a storeroom through the crown block. By means of the flattening production process provided by the invention, the production efficiency is increased from 3 coils/hour to 5.1 coils/hour and the finished product rate is increased from 90 percent to 99.8 percent.
Owner:SHANXI TAIGANG STAINLESS STEEL CO LTD

Device and method for testing slurry shield excavation surface mud film formation and mud film air tightness under high pressure

The invention discloses a device and a method for testing slurry shield excavation surface mud film formation and mud film air tightness under a high pressure. The device comprises an air pressure source, a mud permeation chamber arranged in a constant temperature cabinet, a back pressure device and a water collection device, wherein the mud permeation chamber has a steel model tube structure and is fixed on a base by a bolt; a groove is formed in the base; a porous copper plate, a steel screen mesh and a piece of geotechnical cloth are sequentially laid in the groove from bottom to top; a drain valve is arranged on the side face of the base; a barrel top cover is connected with a peripheral wall by a bolt, and an air inlet and a grouting hole are formed in the barrel top cover; the mud permeation chamber is connected with an output end of the air pressure source by an air inlet pipe passing through the air inlet hole; the water collection device is a double-layer glass pipe, the bottom of the water collection device is provided with a drain valve and is connected with the drain valve arranged on the side face of the base by a drain pipe, and the top of the water collection device is connected with another output end of the air pressure source by the back pressure device. The method provided by the invention is simple and feasible; the device is capable of simulating a penetration process of mud of a slurry shield excavation surface in the stratum by means of a laboratory test so as to test the quality of a mud film; the device can bear the maximum pressure of 2.5MPa.
Owner:HOHAI UNIV

Flexible wall permeameter capable of measuring volume changes

ActiveCN105806766AReal-time monitoring of volume changesPermeability/surface area analysisWater leakageVolume variation
The invention discloses a flexible wall permeameter capable of measuring volume changes. The flexible wall permeameter comprises a pressure chamber, the top end of the pressure chamber is a pressure chamber top plate, the bottom end of the pressure chamber is a pressure chamber bottom plate, a sample containing chamber is installed in the pressure chamber, a top cap is installed at the top end of the sample containing chamber, and a base is installed at the bottom end of the sample containing chamber; the flexible wall permeameter is characterized by further comprising a volume change sensor and a data collector, the volume change sensor is installed at the pressure chamber top plate and communicated with the interior of the pressure chamber through a pipeline, and the volume change sensor is in junctional communication with the data collector. By means of the flexible wall permeameter capable of measuring the volume changes, the problem of rigid wall permeameter side wall water leakage is solved, and sample volume changes in the penetration process can be monitored in real time; the stability of pore water pressure of the top and the bottom of a sample can be quantificationally measured; permeability coefficient monitoring of different samples in specifications related to geotechnical engineering is achieved.
Owner:LANZHOU UNIVERSITY

A method for simulating progressive failure, like solid-liquid phase transformation behavior of rock and soil media

The invention relates to a rock-soil medium progressive failure, solid-like. The smooth particle dynamics (SPH) method is improved from three aspects: boundary condition, constitutive relation and artificial stress, so that the SPH can reproduce the progressive failure of rock and soil media under strong earthquake dynamic condition, solid-like-liquid phase change behavior, constructing slip-freeboundary modified by seismic wave velocity to apply seismic wave, creating free-field boundary to prevent seismic wave reflection, using particle rheology for reference, combining Drucker-Prager constitutive model and Newtonian fluid constitutive model construct a new unified constitutive model, which can describe the phase from sliding (solid-like) to flowing (liquid-like) in geotechnical media.The invention effectively reproduces the kinematic characteristics of the start-up, high-speed flow and accumulation process of the landslide, analyzes the progressive failure of the rock and soil medium and the penetration process of the sliding surface under the action of the strong earthquake, thereby accurately predicting the sliding distance, and reasonably assesses the earthquake-triggered landslide. The hazard caused by debris flow provides scientific basis for the planning and design of earthquake prevention and disaster reduction.
Owner:TONGJI UNIV

Partially reinforced composite material bulletproof helmet

PendingCN108955385ASolve the problem of unstable back convex height side wallGuaranteed back convex deformation heightPersonal protection gearFiberCarbon fibers
The invention relates to a partially reinforced composite material bulletproof helmet, and belongs to the technical field of composite material bulletproof helmets. The helmet comprises an outer bulletproof layer, an intermediate buffer layer and an internal rigid reinforcement layer successively from outside to inside, and the interface layers of the outer bulletproof layer, the intermediate buffer layer and the internal rigid reinforcement layer are bonded into shape. The outer bulletproof layer is mainly composed of laminating and hot pressing pre-impregnated fabric which is formed by fiberimpregnated resin, the intermediate buffer layer is composed by compositing a fiber or foam structure material with a honeycomb hollow structure and a resin material, and the internal rigid reinforcement layer is composed of a composite material of high-modulus carbon fiber reinforced thermosetting resin, wherein the thicknesses of the internal rigid reinforcement layer of the forehead position and the hindbrain position is larger than that of other parts. According to the partially reinforced composite bulletproof helmet, by using the characteristics of the composite material, through partial arrangement of the reinforcement layer in the bulletproof helmet, the back-convex deformation height of key positions is ensured, and the problem of unstable side wall of the back-convex height in the projectile penetration process is greatly solved.
Owner:朱波 +6

Method for making leaf vegetable pickled vegetable by dry ice quick-frozen forward/back high pressure broth repeated penetration process

The invention discloses a method for making leaf vegetable pickled vegetable by a dry ice quick-frozen forward/back high pressure broth repeated penetration process. The method is characterized in that a process of separation and air drying of stalk and leaves and a dry ice quick-frozen process are employed for pretreating the leaf vegetable raw material, the leaf vegetable raw material is stored in a freezer at the temperature of -18 DEG C, after a broth is prepared, the forward/back high pressure repeated penetration process is employed for rapidly making the Szechwan leaf vegetable pickled vegetable having a traditional fermentation local flavor. According to the process provided in the invention, the leaf vegetable pickled vegetable raw material can reach the purpose of long-term storage without high salinity pickling, salt amount is reduced by 30%-35%, the content of nitrite is reduced by 90%-95%, no high salinity waste water is discharged, the production efficiency is increased by more than 300%, the serialization, automation, standardization and large scale production of Szechwan pickled vegetable can be realized, and the method provided in the invention has a landmark innovation revolution to a traditional production mode to the Szechwan pickled vegetable.
Owner:XIHUA UNIV

Missile-borne penetration attitude calculating device based on combination of geomagnetism and micro-inertia navigation information

The invention relates to a missile-borne penetration attitude measuring device, in particular relates to a missile-borne penetration attitude calculating device based on combination of geomagnetism and micro-inertia navigation information, and solves a problem of lack of an attitude calculating device aiming at traditional payload penetration process at present. The missile-borne penetration attitude calculating device based on the combination of geomagnetism and micro-inertia navigation comprises a circuit body (1) and a buffering protective device arranged at the periphery of the circuit body (1), wherein the signal line of the circuit body (1) is led to the outside of the buffering protective device; the circuit body (1) comprises a geomagnetism/micro-inertia navigation measurement combination unit, a missile-borne attitude calculating unit, a missile-borne real time data recording unit, a power supplying and distributing unit and a starting unit; and the geomagnetism/micro-inertia navigation measurement combination unit comprises a signal modulating module, the input end of the signal modulating module is respectively connected with a triaxial gyro sensor and a triaxial geomagnetic sensor, and the output end is connected with an A/D (analog to digital) conversion module. The missile-borne penetration attitude measuring device is reasonable in design and simple in structure.
Owner:ZHONGBEI UNIV

Free falling type ball-shaped penetrometer with propeller

The invention belongs to the technical field of ocean engineering and relates to a free falling type ball-shaped penetrometer with a propeller. The free falling type ball-shaped penetrometer with thepropeller does not need any other loading device during measurement and can penetrate into soil of seabed by kinetic energy and gravitational potential energy for measurement, thereby being simple inoperation process. The main measurement unit of the free falling type ball-shaped penetrometer with the propeller is a ball-shaped penetrometer body at the front end, which mainly bears end bearing resistance of soil, dragging resistance and pressure of covering soil during a power penetration process; data collected by an acceleration sensor and a force sensor can be applied to inverting relevantparameters of soil body such as soil body strength and rate effect parameters; the added propeller can effectively the penetrating depth of the free falling type ball-shaped penetrometer and increasethe measurable depth range and meanwhile enhance the directional stability of the free falling type ball-shaped penetrometer during falling and avoid rotation of the free falling type ball-shaped penetrometer. By adding the force sensor and combining the measured value of the acceleration sensor, the free falling type ball-shaped penetrometer can further improve the measurement precision.
Owner:DALIAN UNIV OF TECH

Self-elevating offshore platform-based pile penetration quality dynamic-evaluation method

The invention discloses a self-elevating platform-based pile penetration quality dynamic-evaluation method, which comprises the following steps of firstly determining the bearing capacity, i.e. stratum piercing pressure [sigmap], of a unit area of a corresponding stratum at corresponding coordinates by marine geological survey and laboratory tests, and employing the data as a standard parameter for safety control over the pile penetration of a self-elevating platform; then measuring and calculating a stratum depth reached by the end part of a pile shoe of each pile leg and actual unit area ballast force sigmaf in real time in a pile penetration process of the platform, and calculating a relative piercing safety coefficient n=[sigmap]/sigmaf to determine the reliability of the pile penetration position of the self-elevating platform. According to the self-elevating offshore platform-based pile penetration quality dynamic-evaluation method, gaps in the in-situ pile penetration quality judgment of the self-elevating offshore platform in the prior art are effectively filled in, technical support is provided for offshore oil engineering, and the operation safety and reliability of the self-elevating platform are maximally ensured.
Owner:东营市胜软石油技术开发有限公司
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