41 results about "Pressure solution" patented technology

A multi-scale finite-volume (MSFV) method to solve elliptic problems with a plurality of spatial scales arising from single or multi-phase flows in porous media is provided. Two sets of locally computed basis functions are employed. A first set of basis functions captures the small-scale heterogeneity of the underlying permeability field, and it is computed to construct the effective coarse-scale transmissibilities. A second set of basis functions is required to construct a conservative fine-scale velocity field. The method efficiently captures the effects of small scales on a coarse grid, is conservative, and treats tensor permeabilities correctly. The underlying idea is to construct transmissibilities that capture the local properties of a differential operator. This leads to a multi-point discretization scheme for a finite-volume solution algorithm. Transmissibilities for the MSFV method are preferably constructed only once as a preprocessing step and can be computed locally. Therefore, this step is well suited for massively parallel computers. Furthermore, a conservative fine-scale velocity field can be constructed from a coarse-scale pressure solution which also satisfies the proper mass balance on the fine scale. A transport problem is ideally solved iteratively in two stages. In the first stage, a fine scale velocity field is obtained from solving a pressure equation. In the second stage, the transport problem is solved on the fine cells using the fine-scale velocity field. A solution may be computed on the coarse cells at an incremental time and properties, such as a mobility coefficient, may be generated for the fine cells at the incremental time. If a predetermined condition is not met for all fine cells inside a dual coarse control volume, then the dual and fine scale basis functions in that dual coarse control volume are reconstructed.

A multi-scale finite volume method for simulating a fine-scale geological model of subsurface reservoir is disclosed. The method includes providing a fine-scale geological model of a subsurface reservoir associated with a fine-scale grid, a coarse-scale grid, and a dual coarse-scale grid. A coarse-scale operator is constructed based on internal cells, edge cells, and node cells on the fine-scale grid that are defined by the dual coarse-scale grid. Pressure in the dual coarse-scale cells is computed using the coarse-scale operator. Pressure in the primary coarse-scale cells is computed using the computed pressure in the dual coarse-scale cells. A display is produced using the computed pressure in the primary coarse-scale cells. An iterative scheme can be applied such that the computed pressure in the primary coarse-scale cells converges to the fine-scale pressure solution and mass balance is maintained on the coarse-scale.

The invention relates to an embedded-method anti-leakage technology for high-pressure water and gas conveyance. The embedded-method anti-leakage technology is characterized in that: a steel pipe flange plate connector is adopted, wherein flange plates are hollow cylindrical bodies, each flange plate is equal in thickness and height, the two flange plates are connected with a pipe in a flat welding way, and deletion of a traditional operation procedure for turning ledges of the flange plates is reduced; in addition, a circle of groove is respectively formed on a pair of flange plants at two connectors of a front pipe and a rear pipe in a turning way, a circle of groove is formed only on one flange plate in a turning way when the pressure of conveyed water or gas is smaller than high pressure, and then O-shaped seal rings are embedded into the groove; the seal rings can be customized or self-made, wherein the self-made method of the O-shaped seal rings comprises the following steps of: cutting off a strip-shaped circular plastic rope to form bevels and then gluing, wherein the depth of the groove of each flange plate is 1 / 3-2 / 5 of the diameter of the rope; and the front flange plate and the rear flange plate are connected by bolts. The embedded-method anti-leakage technology can also be used for a pressure pipe of a concrete pressure solution bath, one flange plate with electric welding connection is embedded onto the outer circle of the steel pipe and is then poured into concrete of the pressure solution bath, and therefore the purposes of sealing and anti-leakage can be achieved.

The invention relates to an analyzing and optimizing method for a hydrostatic guideway to inhibit inertia force impact, and belongs to the technical field of hydrostatic support and lubricating design. The hydrostatic guideway is widely applied to a heavy machine tool. When a gantry of the heavy machine tool is started or braked, the heavy machine tool is swung because of the influence of the inertia force, so the influence on the processing accuracy is caused, and the risk exists; when the hydrostatic guideway is designed, the requirement of bearing capacity needs to be met, and the influence of starting and stopping impact needs to be considered. The analyzing and optimizing method has the advantages that according to a hydrostatic guideway model of the heavy machine tool, a Reynolds equation for the change of oil film thickness is introduced; the bending deformation and linear offset are simultaneously introduced into the oil film thickness change process, so as to simulate the actual working condition; a finite difference method is used, and the iteration is performed by a successive overrelaxation method to solve a numerical solution of the pressure; according to the pressure solution and the oil supply parameters, the change of the bearing property under the tilting condition caused by different inertia forces is analyzed; the optimizing scheme is provided for the analysis results under the condition of attempting different oil pad structures, and the capability of the hydrostatic guideway resisting the inertia force impact is improved.

The invention discloses an AGV containing device with a good buffer property. The buffer containing device comprises a base plate, a hydraulic cylinder, a horizontal adjusting plate, a hydraulic box cover plate and a containing unit. A hinged ball body is arranged at the upper end of a center rod of the center of the base plate, and the upper end of the horizontal adjusting plate is provided with a hydraulic frame and a sliding hole; a pressure sensor array is arranged on the bottom surface inside the hydraulic frame, and a hinged ball sleeve is arranged in the center of the lower side of the horizontal adjusting plate; the hinged ball body is arranged in an inner cavity of the hinged ball sleeve, and the hinged ball body and the hinged ball sleeve form a spherical kinematic pair; a hydraulic cylinder is arranged in a hydraulic cylinder installation groove, and one end of a hydraulic rod inside the hydraulic cylinder is in hinged connection with a U-shaped connecting piece; a pressure solution is contained in the hydraulic frame, and a sliding rod of the lower end of the containing unit is arranged in a sliding hole; and the outer side of the siding rod is sleeved with a buffer spring. The AGV containing device is simple in structure, reasonable in design, good in horizontal adjusting effect, excellent in damping property, complete in object protection and capable of being widely applied and popularized.

The invention provides a high-performance resistive-type humidity sensitive sensing element. The high-performance resistive-type humidity sensitive sensing element comprises a humidity-sensitive sensing element substrate and a humidity-sensing film coated on the surface of the humidity-sensitive sensing-element substrate, the humidity-sensing film is generated by a normal-pressure solution polymerization reaction on a catalyst azodiisobutyronitrile, a solvent tetrahydrofuran, styrene and 4VP under nitrogen environment, and the humidity-sensing film is fixed on the surface of the humidity-sensitive sensing element substrate through vacuum drying. The invention also provides a preparation method of the resistive-type humidity sensitive element. The resistive-type humidity sensitive element has the advantages of fast induction speed, good stability, good weatherability, and long life, has short time consuming during a making process, and has obvious market value.

The invention discloses a high-pressure solution dehumidification and afterheat recovery device with adjustable pressure dew point, and a high-pressure solution dehumidification and afterheat recoverymethod. The device comprises a compressed air treatment system, an ordinary pressure solution regeneration system and a water chilling unit module, wherein the compressed air treatment system comprises an ordinary pressure dehumidifier and a high-pressure dehumidifier in mutual connection; the water chilling unit module comprises a condenser, a compressor, an evaporator and a water tank; bottom liquid outlets of the ordinary pressure dehumidifier and the high-pressure dehumidifier are respectively connected with a heat exchanger and the condenser, and are finally connected with a dilute solution liquid inlet of the ordinary pressure solution regeneration system through the heat exchanger and the condenser; top liquid inlets of the ordinary pressure dehumidifier and the high-pressure dehumidifier are respectively connected with a concentrated solution outlet of the ordinary pressure solution regeneration system through a solution cooler. The device and the method achieve the effects ofreducing the energy consumption of an air compressor and the compressed air drying process and the improving the energy source utilization rate. In addition, the requirements on different dry degreecompressed air between -40 DEG C and 0 DEG C are met; the lower pressure dew point and the adjustability are realized.

The invention discloses a hydraulic auxiliary splitting device for rock breakage. The hydraulic auxiliary splitting device for rock breakage comprises a columnar splitter used for blocking a hole mouth of a pre-formed hole in rock, wherein the pre-formed hole is filled with a pressure solution, and a first end of the splitter is conical and stretches into the hole mouth. According to the hydraulicauxiliary splitting device, the splitter blocks the pre-formed hole filled with the pressure solution, so that the impact force applied to the splitter by a mechanical device is transmitted to all portions in the pre-formed hole through the pressure solution, and the pre-formed hole cracks from a weak portion to achieve a breakage effect; no explosive is used, so that various explosion dangers are prevented; waiting for expansion with an expanding agent is not needed, so that the efficiency is improved, and the construction progress is not affected. The invention further discloses a hydraulicsplitting method for rock breakage. The hydraulic splitting method is applied to the hydraulic auxiliary splitting device and can avoid explosion dangers and improve the efficiency.

The present invention relates to a well test explanation method for cave volume calculation. The method comprises a first step of building a well test model according to a combination relationship of a crack, a cave and a wellbore of a seam type oil reservoir and measurement parameters of the crack, the cave and the wellbore; a second step of acquiring a real space bottomhole pressure solution according to the well test model; and a third step of fitting by using the real space bottomhole pressure solution and measured bottomhole pressure data so as to acquire parameters about crack permeability, a wellbore reservoir coefficient, a crack length, a crack cross-sectional area, and a cave volume. Through adoption of the well test explanation method for cave volume calculation, a corresponding well test explanation model is built according to different crack combination relationships, so that the volume of each cave is explained, further, the length and cross-sectional area of the crack or a seepage channel are obtained.

The invention discloses a three-way tensile pressure-high hydraulic gradient action concrete corrosion test device and method. The method comprises applying constant compressive stress to a specimen through forward preload, applying reverse preload to a tensile steel plate bonded to the surface of the specimen and tensile bolts through a seal chamber steel plate in the tension side as a reverse force structure to realize constant tensile stress loading, applying axial compressive stress to a loading bar with a protection shell along a longitudinal direction, monitoring the stress state of the specimen in the corrosion process through tension and pressure sensors and supplying preload and axial pressure in good time. Through combination of sealing of the specimen tension side with the structure glue and a high elastic rubber tube, the pressure solution flows into the specimen from the top and flows out of the specimen from the bottom so that hydraulic gradient action is formed, and a water pressure sensor monitors corrosion solution pressure in the solution chamber in the corrosion process and supplies the solution in good time to keep stable pressure. In the solution chamber, one or more osmotic corrosion environments such as sulfate and chloride environments are provided. The device has a string structure and can carry out three groups of tests simultaneously.

The invention discloses a method for producing garbage-derived fuel and diesel from urban garbage, which includes bag breaking process, primary crushing process, magnetic separation process, winnowing process, secondary crushing, sterilization and drying, mixing, molding, catalytic decompression Depolymerization, distillation and other steps. The invention overcomes the problems of waste of valuable garbage, occupation of land resources and discharge of harmful gas caused by the current garbage treatment. In the present invention, the catalytic low-pressure depolymerization process for producing diesel oil from the combustible garbage screened out requires low reaction temperature and pressure, but the synthesis efficiency is very ideal, laying a solid foundation for the industrialization of large-scale devices in the future.