18 results about "Permeameter" patented technology

The invention discloses an earth and rockfill dam material seepage deformation inspection system and method, and relates to the technical field of earth and rockfill dam engineering.The method comprises the steps that a sample of an earth and rockfill dam material is prepared and arranged in a test cavity of a permeameter; maintaining a steady-state seepage field in the sample; in the maintaining process of the steady-state seepage field, acoustic response signals and thermal response signals excited in the sample due to the seepage effect are synchronously collected through a distributed sensing system arranged around the sample; analyzing the acquired acoustic response signal and thermal response signal, and identifying and positioning an acoustic abnormal area with abnormal sound energy release and a thermal abnormal area with abnormal thermal change; and after the early warning signal is generated, the spatial and temporal distribution characteristics of the acoustic abnormal region and the thermal abnormal region are used as input, a parameter distribution field representing the damage evolution of the microstructure in the sample is calculated through a coupled physical inversion algorithm, and the permeability stability of the sample is evaluated based on the parameter distribution field.

The application discloses a kind of permeameters for pressurized concrete detection, including the hollow cylindrical test mould of appearance, for loading concrete sample;The inner cavity wall of the test mould is equipped with deformation sealing device, for sealing concrete;The test mould is equipped with pressurizing device, for pressurizing and decompressing deformation sealing device;The test mould is equipped with blocking device, for limiting pressurizing device, further, the deformation sealing device includes the liquid storage groove opened in the inner cavity wall of test mould, and the sealing layer is fixedly connected on the liquid storage groove.The application is provided with elastic sealing layer, when not pressurized, concrete sample can be easily placed into test mould after being wrapped with paraffin, and the sealing layer is expanded and extruded on the inner wall of concrete placed into test mould by the pressurizing of pressurizing screw, the pressurized sealing is completed, and the cumbersome operation of existing concrete sample placed into test mould is removed under the premise of ensuring high-pressure sealing.

This invention discloses a flexible wall device and method for measuring the gas permeability and diffusion coefficients of unsaturated soil. It mainly consists of a gas washing device, a confining pressure-volume change system, a wet-dry cycle control system, and a gas measuring device. The wet-dry cycle control system includes a humidity controller and valves. The gas measuring device includes a top cover, a cylindrical wall, a base, an upper cavity, and a lower cavity. The top cover, cylindrical wall, and base are connected by bolts and nuts. The base outlet is connected to the gas washing device, a gas supply device, the wet-dry cycle control system, and the gas measuring device. From bottom to top, the lower cavity, the sample, the upper cavity, and the control rod are arranged between the base and the top cover. This device offers high precision, overcoming the measurement errors of gas permeability and diffusion coefficients caused by the sidewall dominant flow in rigid wall permeameters. It can measure the gas permeability, diffusion coefficient, and volume change of samples under wet-dry cycles and different stress conditions, providing a reliable measurement tool and method for assessing gas migration in unsaturated soil.

The utility model belongs to the technical field of impermeability detection and calibration, and particularly relates to a permeameter calibration device which comprises a plurality of calibration flanges which are respectively driven by a plurality of abutting driving mechanisms. The plurality of abutting driving mechanisms respectively drive the plurality of calibration flanges to abut against a plurality of test molds of the permeameter, a pressure gauge is arranged in each calibration flange, the device further comprises a lifting plate, the plurality of abutting driving mechanisms are fixed at the bottom of the lifting plate, and the lifting plate is driven by a lifting rotation driving mechanism. According to the utility model, the plurality of calibration flanges are used for calibrating the plurality of test molds at the same time, the calibration efficiency is higher, and the plurality of calibration flanges are driven to abut against the test molds at the same time through the cooperation of the lifting rotation driving mechanism and the plurality of abutting driving mechanisms, so that the calibration efficiency is further improved.

The utility model relates to the technical field of anti-permeability instruments, and provides an anti-permeability instrument for concrete, which comprises a detection table, the top of the detection table is fixedly connected with a connecting ring, a rubber mat is embedded in the connecting ring, the top of the rubber mat is fixedly connected with a connecting ring, the top of the connecting ring is fixedly connected with a test mold, and the test mold is fixedly connected with a test block. Clamping grooves are formed in the two sides of the connecting ring, a connecting plate fixedly connected with the detection table is arranged on the side face of each clamping groove, a handle is rotationally connected to one side of each connecting plate, the handles are arranged and rotated to drive the forward and reverse threaded rods to rotate, and at the moment, the two sets of fixing plates can horizontally get close to the interiors of the clamping grooves under the action of limiting rods; when the test mold needs to be disassembled, the handle is screwed to control the two sets of fixing plates to move out of the clamping groove, and the purpose of quick assembly and disassembly is achieved.

A permeameter device comprising a pedestal base, wherein said pedestal base comprises an inner raised wall and an outer raised wall, wherein the inner raised wall is lower in height than the outer raised wall, a trough defined between the outer and inner walls of dimensions to accept therein a cylindrical tube, and at least one passage, having an inner port on said inner wall and extending through the outer wall through an outer port for fluid connection through said passage, and a loading rod, wherein a sample is prepared to fit within the cylindrical tube.

This utility model relates to a pulse permeability meter, belonging to the field of oil and gas exploration and development technology. The pulse permeability meter includes a confining pressure pump, a clamp, an upper standard chamber, a lower standard chamber, a gas storage container, and a gas source pump. The inlet end of the clamp is sequentially connected to the upper standard chamber, a pressure regulating valve, a gas storage container, a shut-off valve, and the gas source pump via an inlet valve. The outlet end of the clamp is connected to the lower standard chamber. The outside of the clamp is connected to the confining pressure pump via a confining pressure valve. A parallel pipeline is connected between the inlet valve and the upper standard chamber. The end of the parallel pipeline is connected to the outlet end of the clamp. This pulse permeability meter has a compact structure and ingenious design, solving the problem of relatively inaccurate detection accuracy when using a closed method for downstream rock sample detection in existing detection methods. It is particularly suitable for the needs of rock sample permeability detection.

The utility model relates to the technical field of permeameters, and discloses an automatic pressure regulating concrete permeameter which comprises a bottom frame, a vertical cylinder used for supporting is clamped on the upper surface of the bottom frame, a vertical rod used for adjusting is slidably connected to the top of the vertical cylinder, a permeameter body is fixedly installed on the top of the vertical rod, and a pressure regulating device is arranged on the permeameter body. A limiting frame is fixedly installed on the side face of the permeameter body, a supporting rod is slidably connected to the top of the limiting frame, and a protective cover is fixedly installed on the side face of the supporting rod. According to the automatic pressure-regulating concrete permeameter, the vertical cylinder and the vertical rod are arranged in a matched manner, so that the device is more convenient and practical, and a worker can start a motor on the vertical cylinder to drive the vertical rod to move upwards or downwards before using the device, so that the overall height of the device is regulated; and a worker can adjust the height of the device according to the height of the worker, so that the worker feels comfortable when operating the device.

The invention discloses a correction method and system of a rock gas permeability tester, and relates to the technical field of tester error correction and intelligent calculation, and the correction method comprises the following steps: obtaining measurement data of a rock sample, preprocessing, executing division and splicing operation, generating a measurement vector, and performing population initialization; quantization and binding operations are executed, and a fitness function is defined; a fitness function value is calculated, a sorting list is generated, Levy flight is used for position iteration-updating, a search space boundary is set, constraint adjustment of the position is executed in combination with the iteration-updating position, and a detection position is obtained; on the basis of the detection position, the corresponding data is intercepted to correct the measurement data, the obtained corrected data is stored, the rock gas permeability measurement data can be efficiently and accurately corrected, and the accuracy and stability of the measurement result are greatly improved.

This utility model relates to a permeameter for engineering quality testing, belonging to the field of engineering quality testing technology. It includes a housing with a pressing structure on its outer wall and a separation structure on its outer wall. The bottom of the housing has a discharge sealing structure. The separation structure includes side plates fixedly connected to the left and right sides of the housing. Four support seats are fixedly connected to the bottom of each side plate, and a base plate is fixedly connected between the four support seats. A first cylinder is fixedly connected to the top of the base plate, and a placement platform is fixedly connected to the telescopic shaft of the first cylinder. In this permeameter, the first cylinder pushes the placement platform upwards, scraping and cleaning the soil adhering to the inner wall of the housing. An electric slide and connecting rod move the separation blade closer to the soil. The cutting surface of the separation blade is inclined.

The application discloses a kind of mud balance shield mud film identification permeameter test device and method, it is related to geotechnical engineering test field, it includes organic glass cylinder, air compressor, pressure gauge, pore water pressure gauge and ground penetrating radar detection system.The organic glass cylinder forms closed test cavity, air compressor is controlled air pressure to cavity interior by gas pressure regulating valve to drive mud penetration soil sample to generate mud film, and pressure gauge and pore water pressure gauge are used to monitor gas pressure in cavity and internal pore water pressure of medium.Radar antenna of ground penetrating radar detection system is installed in the way of emission surface no gap adhering to the top surface of organic glass cylinder, and the center normal direction is perpendicular to the layered interface of medium in cylinder, electromagnetic wave is vertically incident to obtain the best reflection echo signal.The application integrates ground penetrating radar and permeameter device structure, realizes the real-time nondestructive detection of mud film formation process.

The invention discloses an integrated bentonite permeability coefficient measuring device and method under a thermal-chemical condition, and belongs to the technical field of bentonite permeability coefficient measurement, the integrated bentonite permeability coefficient measuring device comprises a water pressure generator, a permeameter and a liquid volume measuring assembly which are communicated through guide pipes, and a soil sample is arranged in the permeameter; the water-chemical conversion system is arranged between the water pressure generator and the permeameter through a guide pipe and is provided with deionized water, spacer fluid and a chemical solution; the temperature controller is in communication connection with a first heating belt, a heating plate and a second heating belt, the first heating belt is arranged on the water-chemical conversion system, the heating plate is arranged at the bottom of the permeameter, and the second heating belt is arranged on the outer wall of the permeameter; and the data processing system is in communication connection with the water pressure generator and is used for setting a pressurization path and pressure of water, recording water inflow and pressure data in real time and calculating a permeability coefficient based on the Darcy law. The problems of soil leakage, instrument corrosion and temperature control during bentonite permeability coefficient measurement in a high-temperature corrosion environment are solved.

This invention provides a method for detecting and calculating the austenite content in steel based on a permeability meter, relating to the fields of steel and electromagnetics. Based on the theoretical differences in saturation magnetization of different phases in ferromagnetic materials, this invention establishes a theoretical calculation model and detection method for measuring austenite content using a permeability meter. A standard-prepared sample is placed in a magnetic pole shoe, and the magnetic field strength H corresponding to the maximum permeability of the ferromagnetic material is first measured. μ Then at ≥1.5H μ Under a magnetic field strength of J, the polarization intensity of the magnetic field strength at multiple points was measured at continuous intervals. m Then, based on the saturation magnetization approximation law and derivation law, the saturation magnetization Js is fitted and solved. Finally, the austenite content is determined according to the theoretical calculation model of austenite content. The method described in this invention solves the influence of the constantly changing effective magnetic path length of traditional magnetometers on the measurement results. The method for determining austenite content is simple, has a solid theoretical basis, high measurement accuracy, and strong data repeatability.

The utility model provides an unattended intelligent permeameter. The unattended intelligent permeameter comprises an intelligent control main water inlet device and a plurality of intelligent permeation measurement units, each intelligent permeation measurement unit comprises a cylinder body, a top pressurization system and a bottom water inlet structure; the barrel body comprises a water pressure sensor, a flow recorder, a water return pipe and a barrel body; and the bottom water inlet structure comprises a uniformly distributed water inlet plate, a water inlet pipe and a sealing rubber ring. The device has the following advantages: (1) three samples can be simultaneously subjected to a penetration test, errors caused by soil weathering are reduced, and the penetration test efficiency is improved; (2) the crushing condition of the sample is convenient to observe, and the strength is higher; (3) accurately measuring water pressure at different heights; (4) the overflow water flow is accurately measured; manual errors are eliminated, and the sample measurement accuracy of the permeameter is improved. Unattended operation is achieved, the workload of workers is reduced, data are collected regularly, and the water pressure change trend in unit time can be accurately analyzed.

The invention belongs to the technical field of geotechnical engineering, and discloses a penetration test device and method. The closed pressurizing water tank is provided with a pressurizing air inlet and is connected with a liquid level detection piece and a pressure detection piece; the permeameter comprises a bottom permeable stone, a sample, a top permeable stone and a water collecting cover plate, the sample is clamped between the bottom permeable stone and the top permeable stone, the water collecting cover plate is arranged above the top permeable stone, and a communicated first channel is arranged between the closed pressurizing water tank and the permeameter; water in the closed pressurizing water tank can flow to the bottom permeable stone through the first channel, sequentially flows through the bottom permeable stone, the sample, the top permeable stone and the water collecting cover plate and flows out of the water collecting cover plate to realize seepage; and the air source device is connected with the pressurizing air inlet and can inject air into the closed pressurizing water tank for pressurizing. The controllable pressure generated by the air source device replaces a traditional variable water head pipe, the testing efficiency and precision are improved, and the device is more suitable for a scene with limited space.

The utility model discloses a supporting mechanism of an impermeability instrument drawing plate, which comprises a rack, a plurality of layers of supporting plates are arranged in the rack, a plurality of groups of impermeability test devices are arranged between adjacent supporting plates, the adjacent supporting plates are connected through a self-locking device, and the self-locking device comprises a driving device, a bolt and a drawing plate. The plug pins are arranged in the supporting plates, the pulling plates are arranged at the bottoms of the supporting plates and connected with output shafts of the driving devices, the plug pins are used in cooperation with the pulling plates on the supporting plates on the next layer, the plug pins are provided with guiding bearing pieces, and the pulling plates are located on the guiding bearing pieces. According to the utility model, the plurality of guide bearing pieces are arranged on the bolt, so that the middle part of the drawing plate can be supported, and the guide bearing pieces also play a role in guiding when the drawing plate moves, so that the drawing plate can be used for a long time.

The utility model discloses a permeameter for engineering quality detection, which comprises a permeameter main body and a test mold arranged at the top of the permeameter main body, guide rails are fixedly connected to the top of the permeameter main body and are positioned on two sides of the test mold, sliding chutes with trapezoidal structures are formed in the top sides of the guide rails, and positioning blocks with trapezoidal structures are connected in the sliding chutes in a sliding manner; the top side of the movable frame is fixedly connected with a nut, the inner side of the nut is movably connected with a connecting rod, the side, close to the top end and the bottom end, of the connecting rod is provided with a threaded structure connected with the nut in a matched mode, the top end of the connecting rod is fixedly connected with a hand wheel, and the bottom end of the connecting rod is rotationally connected with the top of the test mold. Through the structure, the trouble caused by repeatedly lifting, placing and moving the test mold when a sample is taken and placed is avoided, the use is more convenient and faster, the taking and placing process of the test mold is simplified, the labor amount of detection personnel is reduced, and the test safety and efficiency are favorably improved.

The invention discloses a portable earthen ruin in-situ permeameter which is structurally composed of a water storage barrel, a pressure regulating bin, a funnel, a permeable stone, a pressure regulating pipe, a gas conveying pipe, two valves, a valve with a barometer, a water level sensor and a notebook computer, the bottom of the water storage barrel is open, the permeable stone is placed at the opening, the number of the valves is two, and the pressure regulating pipe is arranged in the water storage barrel. Comprising a first valve and a second valve, the two valves and a funnel are all arranged on the upper portion of a water storage cylinder, the first valve is located at the joint of the funnel and the water storage cylinder, a water level sensor is arranged in the water storage cylinder, a notebook computer is connected outside the water storage cylinder, the periphery of a pressure regulating bin is sealed, and the upper portion of the pressure regulating bin is connected with a pressure regulating pipe and a valve with a barometer. The side edge of the water storage cylinder is connected with a second valve. The pressure adjusting bin is communicated with the water storage cylinder through an air conveying pipe. The portable earthen ruin in-situ permeameter provided by the invention is high in measurement precision and low in cost, the portability is improved, and the automation of reading is realized.