45 results about "Pressure experiment" patented technology

The invention relates to the field of high-pressure pressure distribution calibration and imaging, in particular to a high-pressure diamond anvil cell internal pressure calibration / imaging system and method based on wide-field optical detection magnetic resonance. The invention discloses a high-pressure diamond anvil cell internal pressure calibration / imaging system based on wide-field optical detection magnetic resonance. The system comprises a fluorescence excitation and collection unit which comprises a wide-field optical detection magnetic resonance pressure distribution imaging light path based on nano-diamond NV color center fluorescence and a pressure calibration light path based on a ruby microsphere fluorescence spectrum. Compared with the prior art, the technical effects of the invention are that a traditional single-point detection mode is broken through through a wide-field microscopic imaging method, submicron spatial resolution and 0.0045 GPa / Hz1 / 2 noise measurement sensitivity are realized, and a brand new stress field characterization means is provided for a high-pressure experiment.

The invention belongs to the technical field of mining engineering safety, particularly relates to an experimental research method for coal rock impact dynamic disasters of a filling prevention and control working face, and aims to solve the problem that the sudden fracture process of overlying strata is difficult to reproduce in the traditional coal mine impact dynamic disaster research. A PCL material is heated, an asbestosed wire gauze is drawn out, a drop hammer falls in an iron pipe, a two-dimensional similar simulation experiment platform for instantaneous fracture of the overlying hard roof of the coal seam is constructed, gravitational potential energy is converted into impact kinetic energy through impact of falling of the drop hammer, and coal rock stress mutation is induced. The method comprises the following steps: simulating the instantaneous caving condition of a top plate in an overlying strata structural instability state, and capturing the whole process of dynamic interaction of a filling body-coal rock system under a coal rock impact dynamic disaster by combining a sensor and a monitoring system; meanwhile, a filling material is introduced to support the goaf, coal rock bearing pressure experimental data before and after goaf filling are compared, and the protection effect of the filling material on the coal rock under the condition of instantaneous collapse of the overlying roof is studied.

The present application relates to rock mechanics, seepage mechanics and unconventional natural gas development technical field, specifically relates to a multi-scale pore and fracture connectivity characterization method of coal body under variable confining pressure based on nuclear magnetic resonance, comprising the following steps: confining pressure saturation and benchmark acquisition; constant pressure displacement and in-situ monitoring: keeping confining pressure constant, injecting nitrogen displacement under constant pressure difference, testing T2 spectrum in-situ at preset time node, obtaining residual water integral area, and determining displacement equilibrium until spectrum shape is stable; multi-stage confining pressure experiment; multi-scale connectivity calculation; compaction-damage stage determination, the present application divides nuclear magnetic resonance T2 spectrum into three scale intervals of micro-pore, medium-pore, large-pore and fracture, calculates the connectivity of each scale through relative connectivity, can distinguish the differential influence of confining pressure on pores and fractures of different scales, reveals the asynchronous evolution law of micro-pore network and fracture system, and provides fine data support for deep coal and rock seepage mechanism research.

The invention provides a test device and method for efficiently stripping asphalt from old asphalt stone materials. The device comprises a high-pressure test bin, a cartridge bag, an anti-explosion sheet, a collecting bin, a mass block, an exploder, a liquid CO2 gas storage tank, a filling machine, a high-pressure gas pump, a piston and the like. The method mainly comprises the following steps: putting old asphalt and stone materials into a high-pressure experiment bin through a feeding hole, and sealing an upper sealing head; an anti-explosion piece with a cartridge bag is installed at the position of the lower end socket, the lower end socket is sealed, and the anti-explosion piece is pressed; the filling machine and the air storage tank are started, liquid CO2 is injected into the high-pressure experiment bin through the high-pressure air pump and the air injection hole, after permeation is saturated, the exploder is started, the cartridge bag and the anti-explosion piece are excited to be broken, old asphalt stone materials are sprayed out of the high-pressure experiment bin, and asphalt is stripped from the surfaces of stone. The method is reasonable in conception, is obtained through rapid unloading after high-pressure liquid CO2 saturated permeation, has the outstanding advantages of being good in crushing effect, simple in technological process, low in cost and the like, and can achieve efficient stripping of asphalt from the stone surface.

The invention relates to an impact tendency coal body fracturing grouting modification experiment method and device, and belongs to the technical field of deep mine rock burst prevention and control. The method comprises the following five steps: carrying out basic mechanical property measurement on a coal body sample; triaxial loading drilling pressure relief fracturing or cyclic fracturing is adopted, and acoustic emission monitoring is synchronously carried out; preparing a plurality of groups of grouting slurries with different proportions; pressurizing and grouting, and analyzing the distribution form through CT scanning; and drying and curing, and re-measuring the impact tendency index. The device comprises a grouting system, an air compressor, a liquid storage tank, a grouting pipeline, a pressure gauge and other components, a triaxial pressure experiment system, an acoustic emission monitoring system, a CT scanning device and the like. A complete experiment system is constructed, coal body fracturing grouting modification whole-process analysis is achieved, and experiment support is provided for rock burst prevention and control.

The invention provides a high-speed mechanical unloading device and method. The device comprises a bulk solid supporting block, a bulk solid supporting block tray, a bulk solid supporting block cover plate, a mass block, an oil cylinder, a hydraulic center, a high-pressure experiment bin, an oil cylinder piston and the like. The mass block is used for sealing ore and high-pressure water in the high-pressure experiment bin; the bulk supporting block penetrates through the wall of the high-pressure experiment bin and is supported at the middle lower part of the mass block, and the lower part of the bulk supporting block is supported in the bulk supporting block tray; the bulk supporting block cover plate and the bulk supporting block tray are installed; the oil cylinder is connected with the bulk supporting block tray; during unloading, hydraulic oil in the oil cylinder flows back to the hydraulic center, the piston of the oil cylinder descends to drive the bulk solid supporting block tray to move downwards, the bulk solid supporting block rotates outwards to be opened, and after the mass block loses support, the bulk solid supporting block is pushed by high-pressure water in the high-pressure experiment bin to be rapidly and downwards sprayed out, and unloading is completed. According to the invention, no consumables and explosion impact are realized, the integrity and coherence are good, and compared with the existing rapid unloading device, the rapid unloading device has stronger technical advantages and reliability.

The present application belongs to the technical field of oil production matching technology, and discloses a high-coagulation heavy oil reservoir cold damage evaluation method, which utilizes physical simulation and numerical simulation methods to analyze the reservoir cold damage degree, reversibility, the minimum temperature for avoiding cold damage and the reservoir temperature recovery time from quantitative and qualitative aspects, wherein the physical simulation firstly determines the crude oil properties through the crude oil viscosity-temperature and wax precipitation experiments, then utilizes the core to carry out breakthrough pressure experiments to determine the occurrence temperature of the reservoir cold damage, startup pressure experiments to determine the minimum temperature for avoiding damage, relative permeability experiments to determine the influence degree of the cold damage on the reservoir percolation capacity, mercury injection experiments to analyze the influence of the cold damage on the reservoir pore structure, and two-dimensional nuclear magnetic experiments and laser confocal experiments to determine whether the cold damage is reversible and the reversible temperature; the numerical simulation is utilized to analyze the recovery time required for different liquid amounts and different temperature working liquids to enter the formation, so as to finally achieve the purposes of reducing the development cost of the high-coagulation oil reservoir and improving the development effect.

The present invention discloses a method and device for determining thermodynamic parameters of the PVT phase characteristics of a reservoir fluid, wherein the method comprises: determining the critical temperature and critical pressure of the reservoir fluid plus component based on the specific gravity and normal pressure boiling point of the reservoir fluid plus component; determining the eccentricity factor of the reservoir fluid plus component based on the vapor pressure of the reservoir fluid plus component; determining the binary interaction coefficient between the reservoir fluid plus component and the hydrocarbon component based on the result parameters of the reservoir fluid saturation pressure experiment; determining the volume offset term of the reservoir fluid plus component based on the result parameters of the reservoir fluid density measurement; and determining the viscosity parameters of the reservoir fluid based on the result parameters of the reservoir fluid viscosity measurement. The present invention obtains experimental data through a simple experimental process, fits the experimental data step by step, and gradually determines the thermodynamic parameters of the PVT phase characteristics of the reservoir fluid. This method can more quickly obtain the thermodynamic parameters of the PVT phase characteristics of the reservoir fluid and ensure the accuracy of the obtained parameters.

The utility model discloses a variable frequency multistation high accuracy high and low temperature pressure test device belongs to pressure test field, including pressure test box, the front end of pressure test box is equipped with several observation windows, the inside of pressure test box is equipped with several circulating air flue, the inside equidistance of pressure test box is installed with several tool fixtures, the inside equidistance of pressure test box is installed with several circulating pipes, the surface of several circulating pipes all is equipped with the lead hole, the upper end of pressure test box is installed with two control panels, the front end of pressure test box is installed with several door locks, the utility model discloses the pressure test box not only can play high accuracy high and low temperature test operation to multiple test samples simultaneously, thereby significantly enhance the practicality and test efficiency of pressure experimental device, and still be convenient for playing the heat dissipation and protection effect to pressure experimental device through above -mentioned structure cooperation, and then can prolong the service life of pressure experimental device.

The invention relates to the technical field of compression resistance experiment devices, and discloses a high-density permanent magnet motor anti-extrusion experiment device which comprises an experiment table and a motor shell body, the upper surface of the experiment table is provided with an extrusion mechanism for carrying out a compression resistance experiment on a motor shell, and the experiment table is internally provided with a lifting mechanism which moves up and down during detection. An inner detection mechanism for detecting the interior of the motor shell during a compression resistance experiment is arranged in the motor shell body, a first rotating gear and a connecting plate are driven by an arranged hydraulic cylinder to move downwards, and meanwhile, the connecting plate drives an extrusion mechanism to move downwards through an arranged connecting rod; therefore, when the extrusion mechanism is moved to detect different positions of the motor shell body, the lifting mechanism is moved in the same direction to detect the interior of the motor shell body.

The utility model discloses a pressure testing machine with a protection structure, and relates to the technical field of pressure testing machines, the pressure testing machine comprises a plate body, a pressure mechanism is fixedly installed at the top end of the plate body, a protection mechanism is arranged on one side of the pressure mechanism, the protection mechanism is installed at the top end of the plate body, and the protection mechanism comprises a fixing frame. According to the pressure testing machine, the protection mechanism is arranged, the front face of the pressure testing machine can be protected through the protection mechanism, so that workers are prevented from being hurt when a pressure experiment is carried out, and the using effect of the pressure testing machine is improved; the pressure test can be performed on the test object through the pressure mechanism, and the test object can be prevented from splashing from other directions through the shell, so that other personnel are prevented from being hurt during the test.

The utility model relates to a pressure test device with a detachable expansion joint. The pressure test device comprises a corrugated pipe expansion joint, a sealing mechanism and a water injection and detection mechanism, sealing mechanisms are arranged at the upper end and the lower end of the corrugated pipe expansion joint, a water injection and detection mechanism is arranged on the sealing mechanism located at the upper end of the corrugated pipe expansion joint, and the corrugated pipe expansion joint is detachably connected with the sealing mechanisms. The device meets the test pressure requirement, the structural member of the device has no obvious deformation during the pressure test, the device is sealed without leakage, and the expansion joint safely completes the pressure test inspection; the sealing structure adopts a structure of an upper sealing end cover and a lower sealing end cover and adopts a dual-sealing mechanism of a rectangular sealing ring and a Y-shaped sealing ring; the expansion joint generates pressure thrust when the pressure machine bears a pressure experiment; the operation is simple and convenient, and the device is detachable, welding-free and reusable; and compared with a conventional pressure test mode, the time cost and the personnel cost during the pressure test are reduced.

The utility model provides an air pressure experiment device, which comprises a device body, a buffer tube, a PLC control panel and a 24V direct current voltage module are arranged in the device body, two ends of the buffer tube are respectively provided with a to-be-experimented equipment interface tube and a compressed air interface tube, and the to-be-experimented equipment interface tube and the compressed air interface tube are integrally formed with the buffer tube. The pipe diameter of the to-be-tested equipment interface pipe and the pipe diameter of the compressed air interface pipe are smaller than the pipe diameter of the buffer pipe, the compressed air interface pipe is provided with a pressurization electromagnetic valve, the buffer pipe is connected with a pressure sensor and a pressure relief pipe, and the pressure relief pipe is connected with a pressure relief electromagnetic valve; a control display screen is installed on the surface of the device body, and the control display screen, the pressurization electromagnetic valve, the pressure relief electromagnetic valve and the pressure sensor are electrically connected with the PLC control panel. And the 24V direct-current voltage module is electrically connected with the PLC control panel. The device can be used for carrying out air pressure and air tightness experiments on air pressure experiment equipment, and has the advantages of simplicity in operation and accurate experiment data.

The invention discloses a surrounding rock grouting effect evaluation system and method based on radon gas monitoring, and relates to the field of surrounding rock grouting effect evaluation. The system comprises a radon gas monitoring system and a laboratory device, the radon gas monitoring system comprises a monitoring grouting anchor rod and a radon measuring assembly. A plurality of monitoring grouting anchor rods are arranged, each monitoring grouting anchor rod comprises a hollow rod body and three air exhaust rods embedded in the hollow rod body in parallel, grouting holes are formed in the pipe wall of the hollow rod body, the tail end of the hollow rod body can be opened and closed, the air outlet ends of the three air exhaust rods are fixedly installed at the tail end of the hollow rod body, and the air inlet ends of the three air exhaust rods are correspondingly located in the ranges of an elastic area, a plastic area and a broken area of surrounding rock. The radon measuring assembly comprises a radon measuring instrument; the laboratory device is a triaxial pressure experiment device. On-site actual measurement and experimental analysis are combined, multi-point radon gas precipitation concentration is synchronously monitored on site and compared with a critical characteristic threshold value, grouting effects at different depths in a rock stratum are inverted according to radon gas concentration distribution characteristics, operation is convenient and fast, system monitoring efficiency is high, and data reliability is high.

The application is suitable for the technical field of structural material mechanical property experiment, and provides a high-temperature internal pressure composite loading test device for a thin-walled shell structure, which comprises: an internal pressure loading assembly arranged on the inner side of a to-be-tested thin-walled shell structure and used for generating a normal loading force outward on the inner surface of the to-be-tested thin-walled shell structure; a high-temperature loading assembly arranged on the outer side of the to-be-tested thin-walled shell structure and used for heating the to-be-tested thin-walled shell structure; a support structure used for supporting; a sensor assembly comprising at least a first sensor used for collecting pressure experimental data of the internal pressure loading assembly and a second sensor used for collecting temperature experimental data of the high-temperature loading assembly; an analysis module used for processing each experimental data to obtain the material performance of the to-be-tested thin-walled shell structure; and a control module used for controlling the work of the test device, so that the high pressure and the high temperature are simultaneously loaded without interference, and the problems of complex and tedious experimental operation and high experimental cost are solved.

The utility model relates to the technical field of foundation detection, and discloses a foundation detection device which comprises a foundation base layer, two side buttresses are symmetrically arranged on the two sides of the top end of the foundation base layer, top limiting grooves are formed in the top ends of the side buttresses, two limiting blocks are symmetrically arranged in the top limiting grooves in a sliding mode, and the limiting blocks are arranged in the top limiting grooves in a sliding mode. A side buttress is arranged at the top of the foundation base layer, a ballasting platform and a balancing weight are arranged above the side buttress, a foundation compression detection assembly used for detection is arranged at the top end of the foundation base layer, and two groups of compression displacement detection assemblies are symmetrically arranged on the periphery of the top end of the foundation base layer. The foundation pressure detection assembly and the pressure displacement detection assembly are arranged at the bottom of the ballasting platform, the friction condition of the surface of the foundation base layer is preliminarily judged, and then accurate detection experiment data can be obtained through a real pressure experiment, so that convenience is provided for research and detection of a user.

The utility model relates to the field of air pressure experiments, and discloses an internal filtering device for a pressure test tool, which comprises parallel filtering kettles, the parallel filtering kettles are formed by fixedly connecting a first filtering kettle and a second filtering kettle in a left-right parallel manner, the first filtering kettle and the second filtering kettle are in bilateral symmetry, and the tops of the joints of the first filtering kettle and the second filtering kettle are communicated. A cover plate is fixedly connected to the top of the parallel filtering kettle, the bottom of the cover plate is tightly attached to the upper portions of two partition plates, the two partition plates are symmetrically distributed and located in the first filtering kettle and the second filtering kettle respectively, the partition plates are fixedly connected with the front inner wall and the rear inner wall of the first filtering kettle and the front inner wall and the rear inner wall of the second filtering kettle, and the bottom of each partition plate extends to the lower position of the middle of the parallel filtering kettle. The top of the cover plate is fixedly connected with an inlet pipe and an outlet pipe, and the inlet pipe penetrates through the cover plate and extends into the first filtering kettle.

The invention discloses a gas-liquid-solid three-phase porous jet erosion corrosion experimental device and experimental method, and belongs to the technical field of erosion corrosion experimental testing. The experimental device comprises a jet system, a sand adding system and a gas injection system, the jet system comprises a jet chamber, and a bearing device for mounting a sample to be tested is arranged in the jet chamber; a jet main pipeline is arranged on the jet chamber, the tail end of the jet main pipeline is connected with a nozzle, and the outlet center of the nozzle is over against the surface center of the to-be-tested sample; the sand adding system comprises a sand bearing measuring cylinder, and a bottom outlet of the sand bearing measuring cylinder is communicated with the top of the jet flow main pipeline; the air injection system comprises an air compressor, and the air compressor is connected with a liquid input pipeline through an air injection pipeline; the to-be-tested sample is connected with a copper conductor to serve as a working electrode, and a counter electrode and a reference electrode are further arranged in the jet chamber. The device can be used for gas-liquid-solid three-phase jet flow experiments and under-pressure / non-under-pressure experiment tests, and has wider and practical functions.

The utility model provides an improved device for a spring static pressure experiment, and relates to the technical field of spring detection devices. A connecting rod is installed on the supporting frame, two lead screws are installed on a top plate of the supporting frame, and a supporting rod is fixedly welded between an upper plate and a lower plate of the supporting frame. The top end of the connecting rod is fixedly connected with a middle upper plate; the supporting rod is sleeved with a top plate, a middle upper plate and a lower bottom plate. The upper side and the lower side of the middle upper plate are each provided with two beating assemblies. After a to-be-tested spring is clamped on the pressure plate, the other end of the spring abuts against the pressure plate on the flapping swing plate in the same group, after the connecting rod drives the middle-upper plate to reciprocate, a reciprocating flapping fatigue test is carried out on the springs in the four groups of flapping assemblies up and down, and when only the two groups of flapping assemblies below are provided with the springs, the springs are flapped. The hydraulic rod drives the connecting rod to move downwards to drive the middle upper plate to move downwards, a static pressure experiment can be conducted on the spring, and the problem that the static pressure experiment and the flapping fatigue experiment can not be conducted easily through improvement is solved.

The utility model discloses a cable pressure experiment device which comprises a base and a vertical frame located on the base, a vertical guide rod is arranged on the vertical frame, the upper end of the guide rod is fixedly connected with the vertical frame, and a hammer head is arranged at the lower end of the guide rod in a sliding mode. The guide rod is sleeved with a ballasting weight; a clamping mechanism for fixing a cable is arranged on the base; the vertical frame is provided with an electromagnetic chuck above the guide rod, and an iron block is arranged on the ballasting weight; and a sleeve is arranged between the ballasting weight and the iron block. The guide rod is used for replacing a cylinder, the ballasting weight slides off from the guide rod and presses the hammer head for an experiment, the contact area of the ballasting weight is reduced, the friction force is reduced, the influence on the experiment effect is reduced, and meanwhile, the surface of the guide rod is plated with chromium, so that the friction force is further reduced. The length of the guide rod is long, and the lower end of the guide rod cannot be fixed, so that if the ballasting weight is disturbed, the lower end of the ballasting weight is easy to deviate, and the use of the electromagnetic chuck avoids the condition that the ballasting weight deviates due to the fact that the ballasting weight is fixed by a mechanical structure and is stressed when loosened.

The utility model discloses a fuel gas corrugated pipe pressure detection device which comprises a bottom plate, one side of the inner wall of the bottom plate is connected with a drawing plate in an inserted mode, the other side wall of a gas supply box is fixedly communicated with three gas outlet pipes, the outer wall of each gas outlet pipe is connected with a conical pipe in a screwed mode, the side end of the drawing plate is fixedly communicated with a vertical plate, and the vertical plate is fixedly communicated with a gas supply box. Three conical plugs are fixedly assembled on the side wall, close to the gas supply box, of the vertical plate, each conical plug corresponds to one conical pipe, different conical pipes can be replaced through the threaded connection effect of the gas outlet pipe and the conical pipes, maintenance is convenient, meanwhile, the outer walls of the conical pipes can be suitable for gas corrugated pipes of different specifications and diameters, and the gas corrugated pipes are convenient to use. The conical plugs are matched with the conical plugs on the side walls of the vertical plates, the conical plugs are also suitable for gas corrugated pipes of different specifications and diameters, it can be guaranteed that multiple sets of experiments are conducted at the same time, the experiment effect is guaranteed, meanwhile, the pressure experiment efficiency is guaranteed, use is convenient, and practicability is high.

The utility model provides a venturi valve negative pressure experiment device, and belongs to the technical field of experiment devices. Comprising a containing frame, a groove is formed in the containing frame, a limiting part is arranged in the groove, an elastic arc plate is arranged in the groove, an arc-shaped clamping plate is arranged at one end of the elastic arc plate, a connecting limiting plate is arranged at one end of the arc-shaped clamping plate, and a plurality of limiting blocking pieces are arranged at one end of the connecting limiting plate; a second weakening groove is formed in the inner wall of the limiting blocking piece. According to the utility model, through the arrangement of the limiting part, the position of the valve to be detected in the placing frame can be limited, and the problems that the position of the valve to be detected in the placing frame is deviated due to shaking during hoisting, the valve to be detected cannot be aligned with a flange of a pipeline, the position of the valve to be detected needs to be adjusted again, and the operation is inconvenient are solved. A to-be-tested valve cannot be quickly installed in an experimental device, and the installation efficiency is affected.

The invention discloses a method and a device for identifying an effective cover layer of deep coal rock gas. The method comprises the following steps: selecting drilling cores of different lithology types of deep coal rock gas cover layers from a research area; respectively carrying out a coal seam roof diffusion coefficient experiment and a coal seam roof breakthrough pressure experiment by utilizing the drilling core so as to measure diffusion coefficients of different lithologic cap stratums and breakthrough pressures of the different lithologic cap stratums; determining the effective thickness of the cover layer of the research area according to the diffusion coefficient experiment result and the breakthrough pressure experiment result; and according to the effective thickness and the well logging interpretation result of all wells in the research area, predicting the distribution of the deep coal rock gas effective cap strata.

The ultrahigh-temperature-resistant and high-pressure-resistant rock core holder comprises a high-pressure cavity, and stepped grooves are formed in the inner walls of the two ends of the high-pressure cavity correspondingly; the core sample is sleeved with a rubber sleeve, and the two ends of the rubber sleeve are sealed through core sealing plugs respectively; the sealing system comprises a left end cover sealing plug, a right end cover sealing plug and two groups of nested sealing rings; the press-fitting mechanism is detachably connected with the stepped grooves in the two ends of the high-pressure cavity; the end cover sealing plug at the right end is connected with the rock core sealing plug at the right side through a telescopic pipe; a confining pressure pressurizing opening is formed in the left end cover sealing plug, and an axial pressure pressurizing opening is formed in the right end cover sealing plug. The telescopic rod can ensure that hydraulic oil permeates into the rock core and pollutes the rock core in the ultra-high-temperature and high-pressure experiment process due to slippage of the rock core plug, and the experiment stability is greatly improved.

The utility model discloses a micro differential pressure sensing system and an air tightness detection device, and relates to the technical field of air tightness detection. The micro differential pressure sensing system comprises an air pressure acquisition pipeline module, a differential pressure sensing module and a working environment maintenance module. When an enclosure system air pressure experiment starts, the air pressure collection pipeline module is used for controlling the first communication control pipeline to be opened to obtain the air pressure of the liquefied natural gas film type storage tank to the first air pressure tank; when an enclosure system air pressure experiment is finished, an air pressure collection pipeline module is used for controlling a second communication control pipeline to be opened to obtain air pressure of a liquefied natural gas film type storage tank to a second air pressure tank, so that an air pressure difference value in the first air pressure tank and the second air pressure tank is obtained through a pressure difference sensing module; and in a constant-temperature environment of the working environment maintenance module, micro-differential pressure leakage monitoring is performed on the internal air pressure of the LNG containment system in a marine environment, so that the accuracy of air pressure difference value detection is ensured.

The invention provides a high-speed piston buffering device and method. The buffering device comprises a piston, a high-pressure experiment bin, a mass block and a rapid unloading mechanism. A piston is hermetically embedded in the upper end of the high-pressure experiment cabin, and a mass block is embedded in the lower end; an air injection hole and a water injection hole are formed in the upper end of the high-pressure experiment bin; the mass block is supported and fixed through a quick unloading mechanism; the lower end of the high-pressure experiment cabin is internally provided with a piston buffer cushion above the mass block; the high-pressure experiment bin is divided into an upper section and a lower section which are connected through a flange plate; the piston cushion is fixed between the upper plate and the lower plate of the flange plate; the piston cushion is sealed with the upper plate and the lower plate of the flange plate through sealing rings; drain holes are further evenly distributed in the side wall of the piston cushion pad. The device is reasonable in conception, the piston blade foot falls into the piston blade foot cavity, water is rapidly squeezed, impact force is transmitted, water enters the high-pressure experiment bin through the drainage hole, piston buffering is completed, and the device has the outstanding advantages of being good in buffering effect, reliable in sealing and the like.

The present invention relates to a coal seam transformation experimental device for CO2-N2 combined displacement based on fracturing, comprising an experimental chamber, wherein the upstream side of the experimental chamber is connected to a gas supply unit, a fracturing fluid unit and a water supply unit, and CO2, N2 and fracturing fluid are respectively injected into a plurality of coal samples in the experimental chamber, and the water supply unit transports water into the experimental chamber to maintain the pressure in the chamber; the downstream side of the experimental chamber is connected to a gas analysis unit, a permeability detection unit and a drain pipe; the experimental chamber is made of a transparent material, and a CT probe is provided on the top for real-time photography of internal cracks in the coal sample; a main rotating shaft is provided in the experimental chamber, and a plurality of support rods are connected to the main rotating shaft, and a coal sample is provided at the free end of each support rod, the outer side of the coal sample is wrapped in a jacket, and the upstream end is connected to the gas supply unit and the fracturing fluid unit through a pipeline, and the downstream end is connected to the gas analysis unit and the permeability detection unit through a pipeline; the coal sample rotates with the main rotating shaft, moves to the bottom of the CT probe in turn, and is tested.

The utility model relates to the technical field of underwater pressure experiments, in particular to an underwater pressure experiment device, which comprises a telescopic cylinder, the telescopic cylinder consists of a cylinder shell, a rear cover and a telescopic rod, and the cylinder shell and the rear cover are mounted and sealed through a mounting and dismounting structure; the sealing structure is mounted in the air cylinder shell; compared with the prior art, by arranging the mounting and dismounting structure, the sealing effect of the whole telescopic air cylinder in the static process can be improved while mounting and dismounting between the air cylinder shell and the rear cover are facilitated, and by arranging the sealing structure, the sealing effect of the telescopic air cylinder in the dynamic telescopic process can be effectively improved.

The invention discloses a visual downhole throttler system and method based on a neural adversarial network (GAN). The visual downhole throttler system and method are suitable for real-time monitoring and long-term health recording of anomalies such as internal cavitation and bubble aggregation of a throttler under the high-pressure multiphase flow working condition of a gas well. The system is composed of a high-pressure experiment loop, a visual throttler, a high-speed camera system, an automatic regulating valve, a working condition control system, a GAN processing unit and a display terminal. The method comprises the following steps: collecting flowing images under different working conditions through high-speed camera shooting to construct a data set; the CFD simulation image is used for superposing the noise enhancement data, and a generator and a discriminator are constructed and trained; enhancing an original image by using a generator, outputting an abnormal probability graph by a discriminator, and further extracting defect features; and integrating detection results based on the timestamps, and establishing a health evolution database. The method provided by the invention has higher robustness under the environment of strong reflection, low contrast and complex noise, and can realize disassembly-free, online and long-period health monitoring of the throttler.

The utility model discloses an anti-leakage chemical reagent batching tank which comprises a sealing tank, a floating ball liquid level controller of which a detection part is arranged in the sealing tank, an air inlet / outlet valve and a material inlet / outlet pipe which are used for communicating the sealing tank with the outside, and a material inlet / outlet valve communicated with the material inlet / outlet pipe, the floating ball liquid level controller is used for controlling the amount of liquid to be added or discharged, the air inlet and outlet valve is used for being connected with an air source or a vacuum pump to achieve positive pressure and negative pressure of the sealing tank, and the feeding and discharging pipe is used for extracting liquid in the negative pressure state of the sealing tank and discharging liquid in the positive pressure state of the sealing tank. Non-contact feeding and discharging of positive and negative pressure experiments are achieved in the whole process, the feeding and discharging amount is accurately controlled through the liquid level of the floating ball, the filter pipe is matched with the filter material, volatile substances in the tank do not leak out, external active gas does not pollute reagents in the tank, and the safety of chemical reagent batching is guaranteed.