1048 results about "Differential pressure" patented technology

The invention discloses a pressure-controlled drainage gas production method and system for a coal-bed gas well. The pressure-controlled drainage gas production method comprises the steps that drainage is conducted through the first daily drainage amount, wherein the first daily drainage amount meets the eliminating demand for production interference objects in a coal bed; and a pressure-supplementing medium is injected while drainage is conducted, and the downhole flow pressure daily drop amount is maintained as a first differential pressure value so as to avoid retracting and closing of pores and cracks in the coal bed. According to the pressure-controlled drainage gas production method for the coal-bed gas well, the drainage speed at the drainage state can be conveniently determined, the eliminating demands for drilling and completion fluids, pulverized coal and slack coal in the coal bed can be met, and meanwhile, retracting and closing of the pores and the cracks in the coal bed can also be avoided; and compared with the prior art, the pressure-controlled drainage gas production method is simple in process, the production efficiency of the coal-bed gas well can be greatly improved, and quite high practical value and popularization value are achieved.

The invention discloses an intelligent gas micro-differential pressure monitoring system based on multi-sensor fusion, and relates to the technical field of gas micro-differential pressure monitoring, a sensor network arranged at a pipeline collects and verifies process state data, a component fluctuation index is established to quantify the fluctuation degree of gas components, and if the component fluctuation index is abnormal, the component fluctuation index is determined to be abnormal. Calling a dynamic physical property compensation function to output a correction coefficient and a differential pressure reference value; if the accumulative deviation between the actually measured differential pressure and the theoretical differential pressure reference value exceeds a set threshold value, locally adjusting and optimizing or globally re-calibrating and updating the model; outputting a real-time correction value and deviation measurement through a fusion algorithm, and when an error continuously exceeds the standard, dynamically adjusting a fusion weight or triggering model calibration; if the obtained value exceeds the preset threshold value, early warning or alarming is sent out and fed back to the previous step.

The invention discloses a flowmeter-oriented embedded multi-parameter fusion calibration control method and system, relates to the technical field of industrial measurement and embedded control, and is used for solving the problem of unstable calibration caused by misalignment of multi-link flow signals, compensation lag and fusion oscillation. The method relates to synchronous acquisition, pretreatment and calibration of differential pressure type, ultrasonic wave and thermal type mass measurement links and environment parameters such as temperature, pressure and density. All-channel unified time scales are established through ternary binding, filtering and denoising, zero snapshot and alignment rules, a stability scoring mechanism is constructed in combination with offset behavior recognition, event classification and feature aggregation, and dynamic switching of a compensation path and a fusion strategy is driven. In a double-path fusion structure, table look-up compensation, model estimation, multi-algorithm parallelism and fusion track recording are adopted, version traceability and calibration result closed-loop control are achieved, and the stability and rechecking performance of mass flow output under complex disturbance are effectively improved.

The invention belongs to the technical field of flowmeter verification, and discloses a two-phase flow analysis system and method based on a differential pressure flowmeter and an electromagnetic flowmeter. The method comprises the steps that a differential pressure flow meter and an electromagnetic flow meter are arranged on adjacent sections of a pipeline, the electromagnetic flow meter collects voltage signals and analyzes the voltage signals to obtain liquid phase volume flow, and liquid phase mass flow is obtained by combining temperature correction; the differential pressure flowmeter calculates the gas density by using an ideal gas law according to the temperature and the pressure; inputting multi-sensor time sequence data into the weight optimization model, and optimizing the volume gas content and the total mass flow rate; baseline parameters are calibrated during full-pipe single-phase flow to obtain zero drift, and real-time temperature and pressure dynamic correction are combined, so that the metering precision and the working condition adaptability are improved; the problem of verification deviation of a traditional flowmeter is solved, high precision and high reliability of complex gas-liquid two-phase flow metering are achieved, and efficient and reliable technical support is provided for two-phase flow precise metering and process control in the fields of chemical engineering, energy and the like.

The invention discloses a shell-and-tube heat exchanger abnormity diagnosis method based on multi-parameter monitoring. The method specifically comprises the following steps that 1, temperature values and pressure values of a shell-and-tube heat exchanger tube pass inlet, all-pass connecting positions and a tube pass outlet are collected; step 2, carrying out segmented pressure difference calculation based on the collected pressure values, verifying the total pressure difference, if a verification result exceeds an error range, carrying out pressure value collection and calculation again, and if the verification result is within the error range, carrying out step 3; 3, calculating the proportion of the differential pressure of each process in the total differential pressure, then carrying out dynamic threshold judgment, and carrying out flow fluctuation alarm or carrying out the step 4 according to a judgment result; and 4, performing temperature gradient calculation based on the acquired temperature value, and diagnosing the abnormal pressure difference position as blockage or leakage based on the temperature gradient. The problem that in the prior art, due to the fact that the detection parameter is single, the accuracy of the detection result is poor is solved.

The invention relates to a moisture two-phase flow measurement method, which comprises the following steps of: building a measurement system: sequentially arranging a differential pressure transmitter and an ultrasonic transducer along a flowing direction; building a pulse transceiving circuit; the ultrasonic signals of the differential pressure transmitter and the conditioned ultrasonic signals are collected respectively; aiming at the obtained conditioned ultrasonic signal, based on an ultrasonic pulse echo thickness measurement principle, obtaining the thickness of a liquid film at the bottom of the pipeline, and obtaining the wave velocity of a disturbance wave of the liquid film at the bottom; flow pressure drop is calculated according to the differential pressure average value and the distance between the two pressure taps; carrying out moisture experiments under different gas and liquid flows, measuring the three parameters corresponding to each working condition, and respectively establishing function relationships between the three parameters and the gas phase apparent velocity and between the three parameters and the liquid phase apparent velocity; and performing moisture two-phase flow measurement on line, and solving by adopting a Newton iteration method according to the established function relationship to obtain the gas phase apparent velocity and the liquid phase apparent velocity under the current working condition.

The invention relates to the technical field of liquid level meters, in particular to a liquid level measuring instrument for a low-temperature and high-pressure container, and aims to solve the problem that when the liquid level of the low-temperature and high-pressure container is measured, measured data are easy to be wrong due to the influence of the pressure and temperature of a medium. Comprising a pressure measuring container; the liquid level meter comprises a gas phase pipe, a liquid phase pipe and a differential pressure transmitter, and one end of the gas phase pipe and one end of the liquid phase pipe are both communicated with the pressure measuring container; a gas-liquid drainage assembly; the differential pressure transmitter is used for measuring the liquid level in the pressure measuring container through the pressure of gas or liquid in the gas phase pipe and the liquid phase pipe, and the gas-liquid drainage assembly is used for separating gas and liquid in the gas phase pipe or the liquid phase pipe. The gas in the low-temperature and high-pressure container enters the gas phase pipe, the liquid in the low-temperature and high-pressure container enters the liquid phase pipe, the gas-liquid drainage assembly can treat media at the gas phase pipe and the liquid phase pipe respectively, and the problem that the media directly enter the gas phase pipe or the liquid phase pipe, and measurement data are unstable due to factors such as pressure fluctuation is solved.

The invention relates to the technical field of engineering machinery, and particularly discloses an electrically-driven metering pump load-sensitive system, a control method and engineering machinery, the electrically-driven metering pump load-sensitive system comprises a control unit, a driving motor assembly, a metering pump, a pilot hydraulic control unit, a pilot handle assembly, a load-sensitive valve assembly, an actuator assembly, a sensor assembly and a pressure difference control module; the driving motor drives the metering pump to supply oil to the load-sensitive valve assembly so as to drive the actuator assembly to operate; the control unit receives the maximum outlet pressure and the maximum load pressure of the pump collected by the pressure sensor, receives a system target pressure difference signal of the pressure difference control module at the same time, and synchronously controls the rotating speed of the motor and the valve target pressure difference output by the proportional pressure reducing valve. The system aims to solve the problems that a traditional upstream compensation load sensitive system lacks a flow saturation resisting function, and a downstream compensation load sensitive system has extra reversing energy consumption and fixed system pressure difference setting.

The invention discloses a fixed-point calibration and precision compensation method of a differential pressure type flowmeter and related equipment, and relates to the field of fluid measurement, and the method comprises the following steps: connecting the differential pressure type flowmeter to be calibrated and a standard flowmeter in series in the same gas path, and respectively collecting front-end pressure, front-back pressure difference of a laminar flow element and gas temperature; and a volume flow calculation model is established based on the structure parameters of the laminar flow element. Under the condition that a standard flowmeter outputs constant flow, fixed-point calibration is conducted on the flowmeter at a plurality of discrete temperature nodes and a plurality of discrete pressure nodes, a temperature compensation factor and a pressure compensation factor are determined respectively, and a continuous temperature compensation function and a continuous pressure compensation function are constructed through B-spline curve fitting. And substituting the compensation function into a volume flow calculation model to form a compensation volume flow model, and correcting the output of the differential pressure type flowmeter. And the influence of temperature change and pressure change on the flow characteristics and geometric characteristics of the laminar flow element can be effectively eliminated.

A metering method based on gas volume fraction fitting for wet natural gas is provided. The method includes fitting relationships between a gas Froude number and Venturi differential pressure and Venturi pressure loss with known data to obtain a gas Froude number calculation formula; dividing the known data according to a size of the gas Froude number; fitting relationships between a gas volume fraction and the Venturi differential pressure and the Venturi pressure loss in sections to obtain a piecewise gas volume fraction calculation formula under different gas Froude numbers; and acquiring, on the basis of the gas Froude number calculation formula and the piecewise gas volume fraction calculation formula, some necessary real-time data to calculate a real-time flow rate of the wet gas. The method avoids the use of a ray flow meter. The advantages of the method include accurate metering, small errors and no radioactive pollution.

The invention provides a pressure difference bypass device for a water distributing and collecting device of a variable-flow liquid cooling system, and relates to the field of variable-flow liquid cooling systems, the pressure difference bypass device comprises a main water inlet collecting pipe, a water distributing device main body, a main input pipe and a connecting pipe, the main water inlet collecting pipe is communicated with the water segregator main body through the connecting pipe, and the main input pipe is connected with the main water inlet collecting pipe. On the basis of real-time data of the pressure difference detector and the backflow flow speed detector, the central control unit dynamically adjusts the opening degree of the intelligent flow speed adjusting valve through a PID algorithm, so that the flow of a main loop is accurately matched with the requirements of branches, and redundant energy consumption of a traditional constant flow system is eliminated. And a system health degree evaluation model is constructed, when the branch flow is lower than a preset safety threshold value, the stabilized pressure pump is triggered to be shut down for protection, and the cavitation risk is avoided.

The invention discloses a continuous force measurement wind tunnel test method based on a differential pressure type pressure scanning valve, and belongs to the technical field of wind tunnel tests. In order to solve the problem that a test result can be introduced by a reference pressure error measured by reference pressure measurement equipment, the method comprises the steps that a differential pressure type pressure scanning valve is installed in an aircraft model, and a reference pressure channel and a last measurement channel of the differential pressure type pressure scanning valve are connected with a wind tunnel plenum chamber static pressure air pipeline; measuring the pressure at the same position with a wind tunnel static pressure sensor; calculating the range of the differential pressure type pressure scanning valve; performing a wind tunnel test, and synchronously acquiring the pressure of each surface pressure measuring hole, the wind tunnel total pressure and the wind tunnel plenum chamber static pressure of the aircraft model in different states; whether the difference value between the wind tunnel plenum chamber static pressure collected by the last channel of the differential pressure type pressure scanning valve and the wind tunnel plenum chamber static pressure collected by the wind tunnel static pressure sensor meets the measurement precision or not is judged based on the range of the differential pressure type pressure scanning valve; and performing test data processing on the effective test data, and calculating the coefficient of the wind tunnel flow field pressure hole.

The present invention relates to the field of measurement and testing technology, and specifically, to a differential pressure sensor zero-point tracking self-calibration method, system, device and storage medium. The differential pressure sensor zero-point tracking self-calibration method comprises the following steps: Environmental data acquisition: obtaining current environmental parameters through a detection module. The present invention saves manpower and time costs and improves the user experience of the product by setting an automatic zeroing and self-calibration mechanism without the need for manual intervention by the user. It also effectively maintains the long-term stability and accuracy of the sensor by real-time monitoring of the drift caused by temperature and humidity and performing compensation. At the same time, by using a filtering algorithm for calculation, it can completely eliminate the noise and drift generated by the sensor during long-term use, protect and extend the service life of the chip. In addition, the status of the device can be fed back in real time through the display module, so that the user can clearly understand the current working status of the system, thereby improving the confidence and satisfaction in the use of the device.

The invention discloses a hydraulic speed regulation control system of a feed pump turbine valve, which comprises a regulating valve control unit, and the regulating valve control unit comprises a regulating valve hydraulic control block and a regulating valve hydraulic servo-motor. A servo valve, a filter, a hydraulic control one-way valve, a differential pressure type plug-in loading and unloading valve, an upper plug-in stop valve, a lower plug-in stop valve, a quick-closing electromagnetic valve, a first pressure oil channel, a first oil discharge channel and a safety oil channel are fixed in the adjusting valve hydraulic control block. The safety oil duct is connected with the first pressure oil duct and the differential pressure type plug-in loading and unloading valve. The quick-closing electromagnetic valve is connected in parallel between the safe oil duct and the oil discharge channel I; an oil inlet of the servo valve is communicated with the filter, a control oil port is connected with the differential pressure type plug-in loading valve through the hydraulic control one-way valve, and the differential pressure type plug-in loading valve is connected with the lower plug-in stop valve; and the regulating valve hydraulic servo-motor is respectively connected with the upper cartridge stop valve and the lower cartridge stop valve. According to the system, the servo valve and the filter element can be replaced on line, and the technical problem that the servo valve and the filter element cannot be replaced on line in an existing regulating valve speed regulating system is solved.

A fuel system includes a chamber for storing a fuel, an optical differential pressure sensor, and one or more processors in communication with the optical differential pressure sensor. The optical differential pressure sensor is fluidically connected to the chamber and is configured to, when the fuel is stored in the chamber, output a signal indicative of a pressure difference in the optical differential pressure sensor to the one or more processors.

The invention relates to the technical field of equipment compensation control, and discloses a medical suction device with an altitude compensation function and a control method thereof. The method comprises the following steps: reading ambient air pressure data of a first pressure sensor, reading molecular sieve tank differential pressure data of a second pressure sensor, collecting pressure data of an output end of a third pressure sensor, and determining a real-time altitude according to the ambient air pressure data; a breathing pressure fluctuation value is calculated based on the molecular sieve tank differential pressure data, when the breathing pressure fluctuation value is lower than a preset negative pressure threshold value, the current breathing frequency is recorded, and nitrogen removal time, pressure equalizing time and flushing time are determined to control an electromagnetic valve to work; and when the oxygen concentration is lower than a first concentration threshold value and the real-time altitude height is lower than a preset height, increasing the nitrogen removal time by a first preset proportion and increasing the target rotating speed by a second preset proportion, and when the oxygen concentration is lower than a second concentration threshold value, stopping the operation of the compressor and closing all the electromagnetic valves. According to the invention, the false alarm rate is effectively reduced, and the equipment safety is improved.

The invention relates to the field of aviation main pump detection, in particular to an aviation main pump verification test bed operation state monitoring method and system, and the method comprises the steps: obtaining the oscillation frequency, proportional gain, pressure change sequence and oscillation amplitude change sequence of an aviation main pump; a difference value between a preset target pressure value and a current pressure value is used as an adjusting pressure difference, an adjusting interval is equally divided and arranged according to the pressure adjusting direction, and the length of the pressure adjusting interval is corrected based on an oscillation amplitude change sequence; setting an initial proportional gain according to the length of the adjustment interval, taking the ratio of the number of pressure points in the adjustment interval to the response time of the adjustment interval as a pressure change rate, analyzing a positive or negative adjustment evaluation function according to the oscillation frequency and the pressure change rate, and constructing a proportional gain optimization model; and dynamic monitoring and adjustment of the proportional gain of pressure boosting and reducing of the aviation main pump are completed. According to the method, the accuracy of state monitoring is improved by optimizing adjustment interval division.

The invention relates to the technical field of sensor testing, in particular to monocrystalline silicon differential pressure sensor function verification testing equipment which comprises a communication switching mechanism, a low-pressure pipe and a high-pressure pipe, high-pressure input and low-pressure input can be accurately controlled by connecting the low-pressure pipe and the high-pressure pipe to different pressure sources respectively, the full-range testing requirement of a differential pressure sensor is met, and the testing efficiency is improved. Common pressure combinations such as high pressure and low pressure, low pressure and high pressure, double high pressure and double low pressure in an industrial field can be simulated through the communication switching mechanism, performance verification of the sensor in a real environment is ensured, and the problem that an existing testing device cannot simulate a real testing environment and a multi-working-condition testing scene is solved.

The invention relates to the technical field of sonar buoy detection, in particular to a multi-channel positive and negative pressure airtightness detection system which comprises an equipment cabinet, a high-pressure pump, a vacuum pump, a computer and a detected cabin. The equipment cabinet is provided with two ventilation air paths which are respectively connected with the high-pressure pump and the vacuum pump, the balance tank and the detected cabins are inflated or deflated by controlling valves in the air paths, and a differential pressure sensor is used for detecting the pressure difference value of the balance tank and the detected cabins to judge whether the balance tank and the detected cabins leak air or not. According to the invention, by outputting multiple detection channels, multiple detected cabins can be detected at the same time and independent detection results can be given, so that the detection efficiency is improved; the airtightness detection system is simple in composition structure, does not need additional high-pressure-resistant sealing tanks and tools, adopts the differential pressure type sensor to improve the test precision and accuracy, and is convenient to operate, safe and reliable.

The invention relates to the technical field of temperature and humidity detection instruments, in particular to an embedded intelligent Internet of Things differential pressure temperature and humidity integrated analysis and processing instrument which comprises a supporting rod and a temperature and humidity detector, a lead screw is rotationally connected to an inner cavity of the supporting rod, a sliding block is in threaded connection with the circumferential outer wall of the lead screw, and the temperature and humidity detector is arranged on the side wall of the sliding block. A first motor is fixedly mounted in the middle of the upper surface of the supporting rod, the output end of the first motor penetrates through the upper surface of the supporting rod and is fixedly connected with the end of the lead screw, four mounting rods are fixedly connected to the outer side wall of the supporting rod, two supporting plates are fixedly mounted on the circumferential outer walls of the four mounting rods, and a cleaning assembly is arranged between the two supporting plates. Through the arrangement of the cleaning assembly, a cleaning brush in a cleaning cylinder wipes the temperature and humidity detection probe, water stains and dust attached to the surface of the temperature and humidity detection probe are removed, and therefore the accuracy of the measurement result of the temperature and humidity detection probe is improved.

The invention discloses a stepped self-adaptive high-pressure dynamic seal rotary table device, relates to the technical field of underwater radar rotary tables, can adapt to mutual switching of underwater radar deepwater work and water surface presetting, and can realize no leakage of the underwater radar rotary table during deepwater work. The stepped self-adaptive high-pressure dynamic sealing rotary table device comprises a mechanical sealing ring 1, a mechanical sealing ring 2,..., a mechanical sealing ring n, an oil injection nozzle, viscous pressure oil, a direction transmission device, a liquid leakage detection and discharge device, a rotary joint and the like. The radar rotary table has the following advantages: 1) the sealing pressure difference can be improved, and the underwater working depth of the radar rotary table is obviously increased; the sealing pressure difference is in positive correlation with the number of the multiple layers of mechanical sealing rings, and the more the rings are, the higher the pressure difference is; 3) the differential pressure can be distributed to each layer of mechanical sealing ring in a stepped and self-adaptive manner; 4) an outer layer auxiliary dynamic seal is added, so that the sealing reliability of the whole machine is improved; and (5) liquid leakage information and liquid leakage discharge can be monitored.

The utility model relates to the technical field of meters, in particular to a split type flow monitoring instrument which comprises a shell, a top cover, a first split type connecting pipe, a second split type connecting pipe, a pressure sensor, a displayer, a differential pressure balance valve, a Pitot tube probe and a connecting assembly, and the connecting assembly is arranged between the second split type connecting pipe and the Pitot tube probe. The Pitot tube probe is inserted into a measured pipeline, at the moment, the Pitot tube probe transmits a signal to the displayer and displays the signal on the displayer, the differential pressure balance valve is opened, liquid flows to the first split connecting pipe through the second split connecting pipe, and the pressure sensor transmits a numerical value to the displayer in real time and displays the numerical value on the displayer. The top cover can facilitate follow-up checking or cleaning, and the Pitot tube probe and the differential pressure balance valve are installed in a sectional mode, so that the workload of workers is reduced, the detection quality is improved, and follow-up maintenance and replacement are facilitated.

The invention relates to the technical field of petroleum engineering, in particular to a device and method for testing migration of a proppant in a shale reservoir, and the device comprises a model system, an injection system, a vacuumizing system, a pressure field measurement system, a differential pressure measurement system, a back pressure system and a data acquisition and processing system. The model system comprises a model box, a test bin is arranged in the model box, and the test bin penetrates through the side wall of one side in the width extension direction of the model box; the pressing plate can completely cover the test bin and is detachably connected with the model box; the two fluid conveying assemblies are arranged at the two ends of the model box in the length extension direction respectively, the structures are in mirror symmetry, each fluid conveying assembly comprises a first connecting pipe, and the first connecting pipes are communicated with the testing bin. According to the device and the method, different-width fracture and netlike fracture forms of the shale reservoir can be simulated, and the migration rule of shale reservoir fracturing fluid carrying sand in the fractures can be analyzed.

The invention relates to the technical field of flow measurement, in particular to an integrated differential pressure type orifice plate flowmeter which comprises a differential pressure transmitter, a filtering structure, a driving structure, a mounting structure, a fixing structure, a dismounting structure, a three-valve set, a pressure guide pipe and a mounting pipe. The arrangement of the filtering structure is convenient for intercepting and filtering a medium in the fluid channel, impurities can be prevented from entering a subsequent detection assembly to influence the detection effect, interference on flow detection is prevented, the driving structure is convenient for driving the guide block to drive the filter screen to reciprocate, and the relative position of the filter screen and the impurities is continuously changed. A first screw rod in the mounting structure drives a connecting ring to drive a plurality of abutting blocks to abut against a pipeline flange plate at the same time, so that particle impurities are not prone to adhering to the surface of a filter screen, the blocking risk is reduced, it is ensured that fluid smoothly passes through the filter screen, and a hole plate can be rapidly replaced without disassembling a plurality of components through drawing and inserting type mounting in the mounting structure, and the replacement efficiency is improved. And the installation efficiency of the flowmeter installation pipe is improved.

The invention belongs to the technical field of carbon sequestration, and particularly relates to a device and a method for measuring the carbon sequestration rate and the reaction rate of a CO2-water-rock mineralization reaction. The measuring device comprises a carbon dioxide gas source, a gas buffer cylinder, a metering pump, an electric heating bin, a data acquisition card for data acquisition and a reading display for data processing and displaying, wherein the electric heating bin comprises a reaction tank, a reference tank and a differential pressure gauge; according to the measuring method based on the measuring device, the differential pressure gauge is used for measuring the pressure difference between the two reaction tanks and the reference tank, tiny pressure changes under high pressure can be accurately measured, CO2 real-time consumption data are obtained, the measuring accuracy is improved, and the measuring result is more reliable; the amount of needed mineral powder is small, the pressure in the reaction tank is high, the pressure difference before and after the reaction is very small, and a conventional pressure sensor can bring a large error when measuring the pressure change; the carbon sequestration rate and the CO2 reaction rate in the mineralization reaction process are monitored on line, and the carbon dioxide mineralization rate can be monitored in real time.

The testing tool comprises a high-pressure end positioning plate and a low-pressure end positioning plate, the high-pressure end positioning plate is provided with a convex plane, the low-pressure end positioning plate is provided with a concave plane, and the convex plane is matched with the side surface of the concave plane; the convex plane is hermetically connected with the sensor core upper base, and the concave plane is hermetically connected with the sensor core lower base; the high-pressure end and low-pressure end positioning plate internal oil paths are connected with the high-pressure end and low-pressure end pressure leading ends; the sensor core upper base and the sensor core lower base are provided with a high-pressure end and a low-pressure end of the differential pressure sensor core; at each stable temperature point, different static pressure values are applied to the differential pressure type piston pressure gauge, meanwhile, corresponding differential pressure values are applied to the differential pressure type piston pressure gauge, and a measured value of a differential pressure sensor core is taken to obtain a temperature-static pressure-differential pressure ternary test data matrix; the testing tool is simple in structure, can adapt to testing work under the high static pressure condition, and completes multi-parameter synchronous measurement of the multiple differential pressure sensors under the high static pressure.

The invention discloses a high-gas-liquid-ratio gas-liquid two-phase flow and liquid holdup measurement method and device based on three-dimensional differential pressure, and the method comprises the steps: applying a centrifugal force to a gas-liquid two-phase flow through a centrifuge, and generating a stable gas nucleus-liquid ring separation structure; measuring radial differential pressure, axial differential pressure, temperature and pressure values of the centrifuge in real time; establishing a liquid holdup calculation model based on the differential pressure ratio of the radial differential pressure and the axial differential pressure, and obtaining the liquid holdup according to the liquid holdup calculation model; calculating a friction coefficient and corrected gas phase density according to the temperature and pressure values; and based on the mapping relation between the axial differential pressure and the gas phase apparent velocity and the gas state equation, the gas-liquid two-phase flow is calculated according to the liquid holdup, the friction coefficient and the corrected gas phase density. According to the invention, a high-precision, separation-free and fast-response industrial-grade solution is realized, and a new-generation measuring tool is provided for the key fields of shale gas exploitation, submarine oil and gas pipeline transportation and the like.

The invention discloses a differential pressure sensor precision calibration method for high-temperature environment monitoring, and relates to the technical field of sensor calibration, and the method comprises the steps: carrying out the high-temperature factor extraction and simulation parameter design of the application scene information of a differential pressure sensor, and obtaining a high-temperature test parameter table of the sensor; a standard differential pressure source is arranged in the high-temperature environment controllable simulation chamber; acquiring a multi-high-temperature parameter differential pressure test data set of the standard differential pressure source; establishing a multi-high-temperature parameter differential pressure compensation model set; obtaining a high-temperature calibration coefficient differential pressure compensation model set; and performing calibration matching calibration on the application scene information of the differential pressure sensor to be calibrated to obtain a differential pressure sensor precision calibration result. The technical problem that the measurement precision and stability of the sensor are poor due to the fact that the measurement precision of the differential pressure sensor is difficult to effectively calibrate in the high-temperature environment in the existing differential pressure sensor precision calibration is solved, and the technical effects of improving the measurement precision of the differential pressure sensor and improving the measurement stability and reliability are achieved.

The invention discloses a throttling orifice plate online deslagging and cleaning device based on bypass switching, and relates to the technical field of throttling orifice plate online cleaning, the throttling orifice plate online deslagging and cleaning device specifically comprises a medium pipeline and a bypass pipeline, the two sides of the medium pipeline communicate with the bypass pipeline, and a throttling plate assembly is installed on the medium pipeline; according to the invention, intelligent differential pressure monitoring and automatic control are carried out on the circulation of the throttling orifice pipeline, the differential pressure monitoring unit is used for detecting the pressure change of the fluid on the upstream side of the throttling orifice in real time, and the decision displacement unit in the controller is used for automatically judging the blockage degree and driving the hydraulic mechanism to work to complete bypass switching; by means of the design, full-process automation from detection to cleaning is achieved, the requirement for manual intervention is lowered, the cleaning efficiency and accuracy are improved, meanwhile, manual operation errors are reduced, and production safety, energy conservation and consumption reduction are further guaranteed.

The invention relates to an inner cone type differential pressure flowmeter based on multi-parameter compensation. The flow meter aims to solve the technical problem that an existing flow meter is greatly influenced by fluid parameters. According to the technical scheme, the device comprises a constant flow unit, a testing module, a transmitter module and a data processing module, a temperature measuring element and an inner cone throttler are arranged on the upstream inner wall and the downstream inner wall of a measuring pipeline in the fluid direction, the transmitter module comprises a temperature transmitter, a pressure transmitter and a differential pressure transmitter, the temperature transmitter is electrically connected with the temperature measuring element, and the pressure transmitter is electrically connected with the differential pressure transmitter. The pressure transmitter is electrically connected with a pipeline, the differential pressure transmitter is electrically connected with the head end and the tail end of the inner cone throttler, the data processing module comprises an adder, a multiplier and a squarer, the temperature transmitter, the constant current unit and the pressure transmitter are connected with the adder, the adder and the differential pressure transmitter are connected with the multiplier, the multiplier is connected with the squarer, and the squarer is connected with the output unit. Errors caused by fluid physical property parameter changes can be eliminated to the maximum extent through measured values, and the measurement precision is greatly improved.