89results about "Specific gravity by measuring pressure differences" patented technology

The invention discloses an SF6 gas density measurement and error compensation system based on dynamic segmented calibration, and relates to the technical field of gas pressure and density measurement, the SF6 gas density measurement and error compensation system comprises a gas pressure sampling module used for amplifying weak analog signals output by a pressure sensor and completing analog-to-digital conversion to obtain digital sampling data used for pressure calculation; the gas density calculation module is used for establishing a density solving model based on a preset physical state equation and outputting a gas density calculation value; and the gas density calibration module is used for carrying out segmented calibration on a pressure interval corresponding to a density calculation value by taking a preset reference pressure point as a reference and outputting a calibrated density measurement result. The invention provides a method for carrying out high-precision sampling and amplification on a weak signal, and solving the density based on rapid iteration of a Betti-Bridgman equation; the invention relates to an SF6 gas density high-precision measuring system which is linked with three systems and is dynamically segmented and asymmetrically calibrated by taking 0.5 MPa as a benchmark.

The invention relates to the technical field of chemical equipment, in particular to a special online density precision detector for a full-automatic chlorination process. The device comprises an instrument desk assembly installed on a reaction kettle, a compressed air inlet pipe used for air inlet is connected to the side of the instrument desk assembly, an air inlet main valve and a pressure reducing valve are arranged on the compressed air inlet pipe, a rotor flow meter is arranged in the instrument desk assembly, the bottom end of the instrument desk assembly is connected with an H air blowing pipe and an L air blowing pipe, and the two air blowing pipes are both connected into the reaction kettle. The bottom end of the L-shaped air blowing pipe is higher than the bottom end of the H-shaped air blowing pipe, a pressure difference transmitter is arranged on the top of the instrument desk assembly, and the L-shaped air blowing pipe and the H-shaped air blowing pipe are sleeved with sampling pipes. Through the arrangement of the sampling pipe, it is ensured that the measurement environment is stable, and the measurement precision is ensured; the direct contact between an instrument and reaction liquid is directly avoided, indirect measurement is carried out by adopting pressure difference, the service life of equipment is greatly prolonged, and the device is suitable for production of various highly corrosive materials.

The present application relates to a kind of SF6 gas density monitoring method and system, including multiple SF6 density relay, edge gateway and cloud platform.SF6 density relay is installed in the gas inlet of GIS equipment each gas chamber, its built-in antenna, main control circuit board, temperature pressure integrated sensor, power supply and base plate etc., real-time acquisition SF6 gas temperature and pressure data, calculate density value and standard temperature compensation pressure value by state equation, through LoRa wireless communication transmission to edge computing gateway;Edge computing gateway identifies the relay number of the temperature value exceeding the site index, determines that it is disturbed by heating device, triggers dynamic correction algorithm to send corrected temperature indication value to SF6 density relay, and upload cloud platform synchronously updates data.The system is combined by hardware distributed layout and edge gateway correction, solves the temperature indication error problem under heating environment, eliminates the risk of SF6 relay misjudgment, realizes remote monitoring and alarm.

Embodiments herein relate to systems and methods for varnish detection and / or monitoring in hydrocarbon fluids. In various embodiments, a system for monitoring varnish compounds in fluids is included herein including a control circuit in communication with a fluid property sensor. The system can measure one or more fluid properties (such as dielectric constant, density, resistivity, viscosity and the like) with the fluid property sensor, monitor the same over a time period, and identify an occurrence of a rate of change in the measured property indicating a presence of the varnish compounds. In various embodiments, a system herein can be configured to measure a fluid property of a fluid with a fluid property sensor, monitor the fluid property value over a time period, and predict a time of the onset of varnish compound formation based on the trend of the fluid property value over time. Other embodiments are also included herein.

The utility model provides a kind of SF6 gas relay density monitoring device, it is related to SF6 gas density monitoring technical field.The device includes shell, gas flow channel and control unit.Gas flow channel is through shell, and its inner wall is equipped with the mounting pedestal that is protruded to center.Fixed with sensor module on mounting pedestal, the module includes temperature sensor and pressure sensor, and module surface is covered with high heat-conducting silicone grease layer, to improve heat conduction efficiency.The air current direction of sensor module is equipped with spoiler, it is inclined arc sheet, can optimize air current state.Control unit is electrically connected with sensor module, for receiving and processing the signal from temperature sensor and pressure sensor, the device solves the technical problem that SF6 gas relay density monitoring device is insufficient in real-time and accuracy due to temperature compensation, and the real-time of temperature compensation and measurement accuracy are significantly improved.

The utility model discloses an evaporator solution density measuring device and system. The evaporator solution density measuring device comprises a circulation branch, a gas-liquid separation tank, a density measuring tank and a densitometer, wherein an inlet and an outlet of the circulation branch are respectively communicated with an evaporator; the gas-liquid separation tank and the density measurement tank are sequentially arranged on the circulation branch in the flowing direction of the solution; and the densimeter is communicated with the density measuring tank. A circulation branch is arranged outside the evaporator through the gas-liquid separation tank and the density measurement tank, the solution is in a flowing state when flowing through the gas-liquid separation tank and the density measurement tank, the state of the solution is basically consistent with that of the solution in the evaporator, and the phenomena of solution deposition and pipeline blockage are avoided. At the moment, the density of the solution in the density measurement tank is measured through the densimeter, the density value of the solution in the evaporator can be truly reflected, and the measurement accuracy is improved.

A method for measuring slurry concentration in a tailings thickening device includes the following steps: obtaining the pressure values ​​at each monitoring point, which are equidistantly located at different heights within the tailings thickening device; calculating the slurry density at each monitoring point; calculating the slurry concentration at each monitoring point; constructing a distribution model of the slurry concentration within the tailings thickening device using nonlinear regression based on the slurry concentration and distance from the liquid surface at each monitoring point; and substituting the distance from the liquid surface at the point to be measured into the distribution model to obtain the slurry concentration at the point to be measured. Compared with existing technologies, this invention offers a simple and rapid measurement method that avoids direct contact with the slurry, preventing interference from the slurry to the monitoring instrument and ensuring the reliability of the monitoring data. It is highly operable, requiring only a pressure sensor to complete the monitoring without adding other auxiliary equipment, thus reducing the complexity of the monitoring system. It is also highly timely and can measure the slurry concentration at any height, providing a basis for subsequent fine-tuning of the slurry concentration.

The invention can be used for checking the density of nuclear fuel pellets in an automatic density calculation mode and transmitting the measuring results to a database. The claimed device comprises, arranged in succession, an article loading unit, an article volume measuring unit, an article mass measuring unit, and an article unloading unit. The article loading unit comprises an entry collector and a gate that opens to admit an article into the volume measuring unit. The article volume measuring unit comprises a differential pressure transducer having two cavities, one of which is connected to a measuring chamber into which the article to be checked is loaded, and the other of which is connected to a reference chamber permanently containing a reference article. Each chamber is provided with a valve for opening and closing an entrance to the corresponding cavity of the differential pressure transducer. The article mass measuring unit comprises a weighing device with a platform for receiving articles. The article unloading device comprises a device for expelling an article, and an exit collector into which the weighed articles are released.

A system for mixing a liquid with a powder into a solution batch includes a hopper (20) into which said powder is deposited, the hopper (20) having a powder outlet (22) therein. A mix tank (60) is also provided having a liquid supply inlet (62), a recirculation inlet (64), and a solution outlet (66). A mix pump (40) that is in fluid communication with the solution outlet (66), the powder outlet (22), and the recirculation inlet (64) operates to mix and transfer the solution.

The embodiment of the invention discloses an oil-water mixed fluid measuring instrument and an oil-water mixed fluid measuring method. The oil-water mixed fluid measuring instrument comprises an oil conveying pipeline, a static pressure bypass, a measuring bypass and a pressure measuring assembly. According to the oil-water mixed fluid measuring instrument provided by the embodiment of the invention, oil-water mixed circulation conveyed by the oil conveying pipeline can be sampled at any time, exploitation or production is not influenced in the sampling process, the oil-water ratio of the oil-water mixed circulation can be directly determined through the arrangement of the static pressure bypass and the pressure measuring assembly, and the detection efficiency is high.

The modification method for the gas density relay, the gas density relay with the online self-check function and the check method thereof provided by this application are used for high-voltage and medium-voltage electrical equipment, including a gas density relay body, a gas density detection sensor, a temperature regulating mechanism, an online check contact signal sampling unit and an intelligent control unit. Regulate temperature rise and fall of the temperature compensation element of the gas density relay body through the temperature regulating mechanism, which leads to a contact action of the gas density relay body, the contact action is transferred to the intelligent control unit through the online check contact signal sampling unit, and the intelligent control unit detects the operating value and / or return value of the contact signal of the gas density relay body based on the density value at the time of contact action. The gas density relay check can be completed without maintainer at the site, so as to realize free maintenance, greatly improve the reliability of power grid, increase work efficiency and reduce the cost.

This invention provides a remote-reading sulfur hexafluoride density meter, belonging to the field of electrical instrumentation technology. Its structure includes: a gear rotatably connected to the dial, with the gear teeth engaging with each other; a first fixing post fixedly connected to the dial, with a fixing hole on the first fixing post; a helical bimetallic strip, fitted around the gear's rotating shaft, with its inner end connected to the shaft. This invention adds a helical bimetallic strip to the gear mechanism and fixes its outer end. Based on this structure, when the bimetallic strip responds to temperature changes, the rotational movement of its inner end can compensate for under-reading caused by excessively high ambient temperatures and offset over-reading caused by excessively low ambient temperatures, thereby improving detection accuracy within a certain range. Furthermore, this invention adds a protective plate to the rear of the instrument for the response element, improving assembly reliability and providing protection.

The application provides a method for detecting the depth of a conduit in concrete, which comprises the following steps: obtaining the medium density of the space between a first pressure sensor and a second pressure sensor on the conduit, and determining the first space position type of the space between the first pressure sensor and the second pressure sensor on the conduit; obtaining the first medium type corresponding to the position of a first vibration sensor and the second medium type corresponding to the position of a second vibration sensor, and determining the second space position type of the space between the first vibration sensor and the second vibration sensor on the conduit; if the first space position type and the second space position type are consistent, determining the first depth information based on the medium density, determining the second depth information based on the vibration signal, and determining the target depth information according to the first depth information and the second depth information. Through the method, the detection reliability can be improved by avoiding the single signal misjudgment, and the depth detection precision is improved by comprehensively calculating the target depth.

The application provides an electrical system with online sampling and check function and its check method for high-voltage and medium-voltage electrical equipment, including electrical equipment, gas density relay, gas density sensor, valve, pressure regulating mechanism, online check contact signal sampling unit and intelligent control unit. The pressure is increased or decreased by the pressure regulating mechanism to enable the contact action of the gas density relay of electrical equipment. The contact action is transmitted to the intelligent control unit through the online check contact signal sampling unit. The intelligent control unit detects the alarm and / or blocking contact signal operating value and / or return value according to the density value of the contact action; the check of the gas density relay can be completed without maintenance personnel on site, which greatly improves the reliability of the power grid and the work efficiency, and reduces the O&M cost. At the same time, it also realizes the mutual self-inspection between gas density relay and gas density sensor, and further realizes the maintenance-free.

The utility model discloses an on-site detection device for the slurry density of an ammonia desulfurization tower, which relates to the technical field of slurry density detection and comprises a slurry storage device with a closed working cavity, and the closed working cavity is in opening and closing connection with an inlet of a circulating pump through a first valve. The closed working cavity is in opening and closing connection with the outlet of the circulating pump through the second valve, and when the first valve and the second valve are both in an opening state, the closed working cavity temporarily stores slurry through the pressure difference between the outlet and the inlet of the circulating pump. Through the arrangement of the slurry storage device, the slurry can be conveyed into the slurry storage device for temporary storage by utilizing the pressure difference between the inlet and the outlet of the circulating pump when the first valve and the second valve are opened, so that convenient sampling is realized.

The present application relates to the technical field of density sensor, particularly relates to an overflow type density sensor, which comprises a measuring tube, the upper end of the measuring tube is fixedly installed with an overflow weir for liquid overflow, the side of the measuring tube is provided with a fixed density detector near the lower position, and the outer side of the measuring tube is provided with a mounting cap wrapping the overflow weir near the upper position. The second locking screw column is screwed, so that the measuring tube and the rotating ball are rigidly locked, the posture is fixed, the leveling process ensures that the constant measuring liquid level surface physically locked by the overflow weir is in a horizontal state, and then the vertical height difference between the two pressure taking points of the density detector is kept at a design value. The design converts the complex field installation reference calibration problem into a simple mechanical leveling and locking operation, so that the instrument can obtain the measuring reference accuracy on various complex pipeline layouts, and effectively solves the systematic measurement error caused by the installation inclination of the traditional sensor.

The utility model discloses a wet desulphurization slurry density on-line measuring device which comprises a slurry pond, a high-position measuring mother pipe, a low-position measuring mother pipe, two manual shutoff valves, a high-position measuring inlet pipe, a low-position measuring inlet pipe, a communicating pipe, a differential pressure densimeter and an electric flushing valve. The high-position measuring mother pipe and the low-position measuring mother pipe which are communicated with the slurry pond are arranged on one side of the slurry pond. One ends of the high and low measuring inlet pipes are communicated with the corresponding measuring mother pipes through manual shut-off valves, the other ends of the high and low measuring inlet pipes are respectively connected with two pressure sensing diaphragm heads of the differential pressure densimeter, and the high and low measuring inlet pipes are communicated through a communicating pipe; compared with the prior art, the densimeter probe has the advantages that the measuring continuity can be ensured, the measuring precision of the densimeter probe is improved, and the densimeter probe is convenient to mount and overhaul.

The invention relates to the technical field of measurement, particularly provides a true density detection device, and aims to solve the problems of high cost and multiple air leakage points of a true density instrument for realizing positive and negative air intake. In order to achieve the purpose, the true density detection device comprises a gas circuit module, the gas circuit module comprises a surge bin, a sample bin and an expansion bin, the surge bin is communicated with a gas inlet and a gas outlet of the gas circuit module at the same time, and the volume of the surge bin is smaller than the volume of the sample bin and the volume of the expansion bin; the sample bin and the expansion bin are both communicated with the buffer bin, and the sample bin and the expansion bin can be communicated only through the buffer bin. By means of the arrangement, under the condition of forward air inlet or reverse air inlet, inlet air can firstly enter and fill the buffer bin and then enter the sample bin, due to the fact that the size of the buffer bin is very small, the pressure difference between the two bins can be rapidly balanced, powder samples can be effectively prevented from being blown up, a proportional valve does not need to be arranged, cost reduction is facilitated, and production efficiency is improved. Pipeline arrangement is simplified, and gas leakage points are reduced.

The utility model discloses a PH and density detection system for a wet desulphurization process. The PH and density detection system comprises a plurality of sampling branch pipes, a sampling header pipe and a detection tank, the number of the sampling branch pipes corresponds to the number of circulating pumps on the desulfurizing tower, one end of each sampling branch pipe is connected with an outlet of the circulating pump, the other end of each sampling branch pipe is connected with a sampling header pipe, the sampling header pipe is connected with a slurry inlet in the bottom of a detection tank, and the detection tank is provided with a PH meter interface, a differential pressure densimeter interface and an overflow port. The overflow port is connected with the desulfurization tower through a pipeline; according to the utility model, slurry in all directions in the tower can be comprehensively collected in real time in a manner of sampling at the outlet of the circulating pump, so that the accuracy of PH and density detection data is improved; through a positive pressure sampling mode, pipeline blockage caused by a static pressure self-flowing mode can be avoided; through the electric regulating valves at the head ends of the branch pipes, the flow of each branch sampling pipeline can be balanced, the flow speed of sampling slurry is controlled, the flow stability is ensured, and the abrasion of an instrument probe is reduced.

The application provides a modification of gas density relay, a gas density relay with online self-check function and its check method for high-voltage and medium-voltage electrical equipment. The gas density relay includes a gas density relay body, a gas density sensor, a pressure regulating mechanism, a valve, an online check contact signal sampling unit and an intelligent control unit. The pressure is increased or decreased by the pressure regulating mechanism to enable the contact action of the gas density relay body. The contact action is transmitted to the intelligent control unit through the online check contact signal sampling unit. The intelligent control unit detects the alarm and / or blocking contact signal operating value and / or return value of the gas density relay body according to the density value of the contact action; the check of the gas density relay can be completed without maintenance personnel on site. It has remote reading function to realize free maintenance and significantly improve the reliability of the power grid and the work efficiency, as well as reduces the O&M cost.

Devices, methods, and systems for monitoring an aerosol density level in a self-testing fire sensing device are described herein. One device includes an adjustable particle generator configured to generate aerosol, an optical scatter chamber configured to measure an aerosol density level of the aerosol, and a controller configured to compare the measured aerosol density level with a threshold aerosol density level and stop the adjustable particle generator from generating the aerosol responsive to the measured aerosol density level reaching and remaining at or above the threshold aerosol density level for a particular period of time.

A method of determining density of a fluid within a system includes actuating a piston of a hydraulic cylinder at a target velocity. Additionally, the method includes determining differential pressure and volumetric flow rate of the fluid flowing through an orifice under actuation of the piston. The density of the fluid is determined based on the first differential pressure and the volumetric flow rate of the fluid, which is used by the system to regulate a mass flow rate of fluid within the system.

The invention discloses a liquid density monitoring method and device, electronic equipment and a storage medium, and relates to the technical field of control, slurry differential pressure signals are collected by means of a preset differential pressure measurement assembly, the density is calculated, and meanwhile measurement, flushing and pollution discharge execution assemblies are connected into an automatic control system to form a closed-loop control process. Sediment accumulation caused by slurry solid content change in long-term operation can be reduced through flushing and pollution discharge, and differential pressure signal fluctuation is avoided; the density value can be dynamically corrected based on historical data and working condition parameters to improve the measurement accuracy, fault self-diagnosis and alarm prompting are achieved by setting fault judgment conditions, manual inspection and experience judgment are replaced, the response speed is increased, and the measurement accuracy is improved. The technical effects of reducing slurry sediments, stabilizing differential pressure signals, reducing the maintenance cost, improving the desulfurization efficiency, avoiding the non-planned shutdown of the system and enhancing the operation stability of the desulfurization absorption tower are achieved.

Methods and apparatus for measuring pressure density of a fluid are described herein. A system herein includes a fluid pathway; a pressure sensor coupled to the fluid pathway; a density sensor coupled to the fluid pathway; and a volume reduction device coupled to the fluid pathway. A method herein includes circulating a fluid through a fluid pathway; closing a first valve in the fluid pathway; closing a second valve in the fluid pathway; using a volume reduction device located in the fluid pathway between the first valve and the second valve to increase pressure of the fluid; measuring pressure of the fluid in the fluid pathway between the volume reduction device and one of the first valve and the second valve; and measuring a density of the fluid in the fluid pathway between the volume reduction device and one of the first valve and the second valve.

The application provides a GIS online micro-water density monitoring system, and belongs to the technical field of micro-water density detection.The system comprises a processing cylinder, a monitoring host, GIS equipment and a transmitter main body; the GIS equipment is communicated with the inner cavity of the processing cylinder through a gas inlet pipe and a gas outlet pipe; the system further comprises a uniform flow dehumidification assembly arranged in the processing cylinder, a cleaning assembly arranged on the top of the uniform flow dehumidification assembly and a vibration assembly arranged on the uniform flow dehumidification assembly; the gas flow is compressed, accelerated and cooled through a gas collecting cover; the gas flow is further cooled and uniformly mixed by a spiral blade, so that the detection precision is improved; water droplets are removed by gravity and their sliding paths are constrained; a wiping mechanism is driven to rotate and lift by a fan blade power, so that online cleaning of the sensor and self-cleaning of the wiping block are realized; meanwhile, the axial movement of a sliding rod is driven by a cam groove and a roller, so that the spiral blade is excited to vibrate at a high frequency to remove condensed water droplets; and the accuracy and long-term stability of micro-water density monitoring are improved, and the operation and maintenance cost is reduced.

The present application relates to a kind of verification method and device of mixed gas density relay with humidity detection function, belong to density relay verification technical field, solve the problem that humidity and gas mixing ratio cannot be detected simultaneously when carrying out density relay verification in existing.The method comprises: in the verification chamber, fill mixed gas to pressure balance;The verification chamber is cooled by refrigeration, the actual pressure in the verification chamber, actual temperature, the light energy value of light after the action of the verification chamber, and the measured pressure read by the pressure sensor of density relay;During the cooling process, the pressure sensor of density relay is verified by comparing actual pressure and measured pressure;The humidity detection and mixing ratio detection of mixed gas in the verification chamber are carried out in turn by monitoring the multiple change rates of light energy value.Various tasks are integrated, and the comprehensive operation and maintenance efficiency is improved.

Differential density system and method. A differential pressure transmitter measures a pressure difference between first and second pressure sensing locations. A reference vessel in fluid communication with the first pressure sensing location contains a reference fluid and a sample vessel in fluid communication with the second pressure sensing location contains a sample fluid. The reference fluid is in a first column above the first pressure sensing location and the sample fluid is in a second column above the second pressure sensing location. The second column is of substantially equal height as the first column. A value of total dissolved solids (TDS) in the sample fluid is determined based on the pressure difference.

An automated batch sampling drilling mud management system (1) includes a a portable mud measurement system (10) and a communications system (120). The portable mud measurement system (10) has one or more measurement devices (14) arranged to measure at least one property and / or characteristic of drilling mud; and a pumping system (16) arranged to pump a batch sample of drilling mud from a supply of drilling mud to the one or more measurement devices. The pumping system (16) is also able to subsequently flush the batch sample of drilling mud from the one or more measurement devices (14). The communications system (120) enables bidirectional communications between the mud management system (10) and a remote location to enable transfer of data therebetween and the exertion of control from the remote location to the mud management system (10).

The present disclosure is related to a level and / or density sensor for vessels suitable for storing liquids, in particular barrels or vats, more in particular barrels or vats for storing or producing wine. The hydrostatic pressure differential sensor for measuring volume and / or density disclosed herein comprises a main body; a tube for diving into the liquid; a hydrostatic pressure differential sensor; an air injector for injecting air into said tube; wherein the tube is coupled to the main body; wherein the hydrostatic pressure differential sensor has two inlets, a first inlet airtight connected to the upper top of said tube, configured so that the tube maintains air present in the interior thereof when dived into the liquid, and a second inlet for communicating with the interior of the vessel.