134results 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 present application relates to the technical field of microbial fermentation, and particularly relates to a universal fermentation device, a yogurt production system and a method for producing a yogurt with reduced uric acid. The universal fermentation device comprises a fermentation tank, a sampling tube, a test tube, a sliding member, a pressure detection module and a processor. The pressure detection module is installed on the test tube. The sliding member is slidingly fitted on the test tube, and the sliding member is connected with a first driving rod. The sliding member is provided with a clearance opening, and the clearance opening is matched with a plugging block. The plugging block is connected with a test rod and a second driving rod. One end of the sampling tube is communicated with the fermentation tank, and the other end is communicated with the test tube. The processor is used for determining the density of the fermentation sample and the viscosity of the fermentation sample. The universal fermentation device can realize continuous monitoring of the fermentation system during the fermentation process, effectively avoids sample confusion, improves the timeliness of analysis, ensures that the conditions reflected by the sample are highly consistent with the original fermentation system, and is suitable for various fermentation scenes.

The present invention relates to the technical field of marine hydrological monitoring, and in particular to an underwater profile density measurement system and method. The system comprises a survey vessel, a vessel anchor, a steel wire rope, rope guide devices, a parameter measurement device, a measurement and control transmission cable, and a data analysis system. The method comprises: connecting a vessel anchor to a steel wire rope, and then dropping the vessel anchor to a water bottom for anchoring and fixing; enabling a parameter measurement device to enter water along with a measurement and control transmission cable and to maintain movable connection with the steel wire rope; successively pulling the measurement and control transmission cable according to equally spaced markers to move upwards along the steel wire rope from an anchor point, and collecting two water pressure values at different depths and an attitude angle value measured by the parameter measurement device underwater; storing the collected data in a data analysis system, and on the basis of a built-in algorithm, obtaining the density of water around the parameter measurement device; and when the parameter measurement device moves upwards from the anchor point and leaves the water, performing integral processing on the measured data at all points to obtain the total water depth at the anchor point so as to obtain profile density values from the measurement device at different depths underwater, and drawing and generating a curve.

The invention relates to an SF6 gas density monitoring method and system. The system comprises a plurality of SF6 density relays, an edge gateway and a cloud platform. The SF6 density relays are installed at inflation ports of gas chambers of GIS equipment, each SF6 density relay is internally provided with an antenna, a main control circuit board, a temperature and pressure integrated sensor, a power source, a base and the like, SF6 gas temperature and pressure data are collected in real time, density values and standard temperature compensation pressure values are calculated through a state equation, and the density values and the standard temperature compensation pressure values are transmitted to the edge calculation gateway through LoRa wireless communication. And the edge computing gateway identifies the serial number of the relay of which the temperature value exceeds the station index, judges that the relay is interfered by the heating device, triggers a dynamic correction algorithm to send a corrected temperature indication value to the SF6 density relay, and uploads the corrected temperature indication value to the cloud platform to synchronously update data. According to the system, through combination of hardware distributed layout and edge gateway correction, the problem of temperature indication errors in a heating environment is solved, the risk of misjudgment of an SF6 relay is eliminated, and remote monitoring and alarm are realized.

A fluid flows through a flowmeter system including a first conduit, a U-bend, and a second conduit. Various differential pressures of the fluid flowing through the flowmeter system are measured. The differential pressures of the fluid are measured by various pressure sensors (for example, differential pressure sensors) installed on the flowmeter system. Rheology of the fluid is characterized by performing calculations using the measured differential pressures of the fluid and relative positions of the pressure sensors throughout the flowmeter system.

The utility model relates to the technical field of petroleum drilling and production, in particular to drilling fluid on-line monitoring equipment which comprises a surge tank, a manual three-way ball valve, an anti-explosion pneumatic ball valve, an anti-explosion pressure transmitter, an overflow chamber, a drain pipe and an anti-explosion temperature transmitter. Fluid is pumped by a pump and guided into a surge tank, temperature measurement is carried out through an anti-explosion temperature transmitter, real-time temperature data are output, high-temperature alarm is carried out through linkage with an anti-explosion pneumatic ball valve, flow adjustment is carried out on the fluid through a manual three-way ball valve, and the fluid continuously flows upwards to an overflow port through the anti-explosion pneumatic ball valve and then overflows into an overflow chamber. And during measurement, the explosion-proof pneumatic ball valve is closed, the fluid in a measurement area is static, the output pressure is measured through the explosion-proof pressure transmitter, the density of the output fluid is calculated by adopting a formula, and the equipment can detect the fluid in real time and give a high-temperature alarm, is rapid in detection and high in efficiency, and is suitable for large-scale popularization and application. The device is suitable for various complex working conditions and fluids.

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 invention relates to a real-time dynamic monitoring device for the specific gravity of cement slurry. The real-time dynamic monitoring device comprises a cement slurry storage tank, a slurry specific gravity collecting device, an integrated controller, a data wireless transmitting device, a database and application server, slurry specific gravity monitoring machine-mounted end equipment and slurry specific gravity monitoring remote monitoring end equipment, the slurry specific gravity collecting device is installed at a proper position of a cement slurry stirring tank or a cement slurry storage tank, and the slurry specific gravity collecting device, the integrated controller, the data wireless transmitting device, the database and application server and the slurry specific gravity monitoring remote monitoring end equipment are sequentially connected. And the integrated controller is also connected to the slurry specific gravity monitoring machine upper-end equipment. According to the invention, real-time measurement of the specific gravity of the slurry can be realized, measurement information can be remotely sent to a database for subsequent quality evaluation application, pile forming is ensured to meet design requirements, real-time alarm is carried out on substandard conditions, and a statistical chart is formed to serve as a basis for quality management of related departments.

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.

The embodiment of the utility model discloses a density relay checking device. The density relay checking device comprises a cylinder, a piston, a transition cavity and a breather pipe, the piston is arranged in the air cylinder and is in sliding connection with the air cylinder, and a closed space defined by the piston and the air cylinder is a variable-pressure cavity; the piston is used for sliding in the air cylinder, so that the volume of the variable-pressure cavity is increased to reduce the gas pressure in the variable-pressure cavity, or the volume of the variable-pressure cavity is reduced to increase the gas pressure in the variable-pressure cavity; one end of the breather pipe is connected with a variable-pressure cavity of the air cylinder, and the other end of the breather pipe is connected with a density relay of equipment to introduce gas in the equipment into the variable-pressure cavity; the transition cavity is arranged in the air cylinder and communicates with the variable-pressure cavity through the air inlet and outlet channel, the air inlet and outlet channel is provided with a switch, and the transition cavity is used for collecting air in the variable-pressure cavity so as to supplement the pressure reduction amount to the variable-pressure cavity and meet the requirement that when the size of air in a pipeline is increased due to the fact that a long breather pipe is used and installed, the pressure reduction amount is increased. The step-down amount reaches a target verification value.

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 invention relates to a gas densitometer (100, 200) for monitoring the pressure or density of a gas in a gas chamber (1), comprising: a housing (102, 202) having a first housing cavity (103, 203) and a measurement chamber (168, 268); a first coupling (104, 204) via which the measurement chamber can be connected to the gas chamber; at least one reference flap (105, 205), which is in particular directly or indirectly connected to the transmission element (109, 209); and at least one switching and / or monitoring unit (110, 210), which is held or can be operatively connected to the transmission element directly or indirectly. The measuring chamber is connected to the gas chamber in a gas-permeable manner via a first coupling, and the reference bellows forms a reference chamber (111, 211) which is filled with a constant amount of reference gas. A surface section covering the reference chamber is provided or can be implemented as a measuring surface for gas from the measuring chamber at least in some regions inside the first housing chamber or the measuring chamber.

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 present application relates to the technical field of gas density measuring devices, and provides a self-compensating bellows. By arranging a plurality of compensating elastic parts that fit together with a plurality of corrugated elastic parts of a corrugated outer tube, and the thermal expansion coefficients of the compensating elastic parts and the corrugated elastic parts are inconsistent, when the temperature of the gas in the self-compensating bellows changes, each compensating elastic part undergoes a deformation amount different from that of each corrugated elastic part, so as to overcome the influence of temperature on the deformation of each corrugated elastic part, thereby enabling the self-compensating bellows to achieve temperature self-compensation. The present application provides a self-compensating gas density measuring device, which uses the self-compensating bellows as a measuring mechanism, so that the device does not need to install additional temperature compensation elements such as a compensating gas chamber or a bimetallic strip, thereby simplifying the structure, reducing costs, and solving the technical problems of the complex structure and high cost of the temperature compensation method of the existing gas density measuring equipment.

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 invention provides a method for estimating the density of superheated steam and a method for measuring the volume flow rate of superheated steam. The method for estimating the density of superheated steam makes it possible to easily grasp the density of superheated steam at a predetermined temperature and a predetermined pressure as an object. In a virtual density calculation step (S11), a virtual density (rho ntp) is calculated from a state equation of an ideal gas on the basis of conditions of a temperature (Tntp) and a pressure (Pntp) in a standard state and a molecular weight (M) of water. The virtual density [rho] ntp is a virtual density of superheated steam in a standard state in which the superheated steam is assumed to be present in the standard state while being regarded as a desired gas. In the density estimation step (S12), the density ([rho] est) of the superheated steam in a state of a predetermined temperature (Tpd) and a predetermined pressure (Ppd) is calculated on the basis of the Boyle-Ear law using the virtual density ([rho] ntp) calculated in the virtual density calculation step (S11), thereby estimating the density ([rho] est) of the superheated steam in a state of the predetermined temperature (Tpd) and the predetermined pressure (Ppd).

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.