2430results about "Volume metering" patented technology

According to the high-frequency corrosion-resistant pipeline type electromagnetic flowmeter, a first installation area used for installing a high-frequency magnetic field generation assembly is formed between the inner wall of a conductive outer pipe and the outer wall of an insulating inner pipe, and the high-frequency magnetic field generation assembly is not attached to the conductive outer pipe and the insulating inner pipe; when the wear-resistant lining and the insulating inner pipe are damaged to cause seepage of a corrosive medium, the high-frequency magnetic field generation assembly can be prevented from being corroded by the seeping corrosive medium; an isolation shell is arranged in the second installation area, a groove is formed in the end, facing the measurement channel, of the isolation shell, a through hole is formed in the bottom wall of the groove, a ceramic membrane used for sealing the through hole is arranged in the groove, the surface, facing the measurement channel, of the ceramic membrane is flush with the inner wall of the corrosion-resistant lining, and inert conductive liquid is arranged in the isolation shell. The electrode assembly comprises two measuring electrodes which are correspondingly soaked in the isolation shell, and the ceramic membrane prevents a corrosive medium in the to-be-measured liquid from entering the isolation shell, so that the measuring electrodes are prevented from being corroded.

The invention discloses a bidirectional flow measurement ultrasonic flowmeter, and relates to the technical field of bidirectional flow measurement. The ultrasonic flowmeter comprises an amplifying circuit, a balance and unbalance conversion circuit, a signal frequency mixing circuit, a low-pass filtering amplifying circuit, an automatic gain tracking adjusting circuit and an ADC (Analog to Digital Converter). And after the signal reflected and diffracted by the liquid is amplified by the amplifying circuit, the balanced and unbalanced conversion circuit converts the amplified single-ended signal into a differential signal. After a differential signal and an input local oscillator signal are mixed by the signal mixing circuit, gain adjustment is carried out on the differential signal and the input local oscillator signal sequentially through the automatic gain tracking adjustment circuit, upper frequency is filtered out through the low-pass filtering amplification circuit, and finally signal acquisition is carried out through the ADC. According to the ultrasonic flowmeter, the effective signal collection effect is improved, and the ultrasonic flowmeter is smaller in size space, lower in cost and more excellent in performance.

To provide a communication device or a water meter capable of providing dynamic water pressure.SOLUTION: Provided is a communication device 100 including an acquisition unit 175 for acquiring a flow rate from a water meter 200 or a slave device 100B, a communication unit 160 for communicating with a center 300, and a control unit 110 for calculating dynamic water pressure from the flow rate and transmitting the dynamic water pressure to the center via the communication unit.SELECTED DRAWING: Figure 2

The invention is suitable for the field of natural gas metering, and provides a natural gas volume flow correction method and system based on machine learning. For the natural gas to be measured, the gas volume flow rate under the working condition is firstly determined, and then the gas volume flow rate is corrected according to the gas pressure, temperature and compression factor under the working condition and the gas pressure and temperature under the standard condition, so that the ideal volume flow rate of the natural gas is obtained; therefore, the accuracy of natural gas energy calculation is improved. And the compression factor is determined according to the calorific value, the sound velocity value, the temperature under the working condition and the gas pressure of the natural gas, and the component information of the natural gas does not need to be determined, so that the problem that a traditional compression factor calculation method is difficult to apply due to the fact that the natural gas components cannot be directly determined by a physical property correlation technology is solved.

The invention provides a passive water flow monitoring system, which is installed at a liquid outlet, utilizes water flow to push a power generation module to generate power, stores energy and stabilizes voltage through a source processing module, and supplies power to a main controller and a wireless transmitting module, thereby realizing flow state detection and wireless transmission without an external power supply and wiring. The detection end is composed of a power generation module, a power supply processing module, a main controller, a detection module and a wireless transmitting module. The receiving end comprises a wireless receiving module, a main control module and a user interface; by detecting a rotating speed signal driven by water flow and wirelessly transmitting the rotating speed signal, real-time monitoring on whether liquid flows or not can be realized. The system has the advantages of no need of power supply and wiring, simplicity and convenience in installation, high sensitivity, low energy consumption, real-time remote monitoring and the like, can effectively prevent no-load operation of equipment such as a water pump and the like, reduces the maintenance cost, and is suitable for popularization and application in the fields of industrial automation, water treatment, consumer electronics and the like.

The invention discloses a non-invasive ultrasonic gas concentration and flow synchronous measurement device, and relates to the field of gas measurement equipment. The clamp body clamps and wraps the gas pipeline, and the clamp body is provided with a mounting space; the transducer assembly comprises a pair of ultrasonic transducers, each ultrasonic transducer comprises a sound wave generating surface, and a non-zero included angle is formed between the sound wave generating surface and the extending direction of the gas pipeline; the flexible ultrasonic transmission assembly comprises an acoustic coupling piece and an acoustic wave absorbing piece, the acoustic coupling piece is used for constructing a sound wave conduction path from the ultrasonic transducer to the gas pipeline in the first direction, and the acoustic wave absorbing piece is used for attenuating structural waves propagating in the second direction along the outer wall of the gas pipeline. By adopting the scheme, high-efficiency and high-precision gas concentration and flow measurement is realized on the premise of non-intrusive gas measurement equipment.

A powder dispensing apparatus having an elongate wedge-shaped hopper including one or more fluidized plates is described. The powder dispensing apparatus can be positioned above a pair of calender rolls to distribute a powder, such as a dry electrode material onto the calender rolls. Such fluidized wedge shaped hopper advantageously allows for an accurate and / or controlled rate of powder distribution across or substantially across the length of a calender roll.

The electromagnetic flowmeter comprises a shell and a sphere, connecting pipes are fixedly connected to the two ends of the surface of the shell, first connecting flanges are fixedly connected to the ends, away from each other, of the two connecting pipes, a fixing cylinder is fixedly connected to the center of the top of the shell, and a second connecting flange is fixedly connected to the top end of the fixing cylinder; the sphere is rotationally connected to the center in the shell, a communicating groove is horizontally formed in the shell in a penetrating mode, a rotating mechanism for rotating the sphere is arranged in the shell, and indicating mechanisms are arranged on the two symmetrical sides of the surface of the shell. Through the arrangement of the ball body, the magnetic field coil can be conveniently placed during use, meanwhile, the magnetic field coil can be conveniently protected, and in the use process, the ball body can be rotated to facilitate connection and disconnection of fluid in the shell, so that the use effect of the device is improved, and meanwhile, a rotating disc can be driven to rotate; the flow direction of the fluid of the device can be facilitated through the indicating arrow arranged on the surface of the turntable, and the mounting convenience of the device is improved.

The utility model provides an electromagnetic flowmeter sensor which comprises a flow guide pipe assembly, a flow guide pipe, a flow guide pipe, a flow guide pipe, a flow guide pipe and a flow guide pipe assembly, wherein the flow guide pipe assembly is internally provided with a flow guide cavity; the shell is arranged outside the flow guide pipe assembly in a sleeving manner; the two coils are arranged on the inner wall of the shell; the electrode penetrates through the wall surface of the flow guide pipe assembly, and one end of the electrode extends into the flow guide cavity and is used for being in contact with a to-be-detected medium; the converter connecting assembly is arranged on the shell; the coil is connected with the converter connecting assembly through the first lead; the electrode is connected with the converter connecting assembly through the second lead; and the two ends of the shell are respectively connected with one flange. The coil is installed on the shell, the weight borne by the flow guide pipe can be reduced, the wall thickness of the flow guide pipe is reduced, cost is reduced, the first lead and the second lead are connected with the converter through the converter connecting assembly, and reliable connection of the leads can be achieved.

The utility model discloses an ultrasonic flowmeter module which comprises a module body and a cover plate, the module body is in a cuboid shape, the left end and the right end of the module body are respectively provided with two transducer installation areas, the middle of the module body is provided with a control module circuit board installation area, and the cover plate is arranged on the upper surface of the module body. Each transducer mounting area comprises a cylindrical barrel, a closed blind hole is formed in the bottom of the barrel, the upper part of the barrel is closed through a cover plate, a through hole I is formed in the position, corresponding to the transducer, of the cover plate, a plurality of screw holes I are formed in the periphery of the barrel, and the control module circuit board mounting area comprises a cuboid frame body; a cavity is arranged between the frame body and the cover plate, the cavity is communicated with the barrel bodies on the two sides respectively to form an inverted-concave-shaped communicated cavity, the two ends of the control module circuit board extend into the barrel bodies respectively, a second through hole is formed in the upper surface of the cover plate at the corresponding position of the frame body, and a cylindrical terminal groove is formed in an opening of the second through hole. The terminal grooves protrude out of the surface of the cover plate. According to the utility model, the energy converter is prevented from being directly contacted with gas or liquid in the pipe section through the design of the blind hole, and the waterproof performance of the module is improved.

The invention discloses a river water flow measuring device, and relates to the technical field of river water flow measurement, the river water flow measuring device comprises a measuring support frame, the measuring support frame is provided with a folding assembly and a pushing assembly, the folding assembly is provided with a moving assembly and a carrying plate, and the pushing assembly is used for pushing the carrying plate to move towards a riverbed. The measuring support frame is provided with a take-up assembly, the take-up assembly is provided with a measuring device used for measuring river water flow, the moving assembly can drive the take-up assembly to move transversely, and one-key switching from a transportation state to a measuring state is achieved by arranging a foldable folding assembly and an automatic unfolding mechanism. After the controller sends out an instruction, the pushing assembly drives the sliding frame to automatically rotate and unfold, the carrying plate synchronously stretches out and stably makes contact with a riverbed, the whole unfolding process can be completed without manual intervention, the deployment efficiency and operation convenience of the equipment are remarkably improved, and the rapid laying requirements under various topographic conditions are met.

The utility model relates to the technical field of flow detection, in particular to a turbine flowmeter. The turbine flowmeter comprises a main body, a rotating shaft, a turbine, a detection assembly and a driving assembly, an accommodating cavity for fluid to flow through is formed in the main body; the rotating shaft is located in the containing cavity and arranged in the fluid flowing direction. The rotating shaft is rotationally connected with the body. The turbine is located in the containing cavity and arranged on the rotating shaft. The detection assembly is located in the containing cavity and used for detecting the attack angle of the fluid to the blade so that the turbine flowmeter can determine the fluid flow according to the attack angle. When the turbine flowmeter is used for detection, the influence of a correction or compensation mechanism on the detection efficiency can be eliminated, the detection cost can be reduced, and the detection precision can be improved.

A sampling device 100, for use with an air pump 900 of an air-sampling system, comprises a base-section 16 with a body 48, a sample slide support component (45, Fig 3F), an air pump connector 66 and a

To improve responsiveness while reducing the effect of noise, a valve control method for controlling a valve of a fluid control device includes generating a target response function converted from the flow rate setting using a target response transfer function; generating a target voltage function by making a correction in nonlinearity of a drive voltage for the valve and a flow rate, with respect to the target response function; generating a feedforward voltage signal from the target voltage function by making a correction corresponding to the delay characteristic of the valve; causing a feedback controller to generate a feedback voltage signal from a deviation between the target response function and a flow rate measurement of a flow rate sensor; generating a corrected command voltage signal using a feedforward voltage signal and the feedback voltage signal; and controlling the valve using the corrected command voltage signal.

The invention discloses a self-adaptive vibration suppression vortex shedding flowmeter and a method. The self-adaptive vibration suppression vortex shedding flowmeter comprises a flowmeter shell, a pipe connecting flange, a vortex shedding generator and a piezoelectric sensor, the piezoelectric sensor is embedded into the damping device, the damping device restrains measurement vibration of the piezoelectric sensor, the free end of the piezoelectric sensor is connected with a detection probe, and the detection probe prevents a medium in a flow field from making contact with the root of the detection probe through a joint ring; an inner cavity is formed in the vortex street generating body, and a temperature sensor is integrated in the inner cavity to sense the temperature of fluid flowing through the vortex street generating body in real time; according to the invention, the temperature sensor is integrated in the vortex street generator, so that accurate sensing and real-time compensation of the temperature of a core flow field are realized; multi-stage vibration isolation is constructed through the damping device, the vibration isolation pad, the damping device protection shell and the top base at the same time, and vibration interference is reduced. Due to the optimal design of the detection probe, the durability is improved, and the adverse effect of vibration on signals can be reduced; and the applicability in a complex environment and the reliability of long-term operation are obviously enhanced.

The invention provides a drilling fluid outlet flow anti-disturbance monitoring method and device, a medium and a program product, and the method comprises the steps: obtaining a liquid level echo signal through a millimeter-wave radar liquid level meter installed above a drilling fluid outlet buffer tank, and inhibiting an environment interference factor through time domain and frequency domain fusion adaptive filtering of dynamically adjusting a weight according to a signal-to-noise ratio; inputting the filtering signal into a BP neural network to obtain phase information influenced by the liquid level disturbance interference factor, and combining a physical information neural network to obtain a radar wave attenuation coefficient corresponding to the phase information; on the basis of a liquid level fluctuation and radar echo attenuation quantitative model, liquid level height variation is obtained by integrating phase information and radar wave attenuation coefficient inversion calculation, the current liquid level height is obtained by combining the liquid level height with radar ranging liquid level height, and the relative flow change of the drilling fluid in the buffer tank is judged. High-precision flow monitoring is achieved under the conditions of liquid level disturbance and environment disturbance, and well control safety and the intelligent level of drilling operation are improved.

The invention discloses a sewage pipeline flow detection device, and relates to the field of flow detection. The sewage pipeline flow detection device comprises a pipe section type flow meter, the pipe section type flow meter is connected with a sewage pipeline through a flange, an outer clamping type flow meter is installed on the outer side of the sewage pipeline, the pipe section type flow meter comprises a pipe section shell and a control terminal, two sensor shells are arranged on the outer side of the pipe section shell, and the control terminal is connected with the two sensor shells. The interiors of the two sensor shells are each provided with an intrusive sensor, the ends of the intrusive sensors extend towards the interior of the pipe section shell, and the intrusive sensors are connected with an outer wall cleaning unit and an end face cleaning unit. According to the sewage pipeline flow detection device, when the control terminal detects that the detection difference value of the pipe section type flow meter and the outer clamping type flow meter exceeds the preset threshold value, the outer wall and the end face of the intrusive sensor are cleaned, and the detection precision is recovered.

According to the open-channel multichannel ultrasonic flowmeter verification system, water in a reservoir is pumped out through an axial flow pump, then water flow is buffered through a buffer pool, when the water flows into a channel unit, the water is blocked through an overflow plate and then treated through a flow stabilizing grid, and then stable water flow with a certain height is formed; after the water flows to the middle and downstream positions of the channel unit, the water passes through the ultrasonic flow meter, the ultrasonic flow meter measures the flow rate, flow velocity and other numerical values of the stable water flow, and the numerical values are all received by the control unit and then are stored, processed and analyzed. The working efficiency of the axial flow pump and the opening degree of the valve plate of the drainage door unit can be adjusted separately or jointly, so that different testing environments are formed, the control unit obtains more basic data, and the verification accuracy is improved.

The utility model relates to a corrosion-resistant electromagnetic flowmeter. Two ends of the measuring pipeline are respectively provided with a left-end flange and a right-end flange, the measuring pipeline, the left-end flange and the right-end flange are made of engineering plastics and are of an integrated injection molding structure, and an upper measuring electrode and a lower measuring electrode which are longitudinally opposite are arranged in the middle of the top wall and the middle of the bottom wall of the measuring pipeline; the device further comprises a front shell and a rear shell which clamp the measuring pipeline in the middle, coil supports are arranged in the front shell and the rear shell, excitation coils are installed on the coil supports, and the two excitation coils are located in front of the middle of the measuring pipeline and behind the middle of the measuring pipeline respectively. A front half flange plate is arranged at the top of the front shell, a rear half flange plate is arranged at the top of the rear shell, the front half flange plate and the rear half flange plate form a top flange when the front shell and the rear shell are assembled in a butt joint mode, the gauge head is provided with a display screen in the front and a gauge head support at the bottom, and the bottom of the gauge head support is fixedly connected with the top flange. According to the corrosion-resistant electromagnetic flowmeter, the corrosion-resistant capacity is improved on the basis that the structural characteristics of the flowmeter body are guaranteed.

The anti-blocking intelligent Internet of Things water meter comprises a meter body, the two sides of the meter body are fixedly communicated with a water inlet pipe and a water outlet pipe correspondingly, the side, away from the meter body, of the water inlet pipe is fixedly communicated with a sundry intercepting pipe, and the bottom of the sundry intercepting pipe is fixedly communicated with a sundry treatment pipe with the lower end closed. An inclined filter screen is fixed to the position, close to a water inlet of the sundry treatment pipe, in the sundry intercepting pipe and located on the side, close to the meter body, of the water inlet of the sundry treatment pipe, and the side wall of the sundry treatment pipe and the bottom of the meter body are fixed and communicated through a flow dividing pipe. A circular ring body is fixed to the position, close to the water inlet, of the inner wall of the sundry treatment pipe, a flexible net bag is fixed to the bottom of the circular ring body, and the sundry intercepting pipe and the sundry treatment pipe are jointly provided with a crushing mechanism used for crushing large-size sundries. The crushing mechanism can intercept large-size impurities in water flow entering the impurity intercepting pipe and crush the large-size impurities.

This present disclosure provides reliable methods and apparatus for delivering microdroplets containing an active pharmaceutical ingredient (API) to underlying substrates. A control system is provided to ensure that the API dosage is both accurate and repeatable.

The invention relates to the technical field of flow monitoring, and discloses an internal flow monitoring system for a mine paste filling anti-blocking pipe. Comprising a filling pipeline identification module, a risk pipeline analysis module, a pipeline analogue simulation module, a simulated pipeline simulation model, an attenuation rate calculation module, a flow attenuation rate calculation module, a pipeline flow early warning module and a pipeline flow early warning module, wherein the filling pipeline identification module is used for identifying filling pipelines in a filling pipe network; the risk pipeline analysis module is used for identifying risk pipelines with blockage risks; corresponding flow early warning information is formulated; according to the method, the flow change conditions of the risk pipeline at different time lines can be continuously monitored, and meanwhile, an analysis basis can be provided for the probability and severity of paste blockage in a subsequent filling pipe network; the dynamic change trend of the paste flow in the filling pipe network is accurately and flexibly monitored from the physical structure level and the virtual digital level, and the phenomenon that the filling pipe network is blocked by the paste is effectively avoided.

The utility model provides a rectifier of an ultrasonic flowmeter, and particularly relates to the technical field of gas flow. The rectifier of the ultrasonic flow meter comprises a first rectifying element. Wherein the first rectifying element comprises a perforated plate, an air chamber is arranged on one side of the perforated plate, a plurality of through holes are formed in the perforated plate, and the through holes are communicated with the air chamber. A gap is formed between the peripheral edge of the porous plate and the inner side wall of the gas chamber; gas penetrates through the gap and the through holes and enters the gas chamber. Therefore, the first rectifying element adopted by the rectifier of the ultrasonic flowmeter comprises the perforated plate structure, the perforated plate is combined with the gas chamber, gas penetrates through the gap between the perforated plate and the gas chamber and the through holes in the perforated plate to enter the gas chamber, secondary flow energy is dissipated, a wall surface laminar flow boundary layer is reduced, and the flow rate of the flow is increased. And vortex falling caused by low-speed gas flow separation is prevented.

A measuring transducer includes: a transducer module including a housing and a coil within and connected with the housing; and, set in the transducer module, a transducer module including a tube and a magnet secured on a middle segment of the tube. The tube wall is so formed that a directrix of a channel surface of the middle segment extends outside a first reference plane of the measuring transducer defined by first and fourth reference axes, and the magnet is secured on the middle segment such that a second reference plane of the measuring transducer defined by second and fourth reference axes is parallel to a third reference plane defined by third and fifth reference axes or that the second and third reference planes intersect one another to form an angle of intersection of no more than 1°.

The invention discloses an anti-clogging high-precision liquid flow sensor, and belongs to the technical field of liquid flow sensors, the anti-clogging high-precision liquid flow sensor comprises a shell, a linkage mechanism is arranged in the shell, the linkage mechanism comprises a fixing frame, a bearing, a rotating shaft, a turbine and a signal blade, one end of the rotating shaft is provided with a transmission mechanism, and the other end of the rotating shaft is provided with a transmission shaft; an electromagnet and a flushing mechanism are arranged at the bottom of the shell, the flushing mechanism comprises an electromagnetic valve and a flushing pipe, the flushing pipe is communicated with one end of the electromagnetic valve, the other end of the electromagnetic valve is communicated with a vertical pipe, and the top end of the vertical pipe is communicated with the shell. By introducing an intelligent blockage monitoring mechanism based on mechanical transmission and pressure sensing, the reliability and the pre-maintenance capability of the sensor are remarkably improved, and by integrating a set of on-line high-pressure flushing system triggered by a controller instruction, the self-cleaning function of the interior of a sensor flow channel is achieved; and the long-term cleanness and the measurement precision of the core measurement part are effectively guaranteed.

The utility model relates to electromagnetic flowmeter technical field, the utility model discloses a kind of electromagnetic flowmeter transmitter with temperature measurement, including through power supply circuit and signal isolation circuit connection control circuit and signal processing circuit, the signal processing circuit includes the wiring terminal J8 of realizing multiple wiring mode;Based on the selective connection temperature sensor of wiring terminal J8, temperature signal is connected to the input end of operational amplifier UT1A by analog switch U18 output, based on the input end of analog-digital converter U19 connected to the output end of operational amplifier UT1A;The control pin of analog-digital converter U19 is connected to control circuit, for controlling the collection and transmission of data, the utility model is through integrated multifunction and flexible measurement mode, high precision, high flexibility, low cost, high reliability and strong anti-interference ability are realized, the efficiency and performance of industrial measurement system are significantly improved.

The invention relates to the technical field of fuel nozzle performance testing, in particular to an integrated high-precision fuel flow testing method and detection method.The testing method comprises the steps that a spraying test bed or a nozzle test bed is correspondingly selected based on whether a to-be-tested workpiece tests the spraying angle or not; after the integrated high-precision fuel oil flow testing device is in a reset state, a corresponding motor rotating speed is input to a digital control system based on the calibrated flow of the workpiece to be tested, a plunger pump of a high-pressure oil supply system is started, and oil liquid in an oil tank system is pumped to a corresponding spray test bed or nozzle test bed to run; the actual pressure difference of the workpiece to be measured is collected and transmitted to the digital control system, the actual pressure difference and the target pressure difference are compared, and the actual pressure difference is adjusted; when the preliminarily obtained actual oil flow is larger than a detection threshold value, the actual oil flow corresponding to the current flowmeter is defined as corresponding detection data; and when the preliminarily obtained actual oil flow is smaller than or equal to the detection threshold value, a weighing method is adopted for flow detection.

The invention belongs to the technical field of gas field water flow meter measurement, and particularly discloses a two-phase flow measuring device and method resistant to oil and gas field water corrosion. The device is used for measuring gas field water in a pipeline and is matched with a flow totalizer. Comprising a first differential pressure flowmeter used for measuring the mass flow of gas in a pipeline, a second differential pressure flowmeter used for measuring the mass flow of liquid in the pipeline, a temperature sensor used for measuring the temperature of the gas in the pipeline, and a liquid level differential pressure transmitter used for measuring the liquid level in the pipeline. The temperature sensor, the first differential pressure flow meter, the second differential pressure flow meter and the liquid level differential pressure transmitter are respectively connected with the flow totalizer. According to the invention, the problems of gas and liquid two-phase flow measurement, accurate sulfur-containing gas field water measurement and the like can be solved under the condition that gas field water components contain corrosive (especially sulfur-containing components), non-full pipe flow and liquid phase flow velocity.

The invention discloses a low-vortex prewhirl nozzle casing air flow rapid detection clamp and a detection method, the clamp mainly comprises a base, a supporting seat, an air inlet pipe, an air outlet pipe, an upper sealing support plate, a lower sealing support plate, a pressing plate and the like, the supporting seat supports and seals a front installation edge large spigot and a rear installation edge large spigot of a low-vortex prewhirl nozzle casing, and the pressing plate supports and seals the front installation edge large spigot and the rear installation edge large spigot of the low-vortex prewhirl nozzle casing. The lower sealing support plate is used for sealing and radially restraining the small seam allowance of the rear mounting edge, and the upper sealing support plate is used for sealing and radially restraining the large seam allowance and the small seam allowance of the front mounting edge, so that all cavities of the low-vortex pre-swirl nozzle cartridge receiver are sealed. When the air flows of two different paths are measured, the clamp only needs to be clamped once, the clamp does not need to be detached in the middle, and the air flows of different outlets can be measured only by pressing the lower sealing support plate or loosening the lower sealing support plate. According to the invention, the prominent problems of slow test and air leakage are solved, and rapid detection data are provided for optimization of the low-vortex pre-swirl nozzle casing flow channel.

The application belongs to the technical field of gas flow meters, and discloses a gas flow meter which comprises a connecting pipe fitting and a core processing piece, and further comprises a water removal assembly installed in the connecting pipe fitting and used for removing water in the gas in the connecting pipe fitting, and a sealing assembly arranged in the middle of the connecting pipe fitting and used for sealing a connecting point of the water removal assembly and the connecting pipe fitting. The gas flow meter is provided with a cooperation of a plug-in opening and a porous water absorption plate, so that the water in the gas can be absorbed by the porous water absorption plate, and the formation of condensed water on the surface of the temperature sensor due to the water is avoided. The porous water absorption plate is inserted into the plug-in opening until the porous water absorption plate abuts against the bottom limiting plate, and then the porous water absorption plate is fixed. When the gas containing water passes through the porous water absorption plate, the porous water absorption plate absorbs the water in the air, so that the gas passes through the temperature sensor under the condition that the temperature is unchanged.