7 results about "Positive displacement meter" patented technology

The invention discloses a volumetric flow meter, which relates to the technical field of flow measurement and comprises a metering assembly, a sensing assembly, a valve group assembly and a control and protection assembly. The metering assembly is a transparent buffer tank with the volume of 300-500 mL and provides a fixed metering volume; the sensing assembly detects liquid level changes through a PNP type liquid level sensor, and the valve set assembly comprises a high-precision proportion adjusting valve (the adjusting precision is 0.5%). The control assembly calculates flow based on fixed volume and high-precision timing, supports single-time, periodic and continuous measurement modes, can cooperatively control at most eight dosing branches to realize uniform distribution, and also can detect pipeline leakage. The protection assembly is an IP65-level outdoor control cabinet and has a low-temperature anti-freezing function. The problems that a traditional flow meter is uneven in distribution, large in small flow error, difficult to find damage and the like are solved, the measurement precision is within + / -0.5%, and the flow meter is suitable for sewage treatment, chemical agent adding and other scenes, convenient to operate and maintain and high in stability.

The utility model discloses an integrated volumetric flowmeter relates to flowmeter equipment technical field, including flowmeter main part, first connecting pipe, second connecting pipe, protective housing no.

A volumetric meter having a roller configured for rotation within a housing aperture of a roller housing. A plurality of chambers of the roller are used for metering an agricultural commodity, each chamber being defined by at least a pair of flutes. In controlling an amount or height of the commodity displaced from an inlet of the roller housing and into the housing aperture with the rotation of the roller, the volumetric meter can include a sweep assembly having a sweep body that includes a compliant sweeper portion. As the roller rotates, the compliant sweeper portion can be configured to be displaced, including deformed, bent, or deflected, by a force exerted on the sweeper portion by agricultural commodity while still providing a barrier to a displacement of at least some commodity into the housing aperture to assist in preventing commodity from becoming wedged between the flutes and the roller housing.

The present invention relates to the field of gas-liquid metering technology, and is a volumetric gas-liquid two-phase flowmeter, comprising a first volumetric flowmeter, a second volumetric flowmeter, a first pressure transmitter, a second pressure transmitter and a differential pressure tube. The present invention has a reasonable and compact structure and is easy to use. During use, the volumetric flowmeter is used for measurement, and the results are more accurate. The pressure transmitter can measure a wide range of media, such as oil, water, etc., and has a certain anti-corrosion ability; high accuracy and high stability; the differential pressure tube creates a corresponding pressure difference between the front and rear ends of the differential pressure tube through other methods such as diameter reduction, and finally calculates the volume occupied by the liquid and measures the volume of the gas and liquid. During the metering process, there is no need to separate the gas-liquid two-phase mixed fluid, which greatly reduces the volume and cost of the equipment. Continuous metering can also be performed, and the structure sealed with the outside is safer and more reliable, with the characteristics of safety, labor saving, simplicity and high efficiency.

The application discloses a carbon fiber rotor volumetric flowmeter, which comprises a shell, a central shaft rotatingly arranged in the shell, and an inlet main flow channel and an outlet main flow channel formed in the shell; a support is fixed on the central shaft and has a plurality of supporting arms, each of which is provided with an inlet branch flow channel and an outlet branch flow channel; a first end cover is arranged at one end of the shell and is provided with a cam groove, a plurality of variable-volume metering units are respectively arranged on the supporting arms, and a flow distribution sleeve is fixed at the other end of the shell and is sleeved on the central shaft; the support is arranged on the central shaft, the variable-volume metering units are distributed in the circumferential direction of the support, the cam groove on the first end cover drives the variable-volume metering units to axially stretch and shrink to realize the periodic change of the volume, and the rotation of the flow distribution sleeve and the central shaft is matched to realize intermittent flow distribution, so that the volumetric fluid metering without rigid engagement is realized, and the problems of the traditional flowmeter, such as friction and wear, increased gap and influenced metering precision, are solved.

The application discloses a kind of gas-liquid two-phase flow measurement system and measurement method described ultrasonic flowmeter and described positive displacement flowmeter are sequentially arranged in sequence on the first pipeline;Described ultrasonic flowmeter is equipped with pressure measurement unit;Temperature measurement unit is equipped between described ultrasonic flowmeter and described positive displacement flowmeter;Described ultrasonic flowmeter is used to measure the flow value of fluid passing in a certain time;Described positive displacement flowmeter is used to measure the flow value of fluid passing in a certain time.The beneficial effects of the application are that by simultaneously increasing ultrasonic flowmeter and positive displacement flowmeter in the first pipeline, the flow of gas-liquid two-phase flow in the pipeline is measured respectively, and the gas phase flow value and the liquid phase flow value are calculated through the calculation relationship of the fluid in the pipeline, realizing the process of real-time online detection of gas phase flow value and liquid phase flow value without separating gas-liquid two-phase flow.

The utility model discloses a strong acid and strong alkali resistant volumetric flowmeter which comprises a flowmeter body, a metering groove used for containing a pair of meshed metering gears is formed in the flowmeter body, an upper cover is installed at the upper end of the flowmeter body, and the inner surface of the upper cover and the metering groove jointly define a closed metering cavity. A bottom plate is installed on the bottom face of the flowmeter body, and a top cover is installed on the upper cover. According to the volumetric flow meter, the situation that a volumetric flow meter at the present stage is not suitable for hydrochloric acid, hydrofluoric acid, sodium hydroxide and other strong acid and strong alkali media is improved, the metering cavity body and the upper cover which are integrally formed are adopted, and it is guaranteed that the strong acid and strong alkali resistant volumetric flow meter can achieve the 3MPa pressure resistance capacity.