Abrégé

The present invention relates to the technical field of flow measurement, and disclosed are a flow sensor and a Coriolis flowmeter. The flow sensor comprises flow tube families, drivers, and vibration signal detectors. The drivers and the vibration signal detectors are provided on the flow tube families. The flow tube families comprise at least one straight flow tube family and at least one bent flow tube family, and measurement regions of the straight flow tube family and the bent flow tube family are oppositely and independently arranged. Flow tubes in the straight flow tube family are straight flow tubes, and flow tubes in the bent flow tube family are bent flow tubes. Each flow tube family comprises at least two flow tube groups, and, among all of the flow tube groups, at least one group of flow tubes having the same size and geometry are arranged. Two ends of the flow tubes having the same size and geometry are connected by means of node plates. The Coriolis flow meter comprises a flow transmitter and the described flow sensor. According to the present invention, the overall size can be reduced, mounting is convenient, and the characteristics of both bent flow tubes and straight flow tubes can be considered.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique

Abrégé

A flow measurement tube (100), comprising an inlet tube (1), a middle tube (2), and an outlet tube (3) which are communicated in sequence, wherein a height difference exists between the axis of the middle tube (2) and the axis of the inlet tube (1). The inlet tube (1) and the outlet tube (3) of the flow measurement tube (100) are straight tubes, and a height difference exists between the middle tube (2) and each straight tube, that is, the flow measurement tube (100) is bent; when the flow measurement tube (100) is applied to flow measurement, the frequencies of a working mode and an orthogonal mode are different, thereby avoiding affecting the flow measurement; meanwhile, since the flow measurement tube (100) is bent, the rigidity of the flow measurement tube (100) is reduced, thereby facilitating improving the signal sensitivity caused by the flow; in addition, compared with a single straight tube, the constraints at both ends of the flow measurement tube (100) are reduced, and the anti-stress interference capability is improved. Also provided is a flowmeter (200) comprising the flow measurement tube (100), wherein there is at least one flow measurement tube (100). By adopting the flow measurement tube (100), the measurement performance of the flowmeter (200) can be effectively improved.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique

Abrégé

Disclosed is a Coriolis flowmeter comprising a plurality of measurement areas. The Coriolis flowmeter comprises a flow tube and a flow transmitter. The flow tube comprises at least a first measurement area and a second measurement area. A first driving device and a first measurement device are mounted in the first measurement area, and a second driving device and a second measurement device are mounted in the second measurement area. The first measurement device and the second measurement device are both connected to the flow transmitter so as to transmit measurement values of the first measurement device and the second measurement device to the flow transmitter. The first measurement area uses the Coriolis principle to measure at least one of the mass flow and the density of an internal medium, and the second measurement area and the first measurement area both measure the mass flow and/or the density of the internal medium. Compared with the prior art, in the present invention, measurement values of a same parameter of a medium in a flow tube in two measurement areas are compared, so that a measurement result can be verified online, and a high-precision real-time diagnosis method based on sensor design is provided, thereby avoiding production interruption caused by regular calibration of the Coriolis flowmeter.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01F 25/10 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume des débitmètres
• G01N 9/32 - Recherche du poids spécifique ou de la densité des matériauxAnalyse des matériaux en déterminant le poids spécifique ou la densité en utilisant les propriétés d'écoulement des fluides, p. ex. l'écoulement à travers des tubes ou des ouvertures
• G01N 11/04 - Recherche des propriétés d'écoulement des matériaux, p. ex. la viscosité, la plasticitéAnalyse des matériaux en déterminant les propriétés d'écoulement en mesurant l'écoulement du matériau à travers un passage étroit, p. ex. un tube, une ouverture

Abrégé

Disclosed in the present invention are a flow divider and a Coriolis flowmeter, wherein the flow divider is of a cylindrical structure, N branch flow guide ports are formed in the cylinder bottom of the flow divider, and N is a positive integer not less than 2. The branch flow guide ports are non-circular. The total area of the N branch flow guide ports is S1, and the flow divider satisfies the following conditions: if the N non-circular branch flow guide ports are replaced with N circular branch flow guide ports, and the maximum total area of the N circular branch flow guide ports is S2, S1>S2. Compared with the prior art, the present invention can increase the integral cross sectional area of the N branch flow guide ports of the flow divider, and under the condition of certain pressure, the flow of the flow divider is greatly increased, and the pressure loss is greatly reduced.

Classes IPC  ?

• F16L 41/02 - Ensembles de branchements, p. ex. d'une seule pièce, soudés à l'autogène, rivetés
• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique

Abrégé

Some embodiments of the disclosure provide a Coriolis mass flowmeter with a non-circular section. In some examples, the mass flow meter includes a flow inlet device and a flow outlet device. The flow inlet device and the outlet device each include a flange connecting disc, a flange sealing disc, a connector, and a flow tube. The flange sealing disc is attached to the outer surface of the flange connecting disc. The connector is connected to the flange connecting disc. A body of the flow tube is located in the connector, and an outlet of the flow tube is connected to the flange sealing disc. The cross section of a measurement body of the flow tube is a circular cross section, and the cross section of the outlet of the flow tube is a non-circular cross section.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01F 15/18 - Supports ou moyens de raccordement pour les compteurs

Abrégé

Systems embodiments of the disclosure provide a Coriolis mass flowmeter with a built-in supporting structure. In some examples, the Coriolis mass flowmeter includes a first flow divider, a second flow divider, a support tube, a first case, a second case, and a flow tube. One end of the flow tube is connected to the first flow divider, and another end of the flow tube is connected to the second flow divider. The first flow divider and the second flow divider are fixed by the support tube, the first case is connected to the first flow divider and the second flow divider, the second case is connected to the first flow divider and the second flow divider, the first case is connected to the second case, and the first case and the second case are wrapped around the support tube and the flow tube.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01F 15/18 - Supports ou moyens de raccordement pour les compteurs

Abrégé

In some embodiments, the disclosure provide a Coriolis flowmeter with multiple flow tubes, including a flow sensor and a flow transmitter is provided. The flow sensor includes a sensor housing, a sleeve, and two symmetrical flanges. A sensor assembly is arranged in the sensor housing, and the sensor assembly includes at least two flow tube groups, each flow tube group includes at least two flow tubes. Two flow tubes with the same size and geometry in different groups form a flow tube pair. At least two flow tube pairs are provided by at least two flow tube groups, each flow tube pair is fixedly connected together by at least one pair of node plates, a measurement area of the flow tubes is between an innermost pair of node plates, and each flow tube group is connected to a driver and a detector.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique

Abrégé

A multi-flow-tube Coriolis flowmeter, comprising a flow sensor (17) and a flow transmitter (18). The flow sensor (17) comprises a sensor casing (19), a sleeve (20), and two symmetrical flanges (21). A sensor assembly is provided in the sensor casing (19). The sensor assembly comprises at least two flow tube sets. Each flow tube set comprises at least two flow tubes (1, 2, 3, 4). Two flow tubes having the same size and geometric shape in different sets form a flow tube pair. At least two flow tube pairs are formed in the at least two flow tube sets. Each flow tube pair is fixedly connected by using at least one pair of gusset plates (5, 6, 7). A measurement region of the flow tubes is formed between the pair of gusset plates (5, 6, 7) located on the innermost side. Each flow tube set is connected to a driver (12, 1201, 1202) and detectors (13, 1301, 1302). The flowmeter can realize optimal coupling of flow tubes of the same set and facilitates vibration isolation from the outside.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01N 9/32 - Recherche du poids spécifique ou de la densité des matériauxAnalyse des matériaux en déterminant le poids spécifique ou la densité en utilisant les propriétés d'écoulement des fluides, p. ex. l'écoulement à travers des tubes ou des ouvertures

Abrégé

A Coriolis mass flowmeter using a built-in supporting structure, comprising a first splitter (1a), a second splitter (1b), a support tube (3), a first case (2a), a second case (2b), and a flow tube. One end of the flow tube is connected to the first splitter (1a), and the other end of the flow tube is connected to the second splitter (1b). The first splitter (1a) and the second splitter (1b) are fixed by means of the support tube (3); the first case (2a) is located on the front side of the Coriolis mass flowmeter and is connected to the first splitter (1a) and the second splitter (1b); the second case (2b) is located on the back side of the Coriolis mass flowmeter and is connected to the first splitter (1a) and the second splitter (1b); the first case (2a) is connected to the second case (2b); and the first case (2a) and the second case (2b) are wrapped around the support tube (3) and the flow tube. The full-wrapping design solution effectively reduces the negative impact on the product performance that is caused when a welding stress generated during case welding is transmitted to a measurement area.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01F 15/00 - Détails des appareils des groupes ou accessoires pour ces derniers, dans la mesure où de tels accessoires ou détails ne sont pas adaptés à ces types particuliers d'appareils, p. ex. pour l'indication à distance
• G01F 15/18 - Supports ou moyens de raccordement pour les compteurs

Abrégé

A Coriolis mass flowmeter with a non-circular section. The mass flow meter comprises a flow inlet device and a flow outlet device. The flow inlet device and the outlet device each comprise a flange connecting disc (1), a flange sealing disc (2), a connector (3) and a flow tube (5a, 5b). The flange sealing disc (2) is attached to the outer surface of the flange connecting disc (1). The connector (3) is connected to the flange connecting disc (1). The main body of the flow tube (5a, 5b) is located in the connector (3), and an outlet of the flow tube (5a, 5b) is connected to the flange sealing disc (2). The cross section of a measurement body of the flow tube (5a, 5b) is a circular cross section, and the cross section of the outlet of the flow tube (5a, 5b) is a non-circular cross section. On the premise of ensuring that the function and performance of the Coriolis mass flowmeter are not affected, the design and manufacturing process of a Coriolis mass flowmeter sensor is greatly simplified, and the production and manufacturing cost of the sensor is effectively reduced.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01F 15/00 - Détails des appareils des groupes ou accessoires pour ces derniers, dans la mesure où de tels accessoires ou détails ne sont pas adaptés à ces types particuliers d'appareils, p. ex. pour l'indication à distance
• G01F 15/18 - Supports ou moyens de raccordement pour les compteurs

Abrégé

A node plate for a bent-tube Coriolis flowmeter, comprising a plate body. The plate body comprises at least two through holes. The through holes are used for placing bent tubes of the Coriolis flowmeter. The shape of the node plate is asymmetrical with respect to an axis formed by a central connecting line of tube perforations. According to the node plate, reverse asymmetrical mechanical parameters generated by an asymmetrical design are used to compensate for asymmetrical vibration at the node plate, and the vibration is limited in a measurement area as much as possible.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01F 15/00 - Détails des appareils des groupes ou accessoires pour ces derniers, dans la mesure où de tels accessoires ou détails ne sont pas adaptés à ces types particuliers d'appareils, p. ex. pour l'indication à distance

Abrégé

A method for detecting a high-precision Coriolis flowmeter, comprising vibration signal collection, signal conditioning, and signal processing. At least two time difference signals are obtained by processing at least four vibration signals. At least two mass flow rates are obtained by calculating all the time differences. A processing module averages all the obtained mass flow rates within a threshold range and then gives a more accurate flow measurement value so as to reduce the uncertainty of measurement. As long as a mass flow rate is not within a set threshold range, an alarm signal can be sent to remind the replacement of the flowmeter, and thus, the purpose of flowmeter fault detection and alarm can be achieved.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique

Abrégé

Provided is a Coriolis mass flowmeter with a non-circular section. The mass flow meter includes a flow inlet device and a flow outlet device. The flow inlet device and the outlet device each include a flange connecting disc (1), a flange sealing disc (2), a connector (3) and a flow tube (5a, 5b). The flange sealing disc (2) is attached to the outer surface of the flange connecting disc (1). The connector (3) is connected to the flange connecting disc (1). A body of the flow tube (5a, 5b) is located in the connector (3), and an outlet of the flow tube (5a, 5b) is connected to the flange sealing disc (2). The cross section of a measurement body of the flow tube (5a, 5b) is a circular cross section, and the cross section of the outlet of the flow tube (5a, 5b) is a non-circular cross section.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01F 15/18 - Supports ou moyens de raccordement pour les compteurs

Abrégé

A Coriolis flowmeter with multiple flow tubes, including a flow sensor (17) and a flow transmitter (18) is provided. The flow sensor (17) includes a sensor housing (19), a sleeve (20), and two symmetrical flanges (21). A sensor assembly is arranged in the sensor housing (19), and the sensor assembly includes at least two flow tube groups, each flow tube group includes at least two flow tubes (1, 2, 3, 4). Two flow tubes with the same size and geometry in different groups form a flow tube pair. At least two flow tube pairs are provided by at least two flow tube groups, each flow tube pair is fixedly connected together by at least one pair of node plates (5, 6, 7), a measurement area of the flow tubes is between an innermost pair of node plates (5, 6, 7), and each flow tube group is connected to a driver (12, 1201, 1202) and a detector (13, 1301, 1302). The flowmeter can achieve the optimal coupling of the flow tubes in the same group, and is beneficial to the vibration isolation from the outside.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique

Abrégé

A Coriolis mass flowmeter using a built-in supporting structure, including a first flow divider, a second flow divider, a support tube, a first case, a second case, and a flow tube. One end of the flow tube is connected to the first flow divider, and an other end of the flow tube is connected to the second flow divider. The first flow divider and the second flow divider are fixed by the support tube; the first case is connected to the first flow divider and the second flow divider; the second case is connected to the first flow divider and the second flow divider; the first case is connected to the second case; and the first case and the second case are wrapped around the support tube and the flow tube.

Classes IPC  ?

• G01F 1/84 - Débitmètres massiques du type Coriolis ou gyroscopique
• G01F 15/18 - Supports ou moyens de raccordement pour les compteurs