CN113532553A

CN113532553A - Liquid flowmeter

Info

Publication number: CN113532553A
Application number: CN202110676825.5A
Authority: CN
Inventors: 章圣意; 林景殿; 黄象克; 林恒
Original assignee: Zhejiang Cangnan Instrument Group Co ltd
Current assignee: Zhejiang Cangnan Instrument Group Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-10-22

Abstract

The invention discloses a liquid flowmeter, which comprises an outer pipe with the same diameter as that of a pipeline to be measured, a liquid inlet, a liquid outlet, a shell, a plurality of measuring pipes fixed inside the outer pipe and a processor used for calculating related parameters according to data collected by the measuring pipes, wherein the length of each measuring pipe is the same as that of the outer pipe, the extension directions of the measuring pipes and the outer pipe are parallel and consistent with the flowing direction of fluid, the measuring pipes are placed in the outer pipe to divide the fluid from the outside, one part of the fluid flows through the measuring pipes, the other part of the fluid flows through the outer pipe, each measuring pipe is provided with a sensor for measuring the fluid parameters, the sensor is connected with the processor, the processor is installed in the shell, the shell is fixedly connected with the outer side wall of the outer pipe, and two ends of the outer pipe are provided with flanges connected with the fluid pipe. The invention divides the space of the flowmeter by optimizing the structure of the flowmeter, and can calculate the total flow passing through the flowmeter by utilizing the flow passing through the internal measuring pipe.

Description

Liquid flowmeter

Technical Field

The invention relates to the field of flowmeters, in particular to a liquid flowmeter suitable for large calibers.

Background

In the industrial production process, substances are conveyed and distributed in a pipeline system, so that the flow rate, the quality, the density and other parameter data of fluid in the pipeline are required to be measured for the convenience of industrial production, and the existing flow meters comprise a coriolis flow meter, a magnetic flow meter, an ultrasonic flow meter, a vortex flow meter, a differential pressure flow meter and the like according to the working principle and the measurement requirement.

When the flowmeter is used in a large-caliber pipeline, the problems that the volume of the flowmeter is overlarge due to the limitation of the working principle of the flowmeter, or the measurement requirement cannot be met due to the size limitation and the like can occur.

In order to solve the problems, the invention patent of patent No. 200710044009.2 provides a vortex shedding flowmeter, which comprises a large-caliber measuring tube and a small-caliber magnetoelectric vortex shedding flowmeter, and is characterized in that the magnetoelectric vortex shedding flowmeter is inserted into the large-caliber measuring tube. Thereby measuring the relevant flow data.

The structure solves the problem that the large-caliber pipeline is difficult to measure to a certain extent. However, because the fixed small-caliber vortex shedding flowmeter generates blocking structures such as barriers in the pipeline, due to the flowing characteristic of liquid, when the blocking structures occur in the pipeline, the pressure at the downstream in the pipeline is reduced, so that the measurement accuracy is influenced, and the structure can only measure the flow velocity of the liquid and cannot measure parameters such as density, mass, flow and the like.

Disclosure of Invention

In order to solve the problems that in the prior art, the liquid flow parameters of a large-diameter pipeline are difficult to measure, the measurement accuracy is low and the like, the invention provides a liquid flowmeter structure.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a liquid flowmeter, liquid flowmeter include that the diameter is fixed with outer tube, fluid entry, fluid outlet, casing, a plurality of that the measured pipeline diameter is the same survey buret inside, be used for calculating out the treater of relevant parameter according to surveying buret collection data, survey buret length and outer tube and be the same, survey buret and be parallel with outer tube extension degree direction and unanimous in fluid flow direction, survey buret and will come from outside fluid shunting, partly flow through survey buret, and other parts flow through the outer tube, every is surveyed the sensor that has the measurement fluid parameter on surveying buret, the sensor is connected with the treater, the treater is installed in the casing, the casing links firmly with the outer tube lateral wall, and the outer tube both ends are equipped with the ring flange with fluid piping connection.

The core discovery of the present invention is that by measuring a portion of the parameters of the fluid through the measurement tube and scaling the parameters to reflect the combined flow, the same measurement accuracy as a small conventional flow meter is provided. Can be by a plurality of parts behind the fluid inflow flowmeter, from measuring intraduct, flow in between buret and the outer tube, carry out the confluence behind the outflow flowmeter, because it can use thin wall pipe isotructure to survey buret, its velocity of flow of fluid and pressure can not receive the influence, thereby guarantee measuring precision, the fluid parameter of inflow sensor can be measured to the sensor in the buret, including not being limited to the velocity of flow, density, quality etc, different measurement parameter can be realized by installing different sensors in surveying the buret, the sensor in surveying the buret is connected with the treater, thereby the treater can carry out the accounting according to the data of collecting and obtain the whole fluid parameter of flow through the flowmeter. The structure can measure the large-caliber fluid parameters under the condition of not influencing the fluid parameters, and improves the measurement precision.

The aforesaid is surveyed buret quantity and is 1, is located the outer tube center, the flowmeter includes the floor, it is fixed through the floor to survey between buret lateral wall and the outer tube inside wall.

The total flow Q of fluid passing through the flowmeter is divided into Q1 and Q2, the flow through measuring the pipe is Q1, flow through between outer tube and the measuring pipe is Q2, under the known circumstances of measuring the pipe cross section, can be clear understand the cross section ratio that Q1 and Q2 passed through, can calculate the total value of Q according to the cross section ratio when measuring Q1, because floor and measuring pipe all can use thin wall material, can not exert an influence to the total flow, can promote measurement accuracy, satisfy the flow measurement requirement of heavy-calibre pipeline.

The measuring pipe quantity is 2 and more than 2, the measuring pipes are adjacent and at least one part of the outer surface of each measuring pipe is contacted.

The measuring pipe number is 2, the outer diameter of the measuring pipe is equal to the inner radius of the outer pipe, and the side wall of the measuring pipe is fixedly connected with the inner wall of the outer pipe.

In order to improve the measurement accuracy, a plurality of measuring tubes can be arranged in the outer tube, the flow flows through different measuring tubes and gaps between the outer tube and the measuring tubes, corresponding flow data are measured in the measuring tubes respectively, relevant parameters are calculated through the processor, and measuring sensors with different structures can be adopted for the measuring parameters according to needs.

The flow meter described above includes an actuator that vibrates the measurement pipe, and the sensor is an amplitude sensor. When liquid flows through the measuring tube, the brake prompts the flow tube to vibrate, vibration amplitudes can be different due to different flow rates of the fluid, the sensor can measure parameters flowing through the measuring tube by detecting the vibration amplitudes and transmits the parameters to the processor, and the processor can obtain the parameters of the fluid after calculating the parameters of the fluid flowing through the measuring tube.

The lateral wall includes the ultrasonic transmission receiving arrangement who measures the fluid velocity of flow on the aforesaid survey buret, ultrasonic transmission receiving arrangement quantity is two, but the ultrasonic wave of mutual receipt transmission is set up along fluid flow direction relatively, the sensor is ultrasonic sensor. The measuring tube is provided with an ultrasonic transmission receiving device for measuring the flow velocity of fluid, the ultrasonic transmission receiving device is arranged along the flow direction of the fluid, and the sensor is an ultrasonic sensor.

Because the propagation speed of ultrasonic waves in the fluid is related to the running speed of the fluid, the ultrasonic wave transmitting and receiving device is arranged along the flowing direction of the fluid, the forward ultrasonic wave transmission time and the backward ultrasonic wave transmission time generate difference values, the sensor can transmit the difference value signals to the processor, and the processor can obtain the parameters of the finishing fluid after calculating the parameters of the fluid flowing through the measuring tube.

The measuring tube is internally provided with a partition plate, the partition plate is provided with a through hole, and the sensors are pressure sensors respectively arranged on two sides of the partition plate.

The measuring pipe is internally provided with a partition plate with a through hole, fluid can generate pressure difference on two sides of the partition plate after flowing through the through hole, the higher the flow rate of the fluid is, the larger the generated pressure difference is, the pressure difference change on two sides of the partition plate is measured through a sensor, signals are transmitted to a processor, and the processor can obtain the parameters of the fluid after calculating the parameters of the fluid flowing through the measuring pipe.

The flowmeter comprises an electrical level, an electromagnetic coil and a coil driver, wherein the electrical level is arranged on the side wall of the measuring pipe, the electromagnetic coil and the coil driver are connected with the electrical level, the coil driver drives the measuring pipe through the electrical level, a closed circuit is formed among the electrical level, the electromagnetic coil and the coil driver, and the sensor is a voltage sensor.

The coil driver drive circuit is followed through the electric level formation electromagnetic field at the survey buret, and the fluid can cause the fluctuation to magnetic field voltage after flowing through the electromagnetic field, can measure fluid parameter through measuring voltage fluctuation, passes to the treater with signal transmission after collecting the signal through the sensor, and the treater can obtain the arrangement fluid parameter after calculating the parameter of the measuring pipe fluid of flowing through.

A blocking block is arranged in the measuring tube, the blocking block is a triangular prism, the sensor is positioned at the downstream of the blocking block, and the sensor is a vortex street sensor.

When the fluid flows through the blocking block, symmetrical vortex flow can be generated, the frequency and the generated size of the vortex flow are related to the flow speed of the fluid, the parameter of the fluid flowing through the measuring tube can be calculated by measuring the frequency of the vortex flow generated by the fluid after flowing through the blocking block, and the related parameter of the total fluid can be calculated by the processor according to the ratio of the cross sections between the measuring tube and the outer tube.

The measuring tube comprises an impeller structure, the sensor is a rotating speed measuring sensor, and the impeller is connected with the sensor. The fluid can drive the impeller rotation behind the survey buret through flowing through, collects impeller rotation parameter through the sensor and gives the treater with the signal transmission, and the treater can obtain the arrangement fluid parameter after calculating the parameter of the buret fluid of flowing through.

Compared with the prior art, the invention has the following advantages and prominent effects:

the invention has the advantages that the measuring tube is arranged in the outer tube to divide the total flow, partial parameters of the fluid can be measured through the measuring tube, and the parameters are scaled, so that the combined flow is reflected, and the measuring precision same as that of a small conventional flow meter is provided. This structure is through optimizing flowmeter inner structure, do not exert an influence to the pressure differential of total flow during the measurement, can promote measurement accuracy, satisfy the flow measurement requirement of heavy-calibre pipeline, this structure can satisfy different measurement demands simultaneously, survey buret inner structure to different measurement parameter changes, measured parameter type includes and is not limited to the velocity of flow, density, quality etc. different measurement parameters can be realized by installing different sensors in surveying the buret, the problem of current flowmeter to the not high unable accurate measurement of heavy-calibre fluid measurement accuracy has been solved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the flowmeter using the principle of a Coriolis flowmeter

FIG. 2 is a side view of the flowmeter using the principle of the Coriolis flowmeter

FIG. 3 is a schematic view of the flowmeter using the ultrasonic principle to perform measurement

FIG. 4 is a schematic diagram of the flowmeter using the principle of differential pressure

In the figure: 1. an outer tube, 2, a fluid inlet; 3. a fluid outlet; 4. a housing; 5. a measurement tube; 6. a processor; 7. a flange plate; 8. a rib plate; 9. an actuator; 10. an ultrasonic wave transmitting and receiving device; 11. a partition plate; 12. a through hole; 13. sensor with a sensor element

Detailed Description

[ example 1 ]

By shown in fig. 1, 2, a liquid flowmeter, liquid flowmeter include the diameter with survey the measuring pipe 5 the same outer tube 1 of pipeline diameter, fluid entry 2, fluid outlet 3, casing 4, a plurality of fix 1 inside survey buret 5 of outer tube, be used for calculating out relevant parameter's treater 6 according to surveying buret 5 collection data, survey buret 5 length and outer tube 1 the same, survey buret 5 and outer tube 1 extension degree direction parallel and unanimous in the fluid flow direction, survey buret 5 quantity and be one, be located outer tube 1 center, the flowmeter includes floor 8, it is fixed through floor 8 between 5 lateral walls of survey buret and the outer tube 1 inside wall.

The measuring tube 5 divides the fluid from the outside, a part of which flows through the measuring tube 5 and the remaining part of which flows through the outer tube 1, the flow meter comprising an actuator 9 for vibrating the measuring tube 5, which actuator causes the flow tube to vibrate when liquid flows through the measuring tube 5, each measuring tube 5 being provided with a sensor 13 for measuring a parameter of the fluid, the sensor 13 being an amplitude sensor 13. The sensor 13 is connected with the processor 6, the processor 6 is installed in the shell 4, the shell 4 is fixedly connected with the outer side wall of the outer pipe 1, and the flange plates 7 connected with the fluid pipe are arranged at two ends of the outer pipe 1.

During the operation of the flowmeter, partial parameters of the fluid can be measured through the measuring pipe 5, and the parameters are scaled so as to reflect the combined flow rate, thereby providing the same measuring precision as that of a small conventional flowmeter. When fluid flows into the flowmeter, the fluid is divided into a plurality of parts, the fluid flows into the measuring pipe 5 and the outer pipe 1 from the inside of the measuring pipe 5, the fluid is merged after flowing out of the flowmeter, the total flow Q of the fluid is divided into Q1 and Q2 through the flowmeter, the flow passing through the measuring pipe 5 is Q1, the flow passing through the outer pipe 1 and the measuring pipe 5 is Q2, under the condition that the cross section of the measuring pipe 5 is known, the ratio of the cross sections passing through Q1 and Q2 can be clearly known, the total value of Q can be calculated according to the ratio of the cross sections when the Q1 is measured, because the ribbed plates 8 and the measuring pipe 5 can both use thin-wall materials, the influence on the total flow cannot be generated, the measuring precision can be improved, and the flow measuring requirement of a large-caliber pipeline is met.

Because the measuring tube 5 can use the structure of thin wall tube, etc., the flow rate and pressure of the fluid will not be affected, thereby ensuring the measuring accuracy, the sensor 13 in the measuring tube 5 can measure the fluid parameters flowing into the sensor 13, including but not limited to flow rate, density, quality, etc., different measuring parameters can be realized by installing different sensors 13 in the measuring tube 5, the sensor 13 in the measuring tube 5 is connected with the processor 6, the processor 6 can perform the accounting according to the collected data, thereby obtaining the whole fluid parameters flowing through the flowmeter. The structure can measure the large-caliber fluid parameters under the condition of not influencing the fluid parameters, and improves the measurement precision.

After the brake makes measuring pipe 5 vibrate, the vibration amplitude can also be different because of the difference of fluid flow rate, sensor 13 can measure the parameter of flow through measuring pipe 5 through detecting the vibration amplitude to transmit for treater 6, treater 6 can obtain the arrangement fluid parameter after calculating the parameter of flow through measuring pipe 5.

[ example 2 ]

This embodiment is the same with embodiment 1 structure, and the difference lies in, above-mentioned survey 5 quantity of burets and be 2, and the outside diameter of surveying 5 burets equals the inner radius of outer tube 1, survey 5 lateral walls of buret and 1 inner wall of outer tube and link firmly.

In order to improve the measurement accuracy, a plurality of measuring tubes 5 can be arranged in the outer tube 1, the flow flows through different measuring tubes 5 and gaps between the outer tube 1 and the measuring tubes 5, corresponding flow data are respectively measured in the measuring tubes 5, relevant parameters are calculated through the processor 6, and measuring sensors 13 with different structures can be adopted as required for the measuring parameters.

[ example 3 ]

As shown in fig. 3, this embodiment has the same structure as that of embodiment 1, except that the measuring pipe 5 includes two ultrasonic transmission/reception devices 10 on the upper side wall for measuring the flow velocity of the fluid, the ultrasonic transmission/reception devices 10 are disposed opposite to each other along the flow direction of the fluid for mutually receiving the emitted ultrasonic waves, and the sensor 13 is an ultrasonic sensor 13. The measuring pipe 5 comprises an ultrasonic transmission and receiving device 10 for measuring the flow velocity of the fluid, the ultrasonic transmission and receiving device 10 is arranged along the flow direction of the fluid, and the sensor 13 is an ultrasonic sensor 13.

Because the propagation speed of ultrasonic waves in the fluid is related to the running speed of the fluid, the ultrasonic wave transmitting and receiving device 10 is arranged along the flowing direction of the fluid, the forward ultrasonic wave transmission time and the backward ultrasonic wave transmission time generate a difference value, the sensor 13 can transmit the difference value signal to the processor 6, and the processor 6 can obtain the parameters of the finished fluid after calculating the parameters of the fluid flowing through the measuring tube 5.

[ example 4 ]

As shown in fig. 4, this embodiment has the same structure as embodiment 1, except that the measuring tube 5 has a partition 11 therein, the partition 11 has a through hole 12, and the sensors 13 are pressure sensors 13 respectively disposed on both sides of the partition 11.

A partition plate 11 with a through hole 12 is arranged in the measuring pipe 5, pressure difference can be generated on two sides of the partition plate 11 after fluid flows through the through hole 12, the pressure difference generated when the flow rate of the fluid is higher is larger, the pressure difference change on two sides of the partition plate 11 is measured through a sensor 13, signals are transmitted to the processor 6, and the processor 6 can obtain the parameters of the finished fluid after calculating the parameters of the fluid flowing through the measuring pipe 5.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. A liquid flow meter is characterized by comprising an outer pipe (1) with the same diameter as a measured pipe (5), a fluid inlet (2), a fluid outlet (3), a shell (4), a plurality of measuring pipes (5) fixed inside the outer pipe (1), and a processor (6) used for calculating related parameters according to data collected by the measuring pipes (5), wherein the length of the measuring pipes (5) is the same as that of the outer pipe (1), the measuring pipes (5) are parallel to the extension direction of the outer pipe (1) and consistent with the flowing direction of fluid, the measuring pipes (5) divide the fluid from the outside, one part of the fluid flows through the measuring pipes (5), the other part of the fluid flows through the outer pipe (1), each measuring pipe (5) is provided with a sensor (13) for measuring the fluid parameters, the sensor (13) is connected with the processor (6), and the processor (6) is installed in the shell (4), the shell (4) is fixedly connected with the outer side wall of the outer pipe (1), and the two ends of the outer pipe (1) are provided with flange plates (7) connected with the fluid pipe.

2. A liquid flow meter according to claim 1, characterized in that the measuring tube (5) is 1 in number and centrally located inside the outer tube (1), and that the flow meter comprises ribs (8), and that the outer side wall of the measuring tube (5) is fixed to the inner side wall of the outer tube (1) by the ribs (8).

3. A liquid flow meter according to claim 1, characterized in that the number of said measuring tubes (5) is 2 and more than 2, said measuring tubes (5) being adjacent and at least a part of the outer surface of each measuring tube (5) being in contact with each other.

4. A liquid flow meter according to claim 3, characterized in that the number of the measuring tubes (5) is 2, the outer diameter of the measuring tubes (5) is equal to the inner radius of the outer tube (1), and the side walls of the measuring tubes (5) are fixedly connected to the inner wall of the outer tube (1).

5. A liquid flow meter according to any of claims 1-4, characterized in that the flow meter comprises an actuator (9) for vibrating the measuring tube (5), and that the sensor (13) is an amplitude sensor (13).

6. A liquid flow meter according to any of claims 1-4, characterized in that the measuring tube (5) comprises two ultrasonic transmission and reception means (10) on its upper side wall for measuring the flow velocity of the liquid, said ultrasonic transmission and reception means (10) being arranged opposite each other along the flow direction of the liquid for mutually receiving the emitted ultrasonic waves, and said sensors (13) being ultrasonic sensors (13).

7. A liquid flow meter as claimed in any one of claims 1-4, characterized in that the measuring tube (5) has a partition (11) therein, the partition (11) having through-holes (12) therein, and that the sensors (13) are pressure sensors (13) arranged on either side of the partition (11).

8. A liquid flow meter according to any of claims 1-4, characterized in that the flow meter comprises an electrical stage arranged opposite the side wall of the measuring tube (5), a magnet coil connected to the electrical stage, a coil driver for driving the measuring tube (5) via the electrical stage, the magnet coil and the coil driver forming a closed circuit therebetween, and that the sensor (13) is a voltage sensor (13).

9. A liquid flow meter according to any of claims 1-4, characterised in that the measuring tube (5) is provided with a blocking piece inside, the blocking piece is a triangular prism, the sensor (13) is located downstream of the blocking piece, and the sensor (13) is a vortex street sensor (13).

10. A liquid flow meter according to any of claims 1-4, characterised in that the measuring tube (5) comprises an impeller structure, the sensor (13) being a rotational speed measuring sensor (13), the impeller being connected to the sensor (13).