CN110672166A - Multi-point measurement Pitotbar flowmeter - Google Patents
Multi-point measurement Pitotbar flowmeter Download PDFInfo
- Publication number
- CN110672166A CN110672166A CN201911110064.6A CN201911110064A CN110672166A CN 110672166 A CN110672166 A CN 110672166A CN 201911110064 A CN201911110064 A CN 201911110064A CN 110672166 A CN110672166 A CN 110672166A
- Authority
- CN
- China
- Prior art keywords
- pressure
- flow
- pitot
- flow sensor
- differential pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 27
- 230000003068 static effect Effects 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 abstract description 13
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/50—Correcting or compensating means
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a multi-point measurement Pitot flowmeter, which comprises a plurality of Pitot flow sensors, a plurality of differential pressure transmitters and a flow integrating instrument, wherein each Pitot flow sensor is provided with a pressure taking head and also comprises a mounting short pipe; the signal output end of each Pitotbar flow sensor is connected with the signal input end of the corresponding differential pressure transmitter, and the signal output ends of the differential pressure transmitters are respectively connected with the signal input ends corresponding to the flow totalizer. The invention is equivalent to using a plurality of different Pitot-bar flow meters to measure the fluid flow in the same pipeline, and the measurement result is relatively accurate.
Description
Technical Field
The invention relates to a Pitot flowmeter, in particular to a multi-point measurement Pitot flowmeter.
Background
The Pitot flowmeter mainly comprises a Pitot flow sensor, a differential pressure transmitter and a flow integrating instrument, when in use, the Pitot flow sensor is vertically inserted into a pipeline from the side wall of the pipeline, a full pressure hole of a pressure head of the Pitot flow sensor is opposite to the incoming flow direction of the fluid, a static pressure hole is opposite to the outgoing flow direction of the fluid, when the fluid flows in the pipeline, a full pressure interface and a static pressure interface at the upper end of a pressure guide pipe of the Pitot flow sensor respectively output full pressure and static pressure signals of the fluid flowing in the pipeline, the differential pressure transmitter converts the full pressure and static pressure signals of the fluid in the pipeline transmitted by the Pitot flow sensor into standard current signals of 4 ~ 20mA and transmits the standard current signals to the flow integrating instrument, and the flow of the fluid in the pipeline can be finally calculated according to the full pressure and the static pressure of the fluid in the flow integrating instrument according to the fluid mechanics principle.
When the pitot flowmeter in the prior art measures the fluid flow in the pipeline, the measurement accuracy of the pitot flow sensor determines the measurement accuracy of the fluid flow in the pipeline finally, and if the errors of the full pressure signal and the static pressure signal transmitted by the sensor are large, the final measurement result error is large. The full pressure or static pressure signal is inaccurate due to a plurality of reasons, for example, when scaling, excessive dust accumulation and crystallization occur on the inner wall of the hole of the full pressure or static pressure hole, the output full pressure or static pressure signal changes greatly, so that the error of the measurement result is large.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-point measurement Pitotbar flowmeter which can obtain relatively accurate measurement results when measuring the flow rate of fluid in a pipeline.
In order to solve the technical problem, the invention provides a multi-point measurement Pitot flowmeter, which comprises a Pitot flow sensor, a differential pressure transmitter and a flow integrating instrument, wherein the Pitot flow sensor is provided with a pressure taking head, a full pressure channel and a static pressure channel are arranged in the pressure taking head, the axes of the full pressure channel and the static pressure channel are parallel to each other and are positioned at two opposite sides in the pressure taking head, the two opposite sides at the lower part of the pressure taking head are provided with a full pressure hole and a static pressure hole which are respectively communicated with the full pressure channel and the static pressure channel, the signal output end of the Pitot flow sensor is connected with the signal input end of the differential pressure transmitter, the signal output end of the differential pressure transmitter is connected with the signal input end of the flow integrating instrument, the number of the Pitot flow sensors is multiple, correspondingly, the number of the differential pressure transmitters is also multiple, the multi-point measurement Pitot flow meter also comprises installation short pipes, the multiple, the pressure taking head of each Pitot flow sensor is positioned in the installation short pipe, and the distances from a full pressure hole at the lower part of the pressure taking head of each Pitot flow sensor to the axis of the installation short pipe are different; the signal output end of each Pitotbar flow sensor is connected with the signal input end of the corresponding differential pressure transmitter, and the signal output ends of the differential pressure transmitters are respectively connected with the signal input ends corresponding to the flow totalizer.
As an improvement of the invention, the axes of the full pressure channels in the pressure taking heads of the plurality of Pitot flow sensors are positioned in the same plane, and the axes of the static pressure channels are positioned in another plane.
The multipoint measurement Pitot-bar flowmeter with the structure is used, the installation short pipe is connected with the matched measured pipeline, the method is equivalent to using a plurality of different Pitot-bar flowmeters to measure the fluid flow in the same pipeline, the measurement result is the average value of all the measurement results, the measurement result is relatively accurate, and the measurement precision is higher; when a group of differential pressure signals output by a Pitotbar flow sensor are transmitted to the flow integrating instrument through the corresponding differential pressure transmitter, and the difference value between the integrated flow value of the flow integrating instrument and the average value of all measurement results exceeds a certain range, the integrating instrument can output the average value of other measurement results, and still obtain relatively accurate measurement results. The Pitotbar flow sensor with large output measurement result errors can be maintained or replaced during maintenance of the flowmeter.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the structural components of a multi-point measurement Pitotbar flowmeter of the present invention.
Fig. 2 is an enlarged schematic view of the structure at I in fig. 1.
Fig. 3 is a schematic sectional view taken along line a-a in fig. 2.
Detailed Description
Referring to fig. 1-3, the invention discloses a multi-point measurement Pitot flowmeter, which comprises a Pitot flow sensor 10, a differential pressure transmitter 20 and a flow totalizer 30, wherein the Pitot flow sensor is provided with a pressure taking head 11, a full pressure channel 12 and a static pressure channel 13 which are parallel to each other in axis and are positioned at two opposite sides in the pressure taking head are arranged in the pressure taking head 11, two opposite sides at the lower part of the pressure taking head 11 are provided with a full pressure hole 14 and a static pressure hole 15 which are respectively communicated with the full pressure channel 12 and the static pressure channel 13, the signal output end of the Pitot flow sensor 10 is connected with the signal input end of the differential pressure transmitter 20, the signal output end of the differential pressure transmitter 20 is connected with the signal input end of the flow totalizer 30, the number of the Pitot flow sensors 10 is multiple, correspondingly, the number of the differential pressure transmitters 20 is multiple, the multipoint measurement Pitot flow meter also comprises installation short pipes 1, the multiple Pitot flow sensors 10 are vertically and uniformly distributed along the circumferential direction of the installation, the pressure taking head 11 of each Pitot flow sensor is positioned in the installation short pipe 1, the distances from the full pressure hole 14 at the lower part of the pressure taking head of each Pitot flow sensor to the axis of the installation short pipe 1 are different, and correspondingly, the distances from the static pressure hole 15 at the lower part of the pressure taking head of each Pitot flow sensor to the axis of the installation short pipe 1 are also different; the signal output end of each Pitot-bar flow sensor 10 is connected with the signal input end of the corresponding differential pressure transmitter 20, and the signal output ends of the differential pressure transmitters 20 are respectively connected with the signal input ends corresponding to the flow totalizer 30. Preferably, the axes of the full pressure channels 12 in the tapping head 11 of the plurality of pitot flow sensors 10 are in the same plane, and the axes of the static pressure channels 13 are in another plane, and since the axes of the full pressure channels 12 and the static pressure channels 13 in the tapping head of each pitot flow sensor 10 are parallel to each other, the two planes are also parallel to each other.
The differential pressure between each positive pressure channel and the negative pressure channel is different in proportion to the pipeline due to the fact that the insertion depth of the inserted pipeline is different in proportion to the pipeline, when a medium flows, the differential pressure between each positive pressure channel and the negative pressure channel has a certain proportion due to the fact that the central flow velocity of the pipeline is different from the edge flow velocity of the pipeline, when scaling in the pipeline is the reduction of the inner diameter of the pipeline, the proportion of the sensor inserted into the pipeline changes, the differential pressure between each positive pressure channel and the negative pressure channel has a certain proportion to change, and the integrator calculates scaling of the pipeline by recording the relation between the proportional relation of the differential pressure and the scaling condition of. Thereby calculating the flow area of the medium and automatically correcting.
Claims (2)
1. The utility model provides a multi-point measurement Pitot flowmeter, includes Pitot flow sensor (10), differential pressure transmitter (20) and flow totalizer (30), Pitot flow sensor has pressure of getting head (11), gets and has axis parallel to each other and be located full pressure passageway (12) and static pressure passageway (13) of getting the pressure head relative both sides in pressure head (11), gets relative both sides of pressure head (11) lower part and has full pressure hole (14) and static pressure hole (15) that are linked together with full pressure passageway (12) and static pressure passageway (13) respectively, the signal output part of Pitot flow sensor (10) links to each other with the signal input part of differential pressure transmitter (20), and the signal output part of differential pressure transmitter (20) links to each other with the signal input part of flow totalizer (30), its characterized in that: the device comprises a plurality of Pitotbar flow sensors (10), a plurality of differential pressure transmitters (20) and an installation short pipe (1), wherein the plurality of Pitotbar flow sensors (10) are uniformly distributed and vertically fixed on the installation short pipe at intervals along the circumferential direction of the installation short pipe (1), a pressure taking head (11) of each Pitotbar flow sensor is positioned in the installation short pipe (1), and the distances from a full pressure hole (14) at the lower part of the pressure taking head of each Pitotbar flow sensor to the axis of the installation short pipe (1) are different; the signal output end of each Pitotbar flow sensor (10) is connected with the signal input end of the corresponding differential pressure transmitter (20), and the signal output ends of the differential pressure transmitters (20) are respectively connected with the signal input ends corresponding to the flow totalizer (30).
2. The multi-point measurement pitot-bar flow meter of claim 1, wherein: the axes of the full pressure channels (12) in the pressure taking heads (11) of the Pitot-bar flow sensors (10) are positioned in the same plane, and the axes of the static pressure channels (13) are positioned in another plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110064.6A CN110672166A (en) | 2019-11-14 | 2019-11-14 | Multi-point measurement Pitotbar flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110064.6A CN110672166A (en) | 2019-11-14 | 2019-11-14 | Multi-point measurement Pitotbar flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110672166A true CN110672166A (en) | 2020-01-10 |
Family
ID=69087260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911110064.6A Pending CN110672166A (en) | 2019-11-14 | 2019-11-14 | Multi-point measurement Pitotbar flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110672166A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207798A (en) * | 2020-02-17 | 2020-05-29 | 杭州老板电器股份有限公司 | Air volume testing device and testing method thereof |
| CN112302597A (en) * | 2020-11-04 | 2021-02-02 | 海南毕托巴科技研究院有限公司 | Wet steam metering device |
| WO2023151565A1 (en) * | 2022-02-09 | 2023-08-17 | 付成 | Modular flow measurement method and apparatus, and application |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB724276A (en) * | 1951-09-28 | 1955-02-16 | Sturtevant Eng Co Ltd | Improvements in apparatus for measuring the flow of fluid in a duct |
| US5736651A (en) * | 1996-05-23 | 1998-04-07 | Bowers; James R. | High temperature gas flow sensing element |
| CN201387343Y (en) * | 2009-03-02 | 2010-01-20 | 苏州市华宇净化设备有限公司 | Sampling device for fluid flow rate |
| CN104568027A (en) * | 2015-02-05 | 2015-04-29 | 辽宁毕托巴科技有限公司 | Pitotbar gas flow measuring device |
| CN105387894A (en) * | 2015-10-16 | 2016-03-09 | 辽宁毕托巴科技有限公司 | Bitobar flowmeter |
| CN205561940U (en) * | 2016-04-22 | 2016-09-07 | 南京友智科技有限公司 | Circular pipeline total cross -section flow measuring device |
| CN205909881U (en) * | 2016-06-28 | 2017-01-25 | 苏州苏信环境科技有限公司 | Amount of wind collection system |
| CN109540229A (en) * | 2018-12-13 | 2019-03-29 | 上海权宥环保科技有限公司 | Phase unsteady flow saturated steam flowing meter |
| CN210400480U (en) * | 2019-11-14 | 2020-04-24 | 上海权宥环保科技有限公司 | Multi-point measurement Pitotbar flowmeter |
-
2019
- 2019-11-14 CN CN201911110064.6A patent/CN110672166A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB724276A (en) * | 1951-09-28 | 1955-02-16 | Sturtevant Eng Co Ltd | Improvements in apparatus for measuring the flow of fluid in a duct |
| US5736651A (en) * | 1996-05-23 | 1998-04-07 | Bowers; James R. | High temperature gas flow sensing element |
| CN201387343Y (en) * | 2009-03-02 | 2010-01-20 | 苏州市华宇净化设备有限公司 | Sampling device for fluid flow rate |
| CN104568027A (en) * | 2015-02-05 | 2015-04-29 | 辽宁毕托巴科技有限公司 | Pitotbar gas flow measuring device |
| CN105387894A (en) * | 2015-10-16 | 2016-03-09 | 辽宁毕托巴科技有限公司 | Bitobar flowmeter |
| CN205561940U (en) * | 2016-04-22 | 2016-09-07 | 南京友智科技有限公司 | Circular pipeline total cross -section flow measuring device |
| CN205909881U (en) * | 2016-06-28 | 2017-01-25 | 苏州苏信环境科技有限公司 | Amount of wind collection system |
| CN109540229A (en) * | 2018-12-13 | 2019-03-29 | 上海权宥环保科技有限公司 | Phase unsteady flow saturated steam flowing meter |
| CN210400480U (en) * | 2019-11-14 | 2020-04-24 | 上海权宥环保科技有限公司 | Multi-point measurement Pitotbar flowmeter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207798A (en) * | 2020-02-17 | 2020-05-29 | 杭州老板电器股份有限公司 | Air volume testing device and testing method thereof |
| CN112302597A (en) * | 2020-11-04 | 2021-02-02 | 海南毕托巴科技研究院有限公司 | Wet steam metering device |
| WO2023151565A1 (en) * | 2022-02-09 | 2023-08-17 | 付成 | Modular flow measurement method and apparatus, and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106768103B (en) | A kind of method of the automatic prover time deviation of ultrasonic flowmeter | |
| CN110672166A (en) | Multi-point measurement Pitotbar flowmeter | |
| CN105403265A (en) | Automatic zero drift-correction ultrasound water meter and correction method | |
| EP3132233B1 (en) | Flow meter | |
| CN210321842U (en) | Automatic compensation type vortex shedding flowmeter capable of being used for Internet of things | |
| CN1936506A (en) | Small section branch-flow measuring method for large-diameter gas flow and apparatus thereof | |
| CN110631648A (en) | Sensor combined Pitotbar flowmeter | |
| CN210400480U (en) | Multi-point measurement Pitotbar flowmeter | |
| CN104165664B (en) | Pitot bar integrated mass flow meter | |
| CN210400479U (en) | Sensor combined Pitotbar flowmeter | |
| CN201034644Y (en) | Annular pressure sampling type V awl flow rate sensor | |
| CN110686736A (en) | Pressure taking head of Pitotbar flow sensor | |
| CN210400481U (en) | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter | |
| CN210533449U (en) | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter | |
| CN101251397A (en) | By-pass type pipeline flowmeter | |
| CN109341790B (en) | Pitotbar flow sensor for measuring water not full of pipe | |
| CN210400484U (en) | Pressure taking head of Pitotbar flow sensor | |
| CN210400478U (en) | Multi-point measurement Pitotbar flow sensor | |
| CN211668585U (en) | Ultrasonic water meter capable of realizing zero dynamic real-time calibration | |
| CN217276326U (en) | Six-communication flow meter | |
| CN202018309U (en) | L-shaped Pitot tube flow meter | |
| CN204902902U (en) | Low velocity of flow to high flow rate wide range clings to flowmeter than pitot | |
| CN209878032U (en) | Flowmeter for multi-point measurement of large-diameter pipeline | |
| CN110686735A (en) | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter | |
| CN110617857A (en) | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210108 Address after: 112600 No. 265, Ling Dong Street, Tieling Economic Development Zone, Tieling, Liaoning Applicant after: Liaoning pitotbar Polytron Technologies Inc. Address before: 201600 building 24, 506 South Ring Road, Songjiang District, Shanghai Applicant before: SHANGHAI QUANYOU ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |