CN210400480U - Multi-point measurement Pitotbar flowmeter - Google Patents
Multi-point measurement Pitotbar flowmeter Download PDFInfo
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- CN210400480U CN210400480U CN201921960830.3U CN201921960830U CN210400480U CN 210400480 U CN210400480 U CN 210400480U CN 201921960830 U CN201921960830 U CN 201921960830U CN 210400480 U CN210400480 U CN 210400480U
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- 238000005259 measurement Methods 0.000 title claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 21
- 230000003068 static effect Effects 0.000 claims description 24
- 239000012530 fluid Substances 0.000 abstract description 15
- 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
- 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
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses a multipoint measurement Pitot flowmeter, including a plurality of Pitot flow sensor, a plurality of differential pressure transmitter and flow totalizer, Pitot flow sensor has pressure taking head, still including the installation nozzle stub, a plurality of Pitot flow sensor along the circumferencial direction interval equipartition of installation nozzle stub vertically fix on the installation nozzle stub, each Pitot flow sensor's pressure taking head all is located the installation nozzle stub, and each Pitot flow sensor pressure taking head lower part full pressure hole to the distance of installation nozzle stub axis all inequality; 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 utility model discloses use the fluid flow in the same pipeline of Pitotbar flowmeter measurement of a plurality of differences in other words, the measuring result is accurate relatively.
Description
Technical Field
The utility model relates to a Pitot flowmeter, specifically speaking relate to a multiple spot measurement Pitot flowmeter.
Background
At present, the flow measuring devices for measuring the flow of fluid in a pipeline have more types, and the Pitotbar flowmeter has simple structure, convenient installation and relatively high measurement precision and is widely applied to measuring the flow of fluid in the pipeline. When the Pitot-bar flowmeter is used, the Pitot-bar flow sensor is vertically inserted into a pipeline from the side wall of the pipeline, a full pressure hole of a pressure taking head of the Pitot-bar flow sensor faces the incoming flow direction of fluid, a static pressure hole faces 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-bar flow sensor respectively output full pressure and static pressure signals of the fluid flowing in the pipeline, the full pressure and static pressure signals of the fluid in the pipeline transmitted by the Pitot-bar flow sensor are converted into standard current signals of 4-20 mA by the differential pressure transmitter and then transmitted to the flow integrating instrument, and the flow of the fluid in the pipeline can be finally calculated in the flow integrating instrument according to the fluid mechanics principle according to the full pressure and the static pressure of the fluid flowing in the pipeline.
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.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a multipoint measurement Pitotbar flowmeter that can obtain relatively accurate measuring result when measuring the interior fluid flow of pipeline.
In order to solve the technical problem, the utility model relates to 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 installing short pipes are also included, and the multiple Pitot flow sensors are, 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 the improvement of the utility model, the axis of the total pressure channel in the pressure taking head of the plurality of Pitot-bar flow sensors is positioned in the same plane, and the axis of the static pressure channel is positioned in another plane.
The multi-point measurement Pitot flowmeter adopting the structure uses the utility model to connect the installation short pipe with the matched measured pipeline, which is equivalent to using a plurality of different Pitot flowmeters to measure the fluid flow in the same pipeline, and the measurement result takes the average value of all 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 utility model discloses the great Pitot bar flow sensor of well output measurement error can maintain or change during the flowmeter maintenance.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Figure 1 is a schematic view of the structure 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 utility model relates to a multipoint measurement Pitot flowmeter, including Pitot flow sensor 10, differential pressure transmitter 20 and flow totalizer 30, Pitot flow sensor has pressure head 11, has axis parallel to each other and lies in pressure head internal relative both sides's full pressure passageway 12 and static pressure passageway 13 in pressure head 11, and pressure head 11 lower part's relative both sides have respectively with full pressure passageway 12 and static pressure passageway 13 be linked together full pressure hole 14 and static pressure hole 15, Pitot flow sensor 10's signal output part links to each other with differential pressure transmitter 20's signal input part, differential pressure transmitter 20's signal output part links to each other with flow totalizer 30's signal input part, the quantity of Pitot flow sensor 10 is a plurality of, correspondingly differential pressure transmitter 20's quantity also is a plurality of, still including installation nozzle stub 1, a plurality of Pitot flow sensor 10 along the vertical solid dress of installation nozzle stub 1 of circumferencial direction interval equipartition of installation nozzle stub 1 on installation nozzle stub 1 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 |
|---|---|---|---|
| CN201921960830.3U CN210400480U (en) | 2019-11-14 | 2019-11-14 | Multi-point measurement Pitotbar flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921960830.3U CN210400480U (en) | 2019-11-14 | 2019-11-14 | Multi-point measurement Pitotbar flowmeter |
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| Publication Number | Publication Date |
|---|---|
| CN210400480U true CN210400480U (en) | 2020-04-24 |
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| CN201921960830.3U Active CN210400480U (en) | 2019-11-14 | 2019-11-14 | Multi-point measurement Pitotbar flowmeter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672166A (en) * | 2019-11-14 | 2020-01-10 | 上海权宥环保科技有限公司 | Multi-point measurement Pitotbar flowmeter |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672166A (en) * | 2019-11-14 | 2020-01-10 | 上海权宥环保科技有限公司 | Multi-point measurement Pitotbar flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210113 Address after: 112600 No. 265, Ling Dong Street, Tieling Economic Development Zone, Tieling, Liaoning Patentee after: Liaoning pitotbar Polytron Technologies Inc. Address before: 201600 building 24, 506 South Ring Road, Songjiang District, Shanghai Patentee before: SHANGHAI QUANYOU ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 265 Lingdong Street, Tieling Economic Development Zone, Tieling City, Liaoning Province, 112366 Patentee after: Liaoning Bitobar Technology Co.,Ltd. Address before: 112600 No. 265, Ling Dong Street, Tieling Economic Development Zone, Tieling, Liaoning Patentee before: Liaoning pitotbar Polytron Technologies Inc. |
|
| CP03 | Change of name, title or address | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Multipoint Measurement Bitoba Flowmeter Effective date of registration: 20231228 Granted publication date: 20200424 Pledgee: Tieling Branch of Shengjing Bank Co.,Ltd. Pledgor: Liaoning Bitobar Technology Co.,Ltd. Registration number: Y2023210000358 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |