CN210400479U - Sensor combined Pitotbar flowmeter - Google Patents
Sensor combined Pitotbar flowmeter Download PDFInfo
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- CN210400479U CN210400479U CN201921960674.0U CN201921960674U CN210400479U CN 210400479 U CN210400479 U CN 210400479U CN 201921960674 U CN201921960674 U CN 201921960674U CN 210400479 U CN210400479 U CN 210400479U
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- 238000007789 sealing Methods 0.000 claims abstract description 5
- 230000003068 static effect Effects 0.000 claims description 26
- 238000009434 installation Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 15
- 238000005259 measurement Methods 0.000 abstract description 13
- 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
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model discloses a sensor combined Pitot flowmeter, which comprises a plurality of Pitot flow sensors, a plurality of differential pressure transmitters and a flow integrating instrument, wherein the Pitot flow sensors are provided with pressure guide pipes and connected pressure taking heads, the signal output end of each Pitot flow sensor is connected with the signal input end of the corresponding differential pressure transmitter, the signal output ends of the differential pressure transmitters are respectively connected with the corresponding signal input ends of the flow integrating instrument, and the sensor combined Pitot flowmeter also comprises a sensor mounting seat, the sensor mounting seat is provided with an upper connecting flange and a lower connecting flange which are fixedly connected, the bottom of the lower connecting flange is connected with a mounting sleeve, a pressure guide pipe of each Pitotbar flow sensor penetrates through the upper connecting flange in a sealing manner, a pressure taking head connected with the pressure guide pipe is positioned below the mounting sleeve, and the full pressure holes at the lower part of the pressure taking head of the Pitotbar flow sensor are arranged gradually along the vertical direction. Use the utility model discloses can obtain relatively accurate measuring result during the fluid flow in the measurement pipeline.
Description
Technical Field
The utility model relates to a pitot flowmeter, specifically speaking relate to a sensor combination formula 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 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 full pressure and the static pressure of the fluid flowing in the pipeline and the fluid mechanics principle.
When the pitot flowmeter in the prior art measures the fluid flow in a 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 and static pressure signals transmitted by the pressure guide pipe are large, the error of the final measurement result is large. The full pressure or static pressure signal is inaccurate, for example, when scaling, excessive dust accumulation and crystallization occur on the inner wall of a hole in the full pressure or static pressure hole of a pressure sampling head connected with a pressure guiding pipe, the output full pressure or static pressure signal changes greatly, so that the error of the measuring result is large.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a sensor combination formula 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 sensor combination formula Pitot flowmeter, including Pitot flow sensor, differential pressure transmitter and flow totalizer, Pitot flow sensor has the pressure pipe and the pressure head of getting that links to each other, gets and has axis to be parallel to each other and lie in getting the pressure head in full pressure passageway and the static pressure passageway of relative both sides, get relative both sides of pressure head lower part and have full pressure hole and the static pressure hole that is linked together with full pressure passageway and static pressure passageway respectively, Pitot flow sensor's signal output part links to each other with differential pressure transmitter's signal input part, and differential pressure transmitter's signal output part links to each other with the signal input part of flow totalizer, still includes the sensor mount pad, and this sensor mount pad has fixed continuous upper and lower flange, and even there is the installation sleeve bottom of lower flange, the pressure pipe sealed pass upper flange, The pressure taking heads connected with the pressure guide pipes are positioned below the mounting sleeve, the number of the Pitot-bar flow sensors is multiple, correspondingly, the number of the differential pressure transmitters is also multiple, the pressure guide pipes of the Pitot-bar flow sensors penetrate through the upper connecting flange in a sealing manner, the pressure taking heads connected with the pressure guide pipes of the Pitot-bar flow sensors are positioned below the mounting sleeve, and the full pressure holes at the lower parts of the pressure taking heads of the Pitot-bar flow sensors are arranged gradually along the vertical direction; 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.
Adopt the sensor combination formula Pitot flowmeter of above-mentioned structure, the installation sleeve that passes through sensor mount pad bottom during the use cooperatees with the measurand pipeline the utility model provides a Pitot flow sensor adorns on the measurand pipeline, and every Pitot flow sensor pressure pipe bottom gets the pressure head and all is located the measurand pipeline. Because the full pressure holes at the lower part of the pressure taking head of the Pitot flow sensors are arranged gradually along the vertical direction, the method is equivalent to measuring the fluid flow in the same pipeline by using a plurality of different Pitot flowmeters, 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 utility model discloses the great certain Pitotbar 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.
Fig. 1 is a schematic view of a main view partial cross-sectional structure of a sensor combined type Pitotbar flowmeter of the present invention.
Fig. 2 is a side view partially in section of fig. 1.
Fig. 3 is an enlarged schematic view of the structure at I in fig. 1.
Fig. 4 is a schematic sectional view taken along line a-a in fig. 3.
Detailed Description
Referring to fig. 1-4, the utility model relates to a sensor combination type pitot flowmeter, including pitot flow sensor 10, differential pressure transmitter 20 and flow totalizer 30, pitot flow sensor has pressure pipe 11 and pressure taking head 12 connected with the pressure pipe, pressure taking head has full pressure channel 13 and static pressure channel 14 whose axes are parallel to each other and located opposite sides in the pressure taking head, the opposite sides of the lower part of pressure taking head 12 have full pressure hole 15 and static pressure hole 16 communicated with full pressure channel 13 and static pressure channel 14 respectively, the signal output end of pitot flow sensor 10 is connected with the signal input end of differential pressure transmitter 20, the signal output end of differential pressure transmitter 20 is connected with the signal input end of flow totalizer 30, and also includes sensor mount 40, which has upper and lower connecting flanges 41, 42 fixedly connected, the bottom of lower connecting flange 42 is connected with mounting sleeve 43, the pressure guide pipes 11 penetrate through the upper connecting flange 41 in a sealing mode, the pressure taking heads 12 connected with the pressure guide pipes are located below the mounting sleeve 43, the number of the Pitot-bar flow sensors 10 is multiple, correspondingly, the number of the differential pressure transmitters 20 is also multiple, the pressure guide pipes 11 of the Pitot-bar flow sensors 10 penetrate through the upper connecting flange 41 in a sealing mode, the pressure taking heads 12 connected with the pressure guide pipes of the Pitot-bar flow sensors 10 are located below the mounting sleeve 43, the full-pressure holes 15 at the lower portions of the pressure taking heads of the Pitot-bar flow sensors are arranged gradually in the vertical direction, the static pressure holes 16 are arranged gradually in the vertical direction correspondingly, namely the full-pressure holes 15 are arranged in the vertical direction, the distances between the adjacent full-pressure holes are equal, and the static pressure holes 16 are arranged in the vertical direction, and the distances between the adjacent static pressure holes are equal; 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. The axes of the full pressure channel 13 in the pressure taking head 12 of the plurality of Pitot flow sensors 10 are positioned in the same plane, the axis of the static pressure channel 14 is positioned in another plane, and the axes of the full pressure channel 13 and the static pressure channel 14 in the pressure taking head 12 of each Pitot flow sensor 10 are parallel to each other, so that the two planes are also parallel to each other.
The utility model discloses a structural condition when sensor combination formula Pitot flowmeter adorns on measurand pipeline 1 is shown simultaneously in FIG. 1, and FIG. 1 Pitot flow sensor cooperatees with the installation sleeve 143 of flange bottom under its mount pad and pipeline and adorns on measurand pipeline 1.
The differential pressure between each flowmeter, because of inserting the pipeline in the depth of insertion account for the pipeline proportion different, when the medium flows, because of pipeline central velocity of flow and pipeline edge velocity of flow are different, there is certain proportion in the differential pressure between each positive pressure passageway and the negative pressure passageway, it is that the pipeline internal diameter reduces to scale deposit in the pipeline, insert the change of sensor proportion in the pipeline this moment, the differential pressure between each positive pressure passageway and the negative pressure passageway has certain proportion to change, the relation of differential pressure proportional relation and pipeline scale deposit condition is passed through the record to the integrating instrument, calculate the pipeline scale deposit. Thereby calculating the flow area of the medium and automatically correcting.
Claims (2)
1. The sensor combined Pitot flowmeter comprises a Pitot flow sensor (10), a differential pressure transmitter (20) and a flow integrating instrument (30), wherein the Pitot flow sensor is provided with a pressure guide pipe (11) and a pressure taking head (12) which is connected with the pressure guide pipe, a full pressure channel (13) and a static pressure channel (14) are arranged in the pressure taking head, the axes of the full pressure channel (13) and the static pressure channel (14) are parallel to each other and are positioned at two opposite sides in the pressure taking head, the two opposite sides of the lower part of the pressure taking head (12) are provided with a full pressure hole (15) and a static pressure hole (16) which are respectively communicated with the full pressure channel (13) and the static pressure channel (14), 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 integrating instrument (30), lower flange (41, 42), the bottom of lower flange (42) even has installation sleeve (43), pressure pipe (11) sealed pass upper flange (41), and with the pressure pipe link to each other get pressure head (12) be located the below of installation sleeve (43), its characterized in that: the pressure measuring device is characterized in that the number of the Pittobar flow sensors (10) is multiple, correspondingly, the number of the differential pressure transmitters (20) is also multiple, pressure guide pipes (11) of the Pittobar flow sensors (10) penetrate through the upper connecting flange (41) in a sealing mode, pressure measuring heads (12) connected with the pressure guide pipes of the Pittobar flow sensors (10) are located below the mounting sleeve (43), and full pressure holes (15) in the lower portions of the pressure measuring heads of the Pittobar flow sensors are arranged gradually in the vertical direction; 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 sensor combination pitot flowmeter of claim 1, characterized by: the axes of the full pressure channels (13) in the pressure taking heads (12) of the Pitotbar flow sensors (10) are positioned in the same plane, and the axes of the static pressure channels (14) are positioned in another plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921960674.0U CN210400479U (en) | 2019-11-14 | 2019-11-14 | Sensor combined Pitotbar flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921960674.0U CN210400479U (en) | 2019-11-14 | 2019-11-14 | Sensor combined Pitotbar flowmeter |
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| CN210400479U true CN210400479U (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631648A (en) * | 2019-11-14 | 2019-12-31 | 上海权宥环保科技有限公司 | Sensor combined Pitotbar flowmeter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631648A (en) * | 2019-11-14 | 2019-12-31 | 上海权宥环保科技有限公司 | Sensor combined Pitotbar flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210125 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. |
|
| CP03 | Change of name, title or address | ||
| 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. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Sensor Combination 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 |