CN109341790B - Pitotbar flow sensor for measuring water not full of pipe - Google Patents
Pitotbar flow sensor for measuring water not full of pipe Download PDFInfo
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- CN109341790B CN109341790B CN201811522429.1A CN201811522429A CN109341790B CN 109341790 B CN109341790 B CN 109341790B CN 201811522429 A CN201811522429 A CN 201811522429A CN 109341790 B CN109341790 B CN 109341790B
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- pressure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 230000003068 static effect Effects 0.000 claims abstract description 70
- 238000009434 installation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 12
- 238000010079 rubber tapping Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 1
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Classifications
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- 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
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/46—Pitot tubes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/08—Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a Pitot-bar flow sensor for measuring water in an underfloor pipe, which comprises a pressure taking head and a full and static pressure guide pipe connected with the pressure taking head, wherein the top ends of the full and static pressure guide pipes are connected with a transmitter connector, the upper section of the pressure taking head is a cylindrical connector, the left and right side surfaces opposite to the lower section of the pressure taking head are provided with full and static pressure holes, the pressure taking head is internally provided with a full and static pressure channel, the left and right side surfaces of the pressure taking head are provided with full and static pressure balance holes, and the full and static pressure balance holes are respectively communicated with; the top of the full static pressure channel and the top of the static pressure channel are respectively communicated with the full static pressure water storage holes and the static pressure water storage holes through the full static pressure diversion channel and the static pressure diversion channel, the full static pressure guide pipe and the static pressure guide pipe are respectively extended into the full static pressure water storage holes and the static pressure water storage holes, and the bottom of the full static pressure guide pipe and the bottom of the static pressure guide pipe are extended to the lower parts of the full static pressure balance holes and the static pressure balance holes. When the water level fluctuation in the pipeline is large, the pressure measuring device has a good pressure measuring effect and cannot generate measuring errors.
Description
Technical Field
The invention relates to a Pitot flow sensor, in particular to a Pitot flow sensor for measuring water which is not full of pipes.
Background
The Pitot flowmeter is a commonly used flowmeter for measuring the fluid flow in a pipeline, mainly comprises a Pitot flow sensor, a differential pressure transmitter and a flow integrating instrument, and is widely applied to the measurement of the fluid flow in the pipeline due to the simple composition and convenient installation of the Pitot flowmeter. The Pitot flow sensor is a pressure taking and transmitting element when the Pitot flowmeter measures the flow of fluid in a pipeline, the structure of the pressure-measuring head mainly comprises a pressure-measuring head and a connected pressure-guiding pipe, wherein the pressure-guiding pipe comprises a full-pressure-guiding pipe and a static-pressure-guiding pipe, the top ends of the full-pressure-guiding pipe and the static-pressure-guiding pipe are connected with a transmitter connector, the transmitter connector is provided with a transmitter full-pressure interface and a transmitter negative-pressure interface, the upper section of the pressure taking head is a cylindrical joint, the left and right side surfaces opposite to the lower section of the pressure taking head are provided with symmetrical left and right inclined surfaces, the left and right inclined surfaces are symmetrically provided with full pressure holes and static pressure holes, a full pressure channel and a static pressure channel which are communicated with the full pressure holes and the static pressure holes are arranged in the pressure taking head, the axes of the full pressure channel and the static pressure channel are parallel to the axis of the pressure taking head and are positioned in the same plane, and a cylindrical joint at the upper section of the pressure taking head is provided with a mounting sleeve which is sleeved outside the pressure guide pipe and is connected with the bottom of the transmitter joint. When the Pitot flowmeter measures the flow of fluid in a pipeline, a Pitot sensor is vertically inserted into the pipeline from top to bottom, a differential pressure transmitter converts a full-pressure signal and a static-pressure signal transmitted by a full-pressure pipe and a static-pressure pipe into corresponding standard current signals and transmits the standard current signals to a flow integrating instrument, and the flow of the fluid in the pipeline can be calculated in the flow integrating instrument according to the fluid full-pressure and the static pressure in the pipeline and the fluid level height in the pipeline.
The Pitot flowmeter with the structure is used for measuring the measurement precision of the fluid flow in the pipeline, which is mainly determined by the measurement precision of the Pitot flow sensor, and when the pipeline is full of fluid medium or the liquid level is above a full pressure hole and a static pressure hole of a pressure tapping head, the pressure tapping effect of the sensor is good, and the measurement precision is high. However, when the liquid level of the fluid medium in the pipeline fluctuates greatly, that is, the liquid level is often below the full pressure hole and the static pressure hole of the pressure tapping head, when the liquid level rises, the gas in the pipeline enters from the full pressure hole and the static pressure hole and transmits the pressure of the gas to the full pressure pipe and the static pressure pipe, so that errors occur in the full pressure and static pressure signals transmitted by the pressure tapping head, and the measurement accuracy of the flowmeter is finally affected.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a Pitotbar flow sensor for measuring water in an incomplete pipe, which can not affect the pressure measuring effect even if the liquid level fluctuation of a fluid medium in a pipeline is large when the flow of the fluid in the pipeline is measured.
In order to solve the technical problem, the Pitot-bar flow sensor for measuring water in an unfilled pipe comprises a pressure taking head and a pressure guide pipe connected with the pressure taking head, wherein the pressure guide pipe comprises a full-pressure guide pipe and a static pressure guide pipe, the top ends of the full-pressure guide pipe and the static pressure guide pipe are connected with a transmitter connector, the transmitter connector is provided with a transmitter full-pressure interface and a transmitter negative pressure interface, the upper section of the pressure taking head is a cylindrical connector, the left side surface and the right side surface of the lower section of the pressure taking head are opposite to each other and are provided with a left inclined surface and a right inclined surface which are symmetrical, the left inclined surface and the right inclined surface are symmetrically provided with a full-pressure channel and a static pressure channel, the axes of the full-pressure channel and the static pressure channel are parallel to the axis of the pressure taking head and are positioned in the same plane, the cylindrical connector at the upper section of the pressure taking head is provided with a mounting sleeve which is sleeved outside the pressure guide pipe and is connected with The full-pressure balance hole and the static pressure balance hole are respectively communicated with the tops of the full-pressure channel and the static pressure channel; the full-pressure water storage hole and the static-pressure water storage hole are respectively arranged at the front side and the rear side of the axis of the pressure taking head, the axes of the full-pressure water storage hole and the static-pressure water storage hole are parallel to the axis of the pressure taking head and are positioned in the same plane, the tops of the full-pressure channel and the static-pressure channel are respectively communicated with the full-pressure water storage hole and the static-pressure water storage hole through the full-pressure flow guide channel and the static-pressure flow guide channel, the axes of the full-pressure flow guide channel and the static-pressure flow guide channel are parallel to each other and are positioned in the same plane as the axes of the full-pressure balance hole and the static-pressure balance hole, the full-pressure pipe and the static-pressure pipe respectively extend into the full-pressure water storage hole and the static-pressure water storage hole, and the bottoms of the full-pressure pipe and the static-pressure pipe extend to the positions below the full-pressure, gaps are reserved between the bottoms of the full-pressure guide pipe and the static pressure guide pipe and the bottoms of the full-pressure water storage hole and the static pressure water storage hole; short pipes are welded at the openings at the upper ends of the full-pressure water storage hole and the static-pressure water storage hole respectively, and the full-pressure pipe and the static-pressure pipe respectively penetrate through the short pipes at the openings at the upper ends of the full-pressure water storage hole and the static-pressure water storage hole in a sealing mode and extend into the full-pressure water storage hole and the static-pressure water storage hole.
When the Pitot-bar flow sensor for measuring water which is not full of pipes is used, the injected water in the full-pressure water storage hole and the static-pressure water storage hole is firstly injected, the height of the injected water is consistent with the height of the full-pressure balance hole and the static-pressure balance hole, when the water level in the pipeline fluctuates greatly, the positions of the full-pressure hole and the static-pressure hole which are lower than the pressure taking head gradually rise, along with the rising of the water level, gas in the pipeline can be discharged through the full-pressure channel and the static-pressure channel through the full-pressure balance hole and the static-pressure balance hole, the pressure can not be directly generated at the bottoms of the full-pressure guide pipe and the static-pressure guide pipe, the measurement error can not be generated, the pressure taking effect can not be influenced, and then the full-pressure and. The Pitot-bar flow sensor changes the traditional structure that the full-static pressure guide pipe and the static pressure channel are directly connected, and the influence of gas on the measured pressure when water is not filled in the pipe is ingeniously discharged by arranging the full-static pressure balance hole and the static pressure balance hole, so that the pressure taking effect is good, and the measurement error is avoided.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of the principal cross-sectional structure of a Pitotbar flow sensor of the present invention measuring water in a short pipe.
Fig. 2 is a side view schematic of fig. 1.
Fig. 3 is an enlarged cross-sectional view taken along line a-a of fig. 1.
Detailed Description
Referring to fig. 1-3, the pitot-bar flow sensor for measuring water in a pipe comprises a pressure measuring head 100 and a pressure guide pipe 200 connected with the pressure measuring head, wherein the pressure guide pipe 200 comprises a full-pressure guide pipe 210 and a static pressure guide pipe 220, the top ends of the full-pressure guide pipe 210 and the static pressure guide pipe 220 are connected with a transmitter connector 300, the transmitter connector 300 is provided with a transmitter full-pressure interface 310 and a transmitter negative pressure interface 320, the upper section of the pressure measuring head 100 is a cylindrical connector 110, the left and right opposite side surfaces of the lower section are provided with symmetrical left and right inclined surfaces 120 and 130, the left and right inclined surfaces 120 and 130 are symmetrically provided with a full-pressure hole 121 and a static pressure hole 131, the pressure measuring head 100 is internally provided with a full-pressure passage 122 and a static pressure passage 132 which are communicated with the full-pressure hole 121 and the static pressure hole 131, the axes of the full-pressure passage 122 and the static pressure passage 132 are parallel to the axis of the pressure measuring head 100 and are positioned in the same plane, the cylindrical connector 110 at the, the left side surface and the right side surface of the pressure taking head 100 are symmetrically provided with a full pressure balance hole 123 and a static pressure balance hole 133, the axes of which are in the same straight line and are vertical to the axis of the pressure taking head, and the full pressure balance hole 123 and the static pressure balance hole 133 are respectively communicated with the tops of the full pressure channel 122 and the static pressure channel 132; the pressure tapping head further comprises a full-pressure water storage hole 124 and a static-pressure water storage hole 134 which extend downwards from the top of the cylindrical joint 110 at the upper section of the pressure tapping head 100 to the positions below the full-pressure balancing hole 123 and the static-pressure balancing hole 133, the full-pressure water storage hole 124 and the static-pressure water storage hole 134 are respectively arranged at the front side and the rear side of the axis of the pressure tapping head, the axes of the full-pressure water storage hole 124 and the static-pressure water storage hole 134 are parallel to the axis of the pressure tapping head 100 and are positioned in the same plane, the tops of the full-pressure passage 122 and the static-pressure passage 132 are respectively communicated with the full-pressure water storage hole 124 and the static-pressure water storage hole 134 through the full-pressure diversion passage 125 and the static-pressure diversion passage 135, the axes of the full-pressure diversion passage 125 and the static-pressure diversion passage 135 are parallel to each other and are positioned in the same plane with the axes of the full-pressure balancing hole 123 and the static-pressure balancing hole 133, the full-pressure pipe, a gap 150 is formed between the bottoms of the full-pressure guide pipe 210 and the static pressure guide pipe 220 and the bottoms of the full-pressure water storage hole 124 and the static pressure water storage hole 134; short pipes 160 are welded at the openings at the upper ends of the full-pressure water storage hole 124 and the static pressure water storage hole 134 respectively, and the full-pressure pipe 210 and the static pressure pipe 220 respectively and hermetically penetrate through the short pipes 160 at the openings at the upper ends of the full-pressure water storage hole 124 and the static pressure water storage hole 134 and extend into the full-pressure water storage hole 124 and the static pressure water storage hole 134. The transmitter joint 300 is further connected with a full-pressure blowback joint 330 and a static-pressure blowback joint 340 which are communicated with the full-pressure pipe 210 and the static-pressure pipe 220.
Claims (2)
1. A Pitot flow sensor for measuring water in a pipe is characterized by comprising a pressure taking head (100) and a pressure guide pipe (200) connected with the pressure taking head, wherein the pressure guide pipe (200) comprises a full-pressure guide pipe (210) and a static pressure guide pipe (220), the top ends of the full-pressure guide pipe (210) and the static pressure guide pipe (220) are connected with a transmitter joint (300), the transmitter joint (300) is provided with a transmitter full-pressure interface (310) and a transmitter negative pressure interface (320), the upper section of the pressure taking head (100) is a cylindrical joint (110), the left side surface and the right side surface opposite to the lower section of the pressure taking head are provided with symmetrical left and right inclined surfaces (120 and 130), the left and right inclined surfaces (120 and 130) are symmetrically provided with a full-pressure hole (121) and a static pressure hole (131), a full-pressure channel (122) and a static pressure channel (132) communicated with the full-pressure hole (121) and the static pressure hole (131) are arranged in the pressure taking head (100), and the axes of the full-pressure channel, get the cylindricality of pressure head (100) upper segment and connect (110) to be equipped with on and establish the installation sleeve (140) that the cover links to each other in pressure pipe (200) outside and with changer joint (300) bottom, its characterized in that: the left side surface and the right side surface of the pressure taking head (100) are symmetrically provided with a full-pressure balance hole (123) and a static-pressure balance hole (133) which have axes in the same straight line and are vertical to the axes of the pressure taking head, and the full-pressure balance hole (123) and the static-pressure balance hole (133) are respectively communicated with the tops of the full-pressure channel (122) and the static-pressure channel (132); the water-saving device also comprises a full-pressure water storage hole (124) and a static-pressure water storage hole (134) which extend downwards from the top of the cylindrical joint (110) at the upper section of the pressure taking head (100) to the positions below the full-pressure balance hole (123) and the static-pressure balance hole (133), the full-pressure water storage hole (124) and the static-pressure water storage hole (134) are respectively arranged at the front side and the rear side of the axis of the pressure taking head, the axes of the full-pressure water storage hole (124) and the static-pressure water storage hole (134) are parallel to the axis of the pressure taking head (100) and are positioned in the same plane, the tops of the full-pressure channel (122) and the static-pressure channel (132) are respectively communicated with the full-pressure water storage hole (124) and the static-pressure water storage hole (134) through a full-pressure flow guide channel (125) and a static-pressure flow guide channel (135), the axes of the full-pressure flow guide channel (125) and the, the full-pressure guide pipe (210) and the static pressure guide pipe (220) extend into the full-pressure water storage hole (124) and the static pressure water storage hole (134) respectively, the bottoms of the full-pressure guide pipe (210) and the static pressure guide pipe (220) extend to the lower parts of the full-pressure balance hole (123) and the static pressure balance hole (133), and a gap (150) is formed between the bottoms of the full-pressure guide pipe (210) and the static pressure guide pipe (220) and the bottoms of the full-pressure water storage hole (124) and the static pressure water storage hole (134); short pipes (160) are welded at orifices positioned at the upper ends of the full-pressure water storage hole (124) and the static pressure water storage hole (134), and the full-pressure pipe (210) and the static pressure pipe (220) respectively penetrate through the short pipes (160) at the orifices at the upper ends of the full-pressure water storage hole (124) and the static pressure water storage hole (134) in a sealing manner and extend into the full-pressure water storage hole (124) and the static pressure water storage hole (134); when water is injected into the full-pressure water storage hole (124) and the static-pressure water storage hole (134) and the height of the injected water is consistent with that of the full-pressure balancing hole (123) and the static-pressure balancing hole (133), gas in the pipeline can be discharged from the full-pressure balancing hole (123) and the static-pressure balancing hole (133) through the full-pressure channel (122) and the static-pressure channel (132).
2. A pitot-bar flow sensor for measuring sub-pipe water as claimed in claim 1 wherein: and the transmitter joint (300) is also connected with a full-pressure back-blowing joint (330) and a static-pressure back-blowing joint (340) which are communicated with the full-pressure guide pipe (210) and the static-pressure guide pipe (220).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811522429.1A CN109341790B (en) | 2018-12-13 | 2018-12-13 | Pitotbar flow sensor for measuring water not full of pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811522429.1A CN109341790B (en) | 2018-12-13 | 2018-12-13 | Pitotbar flow sensor for measuring water not full of pipe |
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| Publication Number | Publication Date |
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| CN109341790A CN109341790A (en) | 2019-02-15 |
| CN109341790B true CN109341790B (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811522429.1A Active CN109341790B (en) | 2018-12-13 | 2018-12-13 | Pitotbar flow sensor for measuring water not full of pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110686736A (en) * | 2019-11-14 | 2020-01-14 | 上海权宥环保科技有限公司 | Pressure taking head of Pitotbar flow sensor |
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| US5481925A (en) * | 1994-09-09 | 1996-01-09 | Environmental Technologies, Inc. | Low turbulence airflow sensor |
| CN202101704U (en) * | 2011-05-26 | 2012-01-04 | 上海华强浮罗仪表有限公司 | Porous pressure measurement Verabar flowmeter |
| CN203964967U (en) * | 2014-08-07 | 2014-11-26 | 辽宁毕托巴科技有限公司 | A kind of measurement is the flow measurement device of full packages sewage not |
| CN204301915U (en) * | 2014-11-26 | 2015-04-29 | 扬州江天流量仪表有限公司 | With the T-shaped pressure drag differential pressure pick-up of steam vent |
| CN207456534U (en) * | 2017-09-25 | 2018-06-05 | 艾默生(北京)仪表有限公司 | For the integrated form connector and differential pressure flowmeter of differential pressure flowmeter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122048A (en) * | 2014-08-06 | 2014-10-29 | 苏州宝骅机械技术有限公司 | High-pressure gas tightness detection system |
-
2018
- 2018-12-13 CN CN201811522429.1A patent/CN109341790B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481925A (en) * | 1994-09-09 | 1996-01-09 | Environmental Technologies, Inc. | Low turbulence airflow sensor |
| CN202101704U (en) * | 2011-05-26 | 2012-01-04 | 上海华强浮罗仪表有限公司 | Porous pressure measurement Verabar flowmeter |
| CN203964967U (en) * | 2014-08-07 | 2014-11-26 | 辽宁毕托巴科技有限公司 | A kind of measurement is the flow measurement device of full packages sewage not |
| CN204301915U (en) * | 2014-11-26 | 2015-04-29 | 扬州江天流量仪表有限公司 | With the T-shaped pressure drag differential pressure pick-up of steam vent |
| CN207456534U (en) * | 2017-09-25 | 2018-06-05 | 艾默生(北京)仪表有限公司 | For the integrated form connector and differential pressure flowmeter of differential pressure flowmeter |
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| CN109341790A (en) | 2019-02-15 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20210119 Address after: 112600 No. 265, Ling Dong Street, Tieling Economic Development Zone, Tieling, Liaoning Patentee after: Liaoning pitotbar Polytron Technologies Inc. Address before: 201500 room 3356, 65 lane, 65 Ring Road, Fengjing town, Jinshan District, Shanghai. Patentee before: SHANGHAI QUANYOU ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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| 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. |
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| 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 invention: A Bitoba flow sensor for measuring incomplete water in pipes Effective date of registration: 20231228 Granted publication date: 20200501 Pledgee: Tieling Branch of Shengjing Bank Co.,Ltd. Pledgor: Liaoning Bitobar Technology Co.,Ltd. Registration number: Y2023210000358 |