CN105387894A - Bitobar flowmeter - Google Patents
Bitobar flowmeter Download PDFInfo
- Publication number
- CN105387894A CN105387894A CN201510667496.2A CN201510667496A CN105387894A CN 105387894 A CN105387894 A CN 105387894A CN 201510667496 A CN201510667496 A CN 201510667496A CN 105387894 A CN105387894 A CN 105387894A
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- China
- Prior art keywords
- pressure
- axis
- head
- square tube
- static pressure
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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
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a Bitobar flowmeter which comprises a pipeline section and a sensor inserted into the pipeline section. The sensor comprises a straight hexahedron-shaped pressure obtaining head, a full-pressure guide square pipe and a static-pressure guide square pipe which are in sealed connection with the upper end and the lower end of the straight hexahedron-shaped pressure obtaining head. The straight hexahedron-shaped pressure obtaining head is provided with a full-pressure half hole and a static-pressure half hole which are formed in the left side and the right side of the upper and lower axes of the straight hexahedron-shaped pressure obtaining head and are communicated with the full-pressure guide square pipe and the static-pressure guide square pipe respectively. The left side and the right side of the straight hexahedron-shaped pressure obtaining head are correspondingly provided with a full-pressure hole and a static-pressure hole which are communicated with the full-pressure half hole and the static-pressure half hole respectively. The upper end of the full-pressure guide square pipe and the lower end the static-pressure guide square pipe are provided with an upper end cover and a lower end cover respectively. The upper end cover and the lower end cover are provided with a full-pressure connector and a static-pressure connector respectively. When low-speed gas flow in a pipeline is measured, large pressure will be produced on the incident flow face of the pressure obtaining head, small pressure is produced on the exit flow face of the pressure obtaining head, the extracted full-pressure and static-pressure difference is large, and therefore a measuring result is more accurate.
Description
Technical field
The present invention relates to a kind of flowmeter, specifically relate to a kind of bi toba flow meter for gas flow in measuring channel.
Background technology
The bi toba flow meter of gas flow in measuring channel of the prior art, primarily of Pitot bar sensor, differential pressure transmitter and flow integrator composition in structure, because bi toba flow meter composition is simple, easy for installation and be widely used in the measurement of fluids within pipes flow.Pressure element when Pitot bar sensor is bi toba flow meter measuring channel inner fluid flow, its structure composition mainly comprises pressure head and connecting pipe, connecting pipe has outer tube and interior pipe, outer tube and interior pipe are connected with total head interface and static pressure interface respectively, pressure head comprises epimere cylindricality joint and hypomere pressure head body, pressure head body lower part has pitot hole and baroport, in pressure head body, there is the total head passage be connected with pitot hole and static pressure passage, pressure head to be connected with connecting pipe with its cylindricality joint and to be formed Pitot and cling to sensor, the formation relative complex of above-mentioned Pitot bar sensor of the prior art, the manufacture craft of pressure head and connecting pipe requires high, when gas in pipelines flow velocity is lower, pressure head pressure effect is bad in addition, not accurate enough when causing final gas in pipelines flow measurement, less stable when the Pitot bar sensor of said structure is loaded on pipeline simultaneously, running into, exterior object touching is easily loosening even to come off.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of bi toba flow meter, when gas in pipelines flow velocity is lower, the present invention also relatively accurately can measure gas in pipelines flow, and the sensor construction in the present invention is simple, easy to process, install firmly with duct section.
For solving the problems of the technologies described above, bi toba flow meter of the present invention, comprise sensor, differential pressure transmitter and flow integrator, also comprise duct section, described sensor is inserted in this duct section, this sensor comprises lineal hexahedral shape pressure head and sealing is connected on lineal hexahedral shape pressure head, the total head pilot square tube at lower two ends and static pressure pilot square tube, total head pilot square tube and static pressure pilot square tube seal with duct section respectively and are fixedly linked, on it, lower two ends extend outside duct section respectively, described lineal hexahedral shape pressure head is provided with and is placed on this lineal hexahedral shape pressure head, lower axis is left, right both sides and the total head half bore be connected with static pressure pilot square tube with described total head pilot square tube respectively and static pressure half bore, a left side for lineal hexahedral shape pressure head, right both sides are corresponding is provided with the pitot hole and baroport that are connected with static pressure half bore with total head half bore respectively, described total head pilot square tube and static pressure pilot square tube upper, lower two ends are respectively equipped with, bottom end cover, on, bottom end cover offers respectively total head interface and static pressure interface, described lineal hexahedral shape pressure head upper, the axis of lower axis and total head pilot square tube and static pressure pilot square tube on the same line, described pitot hole, the axis of baroport and a left side for lineal hexahedral shape pressure head, the axis of right axis and duct section on the same line, the axis of described total head half bore and static pressure half bore respectively with described pitot hole, the axis perpendicular of baroport, lineal hexahedral shape pressure head upper, lower axis, the axis of total head pilot square tube and static pressure pilot square tube, the axis of pitot hole and baroport, a left side for lineal hexahedral shape pressure head, right axis, the axis of duct section and the axis of total head half bore and static pressure half bore are all in same plane.
As improvement of the present invention, described total head interface and static pressure interface are connected to threeway respectively by short tube.
Adopt the bi toba flow meter of said structure, during measuring channel inner fluid flow, need to be connected with measured seal for pipe joints with duct section of the present invention.Because the pressure head in the sensor of bi toba flow meter of the present invention is lineal hexahedral shape structure, when gas in pipelines flow velocity is lower, the fluoran stream surface of pressure head produces larger resistance to gas, gas can produce larger pressure when impacting the fluoran stream surface of pressure head in sensor of the present invention, form larger total head signal, when gas in pressure head fluoran stream surface both sides by time go stream interface to produce vortex phenomenon at pressure head, the static pressure that baroport obtains is less even can form negative pressure, the pressure reduction of the total head that the pressure head therefore in the present invention extracts and static pressure is larger, make the gas in pipelines flow that finally records more accurate, efficiently reduce measuring error, sensor construction in addition in bi toba flow meter of the present invention is only made up of pressure head and the square tube being connected in upper/lower terminal, structure is simple, easy to process, the present invention is that entirety extend in duct section, be fixedly linked by the square tube of upper/lower terminal and duct section, that installs is firm, stable, is not easy the phenomenon occurring coming off and loosening.
In addition, described total head interface and static pressure interface are connected to threeway respectively by short tube, make the differential pressure transmitter in the present invention and flow integrator two covers can be housed simultaneously, realize a preparation and a use, another differential pressure transmitter for subsequent use can being enabled when one of them differential pressure transmitter breaks down, the measurement to fluids within pipes flow can not be affected when keeping in repair.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the main sectional structure schematic diagram of bi toba flow meter of the present invention, omits the differential pressure transmitter and flow integrator that are connected with sensor in figure.
Fig. 2 is the cross-sectional schematic along A-A line in Fig. 1.
Fig. 3 is the one-piece construction schematic diagram of bi toba flow meter of the present invention.
Embodiment
See Fig. 1-Fig. 3, bi toba flow meter of the present invention, comprise sensor 20, differential pressure transmitter 40 and flow integrator 50, also comprise duct section 10, described sensor 20 is inserted in this duct section 10, this sensor 20 comprises lineal hexahedral shape pressure 21 and sealing is connected on lineal hexahedral shape pressure head, the total head pilot square tube 22 at lower two ends and static pressure pilot square tube 23, total head pilot square tube 22 and static pressure pilot square tube 23 seal with duct section 10 respectively and are fixedly linked, the upper end of total head pilot square tube 22 and the lower end of static pressure pilot square tube 23 extend outside duct section 10 respectively, described lineal hexahedral shape pressure 21 is provided with and is placed on this lineal hexahedral shape pressure head, lower axis 201 is left, right both sides and the total head half bore 24 be connected with static pressure pilot square tube 23 with described total head pilot square tube 22 respectively and static pressure half bore 25, a left side for lineal hexahedral shape pressure 21, right both sides are corresponding is provided with the pitot hole 26 and baroport 27 that are connected with static pressure half bore 25 with total head half bore 24 respectively, the upper end of described total head pilot square tube 22 and the lower end of static pressure pilot square tube 23 are respectively equipped with, bottom end cover 28, 29, on, bottom end cover 28, total head interface 30 and static pressure interface 31 is offered respectively on 29, described lineal hexahedral shape pressure head upper, the axis 202 of lower axis 201 and total head pilot square tube 22 and static pressure pilot square tube 23, 203 on the same line, described pitot hole 26, the axis 204 of baroport 27, 205 with the left side of lineal hexahedral shape pressure head, the axis 207 of right axis 206 and duct section 10 on the same line, the axis 208 of described total head half bore 24 and static pressure half bore 25, 209 respectively with described pitot hole 26, the axis 204 of baroport 27, 205 is perpendicular, lineal hexahedral shape pressure head upper, lower axis 201, the axis 202 of total head pilot square tube and static pressure pilot square tube, 203, the axis 204 of pitot hole and baroport, 205, a left side for lineal hexahedral shape pressure head, right axis 206, the axis 207 of duct section and the axis 208 of total head half bore and static pressure half bore, 209 all in same plane.Described total head interface 30 and static pressure interface 31 are connected to threeway 33 respectively by short tube 32.
See one-piece construction schematic diagram during Fig. 3, Fig. 3 to be the present invention with differential pressure transmitter 40 and flow integrator 50 form flowmeter.
Claims (2)
1. a bi toba flow meter, comprise sensor, differential pressure transmitter and flow integrator, it is characterized in that: also comprise duct section, described sensor is inserted in this duct section, this sensor comprises lineal hexahedral shape pressure head and sealing is connected on lineal hexahedral shape pressure head, the total head pilot square tube at lower two ends and static pressure pilot square tube, total head pilot square tube and static pressure pilot square tube seal with duct section respectively and are fixedly linked, on it, lower two ends extend outside duct section respectively, described lineal hexahedral shape pressure head is provided with and is placed on this lineal hexahedral shape pressure head, lower axis is left, right both sides and the total head half bore be connected with static pressure pilot square tube with described total head pilot square tube respectively and static pressure half bore, a left side for lineal hexahedral shape pressure head, right both sides are corresponding is provided with the pitot hole and baroport that are connected with static pressure half bore with total head half bore respectively, described total head pilot square tube and static pressure pilot square tube upper, lower two ends are respectively equipped with, bottom end cover, on, bottom end cover offers respectively total head interface and static pressure interface, described lineal hexahedral shape pressure head upper, the axis of lower axis and total head pilot square tube and static pressure pilot square tube on the same line, described pitot hole, the axis of baroport and a left side for lineal hexahedral shape pressure head, the axis of right axis and duct section on the same line, the axis of described total head half bore and static pressure half bore respectively with described pitot hole, the axis perpendicular of baroport, lineal hexahedral shape pressure head upper, lower axis, the axis of total head pilot square tube and static pressure pilot square tube, the axis of pitot hole and baroport, a left side for lineal hexahedral shape pressure head, right axis, the axis of duct section and the axis of total head half bore and static pressure half bore are all in same plane.
2. bi toba flow meter as claimed in claim 1, is characterized in that: described total head interface and static pressure interface are connected to threeway respectively by short tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510667496.2A CN105387894A (en) | 2015-10-16 | 2015-10-16 | Bitobar flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510667496.2A CN105387894A (en) | 2015-10-16 | 2015-10-16 | Bitobar flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105387894A true CN105387894A (en) | 2016-03-09 |
Family
ID=55420441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510667496.2A Pending CN105387894A (en) | 2015-10-16 | 2015-10-16 | Bitobar flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105387894A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784021A (en) * | 2016-04-22 | 2016-07-20 | 南京友智科技有限公司 | Whole-section flow measurement device for circular pipeline |
| CN110617857A (en) * | 2019-11-14 | 2019-12-27 | 上海权宥环保科技有限公司 | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08248055A (en) * | 1995-03-14 | 1996-09-27 | Shibata Kagaku Kikai Kogyo Kk | Current meter |
| US5753825A (en) * | 1996-07-19 | 1998-05-19 | Brandt, Jr.; Robert O. | Velocity averaging pitot |
| US20050229717A1 (en) * | 2004-04-06 | 2005-10-20 | Byong-Jo Yun | Average bidirectional flow tube |
| CN203908603U (en) * | 2014-06-27 | 2014-10-29 | 江华根 | Annubar flowmeter |
| CN204439142U (en) * | 2015-03-18 | 2015-07-01 | 内蒙古天庆工程机械设备有限公司 | Low flow velocity, high precision pitot tube differential pressure flow sensor pressure head |
| CN204439143U (en) * | 2015-03-18 | 2015-07-01 | 内蒙古天庆工程机械设备有限公司 | A kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head |
-
2015
- 2015-10-16 CN CN201510667496.2A patent/CN105387894A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08248055A (en) * | 1995-03-14 | 1996-09-27 | Shibata Kagaku Kikai Kogyo Kk | Current meter |
| US5753825A (en) * | 1996-07-19 | 1998-05-19 | Brandt, Jr.; Robert O. | Velocity averaging pitot |
| US20050229717A1 (en) * | 2004-04-06 | 2005-10-20 | Byong-Jo Yun | Average bidirectional flow tube |
| CN203908603U (en) * | 2014-06-27 | 2014-10-29 | 江华根 | Annubar flowmeter |
| CN204439142U (en) * | 2015-03-18 | 2015-07-01 | 内蒙古天庆工程机械设备有限公司 | Low flow velocity, high precision pitot tube differential pressure flow sensor pressure head |
| CN204439143U (en) * | 2015-03-18 | 2015-07-01 | 内蒙古天庆工程机械设备有限公司 | A kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784021A (en) * | 2016-04-22 | 2016-07-20 | 南京友智科技有限公司 | Whole-section flow measurement device for circular pipeline |
| CN110617857A (en) * | 2019-11-14 | 2019-12-27 | 上海权宥环保科技有限公司 | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter |
| 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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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160309 |
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| WD01 | Invention patent application deemed withdrawn after publication |