CN102346055A - Differential pressure and displacement double-parameter measurement variable-area target type flowmeter - Google Patents
Differential pressure and displacement double-parameter measurement variable-area target type flowmeter Download PDFInfo
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- CN102346055A CN102346055A CN 201010243708 CN201010243708A CN102346055A CN 102346055 A CN102346055 A CN 102346055A CN 201010243708 CN201010243708 CN 201010243708 CN 201010243708 A CN201010243708 A CN 201010243708A CN 102346055 A CN102346055 A CN 102346055A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 82
- 238000005259 measurement Methods 0.000 title claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 34
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 12
- 230000009977 dual effect Effects 0.000 claims description 29
- 206010008469 Chest discomfort Diseases 0.000 claims description 10
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention discloses a differential pressure and displacement double-parameter measurement variable-area target type flowmeter which comprises a measurement chamber with a fluid feeding channel and a fluid discharging channel, and an arithmetic device, wherein the fluid feeding channel is provided with a tapered expanded section; a target type displacement measurement component opposite to the expanded section is arranged in the measurement chamber; a differential pressure measurement component is arranged in the measurement chamber; and the displacement measurement component and the differential pressure measurement component are electrically connected with the arithmetic device respectively. The differential pressure and displacement double-parameter measurement variable-area target type flowmeter detects flow according to the displacement of a target and differential pressure in front of and behind the expanded section, and has the advantages of high measurement precision, high stability, high overload resistance and the like.
Description
Technical field
The present invention relates to field of flow meters, more particularly, relate to the variable area target type meter of a kind of differential pressure-displacement with dual parameter measurement.
Background technology
The basic functional principle of target type meter is; The target sheet that is installed on measuring chamber fluid through the time receive fluid impact force action produce one section displacement; This displacement becomes strict funtcional relationship with flow rate of fluid (impulse force); Can calculate flow rate of fluid through measuring this displacement (impulse force just), further draw the flow of fluid.In order to guarantee the stressed impulse force that is equal to fluid of target sheet, when its displacement, do not allow the existence of any friction force, otherwise will bring error.So the installation of general traditional target type meter target bar all is to adopt " semi-girder " structure.The structure of this employing " semi-girder " fixed target sheet has following shortcoming: 1, " semi-girder " damages when antagonism large impact power easily, and anti-overload ability is relatively poor; 2, during the displacement of target sheet, be that the variation of the circulation area that its displacement brings is non-linear, is difficult to find out intrinsic mathematical formulae and describes with respect to the strong point rotation of target bar; 3, because the target bar is a semi-girder; Because the existence of factors such as inertial force is difficult to rest on a certain fixed position; But vibration back and forth within the specific limits; When flow rate of fluid changes relatively acutely; This vibration is particularly evident; This just makes the actual displacement amount of target sheet and theoretic displacement have bigger deviation, thereby causes the measuring accuracy of flowmeter to reduce.
Summary of the invention
The technical matters that the present invention will solve is, the variable area target type meter of the differential pressure-displacement with dual parameter measurement of to the defective of the above-mentioned target type meter measuring accuracy difference of prior art, provide that a kind of measuring accuracy is high, good stability and anti-overload ability are strong.
The technical solution adopted for the present invention to solve the technical problems is: construct the variable area target type meter of a kind of differential pressure-displacement with dual parameter measurement, comprise the measuring chamber that has fluid admission passage and flow pass, said fluid admission passage has the expansion segment of taper; Be provided with the target formula displacement measurement assembly over against said expansion segment in the said measuring chamber, said measuring chamber also is provided with the differential pressure measurement assembly; Said flowmeter also comprises arithmetic unit, and said displacement measurement assembly and said differential pressure measurement assembly are electrically connected with said arithmetic unit respectively.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement; Said target formula displacement measurement assembly comprises the target sheet; The target bar; Piston; Piston cylinder; Back-moving spring be used to measure the displacement transducer of piston displacement; Said target bar one end is fixed with the target sheet; The other end is fixed on the piston; Said piston is positioned at said piston cylinder; Send out back-moving spring said between the bottom of said piston and piston cylinder; Said displacement transducer is positioned at the outside of piston cylinder; Said target sheet is positioned at said expansion segment, and said displacement transducer is electrically connected with said arithmetic unit.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement; Said differential pressure measurement assembly comprises the high pressure chest that is arranged in the said measuring chamber; And the differential pressure pick-up that is arranged on the separated place of said high pressure chest and said measuring chamber; Have the high pressure pressure tappings on the said fluid admission passage; Be connected with communicating pipe between said high pressure pressure tappings and the said high pressure chest, said differential pressure pick-up is electrically connected with said arithmetic unit.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement, said target sheet is circular, and the minimum diameter of said expansion segment is greater than the diameter of said target sheet.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement, the setting of section concentric is changeed in said target sheet and target bar and said expansion.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement, said displacement transducer is a non-contacting sensor.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement, the tapering of said expansion segment is 60 °～120 °.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement, the tapering of said expansion segment is 90 °.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement, said arithmetic unit is positioned at the outside of said measuring chamber.
In the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement, said arithmetic unit has display module.
The variable area target type meter of the differential pressure of embodiment of the present invention-displacement with dual parameter measurement; Have following beneficial effect: the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement detects flow through the displacement of target sheet and the differential pressure before and after the expansion segment, has advantages such as measuring accuracy height, good stability and anti-overload ability are strong.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the structural representation of preferred embodiment of the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement.
Embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, contrast accompanying drawing at present and describe the specific embodiment of the present invention in detail.
The variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement comprises the measuring chamber that has fluid admission passage and flow pass, and the fluid admission passage has the expansion segment of taper; Be provided with the target formula displacement measurement assembly over against said expansion segment in the measuring chamber, measuring chamber also is provided with the differential pressure measurement assembly; Said flowmeter also comprises arithmetic unit; Said displacement measurement assembly and said differential pressure measurement assembly are electrically connected with said arithmetic unit respectively; Circulation area is confirmed in displacement through measuring the target sheet, confirms the flow through the fluid of flowmeter through the differential pressure of measuring the expansion segment front and back.Introduce the structure of flowmeter of the present invention in detail below in conjunction with embodiment.
As shown in Figure 1; A preferred embodiment for the variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement; This flowmeter comprises the measuring chamber 100 that has fluid admission passage 110 and flow pass 120, and fluid admission passage 110 has the expansion segment 111 of taper; Be provided with the target formula displacement measurement assembly over against expansion segment 111 in the measuring chamber 100, this target formula displacement measurement assembly comprises target sheet 210, target bar 220, piston 230, piston cylinder 240, back-moving spring 250 and is used to measure the displacement transducer 260 of piston 230 displacements.Target bar 220 1 ends are fixed with target sheet 210; The other end is fixed on the piston 230; Piston 230 is positioned at piston cylinder 240; Piston cylinder 240 slides relatively; Back-moving spring 250 is between the bottom of piston 230 and piston cylinder 240, and piston cylinder 240 is fixed in the measuring chamber 100 through support, and displacement transducer 260 is positioned at the outside of piston cylinder 240; Target sheet 210 is positioned at expansion segment 111, and displacement transducer 260 is electrically connected with arithmetic unit 300.Target sheet 210 is circular, and the minimum diameter of expansion segment 111 is greater than the diameter of target sheet 210, and target sheet 210 and target bar 220 change section 111 concentric settings with expansion.Because target sheet 210 is rigidly connected through target bar 220 and piston 230; Target sheet 210 promotes piston 230 motions under fluid impact; Can obtain the displacement of target sheet 210 through the displacement of measuring piston 230; The geometric parameter of the expansion segment 111 of taper is confirmed; When the position of target sheet 210 is confirmed; Can calculate the circulation area of fluid this moment; The fluid flow area of flowmeter and the displacement of target sheet 210 are strict funtcional relationship; When displacement transducer 260 passed to arithmetic unit 300 with displacement signal, arithmetic unit can calculate corresponding circulation area.
Only there is circulation area also to be not enough to the flow of Fluid Computation; In the measuring chamber 100 of flowmeter of the present invention, also be provided with the differential pressure measurement assembly; This differential pressure measurement assembly comprises the high pressure chest 400 that is arranged on measuring chamber interior 100; Be arranged on the differential pressure pick-up 410 of the separated place of high pressure chest 400 and said measuring chamber 100; Have high pressure pressure tappings 112 on the fluid admission passage 110; Be connected with communicating pipe 420 between high pressure pressure tappings 112 and the high pressure chest 400; Pressure in the high pressure chest 400 gets into expansion segment 111 pressure before with fluid and equates; The pressure of measuring chamber 100 then equals through the pressure after the expansion segment 111; Differential pressure pick-up 400 is electrically connected with arithmetic unit 300, is used for passing to arithmetic unit 300 with measuring the differential pressure parameter.Arithmetic unit 300 is according to the displacement signal and the differential pressure signal that make referrals to; Can calculate the pressure differential of circulation area and front and back; Just can calculate the flow of this moment; Formula according to circulation area and differential pressure calculated flow rate is a common practise; Single-chip microcomputer or the conventional IC chip of arithmetic unit 300 for having calculation function repeats no more.
In the present embodiment, displacement transducer 260 is a non-contacting sensor, for example hall effect sensor etc.Differential pressure pick-up 410 all is conventional sensor with displacement transducer 260, repeats no more.
In the present embodiment, the tapering of cone expansion section 111 is 90 °, and in the reality, preferably adopting tapering is 60 °～120 ° cone expansion section, can certainly adopt the cone expansion section of other taperings.
In the present embodiment, arithmetic unit 300 is positioned at the outside of measuring chamber 100, and this arithmetic unit also comprises display module, can be digital display or mechanical display devices, is used to the flow that shows that flowmeter records.
Introduced the architectural feature of flowmeter of the present invention above, introduced flowmeter of the present invention below and how to work.
During flowmeter work; Fluid is got into by fluid inlet port 110; The target sheet 210 that is positioned at expansion segment 111 promotes piston 230 motions under the effect of fluid; Displacement transducer 260 is measured the displacement of piston 230 and is passed to arithmetic unit 300; Differential pressure pick-up 410 records fluid simultaneously and is expanding the differential pressure of adorning section 111 front and back and passing to arithmetic unit 300; Calculate the circulation area of fluid this moment by displacement parameter; Can obtain the fluid flow of this moment according to differential pressure then, arithmetic unit 300 is presented at the data on flows of calculating on the display module.
Owing to have friction force between piston 230 in the target formula displacement measurement assembly and the piston cylinder 240; Motion to piston has certain damping action; Because piston 230 is rigidly connected through target bar 220 with target sheet 210; Also promptly the motion of target sheet 210 had damping action; This damping action has been eliminated target sheet 210 chronic exercises back and forth that cause owing to change in fluid pressure in the journey that move past on the throne greatly, effectively raises the precision of flowmeter.
The variable area target type meter of differential pressure of the present invention-displacement with dual parameter measurement detects flow through the displacement of target sheet and the differential pressure before and after the expansion segment, has advantages such as measuring accuracy height, good stability and anti-overload ability are strong.
Combine accompanying drawing that embodiments of the invention are described above; But the present invention is not limited to above-mentioned embodiment; Above-mentioned embodiment only is schematic; Rather than it is restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. the variable area target type meter of differential pressure-displacement with dual parameter measurement is characterized in that, comprises the measuring chamber that has fluid admission passage and flow pass, and said fluid admission passage has the expansion segment of taper; Be provided with the target formula displacement measurement assembly over against said expansion segment in the said measuring chamber, said measuring chamber also is provided with the differential pressure measurement assembly; Said flowmeter also comprises arithmetic unit, and said displacement measurement assembly and said differential pressure measurement assembly are electrically connected with said arithmetic unit respectively.
2. the variable area target type meter of differential pressure according to claim 1-displacement with dual parameter measurement; It is characterized in that; Said target formula displacement measurement assembly comprises the target sheet; The target bar; Piston; Piston cylinder; Back-moving spring be used to measure the displacement transducer of piston displacement; Said target bar one end is fixed with the target sheet; The other end is fixed on the piston; Said piston is positioned at said piston cylinder; Send out back-moving spring said between the bottom of said piston and piston cylinder; Said displacement transducer is positioned at the outside of piston cylinder; Said target sheet is positioned at said expansion segment, and said displacement transducer is electrically connected with said arithmetic unit.
3. the variable area target type meter of differential pressure according to claim 2-displacement with dual parameter measurement; It is characterized in that; Said differential pressure measurement assembly comprises the high pressure chest that is arranged in the said measuring chamber; And the differential pressure pick-up that is arranged on the separated place of said high pressure chest and said measuring chamber; Have the high pressure pressure tappings on the said fluid admission passage; Be connected with communicating pipe between said high pressure pressure tappings and the said high pressure chest, said differential pressure pick-up is electrically connected with said arithmetic unit.
4. the variable area target type meter of differential pressure according to claim 3-displacement with dual parameter measurement is characterized in that, said target sheet is circular, and the minimum diameter of said expansion segment is greater than the diameter of said target sheet.
5. the variable area target type meter of differential pressure according to claim 4-displacement with dual parameter measurement is characterized in that, the setting of section concentric is changeed in said target sheet and target bar and said expansion.
6. the variable area target type meter of differential pressure according to claim 3-displacement with dual parameter measurement is characterized in that, said displacement transducer is a non-contacting sensor.
7. the variable area target type meter of differential pressure according to claim 3-displacement with dual parameter measurement is characterized in that, the tapering of said expansion segment is 60 °～120 °.
8. the variable area target type meter of differential pressure according to claim 3-displacement with dual parameter measurement is characterized in that, the tapering of said expansion segment is 90 °.
9. the variable area target type meter of differential pressure according to claim 3-displacement with dual parameter measurement is characterized in that said arithmetic unit is positioned at the outside of said measuring chamber.
10. the variable area target type meter of differential pressure according to claim 9-displacement with dual parameter measurement is characterized in that said arithmetic unit has display module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102437081A CN102346055B (en) | 2010-08-03 | 2010-08-03 | Differential pressure and displacement double-parameter measurement variable-area target type flowmeter |
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| CN2010102437081A CN102346055B (en) | 2010-08-03 | 2010-08-03 | Differential pressure and displacement double-parameter measurement variable-area target type flowmeter |
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| CN102346055A true CN102346055A (en) | 2012-02-08 |
| CN102346055B CN102346055B (en) | 2012-09-12 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589623A (en) * | 2012-02-29 | 2012-07-18 | 秦武 | High-accuracy wide-range flow meter |
| CN103267546A (en) * | 2013-04-27 | 2013-08-28 | 山东迪泽仪表科技有限公司 | Differential-pressure momentum flow sensor |
| CN105190252A (en) * | 2013-03-14 | 2015-12-23 | 泰利福医疗公司 | Rotary needle and expanding bellows pressure indicator |
| CN105675068A (en) * | 2016-01-18 | 2016-06-15 | 福建省云创集成科技服务有限公司 | Universal-type flow meter based on wing principle |
| CN105865544A (en) * | 2016-05-30 | 2016-08-17 | 贵州大学 | Double-piston symmetrical damping type flow sensor and detection method thereof |
| CN105865545A (en) * | 2016-05-30 | 2016-08-17 | 贵州大学 | Double-probe differential pressure flow sensor and detection method thereof |
| CN107270977A (en) * | 2016-04-06 | 2017-10-20 | 深圳市泉源仪表设备制造有限公司 | A kind of binary channels turbine flowmeter |
| CN107290007A (en) * | 2017-08-22 | 2017-10-24 | 湖南汉德史特仪表有限公司 | A kind of vertical displacement inclined-plane target type meter |
| CN116892985A (en) * | 2023-09-11 | 2023-10-17 | 瑞星久宇燃气设备（成都）有限公司 | Flow metering method and system based on flow characteristics of pressure regulator |
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| CN201724697U (en) * | 2010-08-03 | 2011-01-26 | 深圳市泉源仪表设备制造有限公司 | Variable-area target-type flowmeter capable of measuring dual parameters of differential pressure and displacement |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589623A (en) * | 2012-02-29 | 2012-07-18 | 秦武 | High-accuracy wide-range flow meter |
| CN105190252A (en) * | 2013-03-14 | 2015-12-23 | 泰利福医疗公司 | Rotary needle and expanding bellows pressure indicator |
| CN103267546A (en) * | 2013-04-27 | 2013-08-28 | 山东迪泽仪表科技有限公司 | Differential-pressure momentum flow sensor |
| CN105675068A (en) * | 2016-01-18 | 2016-06-15 | 福建省云创集成科技服务有限公司 | Universal-type flow meter based on wing principle |
| CN107270977A (en) * | 2016-04-06 | 2017-10-20 | 深圳市泉源仪表设备制造有限公司 | A kind of binary channels turbine flowmeter |
| CN105865545A (en) * | 2016-05-30 | 2016-08-17 | 贵州大学 | Double-probe differential pressure flow sensor and detection method thereof |
| CN105865544A (en) * | 2016-05-30 | 2016-08-17 | 贵州大学 | Double-piston symmetrical damping type flow sensor and detection method thereof |
| CN105865544B (en) * | 2016-05-30 | 2019-03-12 | 贵州大学 | Double-piston symmetrical damping flow sensor and its detection method |
| CN105865545B (en) * | 2016-05-30 | 2019-04-02 | 贵州大学 | A kind of dual probe differential pressure flow transducer and its detection method |
| CN107290007A (en) * | 2017-08-22 | 2017-10-24 | 湖南汉德史特仪表有限公司 | A kind of vertical displacement inclined-plane target type meter |
| CN107290007B (en) * | 2017-08-22 | 2024-02-20 | 湖南汉德史特仪表有限公司 | Vertical displacement inclined plane target type flowmeter |
| CN116892985A (en) * | 2023-09-11 | 2023-10-17 | 瑞星久宇燃气设备（成都）有限公司 | Flow metering method and system based on flow characteristics of pressure regulator |
| CN116892985B (en) * | 2023-09-11 | 2023-11-21 | 瑞星久宇燃气设备（成都）有限公司 | Flow metering method and system based on flow characteristics of pressure regulator |
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| CN102346055B (en) | 2012-09-12 |
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Effective date of registration: 20181226 Address after: 410000 Room 4043, Zhixin Science and Technology Building, Yuelu Science and Technology Industrial Park, Changsha, Hunan Province, No. 152, Bachelor's Street, Yuelu District, Changsha Patentee after: Hunan hande Stirling Instrument Co. Ltd. Address before: 518000 East Second Floor of Meite Building, Ninth District, Liantang Industrial Zone, Luohu District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Quanyuan Instrumentation Equipment Manufacturing Co.,Ltd. |