CN1333237C - Uniform speed flow sensor having flow signal amplifying function - Google Patents
Uniform speed flow sensor having flow signal amplifying function Download PDFInfo
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- CN1333237C CN1333237C CNB2004100730157A CN200410073015A CN1333237C CN 1333237 C CN1333237 C CN 1333237C CN B2004100730157 A CNB2004100730157 A CN B2004100730157A CN 200410073015 A CN200410073015 A CN 200410073015A CN 1333237 C CN1333237 C CN 1333237C
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- speed
- raising plate
- rod
- signal amplifying
- static pressure
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Abstract
The present invention relates to a device used for measuring flow quantity of liquid, particularly to a constant speed flow quantity sensor with a flow quantity signal amplification function. The present invention overcomes the problems that a measurement signal is small, the sensitivity is low, and the measurement signal fluctuates existing in the prior art. In order to solve the problems existing in the prior art, the present invention has the technical scheme that the constant speed flow quantity sensor with a flow quantity signal amplification function comprises a measurement rod 1 on which a pressure port of total pressure and a pressure port of static pressure are arranged. The present invention is characterized in that the lateral surface of a plane surface which is symmetrical to the measurement rod 1 is provided with a liquid accelerating speed raising plate 2; a pressure area of static pressure can be formed between the measurement rod 1 and the liquid accelerating speed raising plate 2; the speed raising plate 2 is arranged at the outer side of the measurement rod 1 along the long direction of the measurement rod 1 by a locating piece 3.
Description
Affiliated technical field:
The present invention relates to a kind of device that is used to measure fluid flow, be specifically related to a kind of uniform speed flow sensor with flow signal amplifying function.
Background technology:
Because when fluid flowed along the excellent lateral surface of measurement, flow velocity increased, static pressure reduces, and the sound pressure reduction of generation depends on flow velocity and the excellent profile of measurement.When fluid velocity was less than normal, existing product existed the problem that measuring-signal is less, sensitivity is low; If the flow field instability can cause the fluctuation of measuring-signal.
Summary of the invention:
The present invention will overcome that the measuring-signal that prior art exists is less, sensitivity is low, the problem of measuring-signal fluctuation.
For solving the problem that prior art exists, technical scheme of the present invention is, a kind of uniform speed flow sensor with flow signal amplifying function, comprise and measure rod 1, measure rod 1 and be provided with total pressure tapping and static pressure tapping, its special character is: be provided with and measure between the rod 1 in the side of the symmetrical plane of measuring rod 1 and can form the speed-raising plate 2 that static pressure pressure district fluid quickens, this speed-raising plate 2 by keeper 3 in the outside of measuring rod 1, be provided with along its length direction.
Two sides of the symmetrical plane of above-mentioned measurement rod 1 are provided with speed-raising plate 2, and speed-raising plate 2 is symmetrical arranged.Unstable or when coming the flow path direction skew at incoming flow, better effects if.
The inboard of above-mentioned speed-raising plate 2 xsects is streamlined for what protrude, and described streamlined circular arc line, oval camber line, the camber line of can comprising adds straight line or broken line.Can effectively promote static pressure district fluid velocity, be specially adapted to the measurement rod 1 that static pressure tapping is provided with in the side.
The inboard of above-mentioned speed-raising plate 2 xsects is the plane.Be applicable to the measurement rod 1 that static pressure tapping is provided with in the side.
The inboard of above-mentioned speed-raising plate 2 xsects is the convex-concave build-up curve, and its array mode is an intermediate recess, and protrude at two ends.Be useful in the measurement rod 1 that static pressure tapping is provided with in countercurrent direction one side.
The outside of above-mentioned speed-raising plate 2 xsects is the streamlined of straight line or protrusion.
Above-mentioned static pressure tapping is positioned at speed-raising plate 2 and measures the minimum static pressure district that rod 1 constitutes.The differential pressure signal maximum.
Above-mentioned speed-raising plate 2 can be solid, also can be hollow.The difference of job operation is depended in their employing.
Above-mentioned speed-raising plate 2 is divided into one section or two sections along measuring excellent 1 length direction.One section mostly be whole and be provided with or the stage casing is provided with measured excellent 1 size when big, and segmentation setting can be reduced the difficulty of speed-raising plate 2 whole processing.
The corresponding setting in the position of above-mentioned speed-raising plate 2 with static pressure tapping.
Compared with prior art, advantage of the present invention:
1. measuring-signal is big, and sensitivity improves greatly: the present invention makes static pressure district flow velocity significantly improve under flow the same terms, and differential pressure signal promotes at double, makes measurement lower limit downward, and it has successfully solved how to improve the technical matters of measuring sensitivity under the low wind speed.Our experiments show that its flow signal (differential pressure) increases substantially than prior art, measure highly sensitively, obviously be better than the even speed tube product sensor of external import.
2. good stability: when coming flow path direction that skew or flow field less stable are arranged, can play the current stabilization effect, reduce or eliminate the fluctuation of measuring-signal to the fluid that enters sensor.
3. applied widely: the pipe diameter wide ranges that the present invention was suitable for; The fluid velocity wide ranges that is suitable for for example can be used in wind speed V=4～90m/s scope; And this sensor can be connected with various forms of connectors, is suitable for using under different pipelines, gas with various, different environmental baseline.
Description of drawings:
Fig. 1 is the cross section structure synoptic diagram of the embodiment of the invention 1;
Fig. 2 is the cross section structure synoptic diagram of the embodiment of the invention 2;
Fig. 3 is the cross section structure synoptic diagram of the embodiment of the invention 3;
Fig. 4 is the cross section structure synoptic diagram of the embodiment of the invention 4;
Fig. 5 is the cross section structure synoptic diagram of the embodiment of the invention 5;
Fig. 6 is the cross section structure synoptic diagram of another kind of sensor;
Fig. 7 be Fig. 6 A in a kind of structural representation;
Fig. 8 be Fig. 6 A in another kind of structural representation;
Fig. 9 be Fig. 6 A in the third structural representation.
Description of reference numerals is as follows:
1-measures rod, the 2-plate that raises speed, 3-keeper, 4-step.
Embodiment:
Uniform speed flow sensor with flow signal amplifying function involved in the present invention, comprise the known measurement rod 1 that is provided with total pressure tapping and static pressure tapping, the present invention is provided with and measures between excellent 1 in the side of the symmetrical plane of measuring rod 1 and can form the speed-raising plate 2 that static pressure pressure district fluid quickens, and said speed-raising plate 2 passes through keeper 3 in the outside of measuring rod 1, along its length direction setting.
Product sensor of the present invention can connect with various types of connectors, forms complete uniform speed flow measurement mechanism.Said connector can be the flange form terminal pad, and the surface also is equipped with two adapters and chews thereon: total aluminium hydraulic pressed connecting pipe is chewed to take over static pressure and is chewed.
To specifically measure rod 1 setting of being done at speed-raising plate 2 in all kinds below is described in detail.
Embodiment 1:
Referring to Fig. 1, above-mentioned measurement rod 1 is that Verabar is bullet-headed, and two sides of its symmetrical plane are provided with speed-raising plate 2, and speed-raising plate 2 is symmetrical arranged, and the projection of speed-raising plate 2 on measurement rod 1 covers measures on the rod 1.The inboard in said speed-raising plate 2 cross sections is for protruding the combination of camber line and straight line, and straight-line segment is parallel to the surface of measuring static pressure tapping district on excellent 1, makes static pressure tapping be positioned at speed-raising plate 2 and the minimum static pressure district of measuring rod 1 formation; The outside in said speed-raising plate 2 cross sections is a straight line.
Following embodiment 2～5 will describe the measurement rod 1 that the static pressure pressure tappings is positioned at countercurrent direction one side:
Embodiment 2:
Referring to Fig. 2: above-mentioned measurement rod 1 is a diamond, two sides of its symmetrical plane are provided with speed-raising plate 2, speed-raising plate 2 is symmetrical arranged, speed-raising plate 2 has covered measurement rod 1 in the projection of measuring on the rod 1, and the plate 2 that raises speed prolongs a little in a side of static pressure tapping, makes static pressure tapping be positioned at speed-raising plate 2 and the minimum static pressure district of measuring rod 1 formation.The inboard of said speed-raising plate 2 xsects is streamlined corresponding to the indent of measuring excellent 1 surface, this is streamlined can be made of the protrusion camber line at two ends, middle indent camber line and two sections straight lines between the camber line, and the outside of said speed-raising plate 2 xsects be corresponding with its inboard streamlined.
Embodiment 3:
Referring to Fig. 3, above-mentioned measurement rod 1 is circular, two sides of its symmetrical plane are provided with speed-raising plate 2, speed-raising plate 2 is symmetrical arranged, speed-raising plate 2 has covered measurement rod 1 in the projection section of measuring on the rod 1, the plate 2 that raises speed prolongs a little in a side of static pressure tapping, makes static pressure tapping be positioned at speed-raising plate 2 and the minimum static pressure district of measuring rod 1 formation.The inboard of said speed-raising plate 2 xsects is the streamlined of three sections camber lines formations, and three sections camber lines are recessed in the middle of being, two ends are protruding, and the outside of said speed-raising plate 2 xsects is that one section camber line constitutes.
Embodiment 4:
Referring to Fig. 4.Above-mentioned measurement rod 1 is T shape 485 Annubar types, and two sides of its symmetrical plane are provided with speed-raising plate 2, and speed-raising plate 2 is symmetrical arranged, and the projection of speed-raising plate 2 drops on measures on the rod 1, and its incoming flow one side prolongs a little.Said speed-raising plate 2 is board-like, and there is very short protrusion camber line at inboard two ends.Constitute front wide and rear narrow angle between the speed-raising plate 2, can form static pressure pressure district fluid between making speed-raising plate 2 and measuring excellent 1 and quicken.
Embodiment 5:
Referring to Fig. 5.The measurement rod 1 that is adopted in the present embodiment only is provided with static pressure tapping in a side for oval on it.Said speed-raising plate 2 is one, and it is arranged at a side of the measurement rod 1 that is provided with baroport.The inboard circular arc line for protruding in the cross section of said speed-raising plate 2, the outside is a straight line.
To be described by the measurement rod 1 of 6～8 pairs of another kind of forms of embodiment below.This measures rod 1 bent stagnation pressure-static tube composition, and said stagnation pressure-static tube cross section is " bullhead " shape.Stagnation pressure tube 11 and static tube 15 joints form step 4.Static pressure tapping is arranged on the both sides of measuring rod 1.Said speed-raising plate 2 is arranged on the outside of measuring rod 1 by keeper 3.
Embodiment 6:
Referring to Fig. 6 and Fig. 7, to measure rod 1 and be provided with six groups of stagnation pressures, static pressure pressure point, total pressure tapping and static pressure tapping on every group of stagnation pressure, the static pressure pressure point are positioned on the same cross section.These two sides measuring excellent 1 symmetrical plane are provided with 2, two speed-raisings of speed-raising plate plate 2 and are symmetrical arranged, and its projection covers on the whole measurement rod 1.The inboard in said speed-raising plate 2 cross sections is to the circular arc line of measuring rod 1 surface protrusion, and the inner distance in cross section makes static pressure tapping be positioned at speed-raising plate 2 and the minimum static pressure district of measuring rod 1 formation in step 4 place's minimums; The outside in said speed-raising plate 2 cross sections is a straight line.
Embodiment 7:
Referring to Fig. 6 and Fig. 8, measures rod 1 and be provided with six total pressure tappings, but total pressure tapping is provided with the position with embodiment 6, and static pressure tapping only in the stage casing of measuring rod 1, press close to step 4 places three places be set.These two sides measuring excellent 1 symmetrical plane are provided with the stage casing that 2, two speed-raisings of speed-raising plate plate 2 is symmetricly set in the static pressure tapping place.Said speed-raising plate 2 cross sections are identical with embodiment 6.
Embodiment 8:
Referring to Fig. 6 and Fig. 9, measure rod 1 and be provided with six groups of stagnation pressures, static pressure pressure point.These two sides measuring excellent 1 symmetrical plane are provided with speed-raising plate 2, and the speed-raising plate 2 of each side is divided into two sections, corresponds respectively to static pressure tapping and is symmetrical arranged.Said speed-raising plate 2 cross sections are identical with embodiment 6.
Embodiment 6～8 said one section or two-part structure can be continued to use superincumbent any and measure on the rod 1.
In sum, the present invention is the position of determining speed-raising plate 2 according to the position of static pressure tapping, forms static pressure pressure district fluid between making speed-raising plate 2 and measuring excellent 1 and quickens, and it is minimum that static pressure reaches.A kind of like this proposition of theory is unprecedented, but that its embodiment can have is multiple, above the described scheme of embodiment be not to be the exhaustive of various schemes, it can also have a lot of variations.
Claims (10)
1, a kind of uniform speed flow sensor with flow signal amplifying function, comprise and measure rod (1), measure rod (1) and be provided with total pressure tapping and static pressure tapping, it is characterized in that: be provided with and measure the speed-raising plate (2) that can form the fluid acceleration of static pressure pressure district between the rod (1) in the side of the symmetrical plane of measuring rod (1), this speed-raising plate (2) passes through keeper (3) in the outside of measuring rod (1), along its length direction setting.
2, a kind of uniform speed flow sensor with flow signal amplifying function as claimed in claim 1 is characterized in that: described two sides measuring the symmetrical plane of rod (1) are provided with speed-raising plate (2), and speed-raising plate (2) is symmetrical arranged.
3, a kind of uniform speed flow sensor as claimed in claim 2 with flow signal amplifying function, it is characterized in that: the inboard of described speed-raising plate (2) xsect is streamlined for what protrude, and described streamlined circular arc line, oval camber line, the camber line of comprising adds straight line or broken line.
4, a kind of uniform speed flow sensor with flow signal amplifying function as claimed in claim 2 is characterized in that: the inboard of described speed-raising plate (2) xsect is the plane.
5, a kind of uniform speed flow sensor with flow signal amplifying function as claimed in claim 2 is characterized in that: the inboard of described speed-raising plate (2) xsect is the convex-concave build-up curve, and its array mode is an intermediate recess, and protrude at two ends.
6, as claim 2,3, the described a kind of uniform speed flow sensor with flow signal amplifying function of 4 or 5 arbitrary claims, it is characterized in that: described static pressure tapping is positioned at speed-raising plate (2) and measures the minimum static pressure district that rod (1) constitutes.
7, a kind of uniform speed flow sensor with flow signal amplifying function as claimed in claim 6 is characterized in that: the outside of described speed-raising plate (2) xsect is the streamlined of straight line or protrusion.
8, a kind of uniform speed flow sensor with flow signal amplifying function as claimed in claim 7, it is characterized in that: described speed-raising plate (2) is solid or hollow.
9, a kind of uniform speed flow sensor with flow signal amplifying function as claimed in claim 8 is characterized in that: described speed-raising plate (2) is divided into one section or two sections along measuring rod (1) length direction.
10, a kind of uniform speed flow sensor with flow signal amplifying function as claimed in claim 9 is characterized in that: the corresponding setting with static pressure tapping in the position of described speed-raising plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100730157A CN1333237C (en) | 2004-08-20 | 2004-08-20 | Uniform speed flow sensor having flow signal amplifying function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100730157A CN1333237C (en) | 2004-08-20 | 2004-08-20 | Uniform speed flow sensor having flow signal amplifying function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1737505A CN1737505A (en) | 2006-02-22 |
| CN1333237C true CN1333237C (en) | 2007-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100730157A Expired - Fee Related CN1333237C (en) | 2004-08-20 | 2004-08-20 | Uniform speed flow sensor having flow signal amplifying function |
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| Country | Link |
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| CN (1) | CN1333237C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105628969B (en) * | 2015-12-28 | 2018-11-23 | 北京博希格动力技术有限公司 | Small bore fairing aerofoil profile air velocity transducer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56164960A (en) * | 1980-05-23 | 1981-12-18 | Hitachi Ltd | 1-hole pitot tube device |
| CN85204529U (en) * | 1985-11-02 | 1986-06-18 | 重庆工业自动化仪表研究所 | Uniform speed tube flowmeter working at a large differential pressure |
| US4768386A (en) * | 1986-08-14 | 1988-09-06 | Cambridge Filter Corp. | Air pressure measurement element and system incorporating same |
| US5493512A (en) * | 1991-01-22 | 1996-02-20 | Centre National De La Recherche Scientifique (Cnrs) | Method and apparatus for measuring unsteady flow velocity |
| JPH09222346A (en) * | 1996-02-19 | 1997-08-26 | Mitsubishi Heavy Ind Ltd | Flow rate measuring device utilizing duct reinforcement |
| CN1321239A (en) * | 1999-08-05 | 2001-11-07 | 迪特里奇标准公司 | Noise reducing differential pressure measurement probe |
| CN2736739Y (en) * | 2004-08-20 | 2005-10-26 | 温汉璋 | Constant speed flow sensor with flow signal amplification function |
-
2004
- 2004-08-20 CN CNB2004100730157A patent/CN1333237C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56164960A (en) * | 1980-05-23 | 1981-12-18 | Hitachi Ltd | 1-hole pitot tube device |
| CN85204529U (en) * | 1985-11-02 | 1986-06-18 | 重庆工业自动化仪表研究所 | Uniform speed tube flowmeter working at a large differential pressure |
| US4768386A (en) * | 1986-08-14 | 1988-09-06 | Cambridge Filter Corp. | Air pressure measurement element and system incorporating same |
| US5493512A (en) * | 1991-01-22 | 1996-02-20 | Centre National De La Recherche Scientifique (Cnrs) | Method and apparatus for measuring unsteady flow velocity |
| JPH09222346A (en) * | 1996-02-19 | 1997-08-26 | Mitsubishi Heavy Ind Ltd | Flow rate measuring device utilizing duct reinforcement |
| CN1321239A (en) * | 1999-08-05 | 2001-11-07 | 迪特里奇标准公司 | Noise reducing differential pressure measurement probe |
| CN2736739Y (en) * | 2004-08-20 | 2005-10-26 | 温汉璋 | Constant speed flow sensor with flow signal amplification function |
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|---|---|
| CN1737505A (en) | 2006-02-22 |
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