CN202734878U - Water-drop-shaped uniform-velocity-tube flow measuring device and uniform-velocity-tube flow measuring probe used in same - Google Patents

Water-drop-shaped uniform-velocity-tube flow measuring device and uniform-velocity-tube flow measuring probe used in same Download PDF

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Publication number
CN202734878U
CN202734878U CN 201220251794 CN201220251794U CN202734878U CN 202734878 U CN202734878 U CN 202734878U CN 201220251794 CN201220251794 CN 201220251794 CN 201220251794 U CN201220251794 U CN 201220251794U CN 202734878 U CN202734878 U CN 202734878U
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tube flow
flow measurement
velocity
pressure
drainage
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CN 201220251794
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Chinese (zh)
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俞平权
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Boca Measurement and Control Technology (Shanghai) Co., Ltd.
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SHANGHAI BOKA INDUSTRIAL CO LTD
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Abstract

The utility model belongs to the technical field of uniform-velocity-tube flow measuring devices. According to a uniform-velocity-tube flow measuring device, a uniform-velocity-tube flow measuring probe is a four-sided column body; the cross section of the four-sided column body is a tetrahedron body which includes four planes, namely, an incident flow plane, a first drainage plane, a second drainage plane and a reverse flow plane; and the incident flow plane, the first drainage plane, the second drainage plane and the reverse flow plane are all convex plane bodies. Compared with a conventional uniform-velocity-tube flow measuring device, the uniform-velocity-tube flow measuring device provided by the utility model is not easy to scale or block, the impurity adherence is reduced, the deformation resistance capability is improved, the measurement precision is not reduced after being used for a long time, the range ability is wide, the working performance is stable and effective, and the conventional technical defects are overcome.

Description

The velocity averaging tube flow measurement probe of droplet-shaped velocity averaging tube flow measurement device and use thereof
Technical field
The utility model belongs to velocity averaging tube flow measurement device technique field.
Background technology
Various velocity-averaging tube flow sensors are adopted in fluid measurement in a large number in the industry measurement closed conduit at present, and they all are flow velocity and the flows that comes the measuring channel inner fluid by the area velocity method.Its principle is to insert a measuring tube perpendicular to the pipeline radial center axis in being full of the closed conduit of measured medium, and measuring tube is divided into high-pressure chamber and low-pressure chamber.The measuring tube fluoran stream surface has the high pressure pressure port, and the chamber that is attached thereto is high-pressure chamber; Another chamber is low-pressure chamber, and the pressure port that is attached thereto is the low pressure pressure port.When fluid passed through measuring tube, the high-low pressure chamber was respectively obtained a pressure, and two pressure produce pressure differential △ P, utilize bernoulli equation can obtain the flow of measuring media.The deficiency of existing velocity-averaging tube flow sensor: the low pressure pressure port is easily stifled; Range ability is little; Long-term service precision descends.
The utility model content
The purpose of this utility model is exactly the defects that solves prior art, and a kind of less scaling, difficult obstruction, the stable droplet-shaped velocity averaging tube flow measurement device of long-term work are provided.
For reaching above-mentioned purpose, the technical scheme that the utility model is taked is as follows:
A kind of velocity averaging tube flow measurement probe, its main body is the four sides cylinder, characteristics are that the xsect of four sides cylinder is tetrahedron, are respectively fluoran stream surface, the first drainage face, the second drainage face and lee side, and fluoran stream surface, lee side, the first drainage face and the second drainage face are convex body.
Above-mentioned velocity averaging tube flow measurement probe, fluoran stream surface flows to over against measuring media, the arcwall face that its convex shape is preferred 145 °~160 °; Further, its arc length is 40%~60% of probe xsect longitudinal length.
Above-mentioned velocity averaging tube flow measurement probe, its back side is the opposite of fluoran stream surface, the arcwall face that this convex surface is preferred 80 °~120 °; Further, its arc length is 50%~90% of probe xsect longitudinal length.
Above-mentioned velocity averaging tube flow measurement probe, two convex surfaces in addition are the first drainage face and the second drainage face, two drainage faces are 10 °~20 ° identical arcwall faces, 10 °~30 ° of angles; Further, arc length is 1.5~1.8 times of fluoran stream surface arc length.
A kind of velocity averaging tube flow measurement device comprises velocity averaging tube flow measurement probe, high pressure pilot port, low pressure pilot port, is fixed in velocity averaging tube flow measurement probe top and connects contiguous block and the secondary instrument of high-low pressure pilot port, wherein
Be provided with vertical dividing plate in the even speed tube, the fluoran stream surface of dividing plate and velocity averaging tube flow measurement probe forms high-pressure chamber, and high-pressure chamber is communicated with high pressure pilot port;
The lee side of dividing plate and velocity averaging tube flow measurement probe forms low-pressure chamber, and low-pressure chamber is communicated with low pressure pilot port;
High pressure pilot port and low pressure pilot port are fixed in contiguous block, form first passage and second channel by contiguous block respectively, and first passage and second channel are communicated with secondary instrument;
The fluoran stream surface tube wall of velocity averaging tube flow measurement probe is provided with the high pressure pressure port that flows to over against measuring media more than two, joins with high-pressure chamber;
The first drainage face and the second drainage facial canal wall of velocity averaging tube flow measurement probe are provided with low pressure pressure port (1211,1222), and communicate with low-pressure chamber; This low pressure pressure port (1211,1222) is located at before two drainage faces and the lee side connecting portion, the intermediate point after two drainage face center lines;
The low pressure pressure port (1211,1222) in the corresponding same cross section of high pressure pressure port.
Velocity averaging tube flow measurement device of the present utility model is compared with existing velocity averaging tube flow measurement device, less scaling, the difficult obstruction, impurity reduction adheres to, non-deformability improves, the long-term measuring accuracy of using does not descend, range ability is wide, stable work in work is effective, has solved existing technological deficiency.
For clearer explanation velocity averaging tube flow measurement apparatus structure of the present utility model feature, be described in detail below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the even speed tube structural representation with probe for measuring flow
Fig. 2 is velocity averaging tube flow measurement probe cross sectional representation
Fig. 3 is velocity averaging tube flow measurement device schematic diagram
Fig. 4 is the utility model velocity averaging tube flow measurement device principle of work schematic diagram
Embodiment
As shown in Figure 1 and Figure 2, the said velocity averaging tube flow measurement probe 1 of the utility model, its main body is the four sides cylinder, the xsect of four sides cylinder is tetrahedron, be respectively fluoran stream surface 11, the first drainage face 121, the second drainage face 122 and lee side 13, fluoran stream surface 11, lee side 13, the first drainage face 121 and the second drainage face 122 are convex body.Fluoran stream surface 11 flows to over against measuring media, the arcwall face that its convex shape is preferred 145 °~160 °; Further, its arc length is 40%~60% of probe xsect longitudinal length.The back side 13 is the opposite of fluoran stream surface 11, the arcwall face that this convex surface is preferred 80 °~120 °; Further, its arc length is 50%~90% of probe xsect longitudinal length.Two convex surfaces in addition are that the first drainage face 121 and 122, two drainage faces of the second drainage face are 10 °~20 ° identical arcwall faces, 10 °~30 ° of angles; Further, arc length is 1.5~1.8 times of fluoran stream surface 11 arc length.
Such as Fig. 1, Fig. 2 and shown in Figure 3, the said velocity averaging tube flow measurement device of the utility model, comprise above-mentioned velocity averaging tube flow measurement probe 1, high pressure pilot port 2, low pressure pilot port 3, be fixed in velocity averaging tube flow measurement probe top and connect contiguous block 4 and the secondary instrument 6 of high-low pressure pilot port, wherein be provided with vertical dividing plate 8 in the even speed tube 5, dividing plate 8 forms high-pressure chamber 9 with the fluoran stream surface 11 of velocity averaging tube flow measurement probe 1, and high-pressure chamber 9 is communicated with high pressure pilot port 2; Dividing plate 8 forms low-pressure chamber 10 with the lee side 13 of velocity averaging tube flow measurement probe 1, and low-pressure chamber 10 is communicated with low pressure pilot port 3; High pressure pilot port 2 and low pressure pilot port 3 are fixed in contiguous block 4, form first passage 71 and second channel 72 by contiguous block 4 respectively, and first passage 71 and second channel 72 are communicated with secondary instrument 6; Fluoran stream surface 11 tube walls of velocity averaging tube flow measurement probe 1 are provided with the high pressure pressure port 111 that flows to over against measuring media more than two, join with high-pressure chamber 9; The first drainage face 121 and the second drainage face 122 tube walls of velocity averaging tube flow measurement probe 1 are provided with low pressure pressure port 1211,1222, communicate with low-pressure chamber 10; This low pressure pressure port 1211,1222 is located at before two drainage faces and lee side 13 connecting portions, the intermediate point after two drainage face center lines; The low pressure pressure port 1211,1222 in high pressure pressure port 111 corresponding same cross sections.
Such as Fig. 2, shown in Figure 4, the utility model becomes to be similar to the shape in water-drop-shaped cross section with the velocity averaging tube flow measurement probe designs, it is minimum that its streamlined suffered fluid draw power reaches, take lee side and isometric both sides arc connecting portion as point of flow separation, so that the burble point of fluid and probe is fixed, efflux coefficient is constant in a sizable scope.Secondly before the low pressure pressure port is in point of flow separation, the low pressure pressure port is stopped up in the impurity alluvial of having avoided bringing because of eddy current, the low pressure pressure port is positioned at after the arc center line of isometric both sides, then avoided the low pressure pressure port directly to be subject to the high speed impact of measuring media, namely reduced the probability that molecule in the measuring media enters the low pressure pressure port, the bulk strength that has also improved probe has prolonged serviceable life.The simultaneously arc on isometric both sides design, the choked flow effect of even speed tube is increased gradually, the valid circulation area of pipeline dwindles stably, can play certain rectified action, shorten the front flow development length of the required necessity of even speed tube, measuring media also can reach full-blown disturbed flow condition, guarantee measuring accuracy, reduce cost, also reduced adhering to of impurity in the measuring media, guaranteed the stability of long-term use measuring accuracy.
1, streamlined cross-section design, fluid draw power is little;
2, anti-stifled effective;
3, improving bulk strength increases the service life;
4, reduce flow development length, effectively reduce cost;

Claims (9)

1. a velocity averaging tube flow measurement is popped one's head in, main body is the four sides cylinder, it is characterized in that: the xsect of four sides cylinder is tetrahedron, be respectively fluoran stream surface (11), the first drainage face (121), the second drainage face (122) and lee side (13), fluoran stream surface (11), lee side (13), the first drainage face (121) and the second drainage face (122) are convex body.
2. velocity averaging tube flow measurement as claimed in claim 1 is popped one's head in, and it is characterized in that: fluoran stream surface (11) flows to over against measuring media, and its convex shape is 145 °~160 ° arcwall face.
3. velocity averaging tube flow measurement as claimed in claim 2 is popped one's head in, and it is characterized in that: the arc length of fluoran stream surface (11) is 40%~60% of probe xsect longitudinal length.
4. velocity averaging tube flow measurement as claimed in claim 1 is popped one's head in, and it is characterized in that: the back side (13) are the opposite of fluoran stream surface (11), and this convex surface is 80 °~120 ° arcwall face.
5. velocity averaging tube flow measurement as claimed in claim 4 is popped one's head in, and it is characterized in that: the arc length of the back side (13) is 50%~90% of probe xsect longitudinal length.
6. velocity averaging tube flow measurement as claimed in claim 1 is popped one's head in, and it is characterized in that: the first drainage face (121) is 10 °~20 ° identical arcwall faces with the second drainage face (122), 10 °~30 ° of angles.
7. velocity averaging tube flow measurement as claimed in claim 6 is popped one's head in, and it is characterized in that: the arc length of the first drainage face (121) and the second drainage face (122) is 1.5~1.8 times of fluoran stream surface (11) arc length.
8. velocity averaging tube flow measurement device, it is characterized in that: comprise velocity averaging tube flow measurement probe (1), high pressure pilot port (2), low pressure pilot port (3), be fixed in velocity averaging tube flow measurement probe top and connect contiguous block (4) and the secondary instrument (6) of high-low pressure pilot port, wherein
Also be provided with vertical dividing plate (8) in the even speed tube (5), dividing plate (8) forms high-pressure chamber (9) with the fluoran stream surface (11) of velocity averaging tube flow measurement probe (1), and high-pressure chamber (9) is communicated with high pressure pilot port (2);
Dividing plate (8) forms low-pressure chamber (10) with the lee side (13) of velocity averaging tube flow measurement probe (1), and low-pressure chamber (10) is communicated with low pressure pilot port (3);
High pressure pilot port (2) and low pressure pilot port (3) are fixed in contiguous block (4), form first passage (71) and second channel (72) by contiguous block (4) respectively, and first passage (71) and second channel (72) are communicated with secondary instrument (6);
Fluoran stream surface (11) tube wall of velocity averaging tube flow measurement probe (1) is provided with the high pressure pressure port (111) that flows to over against measuring media more than two, joins with high-pressure chamber (9);
The first drainage face (121) and the second drainage face (122) tube wall of velocity averaging tube flow measurement probe (1) are provided with low pressure pressure port (1211,1222), communicate with low-pressure chamber (10), this low pressure pressure port (1211,1222) is located at before two drainage faces and lee side (13) connecting portion, the intermediate point after two drainage face center lines;
The low pressure pressure port (1211,1222) in the corresponding same cross section of high pressure pressure port (111).
9. velocity averaging tube flow measurement device as claimed in claim 8 is characterized in that: velocity averaging tube flow measurement probe (1) is the described velocity averaging tube flow measurement probe of any claim 1-7.
CN 201220251794 2012-05-31 2012-05-31 Water-drop-shaped uniform-velocity-tube flow measuring device and uniform-velocity-tube flow measuring probe used in same Active CN202734878U (en)

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Application Number Priority Date Filing Date Title
CN 201220251794 CN202734878U (en) 2012-05-31 2012-05-31 Water-drop-shaped uniform-velocity-tube flow measuring device and uniform-velocity-tube flow measuring probe used in same

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102721443A (en) * 2012-05-31 2012-10-10 上海博卡实业有限公司 Water drop type constant speed pipe flow measuring device and utilized constant speed pipe flow measuring probe
CN104457861A (en) * 2014-11-27 2015-03-25 中煤科工集团重庆研究院有限公司 Velocity-averaging tube flow meter probe
CN105043481A (en) * 2015-05-04 2015-11-11 大连理工大学 Pentagonal velocity-averaging tube

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102721443A (en) * 2012-05-31 2012-10-10 上海博卡实业有限公司 Water drop type constant speed pipe flow measuring device and utilized constant speed pipe flow measuring probe
CN102721443B (en) * 2012-05-31 2014-01-01 上海博卡实业有限公司 Water drop type constant speed pipe flow measuring device and utilized constant speed pipe flow measuring probe
CN104457861A (en) * 2014-11-27 2015-03-25 中煤科工集团重庆研究院有限公司 Velocity-averaging tube flow meter probe
CN105043481A (en) * 2015-05-04 2015-11-11 大连理工大学 Pentagonal velocity-averaging tube

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GR01 Patent grant
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TR01 Transfer of patent right

Effective date of registration: 20190918

Address after: No. 8, Lane 691, Jianle Road, Luxiang Town, Jinshan District, Shanghai, 201517

Patentee after: Boca Measurement and Control Technology (Shanghai) Co., Ltd.

Address before: 200120, room 1090, 601 Century Avenue, Shanghai, Pudong New Area

Patentee before: Shanghai Boka Industrial Co.,Ltd.