CN203084004U - Plug-in type medium flow velocity sensor with drop-shaped drag reduction function - Google Patents
Plug-in type medium flow velocity sensor with drop-shaped drag reduction function Download PDFInfo
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- CN203084004U CN203084004U CN 201320125458 CN201320125458U CN203084004U CN 203084004 U CN203084004 U CN 203084004U CN 201320125458 CN201320125458 CN 201320125458 CN 201320125458 U CN201320125458 U CN 201320125458U CN 203084004 U CN203084004 U CN 203084004U
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- rod section
- temperature sensor
- drag reduction
- pipe
- conducting tube
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Abstract
The utility model discloses a plug-in type medium flow velocity sensor with a drop-shaped drag reduction function, relates to a plug-in type pitot tube, and aims to solve the problems of high formation rate of eddy current in a pipeline, turbulence of a flow field, interference with the extraction of a differential pressure signal of fluid and increase of transport drag of the fluid, which are caused by the adoption of a cylindrical detection rod for the plug-in type pitot tube. A connecting pipe is connected with a drag reduction measurement rod through a flange. The cross section of each of an upper rod section, a middle rod section, a lower rod section and a tapered section is drop-shaped. The centers of the drag reduction measurement rod and the connecting pipe are provided with a pipe hole along a length direction. A front-end circular flange is arranged on the outer periphery of a total pressure gaining hole, and a rear-end circular flange is arranged on the outer periphery of a static pressure gaining hole. A total pressure conduction pipe, a static pressure conduction pipe and a temperature sensor through pipe are arranged in the pipe hole. The upper ends of the total pressure conduction pipe, the static pressure conduction pipe and the temperature sensor through pipe are arranged outside the pipe hole, and form a psi shape. An optical fiber grating temperature sensor is arranged in the temperature sensor through pipe, and is positioned at the lower end of the temperature sensor through pipe. The plug-in type medium flow velocity sensor is used for measuring the flow of the pipeline.
Description
Technical field
The utility model relates to a kind of insert type pitot tube, is specifically related to a kind of insert type velocity of medium sensor with water droplet shape drag reduction.
Background technology
Because that the pitot tube flow sensor has is simple in structure, be easy to processing, advantage such as easy for installation, with low cost, has wide practical use in fields such as petrochemical industry, metallurgy, electric power, light industrys.The structure of flow sensor also develops into up-to-date straight line measuring staff type by early stage L type, S type, becomes the flow measurement important sensor gradually.
Existing insert type pitot tube adopts cylindrical feeler mostly, cylindrical feeler processing and installation all are easier to, the structure of column type is not optimum low-resistance structure in fluid mechanics, the feeler of column type can produce eddy current, make the flow field disorder, increase the fluid transport resistance, even influence the distribution of the stagnation pressure and the static pressure of pressure port.
The utility model content
The purpose of this utility model is to adopt cylindrical feeler in order to solve existing insert type pitot tube, cause producing in the pipeline eddy current, make the flow field disorder, disturb the fluid differential pressure signal extraction, increase the fluid transport resistance, influence the stagnation pressure of pressure port and the problem of static pressure distribution, a kind of insert type velocity of medium sensor with water droplet shape drag reduction is provided.
The utility model comprises the drag reduction measuring staff, take over, the stagnation pressure conducting tube, the static pressure conducting tube, the temperature sensor siphunculus, the front end round flange, rear end round flange and fiber-optical grating temperature sensor, described drag reduction measuring staff is followed successively by upper flange from top to bottom, upper rod section, middle rod section, lower rod section and conical section, the lower end of taking over is provided with lower flange, adapter is arranged on the upper end of drag reduction measuring staff, and upper flange adopts Connection Element to be connected with lower flange, upper rod section, middle rod section, the xsect of lower rod section and conical section is water droplet shape, the center of drag reduction measuring staff and adapter is provided with pore along its length, the upper flange of pore correspondence is a flange section guide hole, the upper rod section of pore correspondence is the upper conduit hole, the middle rod section of pore correspondence is middle guide hole, the lower rod section of pore correspondence is the downcomer hole, the conical section of pore correspondence is a gauge hole, the bottom of lower rod section is provided with the pressure port vertical with the downcomer hole, the pressure port of lower rod section front end is a total pressure tapping, the pressure port of lower rod section rear end is a static pressure tapping, the front end round flange is arranged on the outer periphery of total pressure tapping, the rear end round flange is arranged on the outer periphery of static pressure tapping, the stagnation pressure conducting tube, static pressure conducting tube and temperature sensor siphunculus are installed in the pore, and the lower end of stagnation pressure conducting tube passes from total pressure tapping, the lower end of static pressure conducting tube passes from static pressure tapping, gauge hole is passed in the lower end of temperature sensor siphunculus, the stagnation pressure conducting tube, the upper end of static pressure conducting tube and temperature sensor siphunculus is arranged on the outside of pore and is " ψ " shape and is provided with, and fiber-optical grating temperature sensor is arranged in the temperature sensor siphunculus and is positioned at the lower end of temperature sensor siphunculus.
The utility model compared with prior art has following beneficial effect:
One, the utility model adopts water droplet shape drag reduction measuring staff, and it is little to the resistance of flow media to compare cylindrical measuring staff; Therefore, water droplet shape drag reduction measuring staff can reduce the turbulent flow of measuring staff, reduces flow field resistance and pressure interference, reduces medium and transports energy consumption.The outer end that the outer end of total pressure tapping is provided with front end round flange, static pressure tapping is provided with the rear end round flange, makes the port of total pressure tapping and static pressure tapping not be subjected to the pressure noise of asymmetric interface and curved surface; Effectively the shielding mean pressure disturbs the measurement of stagnation pressure, makes the pressure passage effectively transmit the pressure distribution of pipeline central point, and makes pressure reduction more approach true flow field state.
Two, the utility model can reduce the influence that baroport is subjected to the measuring staff eddy current, promptly reduces the disturbance of flow field noise to pressure signal.
Three, the lower end with the drag reduction measuring staff is designed to conical section, conical section has prolonged the heat exchanger time of fluid and fiber-optical grating temperature sensor, fiber-optical grating temperature sensor is fully contacted with fluid, carry out heat interchange effectively, make that thermometric result is more accurate.
Four, between stagnation pressure conducting tube and static pressure conducting tube, arrange small and exquisite fiber-optical grating temperature sensor, the many reference amounts conversion of transmitter is achieved, help the accurate extraction of pipeline center's temperature compensation signal.
Five, the temperature resolution of the utility model sensor is 0.1 ℃, and the temperature range of sensor is :-50 ℃～300 ℃.
Six, the utility model is easy for installation, degree of accuracy is high, is suitable for the pipeline of various sizes, and high performance temperature sensor makes the utility model also be suitable for the high temperature fluid measurement that traditional method is difficult to adapt to.
Description of drawings
Fig. 1 is a front view of the present utility model, and Fig. 2 is the A-A cut-open view of Fig. 1, and Fig. 3 is the B-B cut-open view of Fig. 2, and Fig. 4 is the C-C cut-open view of Fig. 2, and Fig. 5 is user mode figure of the present utility model (mark 10 is workpiece among the figure).
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1～Fig. 4, present embodiment comprises drag reduction measuring staff 1, take over 3, stagnation pressure conducting tube 4, static pressure conducting tube 5, temperature sensor siphunculus 6, front end round flange 7, rear end round flange 8 and fiber-optical grating temperature sensor 9, described drag reduction measuring staff 1 is followed successively by upper flange 1-1 from top to bottom, upper rod section 1-2, middle rod section 1-3, lower rod section 1-4 and conical section 1-5, the lower end of adapter 3 is provided with lower flange 3-1, adapter 3 is arranged on the upper end of drag reduction measuring staff 1, and upper flange 1-1 adopts Connection Element to be connected with lower flange 3-1, upper rod section 1-2, middle rod section 1-3, the xsect of lower rod section 1-4 and conical section 1-5 is water droplet shape, can adjust the cross section thickness of drag reduction measuring staff 1 and the tube wall size of drag reduction measuring staff 1 according to the practical structure requirement of strength, the water droplet tee section can effectively reduce the resistance of 1 pair of pipeline fluid of drag reduction measuring staff, the center of drag reduction measuring staff 1 and adapter 3 is provided with pore 2 along its length, the upper flange 1-1 of pore 2 correspondences is flange section guide hole 2-1, the upper rod section 1-2 of pore 2 correspondences is upper conduit hole 2-2, the middle rod section 1-3 of pore 2 correspondences is middle guide hole 2-3, the lower rod section 1-4 of pore 2 correspondences is downcomer hole 2-4, the conical section 1-5 of pore 2 correspondences is gauge hole 2-5, the bottom of lower rod section 1-4 is provided with the vertical pressure port with downcomer hole 2-4, the pressure port of lower rod section 1-4 front end (being water droplet shape front end) is total pressure tapping 1-4-1, the pressure port of lower rod section 1-4 rear end (being water droplet shape rear end) is static pressure tapping 1-4-2, front end round flange 7 is arranged on the outer periphery of total pressure tapping 1-4-1, rear end round flange 8 is arranged on the outer periphery of static pressure tapping 1-4-2, the outer wall junction of the outer wall of round flange and drag reduction measuring staff 1 is the transition of arc, and the transition of arc can reduce the disorder of fluid.Stagnation pressure conducting tube 4, static pressure conducting tube 5 and temperature sensor siphunculus 6 are installed in the pore 2, and the lower end of stagnation pressure conducting tube 4 passes from total pressure tapping 1-4-1, the lower end of static pressure conducting tube 5 passes from static pressure tapping 1-4-2, gauge hole 2-5 is passed in the lower end of temperature sensor siphunculus 6, the upper end of stagnation pressure conducting tube 4, static pressure conducting tube 5 and temperature sensor siphunculus 6 is arranged on the outside of pore 2 and is " ψ " shape and is provided with, and fiber-optical grating temperature sensor 9 is arranged in the temperature sensor siphunculus 6 and is positioned at the lower end of temperature sensor siphunculus 6.Water droplet shape measuring staff can adopt method processing and fabricatings such as die casting, punching press.
Embodiment two: present embodiment is described in conjunction with Fig. 3 and Fig. 4, the cross-sectional area of the lower rod section 1-4 of present embodiment is less than the cross-sectional area of upper rod section 1-2, the upper end cross-sectional area of middle rod section 1-3 equates that with the cross-sectional area of upper rod section 1-2 the lower end cross-sectional area of middle rod section 1-3 equates with the upper end cross-sectional area of lower rod section 1-4.Shorter in measuring staff length, structural strength is required under the lower situation, but the cross sectional dimensions of 1-2,1-3,1-4 section can be consistent.Other composition and annexation are identical with embodiment one.
Embodiment three: in conjunction with Fig. 2 present embodiment is described, the stagnation pressure conducting tube 4 and the static pressure conducting tube 5 of present embodiment are tangent setting in middle rod section 1-3.Other composition and annexation are identical with embodiment one or two.
Principle of work of the present utility model: before the measurement, earlier with stagnation pressure conducting tube 4, the output terminal of static pressure conducting tube 5 and temperature sensor siphunculus 6 is connected with valve group 11, valve group 11 is connected with differential pressure transmitter 12, differential pressure transmitter 12 is a pressure, the integrated transmitter of differential pressure, differential pressure transmitter 12 is connected with flow integrator 13, flow integrator 13 is connected with supervisory control comuter 14, fiber-optical grating temperature sensor 9 output stagnation pressure signals, static pressure signal and pipeline center's optical fiber grating temperature signal, carry out parameter change by differential pressure transmitter 12, transmitter output optical fibre signal and 4～20mA signal to integrating instrument 13 carries out flow accumulation and correction, instantaneous delivery, integrated flux, temperature, pressure, signals such as differential pressure are shown by computing machine 14, also can carry out early warning to abnormal signals such as measuring staff pressure passage obstructions.
Claims (3)
1. insert type velocity of medium sensor with water droplet shape drag reduction, described sensor comprises drag reduction measuring staff (1), take over (3), stagnation pressure conducting tube (4), static pressure conducting tube (5), temperature sensor siphunculus (6), front end round flange (7), rear end round flange (8) and fiber-optical grating temperature sensor (9), it is characterized in that: described drag reduction measuring staff (1) is followed successively by upper flange (1-1) from top to bottom, upper rod section (1-2), middle rod section (1-3), lower rod section (1-4) and conical section (1-5), the lower end of taking over (3) is provided with lower flange (3-1), take over the upper end that (3) are arranged on drag reduction measuring staff (1), and upper flange (1-1) adopts Connection Element to be connected with lower flange (3-1), upper rod section (1-2), middle rod section (1-3), the xsect of lower rod section (1-4) and conical section (1-5) is water droplet shape, the center of drag reduction measuring staff (1) and adapter (3) is provided with pore (2) along its length, the upper flange (1-1) that pore (2) is corresponding is a flange section guide hole (2-1), the upper rod section (1-2) that pore (2) is corresponding is upper conduit hole (2-2), the middle rod section (1-3) that pore (2) is corresponding is middle guide hole (2-3), the lower rod section (1-4) that pore (2) is corresponding is downcomer hole (2-4), the conical section (1-5) that pore (2) is corresponding is gauge hole (2-5), the bottom of lower rod section (1-4) is provided with and the vertical pressure port in downcomer hole (2-4), the pressure port of lower rod section (1-4) front end is total pressure tapping (1-4-1), the pressure port of lower rod section (1-4) rear end is static pressure tapping (1-4-2), (7 are arranged on the outer periphery of total pressure tapping (1-4-1) to the front end round flange, rear end round flange (8) is arranged on the outer periphery of static pressure tapping (1-4-2), stagnation pressure conducting tube (4), static pressure conducting tube (5) and temperature sensor siphunculus (6) are installed in the pore (2), and the lower end of stagnation pressure conducting tube (4) passes from total pressure tapping (1-4-1), the lower end of static pressure conducting tube (5) passes from static pressure tapping (1-4-2), gauge hole (2-5) is passed in the lower end of temperature sensor siphunculus (6), stagnation pressure conducting tube (4), the upper end of static pressure conducting tube (5) and temperature sensor siphunculus (6) is arranged on the outside of pore (2) and is " ψ " shape and is provided with, and fiber-optical grating temperature sensor (9) is arranged in the temperature sensor siphunculus (6) and is positioned at the lower end of temperature sensor siphunculus (6).
2. according to the described insert type velocity of medium sensor of claim 1 with water droplet shape drag reduction, it is characterized in that: the cross-sectional area of described lower rod section (1-4) is less than the cross-sectional area of upper rod section (1-2), the upper end cross-sectional area of middle rod section (1-3) equates that with the cross-sectional area of upper rod section (1-2) the lower end cross-sectional area of middle rod section (1-3) equates with the upper end cross-sectional area of lower rod section (1-4).
3. according to claim 1 or 2 described insert type velocity of medium sensors with water droplet shape drag reduction, it is characterized in that: described stagnation pressure conducting tube (4) is tangent setting in middle rod section (1-3) with static pressure conducting tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320125458 CN203084004U (en) | 2013-03-19 | 2013-03-19 | Plug-in type medium flow velocity sensor with drop-shaped drag reduction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320125458 CN203084004U (en) | 2013-03-19 | 2013-03-19 | Plug-in type medium flow velocity sensor with drop-shaped drag reduction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203084004U true CN203084004U (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320125458 Expired - Fee Related CN203084004U (en) | 2013-03-19 | 2013-03-19 | Plug-in type medium flow velocity sensor with drop-shaped drag reduction function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203084004U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2542855A (en) * | 2015-10-02 | 2017-04-05 | Smart Fibres Ltd | Monitoring probe |
| CN113238074A (en) * | 2021-05-18 | 2021-08-10 | 贵州电网有限责任公司 | Pitot tube wind speed and direction measuring method based on sextant method |
-
2013
- 2013-03-19 CN CN 201320125458 patent/CN203084004U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2542855A (en) * | 2015-10-02 | 2017-04-05 | Smart Fibres Ltd | Monitoring probe |
| GB2542855B (en) * | 2015-10-02 | 2017-10-11 | Smart Fibres Ltd | Monitoring probe |
| CN113238074A (en) * | 2021-05-18 | 2021-08-10 | 贵州电网有限责任公司 | Pitot tube wind speed and direction measuring method based on sextant method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20210319 |