CN202631018U - Measurement device for measuring gas flow or liquid flow in large circular-section pipeline - Google Patents
Measurement device for measuring gas flow or liquid flow in large circular-section pipeline Download PDFInfo
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- CN202631018U CN202631018U CN 201220313439 CN201220313439U CN202631018U CN 202631018 U CN202631018 U CN 202631018U CN 201220313439 CN201220313439 CN 201220313439 CN 201220313439 U CN201220313439 U CN 201220313439U CN 202631018 U CN202631018 U CN 202631018U
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- pressure
- detector bar
- static pressure
- pipeline
- pressure output
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Abstract
The utility model discloses a measurement device for measuring gas flow or liquid flow in a large circular-section pipeline. The measurement device comprises a straight bar-shaped detecting rod, and the detecting rod is internally provided with an inner chamber with a circular section and an outer chamber with a ring-shaped section; at the front end of the detecting rod, the outer chamber is sealed, and the inner chamber is outwards opened to form a static pressure withdrawing hole; a total pressure withdrawing hole is formed in the wall of the outer chamber; the back end of the detecting rod is connected with a pressure output device, the pressure output device is provided with a static pressure output passageway and a total pressure output passageway, the static pressure output passageway is communicated with the inner chamber of the detecting rod, and the total pressure output passageway is communicated with the outer chamber of the detecting rod. Compared with the prior art, the measurement device is high in measurement precision and easy to install while the measurement requirement of the large circular-section pipeline is met.
Description
Technical field
The utility model belongs to gas, fluid flow test equipment technical field, is specifically related to a kind of measurement mechanism of measuring gas in the pipeline of large-scale circular section or fluid flow.
Background technology
At present, " L " shape skin holder-static pressure type flow measurement device and sensor section are arranged is rhombus, ellipse or circular even speed tube fluid measurement instrument to known total hydrostatic profile fluid measurement instrument.
" L " shape skin holder-static pressure type flow measurement device is general to use two different circular sections of diameter to manage nested manufacturing; Integral body is bent into " L " shape; Inner narrow tube endoporus is over against incoming flow; Be used to measure the fluid stagnation pressure, externally the sidewall appropriate location of the horizontal pipeline section of large diameter pipe is used to measure hydrostatic pressure perpendicular to the tube wall perforate.This measurement mechanism brake forming is difficulty comparatively; " L " type horizontal survey pipeline section must be parallel with incoming flow during installation; And should be coaxial, otherwise will have a strong impact on measuring accuracy with tested pipeline, generally only be applicable to the more dried quiet small bore pipe of fluid media (medium) (D≤200mm).
Though rhombus, ellipse or round section even speed tube measurement mechanism have become series, static pressure takes out the hole site and generally is positioned at incoming flow back or tested pipeline wall, along with the difference of rate of flow of fluid; Because the influence of the toll bar vortex that the sensor measurement tube body is produced; Static pressure is in fluctuation status all the time, influences measuring accuracy, and tested pipeline cross section penetration type is adopted in the installation of this type flow measurement device; Size is big and necessary tailor-made, therefore uses inconvenience.Places such as oil, chemical industry and scientific research press for a kind of installation more convenient, need not separately real fail to be sold at auction fixed, and the higher total static pressure type fluid measurement instrument of measuring accuracy.
Summary of the invention
The purpose of the utility model provides a kind of measurement mechanism of measuring gas in the pipeline of large-scale circular section or fluid flow, and compared with prior art, when satisfying large-scale circular section duct survey demand, measuring accuracy is high, is easy to install.
The technical scheme that the utility model adopted is; A kind of measurement mechanism of measuring gas in the pipeline of large-scale circular section or fluid flow; It is characterized in that, comprise the detector bar of straight-bar shape, it is the outer chamber of annular for circular an inner chamber body and a cross section that the inside of detector bar has a cross section; At the detector bar front end, the outer chamber sealing, inner chamber body is outwards opened and is static pressure taking-up hole; Have stagnation pressure on the exocoel body wall and take out the hole; The rear end of detector bar is connected with the pressure output unit, and the pressure output unit has a static pressure output channel and a stagnation pressure output channel, and the static pressure output channel is connected with the inner chamber body of detector bar, and the stagnation pressure output channel is connected with the outer chamber of detector bar.
The integrated pressure withdrawing device of pressure output unit; The inside of integrated pressure withdrawing device has the interior circular hole and outer circular hole of concentric setting; Also have stagnation pressure delivery outlet and static pressure delivery outlet on the integrated pressure withdrawing device; Interior circular hole is connected with the inner chamber body of detector bar and is connected with the static pressure delivery outlet through the static pressure passage; Outer circular hole is connected with the outer chamber of detector bar and is connected with the stagnation pressure delivery outlet through total pressure passageway, and interior circular hole, static pressure passage and static pressure delivery outlet constitute the static pressure output channel, and outer circular hole, total pressure passageway and stagnation pressure delivery outlet constitute the stagnation pressure output channel.
The static pressure adjusting and shutoff needle-valve that are used to regulate and turn-off the static pressure passage are installed on the integrated pressure withdrawing device, the stagnation pressure adjusting and shutoff needle-valve that are used to regulate and turn-off total pressure passageway are installed on the integrated pressure withdrawing device.
Be connected through the thread seal connector between detector bar and the integrated pressure withdrawing device.
The quantity that stagnation pressure takes out the hole is a plurality of and axially evenly distributing along detector bar.
At the detector bar front end, outer chamber is the sealing semisphere.
The beneficial effect of the utility model is: except that having common advantage such as existing measurement mechanism is in light weight, cost is low, flow resistance is little, its manufacturing, install more simply, and can be applicable to the flow measurement of wider caliber; In addition, the utility model is installed the integrated pressure withdrawing device in the rear end of detector bar, has realized the characteristics of output unit integrated design, can realize the online installation and the maintenance of production run; The service condition of the single-point bernoulli's equation that the more approaching total hydrostatic profile flow measurement device of the utility model measuring principle is relied on, thereby have higher measuring accuracy; Inner inner chamber body and the outer chamber that adopts coaxial setting of detector bar, so antijamming capability and the angle insensitivity of coming flow path direction improved greatly.
Description of drawings
Fig. 1 is the structural representation that the utility model is measured the measurement mechanism of gas in the pipeline of large-scale circular section or fluid flow;
Fig. 2 is the structural representation of the integrated pressure withdrawing device in the utility model.
Wherein, 1. detector bar, 2. stagnation pressure takes out the hole, and 3. static pressure takes out the hole, 4. thread seal connector, 5. stagnation pressure delivery outlet, 6. static pressure delivery outlet, 7. integrated pressure withdrawing device, 8. stagnation pressure is regulated and is turn-offed needle-valve, and 9. static pressure is regulated and is turn-offed needle-valve.
Embodiment
As depicted in figs. 1 and 2, the utility model is measured the measurement mechanism of gas in the pipeline of large-scale circular section or fluid flow, comprises the detector bar 1 of straight-bar shape, and it is the outer chamber of annular for circular an inner chamber body and a cross section that the inside of detector bar 1 has a cross section.At detector bar 1 front end, outer chamber is the sealing semisphere, and inner chamber body is outwards opened and is static pressure taking-up hole 3.Have stagnation pressure on the exocoel body wall and take out hole 2, the quantity that stagnation pressure takes out hole 2 is a plurality of and axially evenly distributing along detector bar 1.The rear end of detector bar 1 is connected with the pressure output unit.The pressure output unit has a static pressure output channel and a stagnation pressure output channel, and the static pressure output channel is connected with the inner chamber body of detector bar 1, and the stagnation pressure output channel is connected with the outer chamber of detector bar 1.
The integrated pressure withdrawing device 7 of pressure output unit.Be connected through thread seal connector 4 between detector bar 1 and the integrated pressure withdrawing device 7.The inside of integrated pressure withdrawing device 7 has the interior circular hole and outer circular hole of concentric setting; Also have stagnation pressure delivery outlet 5 and static pressure delivery outlet 6 on the integrated pressure withdrawing device 7; Interior circular hole is connected with the inner chamber body of detector bar 1 and is connected with static pressure delivery outlet 6 through the static pressure passage, and outer circular hole is connected with the outer chamber of detector bar 1 and is connected with stagnation pressure delivery outlet 5 through total pressure passageway.Interior circular hole, static pressure passage and static pressure delivery outlet 6 constitute the static pressure output channel, and outer circular hole, total pressure passageway and stagnation pressure delivery outlet 5 constitute the stagnation pressure output channel.
The static pressure adjusting and shutoff needle-valve 9 that are used to regulate and turn-off the static pressure passage are installed on the integrated pressure withdrawing device 7, the stagnation pressure adjusting and shutoff needle-valve 10 that are used to regulate and turn-off total pressure passageway are installed on the integrated pressure withdrawing device 7.
When the utility model is installed stagnation pressure is taken out hole 2 over against tested incoming flow.The length L of the detector bar 1 of the utility model can tested pipeline diameter D 1/3～5/6 between select arbitrarily; Quantity and pore size that stagnation pressure takes out hole 2 can determine according to the size of tested pipeline diameter D; But require each stagnation pressure to take out the pore size unanimity in hole 2; And should be between Φ 1～Φ 3, in order to avoid too small causing stopped up or the excessive intensity that influences tested pipeline.
The utility model has adopted the principle of single-point bernoulli's equation; Baroport and tested pipeline dead in line during installation; Flow rate calculation adopts the computing method of circular pipe; Simple in structure in addition, therefore rigidity is strong, in the pipeline of large-scale circular section, installs and not yielding when using, therefore be specially adapted to large-scale circular section pipeline and use.
Claims (6)
1. a measurement mechanism of measuring gas in the pipeline of large-scale circular section or fluid flow is characterized in that comprise the detector bar (1) of straight-bar shape, it is the outer chamber of annular for circular an inner chamber body and a cross section that the inside of said detector bar (1) has a cross section; At said detector bar (1) front end, said outer chamber sealing, said inner chamber body is outwards opened and is static pressure taking-up hole (3); Have stagnation pressure on the said exocoel body wall and take out hole (2); The rear end of said detector bar (1) is connected with the pressure output unit; Said pressure output unit has a static pressure output channel and a stagnation pressure output channel; Said static pressure output channel is connected with the inner chamber body of detector bar (1), and said stagnation pressure output channel is connected with the outer chamber of detector bar (1).
2. according to the measurement mechanism of gas or fluid flow in the pipeline of the large-scale circular section of the described measurement of claim 1; It is characterized in that; The integrated pressure withdrawing device of said pressure output unit (7); The inside of said integrated pressure withdrawing device (7) has the interior circular hole and outer circular hole of concentric setting; Also have stagnation pressure delivery outlet (5) and static pressure delivery outlet (6) on the said integrated pressure withdrawing device (7); Circular hole is connected with the inner chamber body of detector bar (1) and is connected with static pressure delivery outlet (6) through the static pressure passage in said; Said outer circular hole is connected with the outer chamber of detector bar (1) and is connected with stagnation pressure delivery outlet (5) through total pressure passageway, and said interior circular hole, static pressure passage and static pressure delivery outlet (6) constitute the static pressure output channel, and said outer circular hole, total pressure passageway and stagnation pressure delivery outlet (5) constitute the stagnation pressure output channel.
3. according to the measurement mechanism of gas or fluid flow in the pipeline of the large-scale circular section of the described measurement of claim 2; It is characterized in that; The static pressure adjusting and shutoff needle-valve (9) that are used to regulate and turn-off the static pressure passage are installed on the said integrated pressure withdrawing device (7), the stagnation pressure adjusting and shutoff needle-valve (10) that are used to regulate and turn-off total pressure passageway are installed on the said integrated pressure withdrawing device (7).
4. according to the measurement mechanism of gas or fluid flow in claim 2 or the large-scale circular section of the 3 described measurements pipeline, it is characterized in that, be connected through thread seal connector (4) between said detector bar (1) and the integrated pressure withdrawing device (7).
5. according to the measurement mechanism of gas or fluid flow in claim 1, the large-scale circular section of the 2 or 3 described measurements pipeline, it is characterized in that the quantity that said stagnation pressure takes out hole (2) is a plurality of and axially evenly distributing along detector bar (1).
6. according to the measurement mechanism of gas or fluid flow in claim 1, the large-scale circular section of the 2 or 3 described measurements pipeline, it is characterized in that at said detector bar (1) front end, said outer chamber is the sealing semisphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220313439 CN202631018U (en) | 2012-06-29 | 2012-06-29 | Measurement device for measuring gas flow or liquid flow in large circular-section pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220313439 CN202631018U (en) | 2012-06-29 | 2012-06-29 | Measurement device for measuring gas flow or liquid flow in large circular-section pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631018U true CN202631018U (en) | 2012-12-26 |
Family
ID=47384211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220313439 Expired - Fee Related CN202631018U (en) | 2012-06-29 | 2012-06-29 | Measurement device for measuring gas flow or liquid flow in large circular-section pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202631018U (en) |
-
2012
- 2012-06-29 CN CN 201220313439 patent/CN202631018U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20121226 Termination date: 20140629 |
|
| EXPY | Termination of patent right or utility model |