CN204388981U - The high-performance fairing of critical flow sonic nozzle - Google Patents
The high-performance fairing of critical flow sonic nozzle Download PDFInfo
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- CN204388981U CN204388981U CN201520015264.4U CN201520015264U CN204388981U CN 204388981 U CN204388981 U CN 204388981U CN 201520015264 U CN201520015264 U CN 201520015264U CN 204388981 U CN204388981 U CN 204388981U
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Abstract
The utility model discloses a kind of high-performance fairing of critical flow sonic nozzle.It comprises the metering pipeline for connecting measured stream gauge, metering pipeline has a critical flow nozzle, before being positioned at critical flow nozzle rectification sub-prime and No. two rectification sub-primes are provided with in metering pipeline, be provided with a Temperature T between a rectification sub-prime and No. two rectification sub-primes, described No. two rectification sub-prime rears are provided with a pressure transmission device P.After adopting above-mentioned structure, on the one hand, a rectification sub-prime solves the heat of fluid flowing generation in pipeline to the impact of temperature, ensure that the homogeneous temperature before critical flow sonic nozzle, in addition on the one hand, No. two rectification sub-primes solve the instability of the fluid caused because of the use of temperature transmitter, again on the one hand, the pressure transmission device installed does not affect air-flow, flowing field stability before utilizing two rectification sub-primes to improve high precision critical flow sonic nozzle, ensure that the even of the stable of gas medium and temperature.
Description
Technical field
The utility model relates to gas flowfield rectifier structure in a kind of circular pipe, in particular to a kind of can adjust heavy caliber, pin-point accuracy sonic nozzle before pipe flow field stablize, the high-performance fairing of equally distributed critical flow sonic nozzle, belong to flow metering technical field.
Background technology
When gas flow instrument is examined and determine, during the instrument calibration of particularly heavy caliber, large discharge, whether the flow field before high precision critical flow sonic nozzle stable, evenly, concern the correctness in verification result; Therefore before air-flow flows to nozzle, usually by fairing, air-flow is adjusted, current widespread use be use longer front straight length or use rectification sub-prime to form rectification pipeline section, traditional this structure is due to the structural limitations of Temperature, solve only the problem of non-uniform of temperature before nozzle, do not consider the interference that temperature transmitter convection cell is stable.
Summary of the invention
The technical problems to be solved in the utility model is to provide one can to improve before nozzle smooth stability in pipe, ensures the high-performance fairing of the critical flow sonic nozzle of the stable of gas medium and homogeneous temperature.
In order to solve the problems of the technologies described above, the high-performance fairing of critical flow sonic nozzle of the present utility model, comprise the metering pipeline for connecting measured stream gauge, metering pipeline has a critical flow nozzle, before being positioned at critical flow nozzle rectification sub-prime and No. two rectification sub-primes are provided with in metering pipeline, be provided with a Temperature T between a rectification sub-prime and No. two rectification sub-primes, described No. two rectification sub-prime rears are provided with a pressure transmission device P.
A described rectification sub-prime and No. two rectification sub-primes are two cellular rectification sub-primes.
A described rectification sub-prime and No. two rectification sub-primes are all arranged in the straight length of metering pipeline.
After adopting above-mentioned structure, due to the rectification pipeline section of two that arrange in the straight length before sonic nozzle cellular rectification sub-primes, fluid is successively through a rectification sub-prime, temperature transmitter, No. two rectification sub-primes, on the one hand, a rectification sub-prime solves the heat of fluid flowing generation in pipeline to the impact of temperature, ensure that the homogeneous temperature before critical flow sonic nozzle, in addition on the one hand, No. two rectification sub-primes solve traditionally the instability of the fluid caused because of the use of temperature transmitter, again on the one hand, the pressure transmission device installed does not affect air-flow, flowing field stability before utilizing two rectification sub-primes to improve high precision critical flow sonic nozzle thus, ensure that the even of the stable of gas medium and temperature.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high-performance fairing of the utility model critical flow sonic nozzle.
Embodiment
Below in conjunction with the drawings and specific embodiments, the high-performance fairing of critical flow sonic nozzle of the present utility model is described in further detail.
As shown in Figure 1, the high-performance fairing of critical flow sonic nozzle of the present utility model, comprises metering pipeline 1, and metering pipeline 1 has rectification pipeline section, and preferably, commutator tube segment length is 1.8m, rectification pipeline section comprises import pipeline section, rectification sub-prime section and outlet pipe section, import pipeline section connects measured stream gauge 5, outlet pipe section connects critical flow nozzle 2, the rectification sub-prime section of metering pipeline 1 is provided with before being positioned at critical flow nozzle 2 rectification sub-prime 3 and No. two rectification sub-primes 4, a Temperature T is provided with between a rectification sub-prime 3 and No. two rectification sub-primes 4, No. two rectification sub-prime 4 rears are provided with a pressure transmission device P, the length of import pipeline section and outlet pipe section is 5 times of critical flow sonic nozzle larynx footpath after rectification section respectively, cellular rectification sub-prime 2 length is 1 times of critical flow sonic nozzle larynx footpath after rectification section.
Wherein, in the utility model, a said rectification sub-prime 3 and No. two rectification sub-primes 4 are two cellular rectification sub-primes, preferably the diameter of cellular rectification sub-prime is 148mm, be covered with regular hexagon rectification through hole, the inscribed circle radius of orthohexagonal rectification through hole is 1.5mm, and the width of honeycomb is 12mm; Rectification pipeline section is straight-run of pipe section, and a rectification sub-prime 3 and No. two rectification sub-primes 4 are all arranged in this section of straight length.
Because air has glutinousness, air middle body flow velocity when Bottomhole pressure is fast, marginal portion flow velocity is slow, the utility model makes the flow field before high precision critical flow sonic nozzle stablize and homogeneous temperature by two cellular rectification sub-primes, reduce the glutinousness because of air simultaneously, solve the uncertainty of the verification result caused because fluids within pipes flow velocity is uneven.
Claims (3)
1. the high-performance fairing of a critical flow sonic nozzle, comprise the metering pipeline (1) for connecting measured stream gauge (5), metering pipeline (1) has a critical flow nozzle (2), it is characterized in that: be provided with in described metering pipeline (1) and be positioned at a front rectification sub-prime (3) of critical flow nozzle (2) and No. two rectification sub-primes (4), be provided with a Temperature T between a described rectification sub-prime (3) and No. two rectification sub-primes (4), described No. two rectification sub-prime (4) rears are provided with a pressure transmission device P.
2. according to the high-performance fairing of critical flow sonic nozzle according to claim 1, it is characterized in that: a described rectification sub-prime (3) and No. two rectification sub-primes (4) are two cellular rectification sub-primes.
3. according to the high-performance fairing of critical flow sonic nozzle according to claim 1, it is characterized in that: a described rectification sub-prime (3) and No. two rectification sub-primes (4) are all arranged in the straight length of metering pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520015264.4U CN204388981U (en) | 2015-01-09 | 2015-01-09 | The high-performance fairing of critical flow sonic nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520015264.4U CN204388981U (en) | 2015-01-09 | 2015-01-09 | The high-performance fairing of critical flow sonic nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204388981U true CN204388981U (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520015264.4U Active CN204388981U (en) | 2015-01-09 | 2015-01-09 | The high-performance fairing of critical flow sonic nozzle |
Country Status (1)
| Country | Link |
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| CN (1) | CN204388981U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976236A (en) * | 2018-01-24 | 2018-05-01 | 广州能源检测研究院 | The new current-stabilizing structure and current stabilization method of Sonic Nozzle Gas Flow Standard Device |
-
2015
- 2015-01-09 CN CN201520015264.4U patent/CN204388981U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976236A (en) * | 2018-01-24 | 2018-05-01 | 广州能源检测研究院 | The new current-stabilizing structure and current stabilization method of Sonic Nozzle Gas Flow Standard Device |
| CN107976236B (en) * | 2018-01-24 | 2023-08-18 | 广州能源检测研究院 | Steady flow structure and steady flow method of sonic nozzle gas flow standard device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |