GB699235A - Improvements in and relating to flow meters - Google Patents
Improvements in and relating to flow metersInfo
- Publication number
- GB699235A GB699235A GB3027149A GB3027149A GB699235A GB 699235 A GB699235 A GB 699235A GB 3027149 A GB3027149 A GB 3027149A GB 3027149 A GB3027149 A GB 3027149A GB 699235 A GB699235 A GB 699235A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pitot
- tube
- pipe
- tubes
- radius
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/46—Pitot tubes
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
699,235. Pitot-tube flowmeters. PRESTON, J. H. Nov. 24, 1950 [Nov. 25, 1949], No. 30271/49. Class 69(i) In a pitot-tube type flowmeter for fluids of low viscosity, the pitot tube is arranged in the flow pipe at a distance of approximately ¥ the radius from the axis of the pipe, in which position the vibration is independent of Reynolds number. In pipes of other than circular section, the term " radius " means half the distance apart of opposite walls in relation to which the pitot tube is set and the position of the pitot tube is actually within the range 0.72-0.76 of the radius. As shown in Fig. 1, a portion 1 of the flow pipe carries four pitot tubes 3a, 3b and four static holes 4, the axial parts 3a of the pitot tubes lying at ¥ R. The static holes 4 should be at least ten pitot tube diameters upstream of the radial part 3b of the pitot tube and should be in line with the pitot tube mouth but should lie on diameters at 45 degrees to the pitot tubes. The tube should extend half a pipe diameter ahead and behind the static holes. The pitot tubes may be connected to a single manometer to obtain the mean flow or to separate manometers to detect flow asymmetry. The pitot tubes may be traversed from the pipe wall to beyond the axis by a micrometer and in one form (not shown) a single micrometer adjusts the four pitot tubes simultaneously and equally. Alternatively only one of the pitot tubes has a micrometer attachment and this may be rotated with respect to the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3027149A GB699235A (en) | 1949-11-25 | 1949-11-25 | Improvements in and relating to flow meters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3027149A GB699235A (en) | 1949-11-25 | 1949-11-25 | Improvements in and relating to flow meters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB699235A true GB699235A (en) | 1953-11-04 |
Family
ID=10304995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3027149A Expired GB699235A (en) | 1949-11-25 | 1949-11-25 | Improvements in and relating to flow meters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB699235A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125799A (en) * | 2021-04-19 | 2021-07-16 | 重庆地格科技有限责任公司 | Intelligent anemorumbometer based on pitot tube |
| CN114838228A (en) * | 2022-06-08 | 2022-08-02 | 西安热工研究院有限公司 | Machining method of smoke air duct measuring section and smoke air duct measuring section |
| CN114838228B (en) * | 2022-06-08 | 2024-10-29 | 西安热工研究院有限公司 | Processing method of smoke duct measuring section and smoke duct measuring section |
-
1949
- 1949-11-25 GB GB3027149A patent/GB699235A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125799A (en) * | 2021-04-19 | 2021-07-16 | 重庆地格科技有限责任公司 | Intelligent anemorumbometer based on pitot tube |
| CN113125799B (en) * | 2021-04-19 | 2024-01-26 | 重庆地格科技有限责任公司 | Intelligent anemograph based on pitot tube |
| CN114838228A (en) * | 2022-06-08 | 2022-08-02 | 西安热工研究院有限公司 | Machining method of smoke air duct measuring section and smoke air duct measuring section |
| CN114838228B (en) * | 2022-06-08 | 2024-10-29 | 西安热工研究院有限公司 | Processing method of smoke duct measuring section and smoke duct measuring section |
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