CN2574013Y - Built-in throttle device - Google Patents
Built-in throttle device Download PDFInfo
- Publication number
- CN2574013Y CN2574013Y CN 02262386 CN02262386U CN2574013Y CN 2574013 Y CN2574013 Y CN 2574013Y CN 02262386 CN02262386 CN 02262386 CN 02262386 U CN02262386 U CN 02262386U CN 2574013 Y CN2574013 Y CN 2574013Y
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- CN
- China
- Prior art keywords
- tube
- pipe
- venturi
- static pressure
- straight tube
- 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 - Lifetime
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Abstract
The utility model belongs to a fluid measuring device, particularly a built-in throttle device. The utility model comprises a venturi and a total static pressure detecting tube which are in sleeve joint, wherein, the venturi comprises a front straight tube, a front conical tube, a throat straight tube, a back conical tube, a pressure fetching tube, a wing plate and an outer ring casing. The utility model is characterized in that the inside of the total static pressure detecting tube is connected with the venturi, the throat straight tube of the venturi is a round tube, the ingress of the front conical tube is in a bell mouth shape, taper angles of the front conical tube are selected between 20 DEG to 42 DEG, and the taper angles of the back conical tube are selected between 7 DEG to 15 DEG. The contraction ratio of the conical tube and the contraction ratio of the front conical tube are larger than the contraction ratio of the back conical tube. The venturi is in sleeve joint in the total static pressure detecting tube through the wing plate which is uniformly distributed in four equal parts, and both ends of the wing plate are respectively fixed in the total static pressure detecting tube and on the venturi. The built-in throttle device which can provide higher pressure differences has the advantages of wider measuring ranges, higher measuring accuracy, simple structure and long life time.
Description
Technical field: this practical fluid measurement instrument that belongs to, particularly about a kind of hidden throttling device.
Background technology: known built-in dual-venturi fluid measurement instrument, it is applicable to the big caliber of low speed, the flow measurement of clean gas medium, a kind of built-in dual-venturi fluid measurement instrument is disclosed as the patent No.: ZL01213038.9, because it is to adopt the double-venturi tube socket to constitute, outside Venturi tube and inner Venturi tube are contracted in throat's gas for twice easy generation eddy current when mixing, especially reach 15m/s when above testing the speed, throat's differential pressure progressively strengthens, and the stability when high velocity stream progressively descends.Secondly, throat easily stops up when measuring media is dirtier, influences normal pressure.
Summary of the invention: the purpose of this utility model is: a kind of hidden throttling device is provided, and it can overcome above-mentioned shortcoming, and higher pressure difference is provided, and makes measurement range wider, and measuring accuracy is higher, and it is simple in structure, long service life.
The technical solution of the utility model is: design a kind of hidden throttling device, it comprises Venturi tube, total, static pressure sound-pipe socket formation, Venturi tube comprises preceding straight tube, preceding Taper Pipe, throat's straight tube, back Taper Pipe, pressure pipe, wing plate, outer circular chamber composition, it is characterized in that: be connected with a Venturi tube in total, the static pressure sound-pipe, throat's straight tube of Venturi tube is a pipe, inner cone tube inlet place is the hydraucone shape, the cone angle of preceding Taper Pipe is chosen in 20 °～42 °, and the cone angle of back Taper Pipe is chosen in 7 °～15 °.
Described Taper Pipe, the shrinkage ratio of preceding Taper Pipe is greater than the shrinkage ratio of back Taper Pipe.
Described Venturi tube by wing plate always be socketed in, in the static pressure sound-pipe; Wing plate is that quarter evenly distributes, two ends be separately fixed in the combined Pitot static probe and Venturi tube on.
Described pressure pipe total, the static pressure sound-pipe is communicated with respectively on the pressure port at preceding straight tube and throat straight tube center.
Described straight tube inside surface has antistick layer.
Principal feature of the present utility model is:
1, pressure reduction is big: the utility model adopts a Venturi tube, and it is simple in structure, has improved mobility status, reduces flow losses, and the flow that flows into Venturi tube is increased, and contraction section adopts big angle of throat, and institute is so that throat's gas velocity increases, and static pressure reduces.At the stagnation pressure of preceding supporting collection air-flow, the difference of the two just increases very big.
2, the utility model adopts one section straight pipe section in Venturi tube throat, and the mobile of its throat improved, and flows relatively steadily, so static pressure fluctuation is very little, has improved measuring stability.
3, the utility model adopts symmetrical isobaric wing plate to link to each other with total, static pressure sound-pipe, has avoided the asymmetric caused additional aerodynamic force of wing plate to structure and bubble-tight destruction, thereby has improved the reliability of system.
4, because differential pressure of the present utility model is big, thus differential flow improve than resolution, thereby make measurement more accurate, measurement range increasing.
5, quarter wing plate symmetry connects the destruction of having avoided stress distribution to cause.
6, because the utility model straight tube inside surface has antistick layer, make long product lifecycle, improved precision.
Description of drawings: the utility model is described further below in conjunction with the embodiment accompanying drawing.
Accompanying drawing 1 is embodiment 1 structural representation.
Accompanying drawing 2 is embodiment 2 structural representations.
Among the figure: 1, flange; 2, pressure pipe; 3, outer circular chamber; 4, total, static pressure sound-pipe; 5, antistick layer; 6, wing plate; 7, preceding straight tube; 8, preceding Taper Pipe; 9, throat's straight tube; 10, back Taper Pipe; 11, blowdown mouth; 12, pressure mouth.
Embodiment: embodiment 1 is as shown in Figure 1: it is made of hidden throttling device total, static pressure sound-pipe 4 and Venturi tube socket, always, there is flange 1 at static pressure sound-pipe 4 two ends, so that install, Venturi tube is in turn connected into one and is formed by preceding straight tube 7, preceding Taper Pipe 8, throat's straight tube 9, back Taper Pipe 10, before one end of pressure pipe 2 is connected on the pressure port of the pressure port of straight tube 7 and throat's straight tube 9, the other end of pressure pipe 2 is communicated with outer circular chamber 3, the outer circular chamber 3 on pressure pipe 2 tops is communicated with pressure mouth 12, and the outer circular chamber 3 of pressure pipe 2 bottoms is communicated with blowdown mouth 11.Venturi tube by wing plate 6 always be socketed in, on the static pressure sound-pipe 4.Wing plate 6 is that quarter evenly distributes.Preceding Taper Pipe 8 is gone into bore dia 300mm, and cone angle is 21 °, and throat's straight tube 9 is straight pipe segment length 129mm, and it is that the 260mm cone angle is 10 ° that back Taper Pipe 10 draws bore dia.The inside surface of throat's straight tube 9 is coated with antistick layer, has improved product serviceable life, precision is improved one grade.
Claims (5)
1, hidden throttling device, it comprises Venturi tube, total, static pressure sound-pipe (4) formation, Venturi tube comprises preceding straight tube (7), preceding Taper Pipe (8), throat's straight tube (9), back Taper Pipe (10), pressure pipe (2), wing plate (6), outer circular chamber (3) composition, it is characterized in that: be connected with a Venturi tube in total, the static pressure sound-pipe (4), throat's straight tube (9) of Venturi tube is the pipe section, preceding Taper Pipe (8) porch is the hydraucone shape, the cone angle of preceding Taper Pipe (8) is chosen in 20 °～42 °, and the cone angle of back Taper Pipe (10) is chosen in 7 °～15 °.
2, hidden throttling device according to claim 1 is characterized in that: described Taper Pipe, the shrinkage ratio of preceding Taper Pipe (8) is greater than the shrinkage ratio of back Taper Pipe (10).
3, hidden throttling device according to claim 1 is characterized in that: described Venturi tube by wing plate (6) always be socketed in, in the static pressure sound-pipe (4); Wing plate (6) is that quarter evenly distributes, two ends be separately fixed in the combined Pitot static probe (4) and Venturi tube on.
4, hidden throttling device according to claim 1 is characterized in that: described pressure pipe (2) total, static pressure sound-pipe (4) is communicated with respectively on the pressure port at preceding straight tube (7) and throat's straight tube (9) center.
5, hidden throttling device according to claim 1 is characterized in that: described straight tube inside surface has antistick layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02262386 CN2574013Y (en) | 2002-10-26 | 2002-10-26 | Built-in throttle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02262386 CN2574013Y (en) | 2002-10-26 | 2002-10-26 | Built-in throttle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2574013Y true CN2574013Y (en) | 2003-09-17 |
Family
ID=33728954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02262386 Expired - Lifetime CN2574013Y (en) | 2002-10-26 | 2002-10-26 | Built-in throttle device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2574013Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449274C (en) * | 2003-06-03 | 2009-01-07 | 西安中望流量仪表有限公司 | Inside-hiding throttler |
| CN103018479A (en) * | 2012-11-30 | 2013-04-03 | 中山市樱雪集团有限公司 | Wind speed monitoring device of gas water heater fan |
| CN104215360A (en) * | 2014-10-08 | 2014-12-17 | 王可崇 | Calorimeter based on novel movable Venturi tube flowmeter |
| CN104236644A (en) * | 2014-10-08 | 2014-12-24 | 王可崇 | Novel water meter with middle-through-hole movable throttling element |
| CN104236642A (en) * | 2014-10-08 | 2014-12-24 | 王可崇 | Novel flowmeter with middle-through-hole movable throttling element |
| CN104359514A (en) * | 2014-10-08 | 2015-02-18 | 王可崇 | Novel remote gas meter provided with middle through hole movable throttling element |
| GB2599126A (en) * | 2020-09-24 | 2022-03-30 | Connected Energy Tech Limited | A gas meter for a biogas digester |
-
2002
- 2002-10-26 CN CN 02262386 patent/CN2574013Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449274C (en) * | 2003-06-03 | 2009-01-07 | 西安中望流量仪表有限公司 | Inside-hiding throttler |
| CN103018479A (en) * | 2012-11-30 | 2013-04-03 | 中山市樱雪集团有限公司 | Wind speed monitoring device of gas water heater fan |
| CN104215360A (en) * | 2014-10-08 | 2014-12-17 | 王可崇 | Calorimeter based on novel movable Venturi tube flowmeter |
| CN104236644A (en) * | 2014-10-08 | 2014-12-24 | 王可崇 | Novel water meter with middle-through-hole movable throttling element |
| CN104236642A (en) * | 2014-10-08 | 2014-12-24 | 王可崇 | Novel flowmeter with middle-through-hole movable throttling element |
| CN104359514A (en) * | 2014-10-08 | 2015-02-18 | 王可崇 | Novel remote gas meter provided with middle through hole movable throttling element |
| CN104215360B (en) * | 2014-10-08 | 2018-04-03 | 王可崇 | Calorimeter based on novel movable differential pressure type flowmeter |
| CN104236644B (en) * | 2014-10-08 | 2018-12-07 | 王可崇 | Middle through-hole dynamic throttling element water meter |
| CN104236642B (en) * | 2014-10-08 | 2018-12-07 | 王可崇 | Middle through-hole dynamic throttling element flowmeter |
| CN104359514B (en) * | 2014-10-08 | 2018-12-28 | 王可崇 | Middle through-hole dynamic throttling element remote transmitting gas meter |
| GB2599126A (en) * | 2020-09-24 | 2022-03-30 | Connected Energy Tech Limited | A gas meter for a biogas digester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121026 Granted publication date: 20030917 |