CN201503279U - Necking vortex street flow transmitter - Google Patents
Necking vortex street flow transmitter Download PDFInfo
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- CN201503279U CN201503279U CN2009201280409U CN200920128040U CN201503279U CN 201503279 U CN201503279 U CN 201503279U CN 2009201280409 U CN2009201280409 U CN 2009201280409U CN 200920128040 U CN200920128040 U CN 200920128040U CN 201503279 U CN201503279 U CN 201503279U
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Abstract
The utility model discloses a necking vortex street flow transmitter, which comprises an auxiliary generating body and a flange, and is characterized in that: a front curve-segment pipe body and a back curve-segment pipe body are respectively arranged at the front and the back of a straight-line-segment pipe body, and the meter body of the transmitter comprises the front curve-segment pipe body, the straight-line-segment pipe body and the back curve-segment pipe body; and the straight-line-segment pipe body is provided with a force sensor connected with an amplification converter, and the amplification converter is connected with the meter body of the transmitter through a support. The necking vortex street flow transmitter has pulse and analog output signals, and the frequency of the output pulse signals is not affected by the physical parameters (such as temperature, pressure, viscosity, component) of the measured medium and is only proportional to the flow velocity of the measured medium; the meter coefficient is only related to the diameter reducing ratio and the shape of the vortex generating body, and the utility model has higher reliability and long-term stability, and good anti-disturbance performance; and the flow rate which can not be measured originally can be measured, thereby solving the problems of 'large caliber small flow' or 'large caliber low-velocity '.
Description
Technical field
The utility model relates to a kind of transmitter of measuring fluid flow, especially shrinking neck type vortex flow transmitter.
Background technology
In industries such as oil, chemical industry, iron and steel, metallurgy, electric power, light industry, environmental protection and urban construction, expansion along with the pipeline inner fluid type of flow, need measure and control the flow of " big caliber low discharge " or " the low flow velocity of big caliber " fluid, determine parameters such as its temperature, pressure, differential pressure, flow, so that control and accurately grasp.The structure of existing like product can not be measured the flow of " big caliber low discharge " or " the low flow velocity of big caliber " fluid basically, and perhaps the precision of Ce Lianging is lower, has objectively lost reference value, can not use as controlled variable.The prior art vortex flow transmitter, because the needs of measuring, the straight length of its measuring channel is all long, or the whole inwall of measuring channel all is straight, so that temperature sensor, flow sensor or pressure transducer etc. conveniently to be set, the common vortex flow transmitter of this kind is measuring accuracy and poor reliability under the situation of " big caliber low discharge " or " the low flow velocity of big caliber ", even can't operate as normal.
Summary of the invention
The above-mentioned deficiency that the utility model occurs when measuring fluid at the vortex flow transmitter of prior art under the situation in the face of " big caliber low discharge " or " the low flow velocity of big caliber " provides the shrinking neck type vortex flow transmitter of a kind of energy measurement " big caliber low discharge " or " the low flow velocity of big caliber ".
The technical solution of the utility model: shrinking neck type vortex flow transmitter, comprise transmitter table body (being made up of preceding segment of curve body, middle straight line segment body and back segment of curve body), the auxiliary body that takes place, auxiliary generation body is arranged on the straight-line segment body place of transmitter table body middle part; It is characterized in that: in the front and back of straight-line segment body, segment of curve body and back segment of curve body before being provided with respectively, the body of transmitter table body is made of preceding segment of curve body, straight-line segment body and back segment of curve body; At straight-line segment body place, force transducer is set, force transducer is connected with amplification converter by lead; Amplification converter is connected on the transmitter table body by support.
Further feature is: preceding segment of curve body is Vickers curve (hereinafter to be referred as a Vickers curve) contraction section, and back segment of curve body is a Vickers curve diffuser.
The utility model shrinking neck type vortex flow transmitter with respect to prior art, has following characteristics:
1, pulse and simulate two kinds of output signals is arranged, the pulse signal frequency of output only is not directly proportional with the flow velocity of measured medium by the physical parameter (as temperature, pressure, viscosity, component) of measured medium, and its instrument coefficient is only relevant with vortex generation shape with the undergauge ratio;
2, no movable member, reliable operation, long service life;
3, simple in structure, easy for installation, maintenance load is little, and erected cost is low;
4, have higher reliability and long-time stability, disturbance rejection is good;
5, measurement range degree wide (can select the undergauge ratio) according to the customer flow parameter, the precision height, crushing is little;
6, straight length requires low (preceding 0～3D, back 0～1D);
7, transmitter is except that the characteristics with above-mentioned common vortex flow transmitter, maximum characteristics are to have improved instrument discharge characteristic and measuring condition, make original immeasurable flow become and to measure, solved the problem of " big caliber low discharge " or " the low flow velocity of big caliber ".
8, because not standardization of transmitter, thereby transmitter dispatches from the factory and all need carry out reality and fail to be sold at auction calmly, makes metering more accurate, reliable.
9, simple in structure, elegant in appearance, saved the instrument harsh conditions strict to forward and backward straight length, save installation workload and maintenance time.
Description of drawings
Fig. 1 is the utility model structure of transmitter synoptic diagram;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is a Vickers curve contraction section synoptic diagram.
In figure, the auxiliary body that takes place of 1-; The 2-flange; Vickers segment of curve body before the 3-; 4-middle straight line segment body; Vickers segment of curve body behind the 5-; The 6-force transducer; The 7-support; The 8-amplification converter.
Embodiment
In figure, shrinking neck type vortex flow transmitter of the present utility model, comprise auxiliary body 1, flange 2, straight-line segment tube wall 4, the force transducer 6 of taking place, auxiliary body 1 and the force transducer 6 of taking place, be arranged on straight-line segment tube wall 4 places of transmitter body middle part, shrinking neck type vortex flow transmitter of the present utility model is connected with pipeline to be measured by the flange 2 on the transmitter table body.Improvement of the present utility model is in the front and back of middle straight line segment body 4, segment of curve body 3 and back segment of curve body 5 before being provided with respectively, and the curve line style of preceding segment of curve body 3 and back segment of curve body 5 meets " Vickers curve ".Transmitter body of the present utility model is made of preceding segment of curve body 3, middle straight line segment body 4 and back segment of curve body 5, and preceding segment of curve body 3 is as Vickers curve contraction section, and back segment of curve body 5 is as Vickers curve diffuser.Before flange 2 is separately positioned on the Vickers curve diffuser of the Vickers curve contraction section of segment of curve body 3 and back segment of curve body 5, respectively with the fore-and-aft survey pipe on the joint flange connection.
Vickers curve contraction section of the present utility model is as shown in Figure 3:
The Vickers curve equation:
In the formula: R---contraction section length is the radius at Z place;
R1---the radius of contraction section inlet section;
R2---the radius of contraction section outlet section;
The length of Z0---contraction section;
Usually the outlet of Z0=4 R2. contraction section has one section to be the flat segments of 0.4R2.
In " fluid mechanics experimental technique " book of writing by Chen Kecheng of " China Machine Press " nineteen eighty-three publication, detailed introduction is arranged about the Vickers curve,, be not described further at this as prior art.
Claims (2)
1. the shrinking neck type vortex flow transmitter comprises auxiliary body (1), the flange (2) of taking place, and auxiliary generation body (1) is arranged on the straight-line segment body (4) of transmitter body middle part and locates; It is characterized in that: forward and backward at middle straight line segment body (4), segment of curve body (3) and back segment of curve body (5) before being provided with respectively, the body of transmitter body is made of preceding segment of curve body (3), middle straight line segment body (4) and back segment of curve body (5); Locate at middle straight line segment body (4), force transducer (6) is set, force transducer (6) is connected with amplification converter (8) by lead; Amplification converter (8) is connected on the transmitter body by support (7).
2. shrinking neck type vortex flow transmitter according to claim 1 is characterized in that: segment of curve body (3) is a Vickers curve contraction section before described, and back segment of curve body (5) is a Vickers curve diffuser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201280409U CN201503279U (en) | 2009-07-14 | 2009-07-14 | Necking vortex street flow transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201280409U CN201503279U (en) | 2009-07-14 | 2009-07-14 | Necking vortex street flow transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201503279U true CN201503279U (en) | 2010-06-09 |
Family
ID=42454211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201280409U Expired - Fee Related CN201503279U (en) | 2009-07-14 | 2009-07-14 | Necking vortex street flow transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201503279U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759770A (en) * | 2013-12-12 | 2014-04-30 | 上海肯特仪表股份有限公司 | Vortex flowmeter and production method for same |
| CN105092101A (en) * | 2015-09-16 | 2015-11-25 | 合肥瑞纳表计有限公司 | Ultrasonic calorimeter |
-
2009
- 2009-07-14 CN CN2009201280409U patent/CN201503279U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759770A (en) * | 2013-12-12 | 2014-04-30 | 上海肯特仪表股份有限公司 | Vortex flowmeter and production method for same |
| CN103759770B (en) * | 2013-12-12 | 2017-12-22 | 上海肯特仪表股份有限公司 | Swirl flowmeter and preparation method thereof |
| CN105092101A (en) * | 2015-09-16 | 2015-11-25 | 合肥瑞纳表计有限公司 | Ultrasonic calorimeter |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20130714 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chongqing Baoyuansen Instrument Manufacturing Co., Ltd. Assignor: Chongqing Jiayu Meter Co., Ltd. Contract record no.: 2014500000034 Denomination of utility model: Necking vortex street flow transmitter Granted publication date: 20100609 License type: Exclusive License Record date: 20140702 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |