CN201503279U - Necking vortex street flow transmitter - Google Patents

Necking vortex street flow transmitter Download PDF

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Publication number
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
Authority
CN
China
Prior art keywords
curve
transmitter
segment
pipe body
segment pipe
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 - Fee Related
Application number
CN2009201280409U
Other languages
Chinese (zh)
Inventor
张年富
刘回乡
沈庆国
朱红五
刘建华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHONGQING JIAYU METER Co Ltd
Original Assignee
CHONGQING JIAYU METER Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHONGQING JIAYU METER Co Ltd filed Critical CHONGQING JIAYU METER Co Ltd
Priority to CN2009201280409U priority Critical patent/CN201503279U/en
Application granted granted Critical
Publication of CN201503279U publication Critical patent/CN201503279U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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

The shrinking neck type vortex flow transmitter
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.
Force transducer 6 is arranged on middle straight line segment tube wall 4 places, and force transducer 6 is electrically connected with amplification converter 8 by lead, and its detected correlation parameter signal conveys in the amplification converter 8, is amplified, conversion process, obtains the parameter signal that can discern.Amplification converter 8 is connected on the transmitter body by support 7.Force transducer 6 and amplification converter 8 can be selected existing structure for use, are not described further at this.
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.
CN2009201280409U 2009-07-14 2009-07-14 Necking vortex street flow transmitter Expired - Fee Related CN201503279U (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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