CN201764992U - Vortex flow meter capable of replacing sensor on line - Google Patents
Vortex flow meter capable of replacing sensor on line Download PDFInfo
- Publication number
- CN201764992U CN201764992U CN2010205276405U CN201020527640U CN201764992U CN 201764992 U CN201764992 U CN 201764992U CN 2010205276405 U CN2010205276405 U CN 2010205276405U CN 201020527640 U CN201020527640 U CN 201020527640U CN 201764992 U CN201764992 U CN 201764992U
- Authority
- CN
- China
- Prior art keywords
- sensor
- vortex
- detection body
- flow meter
- vortex detection
- 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
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model relates to a vortex flow meter capable of replacing a sensor on line, which belongs to the flow measuring instrument technical field. The vortex flow meter comprises a flow measuring tube, a vortex detecting body, a sensor and a vortex generating body fixedly equipped inside the flow measuring tube and located in the upstream of the vortex detecting body. The utility model is characterized in that a hollow chamber is equipped inside the vortex detecting body; the outside tail end of the hollow chamber is provided with a rear fin; an elastomer is provided in the tail of the sensor; the sensor is inserted in the hollow chamber of the vortex detecting body and tightly attached to the vortex detecting body through the elastomer; and the vortex detecting body is connected with the installing hole in the flow measuring tube wall and sealed by welding. The utility model has the positive effects of high sensitivity due to the tight attachment of the sensor and the vortex detecting body through the elastomer in the sensor tail and a compression nut and good sealing performance due to the welding connection of the vortex detecting body and the flow measuring tube. Meanwhile, the compression nut can be unscrewed and removed on line. Therefore, the utility model can achieve replacing the sensor without stopping conveying materials. Furthermore, the utility model is simple in structure and convenient in processing.
Description
Technical field
The utility model belongs to the flow measurement instrument technical field, is specifically related to a kind of vortex shedding flow meter that can online more emat sensor.
Background technology
Vortex shedding flow meter is based on the Karman vortex street principle, and promptly fluid produces whirlpool in eddy generator (blunt form choked flow piece) back, and the flow velocity of whirlpool frequency and pipeline inner fluid is proportional.Fluid is by behind the eddy generator, changes the whirlpool frequency that can record fluid from the fluid differential pressure of vortex arising, and then the flow of measurable flow body.Vortex shedding flow meter can be measured fluid flow, also can be used for the measurement gas flow.
The fluid differential pressure of test fluid vortex arising changes, and sensor can be installed in eddy generator rear side in the pipeline, and the whirlpool of fluid can make the sensor mechanical hook-up produce small motion, and sensing part will detect motor message and convert electric signal to.Because there are various operating modes such as high temperature, burn into high pressure in processing medium, the sensing part that contacts with measured medium is impaired easily usually.
When common vortex shedding flow meter is changed at the impaired needs of sensing part, must stop convey materials, need be with the pipeline material cut-off, the pressure in the pipeline is laid down, and could change sensing part.Chinese patent application number is 01205954.4, name is called the utility model patent of " the constantly sensing head of replaceable vortex flow sensors under the flow ", disclose and a kind ofly need not cut off the design that processing medium is replaceable sensing part, its shortcoming is that sensing part is far away from fluid whirlpool sensing mechanical hook-up distance, it is low that signal transmits sensitivity, external vibration poor performance such as anti-pipeline, and the mechanical hook-up of sensor adopts mechanical seals such as pad, uses for high temperature, Korrosionsmedium and is easy to generate leakage.Disclosed vortex shedding flow meter also has the function of online more emat sensor in the U.S. Pat 4926695, and it is with the sensing mechanical sensitivity parts and the integrated processing of eddy generator of detecting sensor.Fluid whirlpool sensing mechanical sensitivity parts and eddy generator are integrated, have reduced the susceptibility of measurement component, and the processing technology complexity.
The utility model content
The technical problems to be solved in the utility model provide a kind of processing and production technology simple, sensor has high sensitivity, and high temperature resistant, high pressure, antileakaging vortex shedding flow meter that can online more emat sensor.
For achieving the above object, the technical solution adopted in the utility model is: vortex shedding flow meter that can online more emat sensor, comprise flow tube, vortex detection body, sensor, with be fixedly mounted in the flow tube and be positioned at the eddy generator of described vortex detection body upstream, it is characterized in that: the built-in hollow cavity of described vortex detection body, outside tail end has flat wedge-shaped flight; Described sensor afterbody is equipped with elastic body, and sensor places in the hollow cavity of vortex detection body, and fits tightly by elastic body and vortex detection body; Described vortex detection body is connected welded seal with described flow measurement tube wall mounting hole.
Be equipped with metallic O ring between described vortex detection body and the described sensor; Fixedly connected by the gland nut that places the described sensor outside.
Described sensor is piezoelectric transducer or capacitance type sensor.
The hollow cavity of described vortex detection body comprises to be measured the chamber and places the support chamber of measuring the end, chamber, and the support chamber internal diameter is the transition taper surface and connects less than measuring the chamber internal diameter.
Described elastic body end is discontinuous, is in-line or cruciform is cut apart.
Described elastomeric rear end external diameter is less than the support chamber internal diameter, and described elastomeric front end external diameter closely contacts with the support chamber medial surface of described vortex detection body, and do not contact with the bottom surface of support chamber greater than the support chamber internal diameter.
Good effect of the present utility model is: by the elastic body of sensor tail end and the gland nut on sensor top, sensor and vortex detection body are combined closely, and highly sensitive; Vortex detection body and flow tube are welded to connect, good seal performance; Because sensor directly do not contact with material, so can use, and must not stop convey materials during emat sensor under high temperature, high pressure operating mode more yet.Can be online by unscrewing, take off gland nut, reach the more purpose of emat sensor.The utility model is simple in structure, and is easy to process.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1: the utility model structural representation;
The A-A of Fig. 2: Fig. 1 is to view;
Fig. 3: vortex detection body structure synoptic diagram (amplification) among Fig. 2;
Fig. 4: the elastomer structure synoptic diagram (amplification) of sensor tail end.
Among the figure, the 1-flow tube; 2-vortex detection body; The 3-gland nut; 4-metal O type circle; The 5-sensor; The 6-elastic body; 7-vortex detection body empennage; The 8-eddy generator; 9-measures the chamber; The 10-support chamber.
Embodiment
The utility model structural representation as depicted in figs. 1 and 2, vortex shedding flow meter that can online more emat sensor, comprise flow tube 1, vortex detection body 2, sensor 5, with be fixedly mounted in the flow tube 1 and be positioned at the eddy generator 8 of described vortex detection body 2 upstreams, it is characterized in that: described vortex detection body 2 built-in hollow cavities, outside tail end has flat wedge-shaped flight 7; Described sensor 5 afterbodys are equipped with elastic body 6, and sensor 5 places in the hollow cavity of vortex detection body 2, and fit tightly by elastic body 6 and vortex detection body 2 medial surfaces; Described vortex detection body 2 is connected with described flow tube 1 tube wall mounting hole, welded seal, and this moment, vortex shedding flow meter formed complete hermetically-sealed construction.
Be equipped with metallic O ring 4 between described vortex detection body 2 and the described sensor 5; Fixedly connected by the gland nut 3 that places the outside, described sensor 5 tops, the fastening degree that can regulate sensor 5 by gland nut 3.O type metal o-ring 4 can prevent that outside steam or wet gas from entering in vortex detection body 2 cavities, and O type metal o-ring 4 can play the effect of sealing.
Described sensor 5 is piezoelectric transducer or capacitance type sensor.
Shown in Figure 3 as Fig. 2 and vortex detection body structure synoptic diagram, the built-in hollow cavity of described vortex detection body, hollow cavity comprise measures chamber 9 and support chamber 10, and outside tail end has flat wedge-shaped flight 7, has good intensity and sensitivity.The measurement chamber 9 and the support chamber 10 of vortex detection body 2 all are hollow cylindrical, and support chamber 10 internal diameters are less than measuring chamber 9 internal diameters, between be the transition taper surface and connect.The tapered structure in the outside of vortex detection body 2, tail end have flat wedge-shaped flight 7, both can reach higher intensity, and good sensitivity is arranged again.
As Fig. 2 and shown in Figure 4, the front end external diameter of the elastic body 6 of sensor tail end is greater than support chamber 10 internal diameters, and the rear end external diameter of described elastic body 6 is less than support chamber 10 internal diameters.Add man-hour, can preset the internal diameter of sensor 5 afterbody external diameters,, form elastic construction through cutting into in-line or cruciform otch greater than vortex detection body 2 support chamber 10.After the elastic body 6 that can guarantee sensor 5 afterbodys inserted in vortex detection bodies 2 support chamber 10, sensor 5 can fit tightly with vortex detection body 2, installs firmly, and can not be stuck in vortex detection body 2 support chamber 10.After sensor 5 inserts in vortex detection body 5 support chamber simultaneously, the elastic body 6 of afterbody does not contact with vortex detection body 2 support chamber 10 bottom surfaces, leaves a fixed gap, can guarantee sensor 5 and vortex detection body 2 support chamber 10 madial wall strong bonded like this, can not produce extra-stress, the mechanics transmission is abundant.
Principle of work of the present utility model is as follows: the fluid eddy generator 8 of in flow tube 1, flowing through, produce the fluid whirlpool, and transmit the whirlpool differential pressure signals by vortex detection body 2.Described vortex detection body 2 has flat wedge-shaped flight 7, by empennage 7 sensing fluid whirlpools, produces the vibration with fluid whirlpool same frequency; Because comprising, vortex detection body 2 built-in hollow cavities measure chamber 9 and support chamber 10, sensor 5 afterbody elastic bodys 6 are fixed in the support chamber 10 of vortex detection body 2, fit tightly with support chamber 10 madial walls, and do not contact with support chamber 10 bottom surfaces, therefore, can not produce additional stress, the mechanics transmission is abundant, and is highly sensitive.After sensor 5 detected the frequency signal of fluid vortex arising, signal passed to flow transmitter, converted frequency signal to flow signal by flow transmitter, through demonstration after calculating, also by electric current or frequency delivery rate signal.
Claims (6)
1. vortex shedding flow meter that can online more emat sensor, comprise flow tube, vortex detection body, sensor and be fixedly mounted in the flow tube and be positioned at the eddy generator of described vortex detection body upstream, it is characterized in that: the built-in hollow cavity of described vortex detection body, outside tail end has flat wedge-shaped flight; Described sensor afterbody is equipped with elastic body, and sensor places in the hollow cavity of vortex detection body, and fits tightly by elastic body and vortex detection body; Described vortex detection body is connected welded seal with described flow measurement tube wall mounting hole.
2. vortex shedding flow meter that can online more emat sensor as claimed in claim 1 is characterized in that: be equipped with metallic O ring between described vortex detection body and the described sensor; Fixedly connected by the gland nut that places the described sensor outside.
3. vortex shedding flow meter that can online more emat sensor as claimed in claim 1 or 2, it is characterized in that: described sensor is piezoelectric transducer or capacitance type sensor.
4. vortex shedding flow meter that can online more emat sensor as claimed in claim 1, it is characterized in that: the hollow cavity of described vortex detection body comprises to be measured the chamber and places the support chamber of measuring the end, chamber, and the support chamber internal diameter is the transition taper connection less than measuring the chamber internal diameter.
5. vortex shedding flow meter that can online more emat sensor as claimed in claim 1, it is characterized in that: described elastic body end is discontinuous, is in-line or cruciform is cut apart.
6. vortex shedding flow meter that can online more emat sensor as claimed in claim 1, it is characterized in that: described elastomeric rear end external diameter is less than the support chamber internal diameter, described elastomeric front end external diameter is greater than the support chamber internal diameter, closely contact with the support chamber medial surface of described vortex detection body, and do not contact with the bottom surface of support chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205276405U CN201764992U (en) | 2010-09-14 | 2010-09-14 | Vortex flow meter capable of replacing sensor on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205276405U CN201764992U (en) | 2010-09-14 | 2010-09-14 | Vortex flow meter capable of replacing sensor on line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201764992U true CN201764992U (en) | 2011-03-16 |
Family
ID=43717600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205276405U Expired - Lifetime CN201764992U (en) | 2010-09-14 | 2010-09-14 | Vortex flow meter capable of replacing sensor on line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201764992U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979964A (en) * | 2010-09-14 | 2011-02-23 | 涂强 | Vortex shedding flowmeter capable of changing sensor online |
-
2010
- 2010-09-14 CN CN2010205276405U patent/CN201764992U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979964A (en) * | 2010-09-14 | 2011-02-23 | 涂强 | Vortex shedding flowmeter capable of changing sensor online |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE602008005476D1 (en) | IMPROVED DIFFERENTIAL PRESSURE SENSORIZATION IN A PROCESS FLUID PRESSURE TRANSMITTER | |
| CN101979964B (en) | Vortex shedding flowmeter capable of changing sensor online | |
| CN110375813B (en) | Integrated sensor for measuring fluid temperature and vortex frequency and measuring method | |
| CN202092684U (en) | Diaphragm capsule type double-probe vortex street flow meter | |
| CN202256376U (en) | Assembly of medium and low-speed wind tunnel contraction section and flow measuring section | |
| CN102261935B (en) | Diaphragm capsule type double-probe vortex shedding flow meter | |
| CN201764992U (en) | Vortex flow meter capable of replacing sensor on line | |
| CN204944558U (en) | A kind of novel vortex street flowmeter | |
| CN203191005U (en) | Precession vortex flowmeter | |
| CN105973317A (en) | Bidirectional metering vortex shedding flowmeter | |
| CN201852604U (en) | Thermal gas mass flow meter | |
| CN201867272U (en) | Ultrasonic heat and cold meter | |
| CN210719271U (en) | Integrated sensor for measuring fluid temperature and vortex frequency | |
| CN210952964U (en) | Large-caliber anti-seismic vortex shedding flowmeter | |
| CN203719704U (en) | Steam vortex shedding flowmeter capable of measuring multiple parameters | |
| CN209197970U (en) | The multi-parameter pressure sensor of built-in dual sensor | |
| CN203534643U (en) | Mining precession vortex flow sensor | |
| CN204286511U (en) | Integration temperature head compensating vortex street effusion meter | |
| CN202994337U (en) | Ferrule-type ultrasonic flowmeter | |
| CN205483096U (en) | Vortex flowmeter of two -way measurement | |
| CN201034656Y (en) | Gas flow sensor | |
| CN103308104A (en) | Build-in balance flowmeter | |
| CN201421341Y (en) | Pressure-compensated composite flow transmitter | |
| CN203259198U (en) | Built-in balance flow meter | |
| CN203644127U (en) | Mechanical structure of pipeline card metering switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110316 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |