CN201060018Y - Sonic type principal oscillation device used for Coriolis flowmeter - Google Patents
Sonic type principal oscillation device used for Coriolis flowmeter Download PDFInfo
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- CN201060018Y CN201060018Y CNU2007201248349U CN200720124834U CN201060018Y CN 201060018 Y CN201060018 Y CN 201060018Y CN U2007201248349 U CNU2007201248349 U CN U2007201248349U CN 200720124834 U CN200720124834 U CN 200720124834U CN 201060018 Y CN201060018 Y CN 201060018Y
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- vibrating tube
- balance wheel
- balancing
- tuning
- vibration
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Abstract
The utility model discloses a tuning-fork-type main vibration device that is used for a geostrophic force flowmeter, and comprises a main body, a driving element, a signal detection element, a dual-elbow vibration pipe and a vibration-isolation plate, wherein, the middle part of each vibration pipe is respectively provided with a balancing-swinging component, the balancing-swinging components are symmetrical left and right, two ends of each balancing-swinging component is respectively fixed on the corresponding vibration pipe; a magnetic-steel component and a coil component of the driving element are respectively fixed on the two balancing-swinging components; the two balancing-swinging components are connected with the main body through two paralleled non-magnetic elastic elements, and a reinforced beam and a frequency-conversion component that can be adjusted from up to down are arranged on the elastic element in order. The utility model has the advantages that the harmonic vibration of the device consisting of the elastic element and the balancing-swinging component is stable and reliable, which brings about high repetitiveness and high precision, thereby improving the safety and reducing the manufacturing cost; the welding supporting part of the vibration pipe can be effectively protected, thereby prolonging the service life of the instrument; the harmonic vibration frequency of the system can be adjusted.
Description
Technical field
The utility model relates to a kind of flow instrumentation, especially relates to a kind of tuning-fork type principal oscillation device that is used for Coriolis flow meter.
Background technology
Coriolis flow meter is to utilize fluid in the straight-line while, is in the rotation system a kind of direct-type mass rate instrument that the Coriolis force principle that generation is directly proportional with mass rate is made.Because the vibration tube-type mass flowmeter solved fluid in the straight-line while, also to be in the practical difficult problem in the rotation system, Coriolis flow meter is entered realize industry to apply the stage, obtained fast development.Coriolis flow meter mainly is made up of parts such as main body, vibrating tube, driving element, signal detection component, detector unit and associated flow transmitter.Wherein the vital part vibrating tube is by managing several branches: single tube, two-tube, continuous pipe are arranged; By tubular branch: straight tube, bend pipe are arranged.The pipeline section that plays a major role during vibrating tube is tubular is the twin elbow of plane (two dimension) bend pipe, the parallel connection type Coriolis flow meter is in the great majority, the main tubular U of having type (contains short U type, reducing U type), Ω type (modification that contains the Ω type), triangular form, droplet-shaped, arrowhead-shaped, T type etc., they are except that relative merits separately, a common characteristic is arranged, the driving element that is exactly flowmeter nearly all is directly to drive vibrating tube, be that vibrating tube is as unique flexible member, except that will undertaking the effect of Coriolis force, also to undertake the pacing items that produces Coriolis force-the keep reliable and stable harmonic motion of vibrating tube to it.For this reason, the vibrational system rigidity of twin elbow, parallel connection type Coriolis flow meter is lower, and pipe range is longer, and tube wall is thin (external diameter 5mm, wall thickness 0.2mm) relatively, and fluid makes the tube section distortion to the wearing and tearing and the high-pressure fluid of tube wall, easily brings hidden danger; For avoiding managing the influence that the outer wall frosting brings, higher to sealing, the requirement of withstand voltage of housing; Because the restriction of vibrating tube material and structure, vibrating tube material and structure once determining that the resonance frequency of system can not be adjusted, are given and are needed the resonance frequency of change system to make troubles under some situation; The vibrating tube long-term work easily causes fatigue of materials under the resonance frequency of vibrating tube, and the welding fastness at the supporting position of vibrating tube is brought influence.
Summary of the invention
The utility model is at the deficiency of existing Coriolis flow meter, a kind of tuning-fork type principal oscillation device that is used for Coriolis flow meter is provided, its technical scheme is: a kind of tuning-fork type principal oscillation device that is used for Coriolis flow meter, comprise main body, driving element, signal detection component, twin elbow vibrating tube and vibration isolation plate, it is characterized in that: all be horizontally disposed with symmetrical balance wheel assembly in the centre of each vibrating tube, the two ends of each balance wheel assembly are separately fixed on the corresponding vibrating tube; The magnet steel assembly of driving element and coil block are separately fixed on the two balance wheel assemblies; Be connected by two non-magnetic flexible members that are parallel to each other respectively between two balance wheel assemblies and the main body, be provided with the frequency conversion assembly of strengthening Beam and can adjusting the position up and down on the flexible member from top to bottom successively.
Driving element is fixed on the centre position of balance wheel assembly.The height of balance wheel assembly is positioned at the laterally the wideest point of vibrating tube.Signal detection component is two, and symmetry is fixed on the tubular normal in the top seal section left and right sides of vibrating tube respectively, with the distance of the balance wheel assembly strong point greater than three times of vibrating tube external diameters; The magnet steel assembly and the coil block of each signal detection component are separately fixed on two vibrating tube.The external diameter of flexible member is less than the external diameter of vibrating tube.
The utility model has the advantages that: the harmonic motion of the device that flexible member and balance wheel assembly constitute is reliable and stable, brings high duplication and high precision; Tube wall can thicken (external diameter 5mm, wall thickness 1mm) relatively, and security is improved; The influence that pipe outer wall frosting brings can be ignored, and can suitably reduce the sealing and the requirement of withstand voltage of housing, is minimized manufacturing cost; The Weld-supporting position of vibrating tube can be effectively protected, and prolongs the serviceable life of instrument; The resonance frequency of system can be carried out the adjustment of certain limit according to the material of client's working medium, field working conditions and vibrating tube.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is applied to the structural representation of U type vibrating tube for the utility model.
Fig. 3 is applied to the structural representation of Ω type vibrating tube for the utility model.
Fig. 4 is applied to the structural representation of triangular form vibrating tube for the utility model.
Fig. 5 is applied to the structural representation of droplet-shaped vibrating tube for the utility model.
Fig. 6 is applied to the structural representation of arrowhead-shaped vibrating tube for the utility model.
Fig. 7 is applied to the structural representation of T type vibrating tube for the utility model.
In the accompanying drawing: the 1-main body; 2-strengthens Beam; 3-frequency conversion assembly; The 4-flexible member; The 5-driving element; 6-balance wheel assembly; The 7-signal detection component; The 8-vibrating tube; 9-vibration isolation plate
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a structural representation of the present utility model, and double dot dash line part is different shapes in different embodiment among the figure, as Fig. 2-shown in Figure 7.The utility model is applicable on various tubular twin elbows, the parallel connection type Ao Lili flowmeter, as U type (containing short U type, reducing U type), Ω type (modification that contains the Ω type), triangular form, droplet-shaped, arrowhead-shaped, T type etc.
The tuning-fork type principal oscillation device that is used for Coriolis flow meter provided by the utility model, comprise main body 1, driving element 5, signal detection component 7, twin elbow vibrating tube 8 and vibration isolation plate 9, all be horizontally disposed with symmetrical balance wheel assembly 6 in the centre of each vibrating tube 8, the two ends of each balance wheel assembly 6 are separately fixed on the corresponding vibrating tube 8; The magnet steel assembly of driving element 5 and coil block are separately fixed on the two balance wheel assemblies 6; Be connected by two non-magnetic flexible members 4 that are parallel to each other respectively between two balance wheel assemblies 6 and the main body 1, be provided with the frequency conversion assembly 3 of strengthening Beam 2 and can adjusting the position up and down on the flexible member 4 from top to bottom successively; Driving element 5 is fixed on the centre position of balance wheel assembly 6.Frequency conversion assembly 3 clampings between the reinforcement Beam 2 and balance wheel assembly 6 on the two elastic elements 4, with the distance of balance wheel assembly 6 be L, the L value can be adjusted when the reliable and stable harmonic motion of determining vibrating tube 8.
The place of Coriolis force effect maximum should be considered to reserve in the installation site of balance wheel assembly 6 and vibrating tube 8, be generally the laterally the wideest point of vibrating tube 8, as Fig. 2, Fig. 3, Fig. 5, Fig. 6, Fig. 7, Fig. 4 is then near the laterally the wideest point of vibrating tube 8, the profile of balance wheel assembly 6 can be by considering by lighter weight after structure that satisfies system and the requirement of strength, take the method for counterweight to determine in the experiment, the quality of adjusting balance wheel assembly 6 can improve the moving amplitude of system resonance.
The pacing items of the generation Coriolis force that this device is undertaken reason vibrating tube 8-keep the reliable and stable harmonic motion of vibrating tube 8 changes flexible member 4 and the balance wheel assembly 6 mainly made by the nonmagnetic elastic alloy material in the device into and undertakes.After flow transmitter provides power to driving element 5, driving element 5 forces two elastic elements 4 starting of oscillations, under the detection control of flow transmitter, keep the reliable harmonic motion of system stability, the resonance frequency of system is very near tuning-fork type principal oscillation device natural frequency at this moment, two vibrating tube 8 are with its vibration, and what participate in measuring only is the top seal section of two vibrating tube 8.The harmonic motion of the device that flexible member 4 and balance wheel assembly 6 constitute is reliable and stable, brings high duplication and high precision; Tube wall can thicken (external diameter 5mm, wall thickness 1mm) relatively, and security is improved; The influence that pipe outer wall frosting brings can be ignored, and can suitably reduce the sealing and the requirement of withstand voltage of housing, is minimized manufacturing cost; The Weld-supporting position of vibrating tube 8 can be effectively protected, and prolongs the serviceable life of instrument; The resonance frequency of system can be carried out the adjustment of certain limit according to the material of client's working medium, field working conditions and vibrating tube 8.
When Coriolis flow meter dry testing of the present utility model is installed, the L value is once determining, the harmonic motion of system just has a resonance frequency corresponding with it, increasing L value resonance frequency reduces, otherwise, reduce the raising of L value resonance frequency, the resonance frequency of system can be carried out the adjustment of certain limit by designer's intention according to the material of client's working medium, field working conditions and vibrating tube etc.
Claims (5)
1. tuning-fork type principal oscillation device that is used for Coriolis flow meter, comprise main body (1), driving element (5), signal detection component (7), twin elbow vibrating tube (8) and vibration isolation plate (9), it is characterized in that: all be horizontally disposed with symmetrical balance wheel assembly (6) in the centre of each vibrating tube (8), the two ends of each balance wheel assembly (6) are separately fixed on the corresponding vibrating tube (8); The magnet steel assembly of driving element (5) and coil block are separately fixed on the two balance wheel assemblies (6); Be connected by the two non-magnetic flexible members (4) that are parallel to each other respectively between two balance wheel assemblies (6) and the main body (1), be provided with the frequency conversion assembly (3) of strengthening Beam (2) and can adjusting the position up and down on the flexible member (4) from top to bottom successively.
2. the tuning-fork type principal oscillation device that is used for Coriolis flow meter according to claim 1, it is characterized in that: driving element (5) is fixed on the centre position of balance wheel assembly (6).
3. the tuning-fork type principal oscillation device that is used for Coriolis flow meter according to claim 1 is characterized in that: the height of balance wheel assembly (6) is positioned at the laterally the wideest point of vibrating tube (8).
4. according to claim 1 or the 3 described tuning-fork type principal oscillation devices that are used for Coriolis flow meter, it is characterized in that: signal detection component (7) is two, symmetry is fixed on the tubular normal in the top seal section left and right sides of vibrating tube (8) respectively, with the distance of balance wheel assembly (6) strong point greater than three times of vibrating tube (8) external diameter; Magnet steel assembly of each signal detection component (7) and coil block are separately fixed on two vibrating tube (8).
5. the tuning-fork type principal oscillation device that is used for Coriolis flow meter according to claim 1, it is characterized in that: the external diameter of flexible member (4) is less than the external diameter of vibrating tube (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201248349U CN201060018Y (en) | 2007-07-27 | 2007-07-27 | Sonic type principal oscillation device used for Coriolis flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201248349U CN201060018Y (en) | 2007-07-27 | 2007-07-27 | Sonic type principal oscillation device used for Coriolis flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201060018Y true CN201060018Y (en) | 2008-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201248349U Expired - Lifetime CN201060018Y (en) | 2007-07-27 | 2007-07-27 | Sonic type principal oscillation device used for Coriolis flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201060018Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101729A1 (en) * | 2012-12-31 | 2014-07-03 | Sun Xiaojun | Mass flowmeter |
-
2007
- 2007-07-27 CN CNU2007201248349U patent/CN201060018Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101729A1 (en) * | 2012-12-31 | 2014-07-03 | Sun Xiaojun | Mass flowmeter |
| RU2617709C2 (en) * | 2012-12-31 | 2017-04-26 | Волсн Энтерпрайзис Лтд | Mass flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080514 |
|
| CX01 | Expiry of patent term |