CN2729652Y - Vibrating tube for Ke's mass flowmeter - Google Patents
Vibrating tube for Ke's mass flowmeter Download PDFInfo
- Publication number
- CN2729652Y CN2729652Y CN 200420092978 CN200420092978U CN2729652Y CN 2729652 Y CN2729652 Y CN 2729652Y CN 200420092978 CN200420092978 CN 200420092978 CN 200420092978 U CN200420092978 U CN 200420092978U CN 2729652 Y CN2729652 Y CN 2729652Y
- Authority
- CN
- China
- Prior art keywords
- vibrating tube
- profile
- summit
- tube
- mass flowmeter
- 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
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model relates to a vibrating tube for Ke's mass flowmeter, comprising a single-tube type, a double-tube pipe and a double-tube connection-series type structure. The vibrating tube comprises a rigid tube body bent into a quadrangle contour appearance with symmetrical left and right sides and asymmetric big lower part and small upper part, the lower end of the quadrangle contour appearance is provided with an opening, and the quadrangle contour appearance is formed into an upper top point and two top points of the horizontal direction by three bending sections and is matched and formed into a seamless tube line by four straight-tube sections. The utility model is late-model vibration tube contour appearance with high sensibility, good stability, simple process, easy production and low cost.
Description
Technical field
The utility model relates to the vibrating tube that a kind of Coriolis mass flowmeter is used, and belongs to the flowrate measuring tool field.
Background technology
Its vibrating tube of Coriolis mass flowmeter has straight tube and bend pipe two big classes, and divides single tube and two-tube two kinds of patterns in each class, and the single tube type is many with straight tube, and double-tube type is many with bend pipe.The bend pipe class has U-shaped in the prior art, T shape, Ω shape, annular, arrow-shaped, C shape, forms such as raindrop shape.U-shaped and C shape vibrating tube shape are simpler, and production is easy but sensitivity is lower, and T shape and arrow-shaped sensitivity are higher, but complex-shaped production difficulty is big.Disclosed T type of difference and arrowhead-shaped vibrating tube just have problems such as complex-shaped production difficulty is big in the Chinese patent 96213252.7 and 98249891.8.
Summary of the invention
The purpose of this utility model is to make a kind of highly sensitive, good stability, and technology is simple, is easy to produce the novel vibrating pipe profile profile that cost is low.
The utility model is to realize by following approach: a kind of Coriolis mass flowmeter vibrating tube, comprise single hose, double hose and two-tube serially connected structure, this vibrating tube bends to left-right symmetric by the rigidity body and forms greater than last asymmetric quadrilateral profile profile down, and opening is left in the lower end of this quadrilateral profile profile.This quadrilateral profile profile is to constitute one by three sections bending sections to go up summit and two horizontal direction summits, and forms a seamless pipeline by four sections straight lengths cooperations.
The utility model is because its underpart bearing is narrower, upper wider and certain altitude is arranged again, so coriolis force is bigger to the swing amplification of head test section, itself and triangle, T shape, arrow-shaped vibration tube be similar to have higher sensitivity, be higher than U-shaped, some other form vibrating tube such as C shape; Because the installation of its vibrator goes out than triangle and T form height, stability is higher than some other form vibrating tube such as triangle and T shape.Because crooked less, its manufacturing process is simpler than T shape (four bending sections, five straight lengths), arrow-shaped (five bending sections, four straight lengths) and Ω shape etc., operation is few, the yield rate height.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model Coriolis mass flowmeter vibrating tube structural representation
Fig. 2 is the utility model Coriolis mass flowmeter constitutes mass flowmeter with vibrating tube a synoptic diagram
Specific embodiment
A kind of Coriolis mass flowmeter vibrating tube, comprise single hose, double hose and two-tube serially connected structure, as shown in Figure 1, vibrating tube (1) be made into left-right symmetric and asymmetric up and down and lower vertex to the distance of horizontal diagonal line (3) greater than the quadrilateral profile profile (2) of upper vertex (5) to the distance of horizontal diagonal line (3).The horizontal direction summit (6) of vibrating tube quadrilateral profile profile (2) and the width between (7) and last summit (5) to the ratio of the height that opening (4) is located are: 0.5～2.The last summit (5) of quadrilateral profile profile (2) exceeds the diameter of 1～10 vibrating tube of line (1) between horizontal summit.The wall thickness of vibrating tube (1) is 0.2～0.01 vibrating tube diameter.The bending radius that last summit (5) and horizontal direction summit (7) and summit (6) are located is that 2～5 vibrating tube diameters can not be wrinkling.The profile physical dimension of vibrating tube is main relevant with four aspects, and they are respectively: material type and wall thickness, working ability, flow size, the scope that transmitter is supported.The general big vibrating tube diameter of flow is just big, and quadrilateral vibrating tube profile physical dimension (2) is corresponding also big, and the corresponding vibration frequency is lower.Be example for example with the 316L stainless steel material, if vibrating tube (1) diameter selects 2 millimeters of 28 millimeters, wall thickness, then recommend vibrating tube profile profile (2) to be of a size of: the width between horizontal direction summit (6) and (7) is 390 millimeters, 122 millimeters of lower openings width, the height that last summit (5) is located to opening (4) is 340 millimeters, the transition of 40 millimeters radian natures of the height on summit bending section (5) mid point anomaly top, 75 millimeters of summit, left and right sides bending section radiuses.Quadrilateral vibrating tube physical dimension selection principle: the ratio of width to height is 0.5～2, the diameter of 1～10 vibrating tube (1) when bending tune mid point exceeds flat-top, vibrating tube (1) wall thickness is 0.2～0.01 vibrating tube diameter, and it is that 2～5 vibrating tube diameters can not be wrinkling that bending section generally selects bending radius.Take the circumstances into consideration plus-minus at different medium and different application environment.Vibrating tube (1) but material stainless steel, titanium alloy steel or other have the resilient material of higher figure of merit.
As shown in Figure 2, the vibration tube-type Coriolis mass flowmeter is made up of sensor and transmitter two parts, and the vibration tube-type sensor is made up of vibrating tube assembly, stake body 14, flange body 15, terminal box 16, terminal 17 etc.Bending section summit (5) are equipped with vibrator (8) on the vibrating tube, and vibrator is an electromagnetic mode.Summit (7) and (6) bending section amplitude of oscillation maximum position place are equipped with detecting device (9) and (10) in the horizontal direction, and detecting device can be electromagnetic mode or photovoltaic.The lower end of vibrating tube (1) is symmetrically installed with spacer assembly (12) and (13), and temperature sensor (11) is housed.Whole quadrilateral vibrating tube member is welded on the stake body runner port and is sealed in the housing of rustless metal, filling inert gas in the housing.
In the above-mentioned vibration tube-type mass rate flowmeter sensor, the lead-in wire of vibrator, left and right sides detecting device and temperature sensor is pasted along tube wall and down to stake body, draw through encapsulation process and to receive on the terminal box middle connecting terminal plate (17), with private cable (18) the quadrilateral vibration tube sensor is linked to each other with mass flow transmitter (19), constitute quadrilateral vibration tube-type mass flowmeter.
After the energising work, when medium in the sensor does not flow, the sensor signal promotes vibrator through the transmitter processing and amplifying, causing after the exciting amplitude increases that detection signal strengthens passes to transmitter again, the transmitter processing and amplifying promotes vibrator, thereby the formation closed loop, because the gain control effect makes vibrating tube do continuous vibration very soon on resonance frequency.Because the promotion of coriolis force, one of stack and vibration are with the swinging of frequency in vibration when media flow, and the size of amplitude of fluctuation angle (Δ θ) is directly proportional with the size of coriolis force Fc, and Fc ∝ Δ θ is arranged.Because Δ θ=ω Δ t, promptly the phase differential of left and right sides detecting device is Δ t, and Fc ∝ Δ t is promptly arranged.Its latus rectum is constant because vibrating tube is determined the back, so solution formula is arranged: Qm=K*E* Δ t.
Qm is a mass rate in the formula, and K is a coefficient of flow, and E is a correction factor.
Flow coefficient k provides at timing signal.
E mainly is the quadrilateral vibrating tube elastic modulus correction factor that is caused by temperature variation, changes with temperature sensor 11 sense temperature of pasting on the vibrating tube outer wall, in transmitter this is proofreaied and correct, so that obtain the exact mass flow of fluid.
Because the stream pipe of sensor is a mode of vibration, the variation of pipe medium density will cause the variation of quadrilateral vibrating tube vibration frequency f, because vibration period T=1/f promptly has density p=f (T).So can carrying out density to the medium that sensor quadrilateral vibrating tube flows through, resolves transmitter.
The quadrilateral profile profile vibrating tube that the utility model adopted is not limited only to the foregoing description.
Claims (8)
1, a kind of Coriolis mass flowmeter vibrating tube, comprise single hose, double hose and two-tube serially connected structure, it is characterized in that above-mentioned vibrating tube is to be bent to left-right symmetric and descended greater than last asymmetric quadrilateral profile profile (2) by the rigidity body to constitute, and opening (4) is left in the lower end of this quadrilateral profile.
2, Coriolis mass flowmeter vibrating tube according to claim 1, it is characterized in that described quadrilateral profile profile (2) is to be made of three sections bending sections to go up summit (5) and horizontal direction summit (6) and (7), and form a seamless pipeline by four sections straight lengths cooperations.
3, Coriolis mass flowmeter vibrating tube according to claim 1 is characterized in that the ratio of the height that the horizontal direction summit (6) of vibrating tube quadrilateral profile profile (2) and the width between (7) and last summit (5) are located to opening (4) is: 0.5～2.
4, Coriolis mass flowmeter vibrating tube according to claim 1 is characterized in that the last summit (5) of quadrilateral profile profile (2) exceeds the diameter of 1～10 vibrating tube of line (1) between the horizontal direction summit.
5, Coriolis mass flowmeter vibrating tube according to claim 1, the wall thickness that it is characterized in that vibrating tube (1) are 0.2～0.01 vibrating tube diameter.
6, Coriolis mass flowmeter vibrating tube according to claim 1 is characterized in that the bending radius that the last summit (5) of quadrilateral profile profile (2), left summit (7) and right summit (6) are located is 2～5 vibrating tube diameters.
7, Coriolis mass flowmeter vibrating tube according to claim 1, vibrator (8) is located to be equipped with in the last summit (5) that it is characterized in that quadrilateral profile profile (2), at summit, the left and right sides (7) and (6) bending section of quadrilateral profile profile (2) detecting device (9) and (10) is installed.
8, Coriolis mass flowmeter vibrating tube according to claim 1 is characterized in that the latter end of vibrating tube (1) is symmetrically installed with spacer assembly (12) and (13), and temperature sensor (11) is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420092978 CN2729652Y (en) | 2004-09-24 | 2004-09-24 | Vibrating tube for Ke's mass flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420092978 CN2729652Y (en) | 2004-09-24 | 2004-09-24 | Vibrating tube for Ke's mass flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2729652Y true CN2729652Y (en) | 2005-09-28 |
Family
ID=35048428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420092978 Expired - Fee Related CN2729652Y (en) | 2004-09-24 | 2004-09-24 | Vibrating tube for Ke's mass flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2729652Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012251A (en) * | 2010-09-29 | 2011-04-13 | 西安东风机电有限公司 | Method and device for detecting additives, abrasion or corrosion on wall of vibrating tube of Coriolis mass flowmeter |
-
2004
- 2004-09-24 CN CN 200420092978 patent/CN2729652Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012251A (en) * | 2010-09-29 | 2011-04-13 | 西安东风机电有限公司 | Method and device for detecting additives, abrasion or corrosion on wall of vibrating tube of Coriolis mass flowmeter |
| CN102012251B (en) * | 2010-09-29 | 2012-08-15 | 西安东风机电有限公司 | Method and device for detecting additives, abrasion or corrosion on wall of vibrating tube of Coriolis mass flowmeter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101858765B (en) | Quasi-linear tube Coriolis mass flowmeter | |
| CN103076053B (en) | A kind of mass flowmeter | |
| US8596141B2 (en) | Vortex flow meter with vortex oscillation sensor plate | |
| CN100397047C (en) | Coriolis mass flowmeter | |
| CN102322907B (en) | Integrated intelligent gas flow meter with double flow measuring heads | |
| CN101432600A (en) | Balancing structure of single curved pipe type Coriolis flowmeter | |
| JPH09512341A (en) | Coriolis mass flow meter | |
| CN104541135B (en) | Coriolis flowmeter and method with improved scale zero-bit | |
| AU770047B2 (en) | Coriolis mass flow meter | |
| WO2004099733A1 (en) | Coriolis flowmeter | |
| CN108548573B (en) | Differential pressure flowmeter | |
| CN107810391A (en) | Coriolis mass and flow measuring apparatus and/or densitometer | |
| CN2729652Y (en) | Vibrating tube for Ke's mass flowmeter | |
| CN202057366U (en) | Wide-range intelligence gas flow meter | |
| CN101023325A (en) | Tertiary mode vibration type coriolis flowmeter | |
| CN100412514C (en) | Coriolis flowmeter | |
| CN204594515U (en) | A kind of mass flow sensor | |
| CN104776891A (en) | Mass flow rate sensor | |
| CN214308943U (en) | Double-tube type Coriolis flowmeter fixing support | |
| CN100451565C (en) | Coriolis flow rate meter | |
| CN103278204A (en) | Micro mass flow sensor with fusion of Coriolis effect and differential pressure effect | |
| CN100478652C (en) | Coriolis flow rate meter with flow tube of double loop structure | |
| CN2560923Y (en) | V-shape conic flow meter | |
| CN201387347Y (en) | Bracket structure for mass flowmeter | |
| CN1285889C (en) | Double C-type tube coriodis mass flow meter |
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: 20050928 Termination date: 20130924 |