CN1335488A - Novel vortex street flowmeter sensor - Google Patents
Novel vortex street flowmeter sensor Download PDFInfo
- Publication number
- CN1335488A CN1335488A CN 01142187 CN01142187A CN1335488A CN 1335488 A CN1335488 A CN 1335488A CN 01142187 CN01142187 CN 01142187 CN 01142187 A CN01142187 A CN 01142187A CN 1335488 A CN1335488 A CN 1335488A
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- piezoelectric ceramics
- probing shell
- garden sheet
- sheet
- briquetting
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Abstract
The novel vortex street flowmeter sensor has piezoelectric ceramic wafer vibration membrane structure as signal detecting element, and has piezoelectric ceramic wafer inside the casing cavity of probe. One end of the piezoelectric ceramic wafer is adhered directly to the bottom of the casing and the other end to the connection board. The piezoelectric ceramic wafer is pressed by one holddown block with insulating material in between. The wires are led out from the holddown block and the connection board. The probe is one rod structure, has planar top and the casing of the probe has one ring groove. The present invention has the advantages of simple production, high sensitivity, high vibration resistance, high precision repetition, etc.
Description
One. technical field
The present invention relates to a kind of vortex shedding flow meter, particularly a kind of vortex shedding flow meter sensing
The detecting element that uses on the device.
Two. background technology
The vortex street flowmeter sensor of producing is broadly divided into two types at present: a kind of is to see Fig. 1 with the signal detection component for the thickness flexure shock structure, this structure is to insert in the probing shell after sticking on a pair of piezoelectric ceramic piece 2 on the probe plug 3, its mode of connection can be that to connect also can be parallel connection method, in housing, fill filler then, this detecting element a cantilever inserts in the wake flow of triangular prism bumping post b back, this structure is high temperature resistant poor because of inserts, Gu the detecting element serviceability temperature is low, also because detecting element has adopted the inserts encapsulation, very easily aging, thereby this structure also exists life-span weak point, the shortcoming of poor seismic behavior.The type of another kind of vortex street sensor is to be that vibration mode is seen Fig. 3 with ceramic disks thickness, be with two pairs of piezoelectric ceramics unit sheets that polarised direction is opposite, pack in the shell of signal detection component, evenly compress with briquetting, this detecting element a directly and triangular prism bumping post b as one, though this structure good in anti-interference performance long service life, resistance to elevated temperatures is good, but because triangular prism promptly requires to produce strong vortex, can detect vortex frequency again, promptly the former requires triangular prism to be preferably stationary structure, and the latter requires triangular prism should be able to produce swing, require like this its processing dimension and accuracy requirement are controlled very complexity, so the processing request height.
Three. summary of the invention
The objective of the invention is to: the detecting element that designs a kind of novel vortex street flowmeter sensor makes its advantage that can have both various existing sensors can overcome the deficiency of prior art again, obtains satisfied measuring accuracy and heat-resisting quantity.
General vortex shedding flow meter is made up of sensor, connecting rod, Displaying Meter etc., and this is novel to be that the signal detection component in the sensor is done following improvement; Adopt piezoelectric ceramics disk vibration mode structure, the piezoelectric ceramics disk is put into the probing shell inner chamber, make piezoelectric ceramics one end directly be attached to the bottom of probing shell inner chamber, terminal block is close to the piezoelectric ceramics other end, and insulate with probing shell, briquetting compresses piezoelectric ceramic piece, between piezoelectric ceramics and briquetting, place insulating material, briquetting and housing are welded as a whole or wringing fit, lead is drawn from briquetting and terminal block respectively, and probing shell designs for step, pops one's head in to be the circular rod type structure, probe tip is a planar structure, has a ring groove at the chamber outer wall of probing shell.The piezoelectric ceramics disk also can adopt puts into probing shell simultaneously with two opposite piezoelectric ceramics of polarised direction, terminal block is between two piezoelectric ceramics disks, probing shell and briquetting join with the other two ends of piezoelectric ceramics respectively, and piezoelectric ceramics is by insulating material and housing insulation.In the probing shell inner chamber, also can place multi-disc piezoelectric ceramics disk as required.
Said structure has well overcome the shortcoming of prior art, make processing simple, the high anti-seismic performance of detection sensitivity is good, the repeatability precision height because of not needing packing material, makes long product lifecycle, resistance to elevated temperatures is good, and it is big to detect flow range, and flux lower limit is low, and range can be by bringing up to 12: 1 in original 10: 1 or higher.
Four description of drawings:
Fig. 1 is the prior art structural drawing
Fig. 2 is a figure detecting element structural drawing
Fig. 3 is another structural drawing of prior art
Fig. 4 is a structural drawing of the present invention
Fig. 5 is a sectional view of the present invention
Fig. 6 is the L portion partial enlarged drawing of Fig. 5
Fig. 7 is a slice piezoelectric ceramics structural drawing for detecting element
Fig. 8 is the partial enlarged drawing of Fig. 7
Fig. 9 is two piezoelectric ceramics structural drawing for detecting element
Figure 10 is the partial enlarged drawing of Fig. 9
Figure 11 is two piezoelectric ceramics structural drawing for detecting element
Figure 12 is the partial enlarged drawing of figure
Figure 13 is that the A of Fig. 1 is to synoptic diagram
Figure 14 is a piezoelectric ceramics disk mounting structure sketch
Figure 15 is a piezoelectric ceramics disk mounting structure sketch
Five specific embodiment
That detecting element is thickness flexure shock structure figure in the prior art among the figure, Fig. 3 For adopting garden sheet thickness vibration formula structural representation in the prior art.
Fig. 4 is structural design drawing of the present invention, and signal detection component a is positioned at triangle bumping post body b After, seeing also Fig. 7---Figure 14 is cuing open of several signal detection components among the present invention The face structure chart, the bottom of probing shell 1 is planar structure 12 among Fig. 7, probe 1 is the garden The rod design has annular groove 13 on the probing shell 1, to guarantee the better worker of detecting element Do, the inner chamber 10 of probing shell is directly put into piezoelectric ceramics garden sheet 2, makes piezoelectric ceramics Sheet 2 one ends in garden directly are attached to the bottom of probing shell inner chamber 10, and terminal plate 3 is close to piezoelectricity Pottery garden sheet 2 other ends, and with the probing shell insulation, briquetting 5 compresses piezoelectric ceramics Garden sheet 2 is placed insulating materials 4 between piezoelectric ceramics garden sheet 2 and briquetting 5, briquetting with Housing is welded as a whole or tight fit, and lead 6 and 8 is respectively from terminal plate 3 and briquetting 5 On draw, 7 for capping. Piezoelectric ceramic wafer 2 also can adopt the knot of Fig. 9 and Figure 11 Structure is put into probing shell 1 simultaneously with two opposite polarity piezoelectric ceramics garden sheets 2 In the chamber 10, wherein terminal plate 3 between two piezoelectric ceramics garden sheets 2, probing shell Join piezoelectric ceramics garden sheet with the other two ends of piezoelectric ceramics garden sheet 2 respectively with briquetting 5 2 by insulating materials 4 and probing shell 1 insulation, also can basis in the probing shell inner chamber Need to place multi-disc piezoelectric ceramics garden sheet, the present invention exemplifies no longer one by one, but user's root Select piezoelectric ceramics garden sheet according to needs, make an end of piezoelectric ceramics garden sheet draw lead, in addition One end is drawn another lead by briquetting and housing, can satisfy use of the present invention and want Ask.
Figure 14 and Figure 15 are respectively a slice piezoelectric ceramics garden sheet and the two piezoelectric ceramics gardens of adopting The mounting structure schematic diagram of sheet, F is for being subjected to force direction, and P is the piezoelectric ceramics polarised direction.
Fig. 5 is the present invention a kind of embodiment in actual use, the intelligent whirlpool after namely improving The structural representation of street flowmeter, wherein 01 is the table body, 02 is triangle bumping post body, 03 With 05 be sealing gasket, 06 is connecting rod, 07 is Displaying Meter.
Claims (3)
1. novel vortex street flowmeter sensor, it is characterized in that: the signal detection component in the sensor is to adopt piezoelectric ceramics garden sheet vibration mode structure, piezoelectric ceramics garden sheet is put into the probing shell inner chamber, make piezoelectric ceramics garden sheet one end directly be attached to the bottom of probing shell inner chamber, terminal block is close to the piezoelectric ceramics garden sheet other end, and insulate with probing shell, briquetting compresses piezoelectric ceramics garden sheet, between piezoelectric ceramics garden sheet and briquetting, place insulating material, lead is drawn from briquetting and terminal block respectively, and probing shell designs for step, pops one's head in to be the circular rod type structure, probe tip is a planar structure, has a ring groove at the chamber outer wall of probing shell.
2. vortex street flowmeter sensor according to claim 1, it is characterized in that: piezoelectric ceramics garden sheet also can adopt puts into probing shell simultaneously with two opposite piezoelectric ceramics of polarised direction, wherein terminal block is between two piezoelectric ceramics garden sheets, probing shell and briquetting join with the other two ends of sheet, piezoelectric ceramics garden respectively, and piezoelectric ceramics garden sheet is by insulating material and probing shell insulation.
3. according to the described vortex street flowmeter sensor of claim, it is characterized in that: in the probing shell inner chamber, also can place multi-disc piezoelectric ceramics garden sheet as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142187 CN1335488A (en) | 2001-09-17 | 2001-09-17 | Novel vortex street flowmeter sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142187 CN1335488A (en) | 2001-09-17 | 2001-09-17 | Novel vortex street flowmeter sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1335488A true CN1335488A (en) | 2002-02-13 |
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ID=4676685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01142187 Pending CN1335488A (en) | 2001-09-17 | 2001-09-17 | Novel vortex street flowmeter sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1335488A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087128A (en) * | 2011-01-28 | 2011-06-08 | 姚贤卿 | Changeable inductive vortex shedding flowmeter |
| CN106404082A (en) * | 2016-08-26 | 2017-02-15 | 江苏伟屹电子有限公司 | High-temperature vortex-street stress-type conducting sensor with adhesive-free packaging |
| CN111102197A (en) * | 2019-12-31 | 2020-05-05 | 南京精励汽车科技有限公司 | Vehicle air compressor flow monitoring device and monitoring system thereof |
-
2001
- 2001-09-17 CN CN 01142187 patent/CN1335488A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087128A (en) * | 2011-01-28 | 2011-06-08 | 姚贤卿 | Changeable inductive vortex shedding flowmeter |
| CN106404082A (en) * | 2016-08-26 | 2017-02-15 | 江苏伟屹电子有限公司 | High-temperature vortex-street stress-type conducting sensor with adhesive-free packaging |
| CN111102197A (en) * | 2019-12-31 | 2020-05-05 | 南京精励汽车科技有限公司 | Vehicle air compressor flow monitoring device and monitoring system thereof |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |