CN2535777Y - Novel vortex-streat flow meter sensor - Google Patents
Novel vortex-streat flow meter sensor Download PDFInfo
- Publication number
- CN2535777Y CN2535777Y CN 01261173 CN01261173U CN2535777Y CN 2535777 Y CN2535777 Y CN 2535777Y CN 01261173 CN01261173 CN 01261173 CN 01261173 U CN01261173 U CN 01261173U CN 2535777 Y CN2535777 Y CN 2535777Y
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- CN
- China
- Prior art keywords
- piezoelectric ceramics
- probing shell
- briquetting
- piezoelectric ceramic
- ceramic disk
- 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
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- 239000000919 ceramic Substances 0.000 claims abstract description 54
- 239000000523 sample Substances 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 239000012774 insulation material Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
A novel sensor for swirl flowmeters is disclosed, wherein a signal detecting element adopts a piezoelectric ceramic disk vibration mode structure. A piezoelectric ceramic disk is placed into the inner chamber of a shell of a probe, wherein one end of the piezoelectric ceramic disk is directly attached on the bottom portion of the inner chamber of the shell of the probe, and the other end of the piezoelectric ceramic disk is tightly pressed by a patching board. A briquetting presses the piezoelectric ceramic disk, insulation material is placed between the piezoelectric ceramic disk and the briquetting, and wires are separately brought out from the briquetting and the patching board. The probe adopts a round bar structure, the top end of the probe adopts a planar structure, and a ring-shaped groove is processed on the outer wall of the chamber of the shell of the probe. The novel sensor adopting the structure described above overcomes the disadvantages of the prior art, and realizes simple fabrication, high detecting sensitivity, good aseismatic behavior, and high repeatable accuracy. Due to the needlessness of filled composite, the novel sensor achieves long useful life, good thermostable behavior, large flow capacity detecting range, and low flow capacity lower-limit, and the measuring range of the novel sensor is increased from 10:1 to more than 12:1.
Description
One. technical field
This novel a kind of vortex shedding flow meter, detecting element that uses on particularly a kind of vortex street flowmeter sensor of relating to.
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 be with a pair of piezoelectric ceramic piece 2 ' stick on probe plug 3 ' go up back insert probing shell 1 ' in, 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
This novel purpose is: 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 brought up to 12:1 or higher by original 10:1.
Four description of drawings:
Fig. 1 is the prior art structural drawing
Fig. 2 is Fig. 1 detecting element structural drawing
Fig. 3 is another structural drawing of prior art
Fig. 4 is this new structure figure
Fig. 5 is this novel sectional view
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 11
Figure 13 is that the A of Figure 11 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 embodiments
Be that detecting element is thickness flexure shock structure figure in the prior art among Fig. 1, Fig. 3 adopts disk thickness vibration formula structural representation in the prior art.
Fig. 4 is this new structure design drawing, after signal detection component a is positioned at triangle bumping post body b, see also Fig. 7---Figure 13, for this novel in the sectional structure chart of several detecting elements, the bottom of probing shell 1 is a planar structure 12 among Fig. 7, probe 11 designs for pole, annular groove 13 is arranged on the probing shell 1, better work to guarantee detecting element, the inner chamber 10 of probing shell 1 is directly put into piezoelectric ceramic piece 2, makes piezoelectric ceramics 2 one ends directly be attached to the bottom of probing shell inner chamber 10, and terminal block 3 is close to piezoelectric ceramics 2 other ends, and with probing shell 1 insulation, briquetting 5 compresses piezoelectric ceramic piece 2, places insulating material 4 between piezoelectric ceramics 2 and briquetting 5, and briquetting and housing are welded as a whole or wringing fit, lead 6 and 8 is drawn from briquetting 5 and terminal block 3 respectively, and 7 are capping.Piezoelectric ceramics disk 2 also can adopt the structure of Fig. 9 and Figure 11, two opposite polarity piezoelectric ceramics disks 2 are put into simultaneously the inner chamber 10 of probing shell 1, wherein terminal block 3 is between two piezoelectric ceramics disks 2, probing shell 1 and briquetting 5 join with the other two ends of piezoelectric ceramics disk 2 respectively, piezoelectric ceramics 2 is by insulating material 4 and probing shell 1 insulation, in the probing shell inner chamber, also can place the multi-disc piezoelectric ceramic piece as required, basis is novel to be exemplified no longer one by one, the user can select the piezoelectric ceramics disk as required, make an end of piezoelectric ceramics disk draw lead, the other end is drawn another lead by briquetting and housing, can satisfy this novel request for utilization.
Figure 14 and Figure 15 are respectively the mounting structure synoptic diagram that adopts a slice piezoelectric ceramics disk and two piezoelectric ceramics disks, and F is for being subjected to force direction, and P is the piezoelectric ceramics polarised direction.
Fig. 5 is this novel a kind of embodiment in actual use, the structural representation of the intelligent vortex shedding flowmeter after promptly improving, and wherein 01 is the table body, and 02 is triangle bumping post body, and 03 and 05 is sealing gasket, and 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 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, 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: the piezoelectric ceramics disk also can adopt puts into probing shell simultaneously with two opposite piezoelectric ceramics of polarised direction, wherein terminal block is between two piezoelectric ceramics disks, probing shell and briquetting join with the other two ends of piezoelectric ceramics disk respectively, and the piezoelectric ceramics disk is by insulating material and probing shell insulation.
3. vortex street flowmeter sensor according to claim 1 is characterized in that: also can place multi-disc piezoelectric ceramics disk as required in the probing shell inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01261173 CN2535777Y (en) | 2001-09-10 | 2001-09-10 | Novel vortex-streat flow meter sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01261173 CN2535777Y (en) | 2001-09-10 | 2001-09-10 | Novel vortex-streat flow meter sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2535777Y true CN2535777Y (en) | 2003-02-12 |
Family
ID=33669162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01261173 Expired - Lifetime CN2535777Y (en) | 2001-09-10 | 2001-09-10 | Novel vortex-streat flow meter sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2535777Y (en) |
-
2001
- 2001-09-10 CN CN 01261173 patent/CN2535777Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Patentee address after: 201707, Shanghai Qingpu Industrial Park, 575 new water channel Shanghai starry sky Automatic Instrument Co., Ltd. Patentee address before: 200070, Yongxing, Shanghai, 18 small road, Kai International Building, 6A, Shanghai starry sky Instrument Factory |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110910 Granted publication date: 20030212 |