CN103438941A - General vortex shedding flow sensor - Google Patents
General vortex shedding flow sensor Download PDFInfo
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- CN103438941A CN103438941A CN2013103547595A CN201310354759A CN103438941A CN 103438941 A CN103438941 A CN 103438941A CN 2013103547595 A CN2013103547595 A CN 2013103547595A CN 201310354759 A CN201310354759 A CN 201310354759A CN 103438941 A CN103438941 A CN 103438941A
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- piezoelectric crystal
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Abstract
The invention discloses a general vortex shedding flow sensor which comprises a sensor core column, wherein piezoelectric crystals and signal electrode plates are pasted on two sides of the sensor core column; a sensor probe and a lower end cover are respectively sleeved at two ends of the sensor core column; an armored wire is led out from the center hole of the lower end cover; an inner lead of the armored wire is connected with the sensor core column; an upper end cover is sleeved on the armored wire, a plurality of seal glass particles are filled in the upper end covers, the tail end of the armored wire is divided into a plurality of output leads, and the tail ends of the plurality of output leads are respectively connected with wiring terminals. The general vortex shedding flow sensor has the advantages of good fabrication properties, high detection sensitivity, excellent high temperature resistance, long service life, less damage possibility and good shaking resistance.
Description
technical field:
The invention belongs to field of flow meters, but the general vortex flow sensors of the various media such as a kind of measurement gas, liquid and steam particularly.
background technology:
Vortex shedding flow meter is the flow instrument of widely used a kind of electromechanical integration during modern industry is produced, and is widely used in the flow measurement of measurement gas, steam and liquid, has the advantages such as flow range is wide, precision is high, media general is good, temperature resistant range is wide.
Substantially be divided into two kinds at present common vortex shedding flow meter structure, a kind of is the vortex shedding flow meter that sensor and vortex shedder are integrated the type structure, the size sensor that each bore of the vortex shedding flow meter of this structure is supporting and size are not identical, therefore sensor material and processing cost are high, bigbore sensor difficulty of processing is also large, and sensitivity is not high yet; Another kind of structure be that sensor and vortex shedder are Split type structures, but the general sensor of this structure can not be realized versatility fully, often at the sensor of three ~ five kinds of specifications, could meet and support the use, there are following several point defects in sensor itself in addition: the one, and the Curie temperature of piezoelectric used is not high, the non-refractory of the sensor of making own; The 2nd, sensor generally adopts high temperature glue or epoxy encapsulation, and the easy ageing failure of sensor and life-span are short; The 3rd, sensor lead mostly is and adopts the soft high temperature wire with the first day of the lunar month material insulating sheath, the sensor non-refractory of this form, easily aging, poor sealing performance, antinoise signal disturbs and anti-shake performance is poor.
summary of the invention:
The objective of the invention is, in a kind of general vortex flow sensors of design, to there is processing technology good, the advantage such as detection sensitivity is high, and resistance to elevated temperatures is good, and long service life is not fragile, and anti-shake performance is good.
The technical solution used in the present invention is:
A kind of general vortex flow sensors, it is characterized in that: include the sensor core post, the both sides of sensor core post are bonded with piezoelectric crystal, the signal electrode sheet, formed sensor module, sensor module is set in sensor probe by the two ends of core body post, by the lower end lid, fixed, the armouring wire is introduced from the center pit of lower end lid, the internal lead of armouring wire is connected with sensor module, be set with the upper end cover on the armouring wire, fill some sealing glass in the cover of upper end, the end of armouring wire separates several output leads, the end of several output leads connects respectively connection terminal.
Described a kind of general vortex flow sensors is characterized in that: described piezoelectric crystal adopts 2 or the 4 lithium niobate piezoelectric crystal plates that length is 10-30mm.
Described a kind of general vortex flow sensors is characterized in that: described signal electrode sheet adopts the signal electrode sheet of 2 pure nickel materials.
Described a kind of general vortex flow sensors is characterized in that: the length of described armouring wire is 50-500mm, and inside is the wire of 2-3 core pure nickel wire.
Described a kind of general vortex flow sensors is characterized in that: the unleaded sealing glass that described sealing glass adopts fusion temp to be greater than 400 ℃.
Described a kind of general vortex flow sensors, it is characterized in that: described sensor probe adopts the metal material of high-quality stainless steel or other corrosion-and high-temp-resistants to make, the sensor probe structure for thickness, be flange-type mount pad more than 8mm in the blind pipe shape sonde body of multistage shoulder hole is arranged.
Described a kind of general vortex flow sensors is characterized in that: described sensor core post is that two ends are that the right cylinder centre is the abnormally-structured core body post of flat strip shaped, the plane that the interlude both sides are strip.
Described a kind of general vortex flow sensors is characterized in that: between the plane of described signal electrode sheet and piezoelectric crystal, piezoelectric crystal and sensor core post both sides, adopt high temperature silver slurry sintering process more than 800 ℃ that piezoelectric crystal and electrode slice are bonded in two side planes of sensor core post.
Described a kind of general vortex flow sensors, it is characterized in that: described sintering adhesive bonding well in pairs the sensor core post of piezoelectric crystal and signal electrode sheet press fit in the shoulder hole in the sensor probe body, two sector hole interference fit of the cylindrical section axle at sensor stem stem body two ends and shoulder hole.
Advantage of the present invention is:
Processing technology of the present invention is good, detection sensitivity is high, resistance to elevated temperatures is good, and long service life is not fragile, anti-shake performance is good, the vortex shedding flow meter measuring flow range ability of supporting this sensor is wide, and the temperature range of measuring media is wide and high, and the product overall performance is good, the key components and parts standardization level of product is high, universal strong, simple and reliable for structure, and machine life is long.
the accompanying drawing explanation:
Fig. 1 is structural representation of the present invention.
The A-A view that Fig. 2 is Fig. 1.
Number in the figure:
1, sensor probe 2, core body post 3, piezoelectric crystal 4, signal electrode sheet 5, internal lead 6, lower end lid 7, armouring wire 8, upper end cover 9, sealing glass 10, output lead 11, connection terminal.
embodiment:
As Fig. 1, 2, a kind of general vortex flow sensors, include sensor core post 2, the both sides of sensor core post 2 are bonded with piezoelectric crystal 3, signal electrode sheet 4, the two ends of sensor core post 2 are set with sensor probe 1 are installed, lower end lid 6, armouring wire 7 is drawn from the center pit of lower end lid 6, the internal lead 6 of armouring wire 7 is connected with sensor core post 2, be set with upper end cover 8 on armouring wire 7, fill some sealing glass 9 in upper end cover 8, the end of armouring wire 7 separates several output leads 10, the end of several output leads 10 connects respectively connection terminal 11.
The length of armouring wire 7 is 50-500mm, and inside is the wire of 2-3 core pure nickel wire.
The unleaded sealing glass that sealing glass 9 adopts fusion temp to be greater than 400 ℃.
Sensor probe 1 adopts the metal material of high-quality stainless steel or other corrosion-and high-temp-resistants to make, sensor probe 1 structure for thickness, be flange-type mount pad more than 8mm in the blind pipe shape sonde body of multistage shoulder hole is arranged.
Between the plane of signal electrode sheet 3 and piezoelectric crystal 4, piezoelectric crystal 4 and sensor core post 2 both sides, adopt high temperature silver slurry sintering process more than 800 ℃ that piezoelectric crystal and electrode slice are bonded in two side planes of sensor core post 2.
Sintering adhesive bonding well in pairs the sensor core post 2 of piezoelectric crystal 3 and signal electrode sheet 4 press fit in the shoulder hole in sensor probe 1 body, the cylindrical section axle at sensor stem stem body 2 two ends and two sector hole interference fit of shoulder hole.
Claims (9)
1. a general vortex flow sensors, it is characterized in that: include the sensor core post, the both sides of sensor core post are bonded with piezoelectric crystal, the signal electrode sheet, formed sensor module, sensor module is set in sensor probe by the two ends of core body post, by the lower end lid, fixed, the armouring wire is introduced from the center pit of lower end lid, the internal lead of armouring wire is connected with sensor module, be set with the upper end cover on the armouring wire, fill some sealing glass in the cover of upper end, the end of armouring wire separates several output leads, the end of several output leads connects respectively connection terminal.
2. a kind of general vortex flow sensors according to claim 1, is characterized in that: 2 or 4 lithium niobate piezoelectric crystal plates that described piezoelectric crystal employing length is 10-30mm.
3. a kind of general vortex flow sensors according to claim 1, is characterized in that: the signal electrode sheet of 2 pure nickel materials of described signal electrode sheet employing.
4. a kind of general vortex flow sensors according to claim 1, it is characterized in that: the length of described armouring wire is 50-500mm, inside is the wire of 2-3 core pure nickel wire.
5. a kind of general vortex flow sensors according to claim 1, is characterized in that: the unleaded sealing glass that described sealing glass adopts fusion temp to be greater than 400 ℃.
6. a kind of general vortex flow sensors according to claim 1, it is characterized in that: described sensor probe adopts the metal material of high-quality stainless steel or other corrosion-and high-temp-resistants to make, the sensor probe structure for thickness, be flange-type mount pad more than 8mm in the blind pipe shape sonde body of multistage shoulder hole is arranged.
7. a kind of general vortex flow sensors according to claim 1 is characterized in that: described sensor core post is that two ends are in the middle of right cylinder to be the abnormally-structured core body post of flat strip shaped, the plane that the interlude both sides are strip.
8. a kind of general vortex flow sensors according to claim 1, is characterized in that: between the plane of described signal electrode sheet and piezoelectric crystal, piezoelectric crystal and sensor core post both sides, adopt high temperature silver slurry sintering process more than 800 ℃ that piezoelectric crystal and electrode slice are bonded in two side planes of sensor core post.
9. according to claim 1 or 6 or 8 described a kind of general vortex flow sensors, it is characterized in that: described sintering adhesive bonding well in pairs the sensor core post of piezoelectric crystal and signal electrode sheet press fit in the shoulder hole in the sensor probe body, two sector hole interference fit of the cylindrical section axle at sensor stem stem body two ends and shoulder hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103547595A CN103438941A (en) | 2013-08-14 | 2013-08-14 | General vortex shedding flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103547595A CN103438941A (en) | 2013-08-14 | 2013-08-14 | General vortex shedding flow sensor |
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| CN103438941A true CN103438941A (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013103547595A Pending CN103438941A (en) | 2013-08-14 | 2013-08-14 | General vortex shedding flow sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU197044U1 (en) * | 2019-11-29 | 2020-03-26 | Акционерное общество "Промышленная группа "Метран" (АО "ПГ "Метран") | VORTEX CONVERTER WITH INTEGRATED FLANGE |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4625564A (en) * | 1983-12-02 | 1986-12-02 | Oval Engineering Co., Ltd. | Vortex flow meter |
| CN1156820A (en) * | 1995-08-07 | 1997-08-13 | 株式会社椭圆 | Vortex flow meter detector and vortex flow meter |
| CN2526812Y (en) * | 2002-03-08 | 2002-12-18 | 欧阳汉良 | Piezoelectric crystal sensor |
| JP2005114643A (en) * | 2003-10-10 | 2005-04-28 | Oval Corp | Vortex flowmeter |
| CN201463938U (en) * | 2009-05-27 | 2010-05-12 | 天津大学 | Three-wire common-ground type vortex probe |
| CN203405237U (en) * | 2013-08-14 | 2014-01-22 | 合肥精大仪表股份有限公司 | Universal vortex street flow sensor |
-
2013
- 2013-08-14 CN CN2013103547595A patent/CN103438941A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4625564A (en) * | 1983-12-02 | 1986-12-02 | Oval Engineering Co., Ltd. | Vortex flow meter |
| CN1156820A (en) * | 1995-08-07 | 1997-08-13 | 株式会社椭圆 | Vortex flow meter detector and vortex flow meter |
| CN2526812Y (en) * | 2002-03-08 | 2002-12-18 | 欧阳汉良 | Piezoelectric crystal sensor |
| JP2005114643A (en) * | 2003-10-10 | 2005-04-28 | Oval Corp | Vortex flowmeter |
| CN201463938U (en) * | 2009-05-27 | 2010-05-12 | 天津大学 | Three-wire common-ground type vortex probe |
| CN203405237U (en) * | 2013-08-14 | 2014-01-22 | 合肥精大仪表股份有限公司 | Universal vortex street flow sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU197044U1 (en) * | 2019-11-29 | 2020-03-26 | Акционерное общество "Промышленная группа "Метран" (АО "ПГ "Метран") | VORTEX CONVERTER WITH INTEGRATED FLANGE |
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Application publication date: 20131211 |