CN2569106Y - Integrally pressed capacitor type probe vortex street flow sensor - Google Patents
Integrally pressed capacitor type probe vortex street flow sensor Download PDFInfo
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- CN2569106Y CN2569106Y CN 02275381 CN02275381U CN2569106Y CN 2569106 Y CN2569106 Y CN 2569106Y CN 02275381 CN02275381 CN 02275381 CN 02275381 U CN02275381 U CN 02275381U CN 2569106 Y CN2569106 Y CN 2569106Y
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- electrode
- flange
- probe
- press
- flow sensors
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Abstract
The utility model relates to an integrally pressed capacitor type probe vortex street flow sensor, which relates to a sensor for measuring media flow in a pipeline, such as liquid, gas, steam, etc. The utility model comprises a tubular housing, a vortex generating body vertically fixed at the center point of the tubular housing and a probe, wherein, the probe is of an integrally pressed type structure, which comprises an electrode frame, of which the bottom is provided with two metal electrodes, a tubular movable electrode with sealed bottom, a press cover, screws, a fixing seat and a sealing pad; the upper end of the movable electrode is connected with a movable electrode flange; the upper end of the electrode frame arranged in the inner hole of the movable electrode is connected with an electrode frame flange which is positioned above the movable electrode flange; the electrode frame flange and the movable electrode flange are tightly pressed in a groove between the fixing seat and the press cover; the lower side of the movable electrode flange is provided with the sealing pad; the fixing seat and the press cover are connected together by the screws. The probe of the utility model is of an integrally pressed type, and thus the utility model has the advantages of high sensitivity, good shock resistance, low measuring lower limit, high accuracy, good sealing and convenient assembly and disassembly.
Description
Technical field:
The utility model relates to a kind of sensor that is used for rate-of flows such as liquid, gas and steam in the measuring channel.
Background technology:
The vortex flow sensors that utilizes the Karman vortex street principle to make, have other type flow sensor many advantages that can not have concurrently simultaneously, more and more paid close attention to by people, since vortex flow sensors comes out, people have carried out unremitting effort and research to its detection mode and structure, make in the wide field of its rate-of flow in measuring channel and have given play to unprecedented effect.Conventional piezoelectric formula detection mode, anti-seismic performance and resistance to elevated temperatures are poor, are well-known.And capacitance probe vortex flow sensors in the past, be that two metal fixed electordes are packed on the metal fixed electorde support, put in the public moving electrode, pass through metal backup shoe, with several circumferential screws the two is pressed on the correlation plane on sensor housing top, this sealing structure effect is bad, and parameter easily changes influence to be measured, and inconvenient on-the-spot dismounting.
Summary of the invention:
The utility model press-fits the capacitance probe vortex flow sensors for the sealing effectiveness problem poor, inconvenient on-the-spot dismounting that solves existing vortex flow sensors existence designs a kind of integral body.Integral body of the present utility model press-fits the capacitance probe vortex flow sensors and comprises tubular shell 9, vertical fixing in vortex generation body 8, the probe 4 of tubular shell 9 centers, and probe 4 is whole pressing type structure, and it comprises the bottom two metal electrode 4A are installed
3C-1And 4A
3C-2Electrode suppor 4A, tubular moving electrode 4B, the gland 4-3 of base seal, screw 4-4, holder 4-5, sealing gasket 4-6, the upper end of moving electrode 4B is connected with moving electrode flange 4C, the upper end that is arranged on the electrode suppor 4A in the moving electrode 4B endoporus is connected with electrode suppor flange 4D, electrode suppor flange 4D is positioned at above the moving electrode flange 4C, electrode suppor flange 4D and moving electrode flange 4C are pressed among the groove 4-7 between holder 4-5 and the gland 4-3, be provided with sealing gasket 4-6 below moving electrode flange 4C, screw 4-4 links together holder 4-5 and gland 4-3.The probe 4 of sensor of the present utility model is whole pressing type, thus have highly sensitive, shock resistance good, measurement lower limit is low, accuracy is high, good airproof performance, easy-to-mount advantage.This sensor can be measured the fluid flow of 450 ℃ of high temperature, has market application foreground extremely widely.
Description of drawings: Fig. 1 is the integral installation figure of flow sensor in the embodiment, and Fig. 2 is the integral installation figure of probe 4, and Fig. 3 is the inner structure synoptic diagram of moving electrode 4B, and Fig. 4 is the E-E cut-open view of Fig. 3.
Embodiment: the integral body of (consulting Fig. 1 to Fig. 4) present embodiment press-fits the capacitance probe vortex flow sensors and is made up of probe 4, screw 5, screw 6, sealing gasket 7, vortex generation body 8, the tubular shell 9 of the housing 1 that signal processing circuit is housed, screw 2, standpipe 3, whole pressing type.Probe 4 is made up of shielded cable 4-1, cable protecting tube 4-2, gland 4-3, screw 4-4, holder 4-5, sealing gasket 4-6, electrode suppor 4A, moving electrode 4B.Moving electrode 4B is the tubular-shaped structures of lower end closed, and the lower end place of moving electrode 4B is the flat structure, with the better alternation pulsating force of experiencing vortex street.Electrode suppor 4A is arranged in the endoporus of moving electrode 4B, the top 4A of electrode suppor 4A
1Closely cooperate with the cylindrical bore of moving electrode 4B, play positioning action.The bottom 4A of electrode suppor 4A
3Outside surface be set with insulation sleeve 4A
3C, at insulation sleeve 4A
3CFixed outside be connected with metal electrode 4A
3C-1With metal electrode 4A
3C-2, two metal electrodes can also be that metal film is plated in insulation sleeve 4A
3CLast formation.Two metal electrode 4A
3C-1And 4A
3C-2And form the gap between the barrel of moving electrode 4B, thereby realize differential capacitor change detection mode.Be connected with electrode suppor flange 4D in the upper end of electrode suppor 4A, the upper end of moving electrode 4B is connected with moving electrode flange 4C, electrode suppor flange 4D be positioned at moving electrode flange 4C above, electrode suppor flange 4D and moving electrode flange 4C are pressed among the groove 4-7 between holder 4-5 and the gland 4-3, be provided with sealing gasket 4-6 below moving electrode flange 4C, screw 4-4 links together holder 4-5 and gland 4-3.The lower end of two shielded cable 4-1 that are connected with signal processing circuit respectively with metal electrode 4A
3C-1And 4A
3C-2Be connected, the lower end that is enclosed within the cable protecting tube 4-2 of shielded cable 4-1 outside is threaded with the center pit of gland 4-3.The probe 4 of whole pressing type by screw 6 be fixedly connected on tubular shell 9 above.The center of vortex generation body 8 vertical fixing in tubular shell 9, the lower end of probe 4 is positioned at the side of vortex generation body 8 with respect to fluid flow direction.Standpipe 3 be sleeved on probe 4 above, standpipe 3 is fixedlyed connected with tubular shell 9 by screw 5.The housing 1 of dress signal processing circuit in the upper end of standpipe 3 is fixedly connected with.It is fine that this sensor has the scene of vibrations and high temperature scene, 400 ℃ of left and right sides all to use at pipeline, and existing is that φ 150mm is an example with the tubulose latus rectum, external diameter φ 174mm, flange outer diameter φ 285mm, vortex generation body fluoran stream surface width 42mm, probe external diameter φ 11mm detects and demarcates back meter constant 350.8482N/m
3, 0.5 grade of class of accuracy.
Principle of work of the present utility model is: when fluid flows through with certain speed, behind vortex generation body 8, just produce Karman vortex street, both sides produce pressure fluctuation, cause cantilever-type to be installed in integral body behind the vortex generation body 8 and press-fit capacitance probe moving electrode barrel and experience the effect of an alternating force and pulse, make two fixed electorde 4A that are contained in the moving electrode 4B
3C-1, 4A
3C-2And just form the differential capacitance conversion between moving electrode 4B, the electric capacity treatment circuit carries out periodicity to these two electric capacity respectively and discharges and recharges, and utilize charge amplifying circuit that this two-way charge signal is changed into magnitude of voltage, by differential amplifier circuit the voltage difference of this two-way is amplified again, and then through filtering, amplitude limit amplification, shaping, export the pulse duration frequency signal that is directly proportional with the frequency of measured flux signal at last, thereby realized purpose flow detection.
Claims (8)
1, integral body press-fits the capacitance probe vortex flow sensors, it comprises tubular shell (9), vertical fixing in vortex generation body (8), the probe (4) of tubular shell (9) center, it is characterized in that probe (4) is whole pressing type structure, it comprises the bottom two metal electrode (4A is installed
3C-1) and (4A
3C-2) electrode suppor (4A), the tubular moving electrode (4B) of base seal, gland (4-3), screw (4-4), holder (4-5), sealing gasket (4-6), the upper end of moving electrode (4B) is connected with moving electrode flange (4C), the upper end that is arranged on the electrode suppor (4A) in moving electrode (4B) endoporus is connected with electrode suppor flange (4D), electrode suppor flange (4D) is positioned at above the moving electrode flange (4C), electrode suppor flange (4D) and moving electrode flange (4C) are pressed in the groove (4-7) between holder (4-5) and the gland (4-3), be provided with sealing gasket (4-6) below moving electrode flange (4C), screw (4-4) links together holder (4-5) and gland (4-3).
2, integral body according to claim 1 press-fits the capacitance probe vortex flow sensors, and the lower end place that it is characterized in that moving electrode (4B) is the flat structure.
3, integral body according to claim 1 press-fits the capacitance probe vortex flow sensors, it is characterized in that the top (4A of electrode suppor (4A)
1) closely cooperate with the cylindrical bore of moving electrode (4B).
4, integral body according to claim 1 press-fits the capacitance probe vortex flow sensors, it is characterized in that the bottom (4A of electrode suppor (4A)
3) outside surface be set with insulation sleeve (4A
3C), at insulation sleeve (4A
3C) fixed outside be connected with metal electrode (4A
3C-1) and metal electrode (4A
3C-2).
5, press-fit the capacitance probe vortex flow sensors according to claim 1 or 4 described integral body, it is characterized in that two metal electrode (4A
3C-1) and (4
3C-2) and the barrel of moving electrode (4B) between form the gap.
6, integral body according to claim 1 press-fits the capacitance probe vortex flow sensors, the probe (4) that it is characterized in that whole pressing type by screw (6) be fixedly connected on tubular shell (9) above.
7, integral body according to claim 6 press-fits the capacitance probe vortex flow sensors, it is characterized in that standpipe (3) be sleeved on probe (4) above, standpipe (3) is fixedlyed connected with tubular shell (9) by screw (5).
8, integral body according to claim 7 press-fits the capacitance probe vortex flow sensors, it is characterized in that the housing (1) of dress signal processing circuit in the upper end of standpipe (3) is fixedly connected with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02275381 CN2569106Y (en) | 2002-09-20 | 2002-09-20 | Integrally pressed capacitor type probe vortex street flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02275381 CN2569106Y (en) | 2002-09-20 | 2002-09-20 | Integrally pressed capacitor type probe vortex street flow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2569106Y true CN2569106Y (en) | 2003-08-27 |
Family
ID=33739443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02275381 Expired - Fee Related CN2569106Y (en) | 2002-09-20 | 2002-09-20 | Integrally pressed capacitor type probe vortex street flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2569106Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022127160A1 (en) | 2022-10-18 | 2024-04-18 | Endress+Hauser Flowtec Ag | Sensor element |
| DE102022131694A1 (en) | 2022-11-30 | 2024-06-06 | Endress+Hauser Flowtec Ag | Capacitive sensor assembly for a field device and field device |
-
2002
- 2002-09-20 CN CN 02275381 patent/CN2569106Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022127160A1 (en) | 2022-10-18 | 2024-04-18 | Endress+Hauser Flowtec Ag | Sensor element |
| DE102022131694A1 (en) | 2022-11-30 | 2024-06-06 | Endress+Hauser Flowtec Ag | Capacitive sensor assembly for a field device and field device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |