CN1512145A - Inductive float flow transmitter - Google Patents
Inductive float flow transmitter Download PDFInfo
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- CN1512145A CN1512145A CNA021589917A CN02158991A CN1512145A CN 1512145 A CN1512145 A CN 1512145A CN A021589917 A CNA021589917 A CN A021589917A CN 02158991 A CN02158991 A CN 02158991A CN 1512145 A CN1512145 A CN 1512145A
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- float
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- comparer
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Abstract
The inductive float flow transmitter includes tube, orifice plate, float and guide rod as well as measuring coil, external resistor, comparator and signal processor. The measuring coil around the tube and the external resistor are connected serially to constitute one charge and discharge branch with one end connected to ground and the other end to the output of the signal processor. The comparator has its input connected to the joint between the measuring coil and the external resistor and output connected the input of the signal processor. The signal processor controls the charge and the discharge of the branch and processes the output of the comparator before output. The transmitter needs no magnetism of the float and thus no magnetic filter eliminating impurity.
Description
Technical field
The present invention relates to the flowmeter of measuring media flow, more specifically refer to a kind of induction type float flow transmitter.
Background technology
The flow transmitter of existing metal tube magnetic suspended body flowmeter comprises sensor and displacement transducer, wherein, sensor is a core structure, and as shown in Figure 1, guiding mechanism 11 is a guide pole, guide pole is fixed in the two ends up and down of cylindrical shell 10, orifice plate 13 is installed in the cylindrical shell 10, and guide pole 11 passes float 12, and magnetic float 12 slides up and down along guide pole 11, magnetic float 12 tapered bodies, the upper end of guide pole 11 also is provided with buffer spring 14.Displacement transducer 15 effects are that displacement is converted to electric signal.The principle of work of this transmitter is, when magnetic float 12 when rising or descend, cause managing outer magnetic force-displacement transducer work, become displacement, displacement transducer changes this displacement into electric signal again, promptly, its process is: magnetic-displacement-electric signal, twice signal transformation before and after this mode, each conversion of signals all can be brought additional error, the flow transmitter of this structure, because magnetic float 12 moving up and down in cylindrical shell 10, magnetic float 12 can adsorb ferromagnetism impurity, thereby also influence the result who measures, address this problem, common way is to increase magnetic filter to remove impurity in sensor now, but does not tackle the problem at its root.
Summary of the invention
The objective of the invention is the problems referred to above of existing at the flow transmitter of traditional metal tube magnetic suspended body flowmeter, a kind of measuring accuracy height is provided, need not to increase the induction type float flow transmitter of magnetic filter.
To achieve these goals, the present invention adopts following technical scheme:
This induction type float flow transmitter comprises cylindrical shell, orifice plate, float, guiding mechanism,
Orifice plate is installed in the cylindrical shell;
Guiding mechanism is a guide pole, and guide pole is fixed in the two ends up and down of cylindrical shell, and the upper end of guide pole is provided with buffer spring;
The tapered body of float, float is placed through on the guide pole;
In addition, this transmitter also comprises measures coil L, outer meeting resistance R, comparer A, signal processor, wherein, measure the outside that coil L is surrounded on cylindrical shell, measurement coil L is connected in series formation one mutually with outer meeting resistance R and discharges and recharges branch road, this branch road one end ground connection, the other end is connected to signal processor output, the input termination slotted line circle L of comparer A and the contact that links to each other of outer meeting resistance, the output terminal of comparer A and the input end of signal processor join, signal processor control discharges and recharges discharging and recharging branch road, and the level of the output of comparer A changed carries out timing and handle back output;
Described float adopts metal floater.
Described signal processor is to discharging and recharging branch road compartment of terrain output high level signal, and described comparer output comparative level is given the input end of signal processor.
Described measurement coil L contains two groups of coils, outer meeting resistance contains two resistance, comparer also comprises two, each group coil all is connected in series formation one with resistance and discharges and recharges branch road, the input termination slotted line circle L of each comparer and the contact that links to each other of outer meeting resistance, the input end of output terminal and signal processor joins.
Described measurement coil also is arranged with protection tube outward.
Described float can be made up of ferromagnetic material, also can be made up of copper, aluminium, titanium.
Described float also can be made of cupric, aluminium, steel, titanium, magnetic ferrites material in the plastics.
Because induction type float flow transmitter of the present invention comprises cylindrical shell, orifice plate, float, guide pole, it also comprises measures coil L, outer meeting resistance R, comparer A, signal processor, wherein, measure the outside that coil L is surrounded on cylindrical shell, measurement coil L is connected in series formation one mutually with outer meeting resistance R and discharges and recharges branch road, this branch road one end ground connection, the other end is connected to signal processor output, the input termination slotted line circle L of comparer A and the contact that links to each other of outer meeting resistance, the output terminal of comparer A and the input end of signal processor join, signal processor control discharges and recharges discharging and recharging branch road, and the level of the output of comparer A changed carries out timing and handle back output.Therefore, the time that this transmitter can pass through the input signal of measuring-signal processor input end changes, and learns the size of the inductance value of coil, according to the variation of the inductance value of measuring coil, determines float position, thereby measures the size of flow again.Measurement does not relate to magnetic float, can not adsorb ferromagnetic material, and not needing to rely on increases magnetic filter removal impurity, can tackle the problem at its root; In addition, measuring the coil conduct is an inductance element of charging circuit, and is discontinuous operation, and average power consumption is extremely low, thermally-stabilised problem can not occur; The different measuring coil carries out timesharing to be measured, and can not produce interference between mutually.
Description of drawings
Fig. 1 is traditional float flow transmitter structural representation.
Fig. 2 is a flow transmitter structural representation of the present invention.
Fig. 3 is one of flow transmitter electricity principle schematic of the present invention.
Fig. 4 is two of flow transmitter electricity principle schematic of the present invention.
Fig. 5 is the another structural representation of flow transmitter of the present invention.
Fig. 6 is a flow transmitter of the present invention structural representation again.
Embodiment
See also shown in Figure 2ly, this induction type float flow transmitter comprises cylindrical shell 20, orifice plate 23, float 22, guiding mechanism 21.
Orifice plate 23 is installed in the cylindrical shell 20;
Guiding mechanism 21 is a guide pole, and guide pole is fixed in the two ends up and down of cylindrical shell 20, and the upper end of guide pole is provided with buffer spring 24;
Float 22 tapered bodies, float 22 is placed through on the guide pole;
In addition, please again in conjunction with shown in Figure 3, this transmitter also comprises measures coil L, outer meeting resistance R, comparer A, signal processor, wherein, measure the outside that coil L is surrounded on cylindrical shell 20, measurement coil L is connected in series formation one RL mutually with outer meeting resistance R and discharges and recharges branch road, this branch road one end ground connection, the other end is connected to signal processor output, the input termination slotted line circle L of comparer A and the contact that links to each other of outer meeting resistance, the output terminal of comparer A and the input end of signal processor join, and signal processor control discharges and recharges branch road to RL and discharges and recharges, and the high level of the output of comparer A is carried out timing and handles back output;
Described float 22 adopts metal floater.
Described signal processor discharges and recharges branch road compartment of terrain output high level signal to RL, and described comparer A output comparative level is given the input end of signal processor.
Please continue to consult shown in Figure 4, described measurement coil L contains two groups of coils, that is, and and last coil L1 and lower coil L2.Outer meeting resistance R contains two resistance R 1 and R2, comparer also comprises two comparer A1 and A2, each group coil all is connected in series formation one RL with resistance and discharges and recharges branch road, the input termination slotted line circle L of each comparer and the contact that links to each other of outer meeting resistance, the reverse input end of comparer A1, A2 all meets a reference level Vref, and the input end of output terminal and signal processor joins.
Described measurement coil L1, L2 also are arranged with protection tube 25 outward.
In transmitter of the present invention, will be converted to electric signal after the processing of the upper and lower displacement amount of float 22 in cylindrical shell 20 by measurement coil L, outer meeting resistance R, comparer A, signal processor, this electric signal is the output of transmitter.Its principle is, when the output terminal out of signal processor exports a high level, measure coil and then produce an anti-phase electromotive force, when moment, the level at coil two ends is uprised by low, and when this level was higher than reference level Vref, comparer was then exported high level, the input end IN of signal processor is a high level also, and signal processor picks up counting; When the level at coil two ends during by high step-down (when anti-phase electromotive force disappears), the in-phase input end level of comparer is by high step-down, when this level is lower than the reference level Vref of inverting input, the output terminal of comparer also becomes low level, signal processor is when capturing this variation, stop timing, and to handling during this period of time.
Because the different induction amount of coil, the resulting time of signal processor is also different, this time that discharges and recharges that also is RL charges and discharge circuit holds and levies, the time of the signal of input that therefore can be by surveying reason signal processor input end IN changes, and learns the size of the inductance value of coil, and the interior float height of the size of inductance value and cylindrical shell 20 is relevant, the variation of float height is then relevant with tested flow again, therefore, as long as, just learn the size of flow by measuring the variation of the inductance value of measuring coil.
According to above-mentioned description as can be known, in the present invention, measuring coil float itself is exactly sensing element, measures coil as being an inductance element of charging circuit, and the working time is extremely short, and is discontinuous operation, and average power consumption is extremely low, thermally-stabilised problem can not occur; In addition, the different measuring coil carry out time-sharing charging timesharing measure, can not produce interference between mutually, by measuring the variation of charging rate,, change thereby measure float position to determine the variation of inductance value, determine the size of flow.
Described float 22 can be made up of ferromagnetic material, also can be made up of copper, aluminium, titanium.
Described float 22 also can be made of cupric, aluminium, steel, titanium, magnetic ferrites material in the plastics.
Please continue to consult shown in Figure 5, flow transmitter of the present invention is one to have upper and lower countervane 26,27 structures applicable to guiding mechanism also, and upper and lower countervane 26,27 is individually fixed in float 22 upper/lower terminals.
At last, see also shown in Figure 6ly, in transmitter of the present invention, an active section 29 also can be designed to the tapering that can adapt with the tapering of float 22 in the inwall of cylindrical shell 20.
Transmitter of the present invention is a flow size of determining fluid to be measured by the change in location of measuring float, more directly say, the position of its energy measurement float, therefore, it also is a kind of (float) displacement transducer, perhaps be the float-type fluid level transmitter, its structure is roughly the same, only lacks an orifice plate.
Claims (8)
1, a kind of induction type float flow transmitter, this transmitter comprises cylindrical shell, orifice plate, float, guiding mechanism,
Orifice plate is installed in the cylindrical shell;
Guiding mechanism is a guide pole, and guide pole is fixed in the two ends up and down of cylindrical shell, and the upper end of guide pole is provided with buffer spring;
The tapered body of float, float is placed through on the guide pole;
It is characterized in that:
This transmitter also comprises measures coil L, outer meeting resistance R, comparer A, signal processor, wherein, measure the outside that coil L is surrounded on cylindrical shell, measurement coil L is connected in series formation one mutually with outer meeting resistance R and discharges and recharges branch road, this branch road one end ground connection, the other end is connected to signal processor output, the input termination slotted line circle L of comparer A and the contact that links to each other of outer meeting resistance, the output terminal of comparer A and the input end of signal processor join, signal processor control discharges and recharges discharging and recharging branch road, and the high level of the output of comparer A is carried out timing and handles back output;
Described float adopts metal floater.
2, induction type float flow transmitter as claimed in claim 1 is characterized in that: described signal processor is to discharging and recharging branch road compartment of terrain output high level signal, and described comparer output comparative level is given the input end of signal processor.
3, induction type float flow transmitter as claimed in claim 1, it is characterized in that: described measurement coil L contains two groups of coils, outer meeting resistance contains two resistance, comparer also comprises two, each group coil all is connected in series formation one with resistance and discharges and recharges branch road, the input termination slotted line circle L of each comparer and the contact that links to each other of outer meeting resistance, the input end of output terminal and signal processor joins.
4, as claim 1 or 3 described induction type float flow transmitters, it is characterized in that: described measurement coil also is arranged with protection tube outward.
5, induction type float flow transmitter as claimed in claim 1, it is characterized in that: described float can be made up of ferromagnetic material, also can be made up of copper, aluminium, titanium.
6, induction type float flow transmitter as claimed in claim 1 is characterized in that: described float also can be made of cupric, aluminium, steel, titanium, magnetic ferrites material in the plastics.
7, induction type float flow transmitter as claimed in claim 1 is characterized in that: described guiding mechanism is one to have upper and lower countervane structure, and upper and lower countervane is individually fixed in the float upper/lower terminal.
8, induction type float flow transmitter as claimed in claim 1 is characterized in that: an active section also can be designed to the tapering that can adapt with the tapering of float in the inwall of described cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02158991 CN1228611C (en) | 2002-12-27 | 2002-12-27 | Inductive float flow transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02158991 CN1228611C (en) | 2002-12-27 | 2002-12-27 | Inductive float flow transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1512145A true CN1512145A (en) | 2004-07-14 |
| CN1228611C CN1228611C (en) | 2005-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02158991 Expired - Fee Related CN1228611C (en) | 2002-12-27 | 2002-12-27 | Inductive float flow transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1228611C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988842B (en) * | 2009-07-31 | 2012-06-27 | 胜利油田胜利动力机械集团有限公司 | Magnetic coupling float type gas flowrate gauge |
| CN103017838A (en) * | 2012-11-21 | 2013-04-03 | 丹东通博电器(集团)有限公司 | S-shaped tube measurer of float flowmeter and float flowmeter using same |
| CN107101686A (en) * | 2017-06-30 | 2017-08-29 | 荆州市明德科技有限公司 | Thermal production well steam mass flow measurement target-type flow sensor and target type meter |
| CN107843742A (en) * | 2017-11-28 | 2018-03-27 | 佛山科学技术学院 | A kind of chemical liquid delivery pipe flow velocity induction structure |
| CN108020278A (en) * | 2017-12-29 | 2018-05-11 | 邯郸市邯钢集团信达科技有限公司 | It can accurately measure the wide range orifice flowmeter of tiny flow quantity |
-
2002
- 2002-12-27 CN CN 02158991 patent/CN1228611C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988842B (en) * | 2009-07-31 | 2012-06-27 | 胜利油田胜利动力机械集团有限公司 | Magnetic coupling float type gas flowrate gauge |
| CN103017838A (en) * | 2012-11-21 | 2013-04-03 | 丹东通博电器(集团)有限公司 | S-shaped tube measurer of float flowmeter and float flowmeter using same |
| CN107101686A (en) * | 2017-06-30 | 2017-08-29 | 荆州市明德科技有限公司 | Thermal production well steam mass flow measurement target-type flow sensor and target type meter |
| CN107843742A (en) * | 2017-11-28 | 2018-03-27 | 佛山科学技术学院 | A kind of chemical liquid delivery pipe flow velocity induction structure |
| CN108020278A (en) * | 2017-12-29 | 2018-05-11 | 邯郸市邯钢集团信达科技有限公司 | It can accurately measure the wide range orifice flowmeter of tiny flow quantity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1228611C (en) | 2005-11-23 |
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Granted publication date: 20051123 Termination date: 20100127 |