CN202066914U - Industrial capacity coupling type non-contact conductivity online measuring device - Google Patents
Industrial capacity coupling type non-contact conductivity online measuring device Download PDFInfo
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- CN202066914U CN202066914U CN201120146546XU CN201120146546U CN202066914U CN 202066914 U CN202066914 U CN 202066914U CN 201120146546X U CN201120146546X U CN 201120146546XU CN 201120146546 U CN201120146546 U CN 201120146546U CN 202066914 U CN202066914 U CN 202066914U
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- web member
- pipeline
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Abstract
The utility model discloses an industrial capacity coupling type non-contact conductivity online measuring device comprising an alternating-current excitation source, an insulated pipeline, an exciting electrode, a detecting electrode, an inductive module, a metallic shield, a metal insulating board, a metal flange connecting piece, a first wiring terminal, a second wiring terminal, a signal processing module, a data acquisition module and a computer. The device realizes the conductivity online measurement of industrial conventional metal pipelines in capacity coupling type non-contact conductivity measuring technology. Through the use of the metal flange connecting piece, the insulated pipeline of the device can be conveniently connected with the metal pipeline on industrial site. Simultaneously, a measuring pipeline and the electrodes are arranged in the metallic shield shell, and the stability and the capacity of resisting disturbance of the device are improved. The device has the advantages of being high in distinguishability, simple in structure, non-intrusive, and free from influence on fluid in the pipeline, thereby providing helpful reference for solving the non-intrusive online measurement of liquid conductivity in conventional industrial metal pipelines.
Description
Technical field
The utility model relates to electricity and leads detection technique, relates in particular to a kind of industrial capacity coupling non-contact conductance on-line measurement device.
Background technology
Ducted liquid-phase system extensively is present in the process of research and production of departments such as metallurgy, chemical engineering, biological medicine, environmental protection and wastewater treatment; conductivity is one of basic physical properties parameter of liquid; the online detection of conductivity has important effect to other characterisitic parameters of liquid in the analysis conduit, as concentration, component, chemical reaction rate etc.Exactly because a lot of physics of liquid, chemical characteristic difference all can be reflected as the variation of its conductivity, thus in the pipeline on-line measurement of liquid electric conductivity produce and scientific research in have a wide range of applications scope and important Research Significance.
Traditional method for measuring conductance is mainly contact type measurement, the contact conductance measurement directly contacts with liquid owing to electrode, electrode is polarized easily, and easily by liquid contamination, thereby the accuracy that influence is measured, shorten the serviceable life of electrode, and the installing electrodes of will on pipeline, punchinging, make that the use of electrode is very inconvenient.
And the capacity coupling non-contact conductance measuring method is a kind of non-contact conductance measuring method, because electrode does not contact with ducted liquid, has kept the cleanliness of electrode, prolonged the serviceable life of electrode, and electrode structure is simple.Simultaneously, electrode is installed in pipeline outer wall, and the fluid in the pipeline is flowed can not produce interference, has non-invasi.
Yet present capacity coupling non-contact conductance measuring method is mainly used in the analytical chemistry field, and applied environment mostly is laboratory environment, and the pipeline of its sensor mostly is kapillary, and the applied environment of this and industry spot has very big difference.In the process industry field, line size is generally between several millimeters to tens millimeters, and is even bigger, and obvious original capacity coupling non-contact conductance survey sensor is not suitable for using on the conventional pipeline of industry.In addition, because the pipeline of capacity coupling non-contact conductance survey sensor is an isolated pipe, and industrial metallic conduit is generally metallic conduit, and therefore original capacity coupling non-contact conductance survey sensor can't be realized being connected with the simple of Industrial Metal pipeline.The utility model has designed a kind of non-contact conductance on-line measurement device that electricity is led on-line measurement that is applied to carry out on the process industry common metal pipeline at these present situations.The metal flange web member of design has realized that isolated pipe and the simple of metallic conduit are connected.Utilize the inductance module to eliminate the influence of coupling capacitance, the pipeline that has enlarged sensor adapts to size, is complementary with the size of the conventional pipeline of industry.Disturb big characteristics at industry spot simultaneously, sensor pipeline and electrode are installed in the metal shielding, thus the stability and the antijamming capability of raising measurement mechanism.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of industrial capacity coupling non-contact conductance on-line measurement device is provided.
Industrial capacity coupling non-contact conductance on-line measurement device comprises isolated pipe, exciting electrode, detecting electrode, inductance module, metal shielding, metal division board, metal flange web member, first connection terminal, second connection terminal, ac-excited source, signal processing module, data acquisition module, computing machine; The metal shielding two ends are respectively equipped with the metal flange web member, laterally be provided with the metal division board in the metal shielding, vertically be provided with isolated pipe in the metal shielding, the metal flange web member is inserted at the isolated pipe two ends respectively, the isolated pipe outer wall, the both sides of metal division board are respectively equipped with exciting electrode, detecting electrode, exciting electrode links to each other by an end of the first outer connection terminal of inductance module and metal shielding, the other end of first connection terminal links to each other with ac-excited source, detecting electrode links to each other with an end of metal shielding second connection terminal outward, the other end of second connection terminal, signal processing module, data acquisition module, computing machine links to each other in turn, metal shielding, metal division board and metal flange web member be ground connection respectively.
Described metal flange web member comprises inboard web member, outside web member and O RunddichtringO, one end of outside web member is a joint flange, the other end of outside web member has secondary stepped appearance through hole, on first order stepped appearance through hole, be provided with internal thread, inboard web member and outside web member are by being threaded, the O RunddichtringO is enclosed within on the isolated pipe of insertion, by inboard web member and outside web member mutual extrusion, fixes isolated pipe.
The utility model compared with prior art has beneficial effect:
1) use by the metal flange web member has realized the simple connection between the metallic conduit of the isolated pipe of measurement mechanism and industry spot, and is easy for installation;
2) enlarged the line size of non-contact conductivity measuring device, measurement mechanism can be applied in the electricity of measuring in the conventional pipeline in the process industry field and lead;
3) measuring method has non-invasi, effectively avoided electrode to contact with liquid in the pipeline, problems such as electrode polarization that the contact method for measuring conductance exists and galvanic corrosion have been overcome, thereby prolonged the serviceable life of electrode, improved the accuracy of measuring, electrode can not exert an influence to the mobile of pipeline inner fluid simultaneously, does not disturb the flow field of fluid;
4) measuring channel and electrode are installed in shielded metal shell inside, have improved the stability and the antijamming capability of device.
Description of drawings
Fig. 1 is the structural representation of industrial capacity coupling non-contact conductance on-line measurement device;
Fig. 2 is the structural representation of metal flange web member of the present utility model;
Fig. 3 is the equivalent circuit diagram that non-contact conductance of the present utility model detects;
Among the figure: isolated pipe 1, exciting electrode 2, detecting electrode 3, inductance module 4, metal shielding 5, metal division board 6, metal flange web member 7, first connection terminal 8, second connection terminal 9, ac-excited source 10, signal processing module 11, data acquisition module 12, computing machine 13, inboard web member 14, outside web member 15, O RunddichtringO 16.
Embodiment
As shown in Figure 1, industrial capacity coupling non-contact conductance on-line measurement device comprises isolated pipe 1, exciting electrode 2, detecting electrode 3, inductance module 4, metal shielding 5, metal division board 6, metal flange web member 7, first connection terminal 8, second connection terminal 9, ac-excited source 10, signal processing module 11, data acquisition module 12, computing machine 13; Metal shielding 5 two ends are respectively equipped with metal flange web member 7, laterally be provided with metal division board 6 in the metal shielding 5, vertically be provided with isolated pipe 1 in the metal shielding 5, metal flange web member 7 is inserted at isolated pipe 1 two ends respectively, isolated pipe 1 outer wall, the both sides of metal division board 6 are respectively equipped with exciting electrode 2, detecting electrode 3, exciting electrode 2 links to each other by the end of inductance module 4 with metal shielding 5 first connection terminal 8 outward, the other end of first connection terminal 8 links to each other with ac-excited source 10, detecting electrode 3 links to each other with an end of metal shielding 5 second connection terminal 9 outward, the other end of second connection terminal 9, signal processing module 11, data acquisition module 12, computing machine 13 links to each other in turn, metal shielding 5, metal division board 6 and metal flange web member 7 adopt 316L stainless steel and difference ground connection.
The flow process of utilizing these apparatus and method to measure conductance of liquid is: the frequency of ac-excited source 10 output AC voltage signals is a resonance frequency, ac voltage signal is added on the exciting electrode 2 after by inductance module 4, on detecting electrode 3, obtain directly to reflect the current signal of conductance of liquid, after current/voltage-converted, rectification, filtering and direct current amplify, be transferred on the computing machine 13 voltage signal of exporting and demonstration by data acquisition module 12.
As shown in Figure 2, the metal flange web member 7 of industrial capacity coupling non-contact conductance on-line measurement device comprises inboard web member 14, outside web member 15 and O RunddichtringO 16, one end of outside web member 15 is a joint flange, the other end of outside web member 15 has secondary stepped appearance through hole, on first order stepped appearance through hole, be provided with internal thread, inboard web member 14 and outside web member 15 are by being threaded, O RunddichtringO 16 is enclosed within on the isolated pipe 1 of insertion, by inboard web member 14 and outside web member 15 mutual extrusion, fix isolated pipe 1.The joint flange of outside web member 15 and the metallic conduit of industry spot are connected, and realize being connected of isolated pipe and metallic conduit.
As shown in Figure 3, the electricity of industrial capacity coupling non-contact conductance on-line measurement device is led and is detected equivalent electrical circuit and be: an end and the inductance in ac-excited source 10
An end, inductance
The other end and formed first coupling capacitance of conducting liquid in exciting electrode 2 and the isolated pipe 1
An end connect first coupling capacitance
The other end respectively and the equivalent resistance of the conducting liquid between exciting electrode 2 and the detecting electrode 3
An end, exciting electrode 2 and metal flange web member 7 between the equivalent resistance of conducting liquid
An end connect equivalent resistance
Other end ground connection, equivalent resistance
The other end respectively with detecting electrode 3 and isolated pipe 1 in formed second coupling capacitance of conducting liquid
An end, detecting electrode 2 and metal flange web member 7 between the equivalent resistance of conducting liquid
An end connect equivalent resistance
Other end ground connection.
The step of industrial capacity coupling non-contact conductance On-line Measuring Method is as follows:
1) driving voltage in ac-excited source 10 is set
Frequency
Lead the resonance frequency of testing circuit for electricity
, under this pumping signal effect, the capacity coupling non-contact conductance testing circuit is in resonant condition, the equiva lent impedance of circuit
Imaginary part be eliminated, wherein,
Driving voltage for ac-excited source 10
Frequency,
Be the equivalent resistance of the conducting liquid between exciting electrode 1 and the detecting electrode 2,
Be the inductance value of inductance module 4,
Be the formed coupling capacitance of conducting liquid in exciting electrode 1 and the pipeline,
Be the formed coupling capacitance of conducting liquid in detecting electrode 2 and the pipeline,
,
Be the equivalent resistance resistance of the conducting liquid between exciting electrode 1 and the metal flange web member 7,
Be the equivalent resistance resistance of the conducting liquid between detecting electrode 2 and the metal flange web member 7,
Be distance between electrodes and electrode ratio to the distance between the metal flange web member 7,
2) in resonance frequency
Condition under because
, the equiva lent impedance that can obtain under the resonant condition is
3) measure electric electric current of leading in the testing circuit by signal processing module 11
, through relational expression
, promptly obtain the equivalent resistance of conducting liquid
Thereby, the electric conductivity value of acquisition conducting liquid.
Claims (2)
1. an industrial capacity coupling non-contact conductance on-line measurement device is characterized in that comprising isolated pipe (1), exciting electrode (2), detecting electrode (3), inductance module (4), metal shielding (5), metal division board (6), metal flange web member (7), first connection terminal (8), second connection terminal (9), ac-excited source (10), signal processing module (11), data acquisition module (12), computing machine (13); Metal shielding (5) two ends are respectively equipped with metal flange web member (7), laterally be provided with metal division board (6) in the metal shielding (5), vertically be provided with isolated pipe (1) in the metal shielding (5), metal flange web member (7) is inserted at isolated pipe (1) two ends respectively, isolated pipe (1) outer wall, the both sides of metal division board (6) are respectively equipped with exciting electrode (2), detecting electrode (3), exciting electrode (2) links to each other by an end of outer first connection terminal (8) of inductance module (4) and metal shielding (5), the other end of first connection terminal (8) links to each other with ac-excited source (10), detecting electrode (3) links to each other with an end of metal shielding (5) second connection terminal (9) outward, the other end of second connection terminal (9), signal processing module (11), data acquisition module (12), computing machine (13) links to each other in turn, metal shielding (5), metal division board (6) and metal flange web member (7) be ground connection respectively.
2. a kind of industrial capacity coupling non-contact conductance on-line measurement device according to claim 1, it is characterized in that described metal flange web member (7) comprises inboard web member (14), outside web member (15) and O RunddichtringO (16), one end of outside web member (15) is a joint flange, the other end of outside web member (15) has secondary stepped appearance through hole, on first order stepped appearance through hole, be provided with internal thread, inboard web member (14) and outside web member (15) are by being threaded, O RunddichtringO (16) is enclosed within on the isolated pipe (1) of insertion, by inboard web member (14) and outside web member (15) mutual extrusion, fix isolated pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120146546XU CN202066914U (en) | 2011-05-10 | 2011-05-10 | Industrial capacity coupling type non-contact conductivity online measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120146546XU CN202066914U (en) | 2011-05-10 | 2011-05-10 | Industrial capacity coupling type non-contact conductivity online measuring device |
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| CN202066914U true CN202066914U (en) | 2011-12-07 |
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| CN201120146546XU Expired - Lifetime CN202066914U (en) | 2011-05-10 | 2011-05-10 | Industrial capacity coupling type non-contact conductivity online measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269726A (en) * | 2011-05-10 | 2011-12-07 | 浙江大学 | Industrial capacitively coupled contactless conductivity online measurement device and method |
| CN104459333A (en) * | 2014-12-05 | 2015-03-25 | 浙江大学 | Industrial capacitive coupling type double inductance structure non-contacting conductance measuring device and method |
-
2011
- 2011-05-10 CN CN201120146546XU patent/CN202066914U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269726A (en) * | 2011-05-10 | 2011-12-07 | 浙江大学 | Industrial capacitively coupled contactless conductivity online measurement device and method |
| CN102269726B (en) * | 2011-05-10 | 2013-06-05 | 浙江大学 | Industrial capacitively coupled contactless conductivity online measurement device and method |
| CN104459333A (en) * | 2014-12-05 | 2015-03-25 | 浙江大学 | Industrial capacitive coupling type double inductance structure non-contacting conductance measuring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111207 Effective date of abandoning: 20130605 |
|
| RGAV | Abandon patent right to avoid regrant |