CN205844242U - A kind of conductivity sensing electrodes - Google Patents
A kind of conductivity sensing electrodes Download PDFInfo
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- CN205844242U CN205844242U CN201620787331.9U CN201620787331U CN205844242U CN 205844242 U CN205844242 U CN 205844242U CN 201620787331 U CN201620787331 U CN 201620787331U CN 205844242 U CN205844242 U CN 205844242U
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- cylindrical body
- adapter
- electrode
- sensing electrodes
- fixed block
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Abstract
The utility model discloses a kind of conductivity sensing electrodes, described conductivity sensing electrodes includes that shaft section is circular shell, it is positioned in described shell and the adapter coaxial with described shell, electrode body and fixed block, described electrode body is two and fixing with the two ends of described adapter is respectively connected, described fixed block is to lay respectively at two of described shell two ends and fixing with two described electrode bodies be respectively connected, described electrode body includes the first cylindrical body and second cylindrical body of coaxial and fixing connection, described first cylindrical body and the second cylindrical body are provided with duct, described first cylindrical body is fixing with described fixed block to be connected, described second cylindrical body is fixing with described adapter to be connected, the bottom surface of adapter one end of described second cylindrical body is the detection faces for detecting electrical conductivity.The conductivity sensing electrodes accuracy in detection that this utility model provides is high, and volume is little.
Description
Technical field
This utility model relates to chemical analysis instrument technical field, is specifically related to conductivity sensing electrodes.
Background technology
On bio-separation chromatographic system, need the electrical conductivity of on-line checking flowing phase, be used for groping and optimize chromatograph and divide
From condition, owing to chromatographic isolation needs the least delay volume, it is to avoid sample diffusion causes peak to expand, thus has influence on chromatograph
The separating degree separated, avoids gas bubbles left simultaneously under conditions of ensureing little delay volume as far as possible in flow cell, improves inspection
Survey response speed, further, since the conductivity range of flowing phase that bio-separation is used is the widest, from 0.001mS/min to
1000mS/min, it is desirable to ensure that testing result has in a wide range good linear, so reasonably design structure is particularly important.
The Chinese patent literature of Publication No. CN201837607U discloses a kind of liquid conductivity measurement electrode, including two
Individual electrode, two the liquid stream mouths being arranged on, it is communicated with the fluid course of two electrodes between two described electrodes, described
Two liquid stream mouths connected by fluid course, as improvement, between two described electrodes, be filled with insulating barrier, described liquid
Circulation road is opened on insulating barrier.Fluid course, by filling insulator between interior electrode and external electrode, is offered by this patent
On insulator, interelectrode distance can be made minimum and stable, be conducive to making the electricity of accurate low cell constant of conductometric vessel
Pole；Fluid course being offered into long narrow passage, beneficially fluid to be measured and flows through fluid course, the liquid measured can be complete
Complete discharging, also can reduce dead volume during measurement, liquid can keep bigger flow velocity at long narrow passage simultaneously, washes away electrode table
Face, thus reach unpolarized purpose.This utility model structure, measures liquid electric conductivity the most accurate.
Electrode and the flow cell of present online electric conductivity detector are the biggest, have the biggest dead volume, mainly fit
For big flow rate environments, on laboratory scale chromatographic system, owing to the lowest generally 0.1 milliliter of application flow velocity per minute arrives
Tens milliliters per minute, and big flow cell detection dead volume can bring serious peak to expand, and affects separating effect so that chromatograph is divided
Sample after from brings error when just collecting, the biggest flow cell volume under the conditions of little flow velocity owing to easily remaining bubble,
Cause accuracy in detection poor.
Utility model content
The purpose of this utility model is to provide a kind of conductivity sensing electrodes, the electrical conductivity detection that this utility model provides
Electrode detection accuracy is high, and volume is little.
For achieving the above object, this utility model provides a kind of conductivity sensing electrodes, described conductivity sensing electrodes bag
Include shaft section to be circular shell, be positioned in described shell and adapter, electrode body and the fixed block coaxial with described shell,
Described electrode body is two and fixing with the two ends of described adapter is respectively connected, described fixed block for lay respectively at described outside
Two of shell two ends and fixing with two described electrode bodies be respectively connected, described fixed block, adapter and electrode body and institute
Stating the inner space that has been internally formed of shell, described fixed block is connected with described with the inside of electrode body, described electrode body
The inside of device is by the duct fluid communication for flowing through the flowing phase needing detection, described duct and described inner space fluid
Isolation, described electrode body includes the first cylindrical body and second cylindrical body of coaxial and fixing connection, described first cylindricality
Being provided with duct in body and the second cylindrical body, the diameter of described first cylindrical body is straight more than described second cylindrical body
Footpath, described first cylindrical body is fixing with described fixed block to be connected, and described second cylindrical body is fixing with described adapter to be connected,
The bottom surface of adapter one end of described second cylindrical body is the detection faces for detecting electrical conductivity.
Preferably, the side of described second cylindrical body is formed with external screw thread, and described adapter is formed and described outer spiral shell
The female thread that stricture of vagina matches.
Preferably, described first cylindrical body is connected by gasket seal and described fixed block are fixing.
Preferably, described first cylindrical body is provided with temperature electrode installing hole, the diameter of described temperature electrode installing hole
For 4-5 millimeter.
Preferably, a diameter of 1-8 millimeter of described detection faces, a diameter of 0.5-4 millimeter in described duct.
This utility model has the advantage that
Conductivity sensing electrodes simple in construction of the present utility model, dead volume is little, detection range width, detects response speed
Hurry up, the electrical conductivity on-line monitoring of the flowing phase being suitable under little flow rate environments.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of this utility model conductivity sensing electrodes.
Fig. 2 is the structural representation of a kind of embodiment of this utility model electrode body.
Fig. 3 is the structural representation of a kind of embodiment of this utility model adapter.
Fig. 4 is the structural representation of a kind of embodiment of this utility model connector and electrode body.
Fig. 5 is the structural representation of a kind of embodiment of this utility model conductivity sensing electrodes.
Wherein, 1 is shell, and 2 is motor body, and 3 is adapter, and 4 is fixed block, and 5 is duct, and 6 is the first cylindrical body,
7 is the second cylindrical body, and 8 is detection faces, and 9 is external screw thread, and 10 is female thread, and 11 is gasket seal, and 12 install for temperature electrode
Hole.
Detailed description of the invention
Detailed description below is used for illustrating this utility model, but is not limited to scope of the present utility model.
As Figure 1-5, this utility model provides a kind of conductivity sensing electrodes, and described conductivity sensing electrodes includes axle
Cross section is the shell 1 of circle, is positioned in described shell 1 and adapter 3, electrode body 2 and the fixed block coaxial with described shell 1
4, described electrode body 2 is two and fixing with the two ends of described adapter 3 is respectively connected, and described fixed block 4 is for laying respectively at
Two of described shell 1 two ends and fixing with two described electrode bodies 2 be respectively connected, described fixed block 4, adapter 3 and electricity
The inner space that has been internally formed of pole body 2 and described shell 1, described fixed block 4 and the inside of electrode body 2, described electrode
Body 2 is in fluid communication by the duct 5 of the flowing phase for flowing through needs detection with the inside of described adapter 3, described duct 5
With described inner space fluid isolation, described electrode body 2 includes the first cylindrical body 6 and the second post of coaxial and fixing connection
Shape body 7, is provided with duct 5, the diameter of described first cylindrical body 6 in described first cylindrical body 6 and the second cylindrical body 7
More than the diameter of described second cylindrical body 7, described first cylindrical body 6 is fixing with described fixed block 4 to be connected, described second post
Shape body 7 is fixing with described adapter 3 to be connected, and the bottom surface of adapter 3 one end of described second cylindrical body 6 is for being used for detecting electricity
The detection faces 8 of conductance.
In use, need the flowing of detection to flow to the other end from the one end in duct 5, and contact with detection faces 8, make
The electrical conductivity of detection faces 8 detection flowing phase, conductivity sensing electrodes simple in construction of the present utility model, dead volume is little, detects model
Enclose width, detect fast response time, the electrical conductivity on-line monitoring of the flowing phase being suitable under little flow rate environments.
As Figure 2-3, in order to by adapter 3 and the fixing connection of electrode body 2, the side of described second cylindrical body 7
Could be formed with external screw thread 9, described adapter 3 could be formed with the female thread 10 matched with described external screw thread 9, external screw thread 9
Can rotate in female thread 10.Adapter can use PEEK or ETFE materials processing to form, the duct in the middle of adapter
Diameter is consistent with the diameter in electrode duct, it is to avoid the Tibetan of bubble is stayed, the orifice throat length in the middle of adapter can be 1mm～10mm it
Between.
As shown in Figure 4, two bulk electrode are connected together by screw thread with adapter, avoid leakage after tightening.It addition,
As it is shown in figure 5, in order to avoid leakage in the environment of having pressure at liquid, described first cylindrical body 6 can pass through gasket seal
11 fixing with described fixed block 4 are connected, and described gasket seal 11 is two, can be PTFE material.
As in figure 2 it is shown, electrical conductivity is temperature dependent, in order to more accurately measure electrical conductivity, described first cylindrical body 6 is arranged
Having temperature electrode installing hole 12, a diameter of 4-5 millimeter of described temperature electrode installing hole 12, temperature electrode installing hole 12 can be used
In installing the temperature sensor that TO-92 or TO-93 encapsulates, bonding by insulative glue between temperature sensor with electrode body, use
In the temperature of detecting electrode, the temperature of indirect detection flowing phase, the temperature-compensating when electrical conductivity detects, improve detection accurately
Degree.
A kind of detailed description of the invention, electrode body can use Titanium or 316L stainless steel material to process, described
A diameter of 1-8 millimeter of detection faces 8, a diameter of 0.5-4 millimeter in described duct 5.
Although, the most with general explanation and specific embodiment, this utility model is made detailed description, but
On the basis of this utility model, can make some modifications or improvements it, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements on the basis of without departing from this utility model spirit, belong to this utility model and want
Seek the scope of protection.
Claims (5)
1. a conductivity sensing electrodes, it is characterised in that described conductivity sensing electrodes includes that shaft section is circular shell
(1), it is positioned in described shell (1) and the adapter (3) coaxial with described shell (1), electrode body (2) and fixed block (4), institute
Stating electrode body (2) to be two and fixing with the two ends of described adapter (3) is respectively connected, described fixed block (4) is for distinguishing position
In two of described shell (1) two ends and fixing with two described electrode bodies (2) is respectively connected, described fixed block (4), connection
Device (3) and electrode body (2) have been internally formed inner space, described fixed block (4) and electrode body with described shell (1)
(2) inside, described electrode body (2) and described adapter (3) inside by for flowing through the flowing phase that needs detection
Duct (5) is in fluid communication, described duct (5) and described inner space fluid isolation, and described electrode body (2) includes coaxial and solid
Fixed the first cylindrical body (6) connected and the second cylindrical body (7), described first cylindrical body (6) and the second cylindrical body (7)
In be provided with duct (5), the diameter of described first cylindrical body (6) more than the diameter of described second cylindrical body (7), described the
One cylindrical body (6) is fixing with described fixed block (4) to be connected, and described second cylindrical body (7) is fixing with described adapter (3) even
Connecing, the bottom surface of adapter (3) one end of described second cylindrical body (6) is for detecting the detection faces of electrical conductivity (8).
Conductivity sensing electrodes the most according to claim 1, it is characterised in that the side of described second cylindrical body (7)
Being formed with external screw thread (9), described adapter (3) is formed with the female thread (10) matched with described external screw thread (9).
Conductivity sensing electrodes the most according to claim 1, it is characterised in that described first cylindrical body (6) is by close
Gasket (11) is fixing with described fixed block (4) to be connected.
Conductivity sensing electrodes the most according to claim 1, it is characterised in that described first cylindrical body (6) is provided with
Temperature electrode installing hole (12), a diameter of 4-5 millimeter of described temperature electrode installing hole (12).
Conductivity sensing electrodes the most according to claim 1, it is characterised in that a diameter of 1-8 milli of described detection faces (8)
Rice, a diameter of 0.5-4 millimeter of described duct (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620787331.9U CN205844242U (en) | 2016-07-25 | 2016-07-25 | A kind of conductivity sensing electrodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620787331.9U CN205844242U (en) | 2016-07-25 | 2016-07-25 | A kind of conductivity sensing electrodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205844242U true CN205844242U (en) | 2016-12-28 |
Family
ID=57625789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620787331.9U Active CN205844242U (en) | 2016-07-25 | 2016-07-25 | A kind of conductivity sensing electrodes |
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| CN (1) | CN205844242U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764913A (en) * | 2017-09-30 | 2018-03-06 | 南京大学 | A kind of nucleic acid-protein conductance combination detecting system and its detection method |
| CN111157587A (en) * | 2019-12-30 | 2020-05-15 | 中国人民解放军军事科学院国防科技创新研究院 | Conductivity sensor for microgravity environment |
-
2016
- 2016-07-25 CN CN201620787331.9U patent/CN205844242U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764913A (en) * | 2017-09-30 | 2018-03-06 | 南京大学 | A kind of nucleic acid-protein conductance combination detecting system and its detection method |
| CN111157587A (en) * | 2019-12-30 | 2020-05-15 | 中国人民解放军军事科学院国防科技创新研究院 | Conductivity sensor for microgravity environment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |