CN102759556A - Explosion-proof-type zirconia probe - Google Patents
Explosion-proof-type zirconia probe Download PDFInfo
- Publication number
- CN102759556A CN102759556A CN201210230156XA CN201210230156A CN102759556A CN 102759556 A CN102759556 A CN 102759556A CN 201210230156X A CN201210230156X A CN 201210230156XA CN 201210230156 A CN201210230156 A CN 201210230156A CN 102759556 A CN102759556 A CN 102759556A
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- Prior art keywords
- explosion
- type zirconia
- proof
- gas
- limit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000000523 sample Substances 0.000 title claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 230000007704 transition Effects 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims description 66
- 238000003466 welding Methods 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000003325 tomography Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000027734 detection of oxygen Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The invention provides an explosion-proof-type zirconia probe which is mainly structurally composed of eight parts: a limiting-current-type zirconia sensor, a gas interchanger, a heat tracing device, a filtering device, a transition lead, a protective casing with a flange, a scale gas connecting element and an explosion-proof terminal box, wherein the gas interchanger is internally provided with the limiting-current-type zirconia sensor, and is externally provided with the heat tracing device; outgoing lines of the limiting-current-type zirconia sensor and the heat tracing device are connected with one end of the transition lead, and the other end of the transition lead is connected with the explosion-proof terminal box; the limiting-current-type zirconia sensor, the gas interchanger and the heat tracing device are all arranged in the filtering device; the filtering device is connected with one end of the protective casing with a flange; and the scale gas connecting element is used for being connected with the protective casing with a flange and the explosion-proof terminal box and is communicated with the limiting-current-type zirconia sensor through the scale gas connecting element. Because a reference gas is not required to be introduced in detection, compared with the traditional explosion-proof-type zirconia probe, the explosion-proof-type zirconia probe is safer, and can realize online calibration at the same time.
Description
Technical field
The present invention relates to a kind of explosion-proof type zirconia probe.
Background technology
Traditional explosion-proof type zirconia probe adopts the electric potential type zirconia sensor, and its application principle is at a certain temperature, when sensor both sides existence during without the oxygen of dividing potential drop, and sensor both sides voltage
In the formula: the R-gas law constant; The T-thermodynamic temperature; The F-Faraday constant;
Oxygen partial pressure in the combination gas; P
AOxygen partial pressure in the-reference gas.
When temperature one timing,, can record the oxygen concentration of tested gas because the reference gas oxygen concentration is known.Generally select for use air to do reference gas, its value is 20.6%.Measuring process must guarantee that reference gas exists constantly; And in order to reach requirement of explosion proof; Cause explosion-proof zirconia probe zirconia sensor reference gas side to non-dangerous local air through laying pipeline; This method not only wastes time and energy when first installing is equipped with system, need to install lay the air guide pipeline, and air guide pipeline and other pipe fitting accessory strictnesses on application facet that assurance is laid reaches requirement of explosion proof; And make troubles for later maintenance and maintenance process equally, make installation process and maintenance job complicated.
Summary of the invention
For addressing the above problem, need not the explosion-proof type zirconia probe of reference gas when the invention provides a kind of the detection.
First technical scheme of the present invention is a kind of explosion-proof type zirconia probe, it is characterized in that comprising: limit-current type zirconia sensor, air interchanger, companion's thermic devices, filtration unit, transition lead, flanged protecting pipe, gas web member, explosion-proof terminal board; Wherein, Said limit-current type zirconia sensor is arranged in the said air interchanger; Be provided with companion's thermic devices in the said air interchanger outside; The limit-current type zirconia sensor is connected with an end of transition lead with the extension line of companion's thermic devices, and the interior binding post of the other end of transition lead and explosion-proof terminal board is connected, and limit-current type zirconia sensor, air interchanger, companion's thermic devices, all places filtration unit; Filtration unit is connected an end and connects with flanged sheath, the gas web member is used for connecting band flange sheath, explosion-proof terminal board and passes through the gas pipe being communicated with the limit-current type zirconia sensor.
Second technical scheme of the present invention is on the basis of first technical scheme, to realize; It is characterized in that said air interchanger is the cylinder type filter mantle of a hollow, its top is provided with an air intake opening; Be connected with the gas pipe; The lower end is provided with mounting hole, is used for fixing to connect the limit-current type zirconia sensor, and the filter mantle middle inside is provided with a circle metal baffle; The formed space of the upper and lower end face of metal baffle upper/lower terminal and filter mantle is as the gas stream port of air interchanger, and air intake opening area Sa and gas communication open area Sb satisfy: Sa＞Sb * filtration order number * unit filters order and counts area.
The 3rd technical scheme of the present invention is on the basis of second technical scheme, to realize, it is characterized in that, described gas Guan Yiduan inserts air intake opening and makes gas pipe end face be lower than the metal baffle upper surface, and the gas pipe other end links to each other with the gas web member.
The 4th technical scheme of the present invention is on the basis of the 3rd technical scheme, to realize, it is characterized in that, said explosion-proof type terminal board is provided with two chambers, and two chamber interval tomographies are provided with a plurality of through holes.Chamber A inside is provided with connection terminal, and the binding post of connection terminal inserts among the chamber B through through hole.Slit, through hole in the middle of two chambers uses high-temperature insulating glue to fill, and makes two chamber independent closed, has only circuit to communicate; No gas circuit communicates; A plurality of binding posts that chamber B is inner, the transition lead of be used to connect the limit-current type zirconia sensor, accompanying thermic devices, its connected mode is welding.
The 5th technical scheme of the present invention is on the basis of the 4th technical scheme, to realize; It is characterized in that; The extension line of described limit-current type zirconia sensor, companion's thermic devices and the connected mode of transition lead are the argon arc welding welding; The welding position encapsulates with ceramic pillar, and fixes with high-temperature insulating glue.
The 6th technical scheme of the present invention is on the basis of first to five technical scheme, to realize, it is characterized in that, the chamber A and the chamber B of said explosion-proof type terminal board are separate airtight, and each joint face all reaches required explosive-proof grade requirement.
Description of drawings
Fig. 1 is the overall schematic of explosion-proof type zirconia probe of the present invention;
Fig. 2 is the structural representation of sensor and circumferential component;
Fig. 3 is the structural representation of air interchanger;
Fig. 4 is the structural representation of explosion-proof type terminal board.
Embodiment
The limit-current type zirconia sensor is adopted in the detection of oxygen concentration in the present invention.The application principle of limit-current type zirconia sensor is at a certain temperature; When the impressed voltage of sensor both sides; Electric current changes with the variation of voltage; When voltage is raised to certain value, this moment, electric current was a saturation current, and its value is:
In the formula: the R-gas law constant; The T-thermodynamic temperature; The F-Faraday constant; The coefficient of diffusion of oxygen molecule in
-mixed gas; The length of l-diffusion hole; The area of S-diffusion hole; Oxygen partial pressure in
-combination gas; The P-total head.This moment, size of current was only relevant with oxygen concentration on every side, therefore can under the situation that does not have reference gas, record the oxygen concentration of tested gas.Therefore the present invention, compares with traditional explosion-proof type zirconia probe owing to adopted the limit-current type zirconia sensor, has omitted reference gas during detection, and structure is simpler, and explosion-proof performance is better.
Below in conjunction with accompanying drawing, the concrete structure of zirconia probe of the present invention is described.
Fig. 1 is the overall schematic of explosion-proof type zirconia probe of the present invention.As shown in Figure 1, explosion-proof type zirconia probe of the present invention mainly is made up of filtration unit 1, flanged sheath 2, gas web member 3, explosion-proof terminal board 4 and the limit-current type zirconia sensor and the circumferential component that are arranged in the filtration unit 1.
Flanged sheath 2 is welded by a stainless-steel pipe and a ring flange, and the one of which end is connected with filtration unit 1, and the other end is connected with gas web member 3, for parts such as the transition lead of inside and gas pipe provide protection.
One end of gas web member 3 is connected with flanged sheath 2, and the other end is connected with explosion-proof terminal board 4, and gas web member 3 is connected with gas pipe in the flanged sheath 2.
Fig. 2 is the structural representation of sensor and circumferential component.As shown in Figure 2; The limit-current type zirconia sensor is arranged on the inside of filtration unit 1; Be respectively equipped with air interchanger 13 and companion's thermic devices 14 in the outside of limit-current type zirconia sensor 12; The end of gas pipe 15 is bent into the U font, and it carries out a mouthful 15a and faces limit-current type zirconia sensor 12.Companion's thermic devices 14 is fixed on the outside of air interchanger 13, is shaped as the screw type in certain slit.
The concrete structure of air interchanger 13 is as shown in Figure 3; Be made up of filter mantle 13a and metal baffle 13b, filter mantle 13a is the filter mantle of a hollow circuit cylinder build, and its top is provided with an air intake opening 13c; Be connected with gas pipe 15 through air intake opening 13c, connected mode is welding here.On the filtrator flange sheet 13d of filter mantle 13a lower end, be provided with mounting hole 13e; Be used for fixing and connect limit-current type zirconia sensor 12; Its connected mode is for being threaded; Filter mantle 13a middle inside is provided with a circle metal baffle 13b; The space of metal baffle 13b upper/lower terminal and the formed unequal-area of the upper and lower end face of filter mantle 13a is as the gas stream port of air interchanger; Formed space, top is gas stream port 13f, and formed space, bottom is gas stream port 13g, and air intake opening area Sa is greater than gas outlet area Sb; That is,
* filter order number * unit area filtration order to count area (gas stream port 13g is regarded as the gas outlet when gas).
On-line proving up-to-date style gas enters into air interchanger 13 through gas web member 3 and gas pipe 15 from the air intake opening 13c of air interchanger 13; Gradually original measurement gas in the air interchanger 13 or other gas are squeezed air interchanger 13 through gas stream port 13g; Make limit-current type zirconia sensor 12 surrounding spaces be full of by demarcation appearance gas fully, thereby realize the purpose of accurate on-line proving.Demarcate appearance gas and can adopt air.
Companion's thermic devices 14 has heating and temp sensing function, can guarantee that the temperature around the limit-current type zirconia sensor 12 is stabilized in certain certain value constantly, forms a stable temperature field, is not disturbed by the temperature variation of test environment.Apertured structure can make tested gas flow circulation again between its spiral.
The sensor extension line 12a of limit-current type zirconia sensor 12 and companion's thermic devices 14 are connected with binding post in the explosion-proof type terminal board 4 through the transition lead.
Fig. 4 is the structural representation of explosion-proof type terminal board.As shown in Figure 4, be provided with two chambers in the explosion-proof type terminal board 4, chamber B is connected with gas web member 3.Interval tomography between chamber A and chamber B is provided with a plurality of through hole 4a.Be provided with terminal 4b in chamber A inside, the binding post 4c of this terminal 4b inserts among the chamber B through through hole 4a.Place, slit between through hole 4a and binding post 4c uses high-temperature insulating glue to fill, and makes two chamber independent closed, has only circuit to communicate, and does not communicate and there is gas circuit.Each joint face of explosion-proof type terminal board 4, through wires hole all reach required explosive-proof grade requirement, i.e. chamber A, chamber B, test environment, installation environment independent closed mutually.
The connected mode of transition lead and sensor extension line 12a is the argon arc welding welding, and the welding position encapsulates with ceramic pillar, and fixes with high-temperature insulating glue.The connected mode of transition lead and binding post 4a is the soldering welding.Limit-current type zirconia sensor 12 is provided with five extension lines, is connected with three transition leads.Wherein two is that diameter is that the stainless steel steel wire overcoat diameter of 2mm is the porcelain tube of 4mm, and another transition lead is provided with three leads, and being fixed in diameter is in the stainless-steel tube of 0.5mm, to isolate with insulation filler for the 5mm wall thickness.Companion's thermic devices 14 need not the transition lead, and its extension line places diameter for the 5mm wall thickness is to isolate in the stainless-steel tube of 0.5mm and with insulation filler, directly leads to the binding post 4a of explosion-proof terminal board 4.
More than the concrete structure of explosion-proof type zirconia probe of the present invention is illustrated; Owing to adopt the limit-current type zirconia sensor; Therefore, in explosion-proof design, can save this design of reference gas being drawn the explosive area, need not loaded down with trivial details reference gas pipeline laying work; Simplify erecting equipment process and Maintenance and Repair work greatly, improved work efficiency.
The above is merely preferred embodiment of the present invention, in order to restriction the present invention, within spirit of the present invention and principle, any modification of being done, is not equal to replacement, improvement etc., all is included within protection scope of the present invention.
Claims (6)
1. an explosion-proof type zirconia probe is characterized in that comprising: limit-current type zirconia sensor, air interchanger, companion's thermic devices, filtration unit, transition lead, flanged protecting pipe, gas web member, explosion-proof terminal board; Wherein, Said limit-current type zirconia sensor is arranged in the said air interchanger; Be provided with companion's thermic devices in the said air interchanger outside; The limit-current type zirconia sensor is connected with an end of transition lead with the extension line of companion's thermic devices, and the interior binding post of the other end of transition lead and explosion-proof terminal board is connected, and limit-current type zirconia sensor, air interchanger, companion's thermic devices, all places filtration unit; Filtration unit is connected an end and connects with flanged sheath, the gas web member is used for connecting band flange sheath, explosion-proof terminal board and passes through the gas pipe being communicated with the limit-current type zirconia sensor.
2. explosion-proof type zirconia probe according to claim 1; It is characterized in that said air interchanger is the cylinder type filter mantle of a hollow, its top is provided with an air intake opening; Be connected with the gas pipe; The lower end is provided with mounting hole, is used for fixing to connect the limit-current type zirconia sensor, and the filter mantle middle inside is provided with a circle metal baffle; The formed space of the upper and lower end face of metal baffle upper/lower terminal and filter mantle is as the gas stream port of air interchanger, and air intake opening area Sa and gas communication open area Sb satisfy: Sa＞Sb * filtration order number * unit filters order and counts area.
3. explosion-proof type zirconia probe according to claim 2 is characterized in that, described gas Guan Yiduan inserts air intake opening and makes gas pipe end face be lower than the metal baffle upper surface, and the gas pipe other end links to each other with the gas web member.
4. explosion-proof type zirconia probe according to claim 3 is characterized in that, said explosion-proof type terminal board is provided with two chambers, and two chamber interval tomographies are provided with a plurality of through holes.Chamber A inside is provided with connection terminal, and the binding post of connection terminal inserts among the chamber B through through hole.Slit, through hole in the middle of two chambers uses high-temperature insulating glue to fill, and makes two chamber independent closed, has only circuit to communicate; No gas circuit communicates; A plurality of binding posts that chamber B is inner, the transition lead of be used to connect the limit-current type zirconia sensor, accompanying thermic devices, its connected mode is welding.
5. explosion-proof type zirconia probe according to claim 4; It is characterized in that; The extension line of described limit-current type zirconia sensor, companion's thermic devices and the connected mode of transition lead are the argon arc welding welding, and the welding position encapsulates with ceramic pillar, and fixes with high-temperature insulating glue.
6. according to each described explosion-proof type zirconia probe in the claim 1 to 5, it is characterized in that the chamber A and the chamber B of said explosion-proof type terminal board are separate airtight, each joint face all reaches required explosive-proof grade requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210230156.XA CN102759556B (en) | 2012-07-04 | 2012-07-04 | Explosion-proof-type zirconia probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210230156.XA CN102759556B (en) | 2012-07-04 | 2012-07-04 | Explosion-proof-type zirconia probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102759556A true CN102759556A (en) | 2012-10-31 |
| CN102759556B CN102759556B (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210230156.XA Expired - Fee Related CN102759556B (en) | 2012-07-04 | 2012-07-04 | Explosion-proof-type zirconia probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102759556B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261459A (en) * | 2019-06-17 | 2019-09-20 | 北京科技大学 | A kind of device for controlling extremely low oxygen content in atmosphere and measuring its partial pressure of oxygen |
| CN110308022A (en) * | 2019-08-02 | 2019-10-08 | 中国原子能科学研究院 | Oxygen analyzer water conservancy diversion probe assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430192A (en) * | 1981-03-06 | 1984-02-07 | Yokogawa Hokushin Electric Corporation | Oxygen gas analyzer using solid electrolyte |
| US6120664A (en) * | 1998-01-16 | 2000-09-19 | Patel; Nitin J. | Oxygen analyzer |
| CN2685875Y (en) * | 2003-07-17 | 2005-03-16 | 刘春宾 | Integral Zirconia smoke oxygen analyzer |
| CN201247220Y (en) * | 2008-05-08 | 2009-05-27 | 南化集团研究院 | Temperature compensation type analyzer for oxygen quantity of zircite |
| CN203025150U (en) * | 2012-07-04 | 2013-06-26 | 北京首仪华强电子设备有限公司 | Explosion-proof zirconium oxide probe |
-
2012
- 2012-07-04 CN CN201210230156.XA patent/CN102759556B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430192A (en) * | 1981-03-06 | 1984-02-07 | Yokogawa Hokushin Electric Corporation | Oxygen gas analyzer using solid electrolyte |
| US6120664A (en) * | 1998-01-16 | 2000-09-19 | Patel; Nitin J. | Oxygen analyzer |
| CN2685875Y (en) * | 2003-07-17 | 2005-03-16 | 刘春宾 | Integral Zirconia smoke oxygen analyzer |
| CN201247220Y (en) * | 2008-05-08 | 2009-05-27 | 南化集团研究院 | Temperature compensation type analyzer for oxygen quantity of zircite |
| CN203025150U (en) * | 2012-07-04 | 2013-06-26 | 北京首仪华强电子设备有限公司 | Explosion-proof zirconium oxide probe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261459A (en) * | 2019-06-17 | 2019-09-20 | 北京科技大学 | A kind of device for controlling extremely low oxygen content in atmosphere and measuring its partial pressure of oxygen |
| CN110308022A (en) * | 2019-08-02 | 2019-10-08 | 中国原子能科学研究院 | Oxygen analyzer water conservancy diversion probe assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102759556B (en) | 2014-05-28 |
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Granted publication date: 20140528 |