CN105424888A - Testing device capable of being used for gas sensor calibration - Google Patents
Testing device capable of being used for gas sensor calibration Download PDFInfo
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- CN105424888A CN105424888A CN201510915708.4A CN201510915708A CN105424888A CN 105424888 A CN105424888 A CN 105424888A CN 201510915708 A CN201510915708 A CN 201510915708A CN 105424888 A CN105424888 A CN 105424888A
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- gas sensor
- main cavity
- upper cover
- lower capping
- ring seal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
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Abstract
The invention discloses a testing device capable of being used for gas sensor calibration. The testing device comprises a main cavity, an upper sealing cover and a lower sealing cover. The upper sealing cover and the lower sealing cover are in sealed fit with the two ends of the main cavity through sealing rings and bolts, the upper sealing cover is provided with a gas sensor, the lower sealing cover is provided with a lifting guide rail, the lifting guide rail is provided with a displacement sensor, and a protective cover is fixed on the lifting guide rail. After the lifting guide rail rises, the protective cover together with the upper sealing cover can form a sealed space for sealing the gas sensor. A first air inlet pipe and a second air inlet pipe are arranged on the upper sealing cover located on the outer side of the sealed space. The first air inlet pipe and the second air inlet pipe are provided with automatic valves and electronic flowmeters. A pressure sensor is arranged in the main cavity. The sections of the sealing rings comprise inclined planes and cambered surfaces, and the inclined planes can form a line sealing structure together with a first boss on the main cavity. After the structure is adopted, the sealing performance is good, poor sealing can be found in time, and the quick responsiveness of the gas sensor can be detected and judged.
Description
Technical field
The present invention relates to a kind of servicing unit, particularly a kind of proving installation that can be used for gas sensor calibration when gas sensor is produced and uses.
Background technology
What carry out measuring general to material concentration with sensor is incidence relation between sensor response and test substance concentration.And the zero point of sensor and sensitivity are in use inevitably drifted about.In order to obtain measured value more accurately, before generally all requiring measurement, sensor is demarcated.
Demarcate and need to measure sensor with the standard substance of concentration known, for liquid, solid matter, the acquisition of standard substance concentration is relatively easy, and generally weighed by analytical balance in laboratory, volumetric flask constant volume just can be accomplished.
And Demarcate Gas, be substantially the value that produces using a kind of high precision apparatus as the ruler of tolerance, be input in sensor to be calibrated, obtain the output quantity of sensor, then by mathematical method, obtain the corresponding relation between sensor constrained input.The demarcation of gas sensor, sensor, as input value, is put into the airtight container being filled with calibrating gas and is demarcated it by the known calibrating gas of normal working concentration.
Therefore, the sealing of container seems and is even more important.
At present, in existing gas sensor calibration instrument, the normal bonding jelly that adopts pastes instrument main cavity and remaining part, and bonding jelly has certain influence to gas concentration, and sealing effectiveness is bad, and this makes the demarcation of light concentration gas there is larger difficulty.In addition, existing calibrating instrument cannot reclaim gas mostly, and the marked gas be discharged in air can pollute air, even impacts demarcation the healthy of personnel.
So, for the shortcoming of existing calibrating instrument, be necessary to develop a kind of new gas sensor calibration container, while promoting instrument sealing, accomplish the protection to environment and staff.
Application number disclosed in Dec 31 in 2014 is No. 201420505880.3 Chinese invention patents, and the name of its innovation and creation is called " gas sensor calibration container ", and it comprises main cavity, left side cover plate, right side cover plate, and two cover plates are positioned at the two ends of main cavity; Left side cover plate is fixed with threeway; One end of threeway is air intake opening, and air intake opening is provided with air intake opening non-return valve; One end is gas outlet, left side cover plate offers three through holes, and gas outlet is communicated with main cavity by three through holes; One end is connected with densitometer; Right side cover plate is fixed with insulating disc and two-way; Insulating disc runs through multiple binding post, one end of binding post is positioned at main cavity inside, and one end is positioned at insulating disc outside; Right side cover plate offers through hole, and one end of this two-way is communicated with main cavity by through hole, and the other end is connected with aspiration pump, two-way is provided with gas outlet non-return valve; Aspiration pump is communicated with returnable bottle.
Although above-mentioned patented claim avoids the use of bonding jelly, and can to waste gas recovery.But with the sealing of main cavity while of needs left side cover plate, right side cover plate, aperture area is large, and sealing effectiveness is poor.In addition, commercially available O-ring seal elasticity is little, and anti-wear performance is poor, uses after a period of time, easily wearing and tearing or aging, when wearing and tearing or aging after, not easily realize, easily cause that to demarcate seal of vessel performance poor, easily leak gas, be not suitable for the demarcation of light concentration gas and toxic gas.
In addition, above-mentioned calibrating instrument, function singleness, only can carry out the demarcation of gas sensor, can not carry out detecting to the fast-response of gas sensor and judge.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, and a kind of proving installation that can be used for gas sensor calibration is provided, this can be used for the proving installation good seal performance of gas sensor calibration, and energy Timeliness coverage poor sealing, can carry out detecting to the fast-response of gas sensor and judge simultaneously.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of proving installation that can be used for gas sensor calibration, comprise the main cavity of upper and lower both ends open, upper cover and lower capping, the end face of two ends up and down of main cavity is provided with the first boss, the side that upper cover and lower capping match with main cavity is provided with groove, is placed with O-ring seal in this groove; Upper cover and lower capping are all sealed and matched by the two ends of O-ring seal and bolt and main cavity; The bottom centre of upper cover is provided with the gas sensor be connected with computing machine, the top center of lower capping is provided with riser guide, riser guide is provided with the displacement transducer be connected with computing machine, the top of riser guide is fixed with open-topped protective cover; After riser guide rises, protective cover can with upper cover bottom form one gas sensor be enclosed in interior confined space; Be positioned on the upper cover outside seal cavity, be also provided with the first draft tube and the second draft tube, the first draft tube with the second draft tube is provided with the autovalve and electronic flow-meter that are connected with computing machine; Lower capping is provided with outlet pipe; The pressure transducer be connected with computing machine is provided with in main cavity; The cross section of described O-ring seal comprises the inclined-plane being arranged at top outer and the cambered surface being arranged at bottom, and described inclined-plane can form linear sealing structure with the first boss on main cavity.
The side that described upper cover and lower capping match with main cavity is all also provided with the second boss, and the cross section of described O-ring seal also comprises the flange being arranged at inside top, and this flange can be formed with the second boss on upper cover or lower capping and be sealed and matched.
Described gas sensor, displacement transducer and pressure transducer all be positioned at the computing machine infrared radio demarcated outside container and be connected.
The bottom of described lower capping is provided with the some supporting legs with roller.
The surface of described O-ring seal is coated with silica gel investment precoat.
After the present invention adopts said structure, there is following beneficial effect:
1. gas sensor can be sealed in the less seal cavity of area by above-mentioned protective cover; the gas needing to carry out response detection can be first filled with outward at this little seal cavity; then; riser guide is declined rapidly; in gas gas sensor being exposed to instantaneously need to carry out response detection; thus while carrying out gas sensor calibration, demarcation and the detection of gas sensor response can also be carried out.In addition, displacement transducer can control the lifting of riser guide automatically, controls more accurate.Further, the setting of the first draft tube, the second draft tube, autovalve and electronic flow-meter, by the control to throughput and gas concentration in the first draft tube or the second draft tube, the gas in main cavity is made to present different concentration, the response of gas sensor when gas with various concentration can be detected, also can carry out corrosive detection.
2. inclined design in above-mentioned O-ring seal, can make the first boss on O-ring seal and main cavity form linear sealing structure, and inclined-plane pressurized can effectively prevent gas from entering main cavity from the position of O-ring seal pressurized, and sealing effectiveness is reliable; Wherein cambered surface design, effectively can solve main cavity and upper cover or lower envelope cover bolt when being fixed and clamped, O-ring seal is because of the uneven generation deformation that is stressed, and the problem that the slight gap brought causes main cavity to leak gas; Effectively improve sealing effectiveness; In addition, flange designs, easy to assembly, ensures in assembling process, there will not be upset, distortion, ensures pressure surface planarization.In addition, the setting of silica gel investment precoat, makes O-ring seal more wear-resisting.
3. the setting of above-mentioned pressure transducer, by detecting the change of pressure in main cavity, thus monitors the sealing property of demarcation container and gives warning in advance.
4. the setting of above-mentioned returnable bottle, can reclaim waste gas, accomplishes the protection to environment and staff simultaneously.
5. above-mentioned pressure transducer and gas sensor are all connected with computing machine infrared radio, avoid the leakage problem that threading causes, and further ensure the sealing property of demarcating container.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation that can be used for the proving installation of gas sensor calibration of the present invention;
Fig. 2 shows the schematic cross-section of O-ring seal in Fig. 1;
Fig. 3 shows the assembling schematic diagram of O-ring seal and lower capping.
Wherein have:
1. main cavity; 11. first boss;
2. upper cover;
21. first draft tube; 211. autovalve; 212. electronic flow-meter;
22. second draft tube;
3. descend capping;
31. riser guides; 311. displacement transducer;
32. outlet pipes; 33. second boss; 34. grooves;
4. supporting leg;
5. protective cover;
6. gas sensor;
7. pressure transducer;
8. air feed bottle;
9. O-ring seal; 91. inclined-planes; 92. cambered surfaces; 93. flange;
10. returnable bottle.
Embodiment
Below in conjunction with accompanying drawing and concrete better embodiment, the present invention is further detailed explanation.
As shown in Figure 1, a kind of proving installation that can be used for gas sensor calibration, comprises the main cavity 1 of upper and lower both ends open, upper cover 2 and lower capping 3.
As shown in Figure 3, the end face of two ends up and down of main cavity is provided with the first boss, the side that upper cover and lower capping match with main cavity is provided with groove, is placed with O-ring seal in this groove; Upper cover and lower capping are all sealed and matched by the two ends of O-ring seal and bolt and main cavity.
The bottom centre of upper cover is provided with the gas sensor be connected with computing machine.
The top center of lower capping is provided with riser guide, riser guide is provided with the displacement transducer be connected with computing machine, and the top of riser guide is fixed with open-topped protective cover.
After riser guide rises, protective cover can with upper cover bottom form one gas sensor be enclosed in interior confined space.
Be positioned on the upper cover outside seal cavity, be also provided with the first draft tube and the second draft tube, the first draft tube with the second draft tube is provided with the autovalve and electronic flow-meter that are connected with computing machine.
The setting of the first draft tube, the second draft tube, autovalve and electronic flow-meter, can by the control to throughput and gas concentration in the first draft tube or the second draft tube, the gas in main cavity is made to present different concentration, the response of gas sensor when gas with various concentration can be detected, also can carry out corrosive detection.
During practical operation, the gas and vapor permeation that need wait two kinds of variable concentrations in main cavity evenly after, then riser guide is declined rapidly, in gas gas sensor being exposed to instantaneously need to carry out response detection, carries out demarcation and the detection of gas sensor response.
Lower capping is provided with outlet pipe; The pressure transducer be connected with computing machine is provided with in main cavity.
As shown in Figure 2, the cross section of O-ring seal comprises the inclined-plane being arranged at top outer and the cambered surface being arranged at bottom, and described inclined-plane can form linear sealing structure with the first boss on main cavity.
As shown in Figure 3, the side that upper cover and lower capping match with main cavity is all also provided with the second boss, and the cross section of described O-ring seal also comprises the flange being arranged at inside top, and this flange can be formed with the second boss on upper cover or lower capping and be sealed and matched.
Further, gas sensor, displacement transducer and pressure transducer all be positioned at the computing machine infrared radio demarcated outside container and be connected.
Further, the bottom of lower capping is provided with the some supporting legs with roller.
Further, the surface of O-ring seal is coated with silica gel investment precoat.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple equivalents to technical scheme of the present invention, these equivalents all belong to protection scope of the present invention.
Claims (5)
1. one kind can be used for the proving installation of gas sensor calibration, it is characterized in that: comprise the main cavity of upper and lower both ends open, upper cover and lower capping, the end face of two ends up and down of main cavity is provided with the first boss, the side that upper cover and lower capping match with main cavity is provided with groove, is placed with O-ring seal in this groove; Upper cover and lower capping are all sealed and matched by the two ends of O-ring seal and bolt and main cavity; The bottom centre of upper cover is provided with the gas sensor be connected with computing machine, the top center of lower capping is provided with riser guide, riser guide is provided with the displacement transducer be connected with computing machine, the top of riser guide is fixed with open-topped protective cover; After riser guide rises, protective cover can with upper cover bottom form one gas sensor be enclosed in interior confined space; Be positioned on the upper cover outside seal cavity, be also provided with the first draft tube and the second draft tube, the first draft tube with the second draft tube is provided with the autovalve and electronic flow-meter that are connected with computing machine; Lower capping is provided with outlet pipe; The pressure transducer be connected with computing machine is provided with in main cavity; The cross section of described O-ring seal comprises the inclined-plane being arranged at top outer and the cambered surface being arranged at bottom, and described inclined-plane can form linear sealing structure with the first boss on main cavity.
2. the proving installation that can be used for gas sensor calibration according to claim 1, it is characterized in that: the side that described upper cover and lower capping match with main cavity is all also provided with the second boss, the cross section of described O-ring seal also comprises the flange being arranged at inside top, and this flange can be formed with the second boss on upper cover or lower capping and be sealed and matched.
3. the proving installation that can be used for gas sensor calibration according to claim 1, is characterized in that: described gas sensor, displacement transducer and pressure transducer all be positioned at the computing machine infrared radio demarcated outside container and be connected.
4. the proving installation that can be used for gas sensor calibration according to claim 1, is characterized in that: the bottom of described lower capping is provided with the some supporting legs with roller.
5. the proving installation that can be used for gas sensor calibration according to claim 1, is characterized in that: the surface of described O-ring seal is coated with silica gel investment precoat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915708.4A CN105424888B (en) | 2015-12-10 | 2015-12-10 | It is a kind of to be used for the test device of gas sensor calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915708.4A CN105424888B (en) | 2015-12-10 | 2015-12-10 | It is a kind of to be used for the test device of gas sensor calibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105424888A true CN105424888A (en) | 2016-03-23 |
| CN105424888B CN105424888B (en) | 2017-08-25 |
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| CN201510915708.4A Active CN105424888B (en) | 2015-12-10 | 2015-12-10 | It is a kind of to be used for the test device of gas sensor calibration |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106880992A (en) * | 2017-02-16 | 2017-06-23 | 大连艾科科技开发有限公司 | Laser sensing is popped one's head in and its filtering screen |
| CN107340013A (en) * | 2017-07-06 | 2017-11-10 | 深圳市建筑科学研究院股份有限公司 | Gas sensor response recovery time test device |
| CN107607672A (en) * | 2017-08-29 | 2018-01-19 | 广州海洋地质调查局 | A kind of underwater gas sensor calibrator (-ter) unit and calibration method |
| CN108132306A (en) * | 2017-12-25 | 2018-06-08 | 常州波速传感器有限公司 | A kind of self assembly oxygen concentration sensor |
| WO2020236480A1 (en) * | 2019-05-17 | 2020-11-26 | Carrier Corporation | Gas detector test and calibration method and apparatus |
| CN115372558A (en) * | 2022-08-22 | 2022-11-22 | 九江学院 | Gas sensor characteristic detection system and detection method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106880992A (en) * | 2017-02-16 | 2017-06-23 | 大连艾科科技开发有限公司 | Laser sensing is popped one's head in and its filtering screen |
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| CN107340013A (en) * | 2017-07-06 | 2017-11-10 | 深圳市建筑科学研究院股份有限公司 | Gas sensor response recovery time test device |
| CN107607672A (en) * | 2017-08-29 | 2018-01-19 | 广州海洋地质调查局 | A kind of underwater gas sensor calibrator (-ter) unit and calibration method |
| CN108132306A (en) * | 2017-12-25 | 2018-06-08 | 常州波速传感器有限公司 | A kind of self assembly oxygen concentration sensor |
| WO2020236480A1 (en) * | 2019-05-17 | 2020-11-26 | Carrier Corporation | Gas detector test and calibration method and apparatus |
| CN115372558A (en) * | 2022-08-22 | 2022-11-22 | 九江学院 | Gas sensor characteristic detection system and detection method thereof |
| CN115372558B (en) * | 2022-08-22 | 2024-09-03 | 九江学院 | Gas sensor characteristic detection system and detection method thereof |
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|---|---|
| CN105424888B (en) | 2017-08-25 |
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