CN205263060U

CN205263060U - Testing arrangement that can be used for gas sensor demarcation

Info

Publication number: CN205263060U
Application number: CN201521027249.8U
Authority: CN
Inventors: 陆辰钊
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2016-05-25
Anticipated expiration: 2025-12-10

Abstract

The utility model discloses a testing arrangement that can be used for gas sensor demarcation, personally experience sth. Part of the body, go up closing cap and lower closing cap including the main cavity, go up the closing cap and all seal the cooperation through the both ends of sealing washer and the bolt and the main cavity body with lower closing cap, going up the closing cap and being equipped with gas sensor, lower closing cap is equipped with the riser guide, is equipped with to move the sensor fixed safety cover on the riser guide on the riser guide, when the riser guide back of rising, the safety cover can with one last closing cap formation with gas sensor the airtight space including airtight, be located the last closing cap in the confined space outside, be equipped with first intake pipe and second intake pipe, all be equipped with automatic valve and electronic flowmeter in first intake pipe and the second intake pipe, the internal pressure sensor that is equipped with of main cavity, the cross -section of sealing washer includes inclined plane and cambered surface, and the inclined plane can become line seal structure with the boss shape on the main cavity body. After adopting above -mentioned structure, sealing performance is good, and discovery in time is sealed bad, can detect gas sensor's quick response nature simultaneously and judge.

Description

A kind of testing arrangement that can be used for gas sensor calibration

Technical field

A kind of servicing unit, particularly a kind of testing arrangement that can be used for gas sensor calibration when the utility model relates to gas sensor production and uses.

Background technology

What with sensor, material concentration is measured to general using is the incidence relation between sensor response and test substance concentration. And the zero point of sensor and sensitivity in use inevitably can be drifted about. In order to obtain measured value more accurately, before generally all requiring to measure, sensor is demarcated.

Demarcation need to be measured sensor with the standard substance of concentration known, and for liquid, solid matter, the acquisition of standard substance concentration is relatively easy, generally weighs by assay balance in laboratory, and volumetric flask constant volume just can be accomplished.

And Demarcate Gas is the value that produced using a kind of high precision apparatus ruler as tolerance substantially, be input in sensor to be calibrated, obtain the output quantity of sensor, then by mathematical method, the corresponding relation between obtaining sensor input and exporting. The demarcation of gas sensor, the known calibrating gas of normal working concentration is as input value, sensor put into the airtight container that is filled with calibrating gas it is demarcated.

Therefore, the sealing of container seems and is even more important.

At present, normal bonding jelly stickup instrument main cavity and the remaining part of adopting in existing gas sensor calibration instrument, bonding jelly has certain influence to gas concentration, and sealing effectiveness is bad, and this makes the demarcation of light concentration gas have larger difficulty. In addition, existing calibrating instrument cannot reclaim gas mostly, and being discharged into airborne marked gas can pollute atmosphere, even impacts demarcating the healthy of personnel.

So, for the shortcoming of existing calibrating instrument, be necessary to develop a kind of new gas sensor calibration container, in promoting instrument sealing, accomplish the protection to environment and staff.

December 31 in 2014, disclosed application number was No. 201420505880.3 Chinese utility model patents, the name that its utility model is created is called " gas sensor calibration container ", 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; On the cover plate of left side, be fixed with threeway; One end of threeway is air inlet, and air inlet is provided with air inlet check-valves; One end is gas outlet, offers three through holes on the cover plate of left side, and gas outlet is communicated with main cavity by three through holes; One end is connected with densitometer; On the cover plate of right side, be fixed with insulating disc and two-way; On insulating disc, run through multiple binding posts, one end of binding post is positioned at main cavity inside, and one end is positioned at insulating disc outside; On the cover plate of right side, offer through hole, one end of this two-way is communicated with main cavity by through hole, and the other end is connected with aspiration pump, is provided with gas outlet check-valves in two-way; Aspiration pump is communicated with returnable bottle.

Although the use of bonding jelly has been avoided in above-mentioned patent application, and can reclaim waste gas. But, need left side cover plate, right side cover plate simultaneously with the sealing of main cavity, aperture area is large, sealing effectiveness is poor. In addition, commercially available sealing ring elasticity is little, and anti-wear performance is poor, use after a period of time, easily wearing and tearing or aging, when wearing and tearing or aging after, be difficult for realizing, easily cause that to demarcate seal of vessel performance poor, easily gas leakage, is 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 the fast-response of gas sensor be detected and be judged.

Utility model content

The technical problems to be solved in the utility model is for above-mentioned the deficiencies in the prior art, and provide a kind of testing arrangement that can be used for gas sensor calibration, this can be used for the testing arrangement good seal performance of gas sensor calibration, and can find in time poor sealing, can the fast-response of gas sensor be detected and be judged simultaneously.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

A kind of testing arrangement that can be used for gas sensor calibration, comprise main cavity, upper cover and the lower capping of upper and lower both ends open, on the end face of two ends up and down of main cavity, be provided with the first boss, the side that upper cover and lower capping match with main cavity is provided with groove, in this groove, is placed with sealing ring; Upper cover and lower capping all coordinate with the sealed at both ends of main cavity by sealing ring and bolt; The bottom centre of upper cover is provided with the gas sensor being connected with computer, the top center of lower capping is provided with riser guide, on riser guide, be provided with the displacement transducer being connected with computer, the top of riser guide is fixed with open-topped protective cover; After riser guide rises, protective cover can form one with upper cover bottom gas sensor is enclosed in to interior confined space; Be positioned on the upper cover in seal cavity outside, be also provided with the first air inlet pipe and the second air inlet pipe, the first air inlet pipe with in the second air inlet pipe, be provided with the automatic valve and the electronic flowmeter that are connected with computer; In lower capping, be provided with outlet pipe; In main cavity, be provided with the pressure sensor being connected with computer; The cross section of described sealing ring comprises the cambered surface that is arranged at the inclined-plane of top outer and is arranged at bottom, described inclined-plane can with main cavity on the first boss form linear sealing structure.

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 sealing ring also comprises the flange that is arranged at inside top, this flange can with upper cover or lower capping on second boss form be sealed and matched.

Described gas sensor, displacement transducer and pressure sensor are all connected with the computer infrared radio being positioned at outside demarcation container.

The bottom of described lower capping is provided with the some supporting legs with roller.

The surface-coated of described sealing ring has silica gel investment precoat.

The utility model adopts after said structure, has following beneficial effect:

1. above-mentioned protective cover can be sealed in gas sensor in the seal cavity that area is less; can first be filled with the gas that need to carry out response detection outward at this little seal cavity; then; riser guide is declined rapidly; gas sensor energy moment is exposed to need to carry out in the gas of response detection; thereby in carrying out gas sensor calibration, can also carry out demarcation and the detection of gas sensor response. In addition, displacement transducer can be controlled the lifting of riser guide automatically, controls more accurate. Further, the setting of the first air inlet pipe, the second air inlet pipe, automatic valve and electronic flowmeter, by the control to throughput and gas concentration in the first air inlet pipe or the second air inlet pipe, make the gas in main cavity present different concentration, can detect the response of gas sensor in the time of gas with various concentration, also can carry out corrosive detection.

2. inclined design in above-mentioned sealing ring, can make the first boss on sealing ring and main cavity form linear sealing structure, and inclined-plane pressurized can effectively prevent that gas from entering main cavity from the position of sealing ring pressurized, and sealing effectiveness is reliable; Wherein cambered surface design, can effectively solve main cavity and upper cover or lower envelope cover bolt and be fixed and clamped time, sealing ring is because of the inhomogeneous generation deformation that is stressed, and the problem that the slight gap of bringing causes main cavity to leak gas; Effectively improve sealing effectiveness; In addition, flange design, easy to assembly, ensure to there will not be upset, distortion in assembling process, ensure pressure surface planarization. In addition, the setting of silica gel investment precoat, makes sealing ring more wear-resisting.

3. the setting of above-mentioned pressure sensor, can pass through to detect the variation of main cavity internal pressure, thereby monitors the sealing property of demarcation container and give 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 sensor is all connected with computer infrared radio with gas sensor, the gas leakage problem of avoiding threading to cause, the sealing property that has further ensured to demarcate container.

Brief description of the drawings

Fig. 1 is the structural representation of a kind of testing arrangement that can be used for gas sensor calibration of the utility model;

Fig. 2 has shown the schematic cross-section of sealing ring in Fig. 1;

Fig. 3 has shown the assembling schematic diagram of sealing ring and lower capping.

Wherein have:

1. main cavity; 11. first boss;

2. upper cover;

21. first air inlet pipe; 211. automatic valve; 212. electronic flowmeter;

22. second air inlet pipe;

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 sensor;

8. air feed bottle;

9. sealing ring; 91. inclined-planes; 92. cambered surfaces; 93. flange;

10. returnable bottle.

Detailed description of the invention

Below in conjunction with accompanying drawing and concrete preferred embodiments, the utility model is described in further detail.

As shown in Figure 1, a kind of testing arrangement that can be used for gas sensor calibration, comprises main cavity 1, upper cover 2 and the lower capping 3 of upper and lower both ends open.

As shown in Figure 3, on the end face of two ends up and down of main cavity, be provided with the first boss, the side that upper cover and lower capping match with main cavity is provided with groove, in this groove, is placed with sealing ring; Upper cover and lower capping all coordinate with the sealed at both ends of main cavity by sealing ring and bolt.

The bottom centre of upper cover is provided with the gas sensor being connected with computer.

The top center of lower capping is provided with riser guide, is provided with the displacement transducer being connected with computer on riser guide, and the top of riser guide is fixed with open-topped protective cover.

After riser guide rises, protective cover can form one with upper cover bottom gas sensor is enclosed in to interior confined space.

Be positioned on the upper cover in seal cavity outside, be also provided with the first air inlet pipe and the second air inlet pipe, the first air inlet pipe with in the second air inlet pipe, be provided with the automatic valve and the electronic flowmeter that are connected with computer.

The setting of the first air inlet pipe, the second air inlet pipe, automatic valve and electronic flowmeter, can pass through the control to throughput and gas concentration in the first air inlet pipe or the second air inlet pipe, make the gas in main cavity present different concentration, can detect the response of gas sensor in the time of gas with various concentration, also can carry out corrosive detection.

When practical operation, after the gas of two kinds of variable concentrations mixes in the main cavities such as need, then riser guide is declined rapidly, gas sensor moment is exposed to and need to carries out, in the gas of response detection, carrying out demarcation and the detection of gas sensor response.

In lower capping, be provided with outlet pipe; In main cavity, be provided with the pressure sensor being connected with computer.

As shown in Figure 2, the cross section of sealing ring comprises the cambered surface that is arranged at the inclined-plane of top outer and is arranged at bottom, described inclined-plane can with main cavity on the first boss form linear sealing structure.

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 sealing ring also comprises the flange that is arranged at inside top, this flange can with upper cover or lower capping on second boss form be sealed and matched.

Further, gas sensor, displacement transducer and pressure sensor are all connected with the computer infrared radio being positioned at outside demarcation container.

Further, the bottom of lower capping is provided with the some supporting legs with roller.

Further, the surface-coated of sealing ring has silica gel investment precoat.

More than describe preferred embodiment of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple equivalents to the technical solution of the utility model, these equivalents all belong to protection domain of the present utility model.

Claims

1. one kind can be used for the testing arrangement of gas sensor calibration, it is characterized in that: comprise main cavity, upper cover and the lower capping of upper and lower both ends open, on the end face of two ends up and down of main cavity, be provided with the first boss, the side that upper cover and lower capping match with main cavity is provided with groove, in this groove, is placed with sealing ring; Upper cover and lower capping all coordinate with the sealed at both ends of main cavity by sealing ring and bolt; The bottom centre of upper cover is provided with the gas sensor being connected with computer, the top center of lower capping is provided with riser guide, on riser guide, be provided with the displacement transducer being connected with computer, the top of riser guide is fixed with open-topped protective cover; After riser guide rises, protective cover can form one with upper cover bottom gas sensor is enclosed in to interior confined space; Be positioned on the upper cover in seal cavity outside, be also provided with the first air inlet pipe and the second air inlet pipe, the first air inlet pipe with in the second air inlet pipe, be provided with the automatic valve and the electronic flowmeter that are connected with computer; In lower capping, be provided with outlet pipe; In main cavity, be provided with the pressure sensor being connected with computer; The cross section of described sealing ring comprises the cambered surface that is arranged at the inclined-plane of top outer and is arranged at bottom, described inclined-plane can with main cavity on the first boss form linear sealing structure.

2. the testing arrangement 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 sealing ring also comprises the flange that is arranged at inside top, this flange can with upper cover or lower capping on second boss form be sealed and matched.

3. the testing arrangement that can be used for gas sensor calibration according to claim 1, is characterized in that: described gas sensor, displacement transducer and pressure sensor are all connected with the computer infrared radio being positioned at outside demarcation container.

4. the testing arrangement 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 testing arrangement that can be used for gas sensor calibration according to claim 1, is characterized in that: the surface-coated of described sealing ring has silica gel investment precoat.