CN203551537U - Critical oxygen index tester with gas mixing drum - Google Patents
Critical oxygen index tester with gas mixing drum Download PDFInfo
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- CN203551537U CN203551537U CN201320582014.XU CN201320582014U CN203551537U CN 203551537 U CN203551537 U CN 203551537U CN 201320582014 U CN201320582014 U CN 201320582014U CN 203551537 U CN203551537 U CN 203551537U
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- oxygen
- mixing drum
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- nitrogen
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Abstract
The utility model provides a critical oxygen index tester with a gas mixing drum. The critical oxygen index tester comprises a box body, wherein the box body is internally provided with an oxygen channel, a nitrogen channel and a controller, both the oxygen channel and the nitrogen channel are connected with the controller, a first ball valve, a first reducing valve, a first pressure gage, a first gas flowmeter and a first check valve are sequentially arranged between the outlet and the inlet of the oxygen channel, a second ball valve, a second reducing valve, a second pressure gage, a second gas flowmeter and a second check valve are sequentially arranged between the outlet and the inlet of the nitrogen channel, both the outlet of the oxygen channel and the outlet of the nitrogen channel are connected with the inlet of the gas mixing drum, and the outlet of the gas mixing drum is connected with a combustion cylinder. The critical oxygen index tester with the gas mixing drum is in a simple structure and good in stability, and is accurate in measurement data.
Description
Technical field
The utility model relates to a kind of analyzer, particularly a kind of critical oxygen index analyzer that is provided with gas mixing drum.
Background technology
Critical oxygen index method is, after oxygen/nitrogen is mixed, to measure and just maintain the sample needed minimum oxygen concentration of burning (volumetric molar concentration).Critical oxygen index analyzer is according to standard GB/T/T5454-1997 < < textile combustion method for testing performance-oxygen index method > >, the novel product of the technical requirement development of GB/T2406-1993 < < Plastics Combustion method for testing performance-oxygen index method > > regulation, be applicable to homogeneous solid material, laminated material, polyfoam, fabric, the burning performance test of the material such as film and film.Be mainly used to measure the number percent of polymer combustion process requisite oxygen, can be used as the means of identifying polymkeric substance flame retardancy, but also can be used as a kind of research tool--laboratory study flame-retardant formulations etc.Existing critical oxygen index analyzer, is to adopt to reach mixed effect at the little fine sand stone of the bottom of combustion barrel lay to the mixing of oxygen and nitrogen, thereby can causes undercompounding, the accuracy that impact is measured, causes result accuracy poor.In addition,, structurally also there is unreasonable part in existing critical oxygen index analyzer, not only complex structure, and also measurement result is also accurate not, and error is larger, and stability is also good not.
Utility model content
The technical problems to be solved in the utility model is the defect that overcomes prior art, provide a kind of simple in structure, measurement data accurately, the critical oxygen index analyzer of good stability.
In order to solve the problems of the technologies described above, the utility model provides following technical scheme:
A kind of critical oxygen index analyzer that is provided with gas mixing drum of the utility model, comprises casing, is provided with oxygen channel, channel of nitrogen, controller in described casing, and described oxygen channel is all connected with described controller with channel of nitrogen; Between the outlet of described oxygen channel and entrance, be provided with successively the first ball valve, the first reduction valve, the first tensimeter, the first gas meter and the first retaining valve; Between the outlet of described channel of nitrogen and entrance, be provided with successively the second ball valve, the second reduction valve, the second tensimeter, the second gas meter and the second retaining valve; The outlet of described oxygen channel and channel of nitrogen is all connected the entrance of gas mixing drum, and the outlet of described gas mixing drum connects combustion barrel.
Further, described gas mixing drum is connected with oxygen sensor.
Further, described controller is programmable controller PLC and expansion module.
The beneficial effect that the utility model reaches is:
(1) in the prime of burning bucket, increase the special gas mixing drum of one-level, can make oxygen, nitrogen fully mix, thereby solve because oxygen, nitrogen mix the inaccurate problem of the inhomogeneous measurement result causing.
(2) on gas mixing drum, be provided with oxygen sensor, thereby can control more accurately oxygen, nitrogen ratio, increase the degree of accuracy of measurement result.
(3) the utility model is simple in structure, easy to operate, stability is strong, and measuring result error is little.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for instructions, is used from explanation the utility model with embodiment mono-of the present utility model, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is structural principle schematic diagram of the present utility model.
Fig. 2 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
As depicted in figs. 1 and 2, a kind of critical oxygen index analyzer that is provided with gas mixing drum of the utility model, comprises casing 14, in described casing 14, is provided with oxygen channel, channel of nitrogen, controller, and described oxygen channel is all connected with described controller with channel of nitrogen; Between the outlet of described oxygen channel and entrance, be provided with successively the first ball valve 1, the first reduction valve 2, the first tensimeter 3, the first gas meter 4 and the first retaining valve 5; Between the outlet of described channel of nitrogen and entrance, be provided with successively the second ball valve 6, the second reduction valve 7, the second tensimeter 8, the second gas meter 9 and the second retaining valve 10; The outlet of described oxygen channel and channel of nitrogen is all connected the entrance of gas mixing drum 11, and the outlet of described gas mixing drum 11 connects combustion barrel 13.Before described oxygen channel and channel of nitrogen, be all provided with successively gas gauge, gas cylinder reduction valve, described gas cylinder reduction valve is connected respectively at welding bottle, nitrogen cylinder.Described gas mixing drum 11 is connected with oxygen sensor 12.Described controller is programmable controller PLC and expansion module.Controller is oxygen concentration, the nitrogen gas concn setting value that this analyzer is set from man-machine interface, calculating converts flow to, pass through again expansion module, digital control amount is changed into analog output to gas meter, by analog to digital converter, actual flow is fed back to PLC, finally by PLC, detected value digital output is provided with to the man-machine interface of the critical oxygen index analyzer of gas mixing drum to this.
The utility model, by increasing the special gas mixing drum of one-level in the prime of burning bucket, can make oxygen, nitrogen fully mix, thereby solves because oxygen, nitrogen mix the inaccurate problem of the inhomogeneous measurement result causing.On gas mixing drum, be provided with oxygen sensor, thereby can control more accurately oxygen, nitrogen ratio, increase the degree of accuracy of measurement result.In addition, the utility model is simple in structure, easy to operate, stability is strong, and measuring result error is little.
The utility model is in use:
1, oxygen index measurer is placed on workbench and (is preferably placed in fuming cupboard) and fixes steadily.With random subsidiary connecting pipe and source of the gas joint component, by oxygen, nitrogen interface after instrument, connect with corresponding oxygen, nitrogen cylinder interface respectively; Use again the nylon tube one termination combustion barrel base of random arrangement, another termination instrument back side nitrogen and oxygen interface.
2, power-on, waits for the touch-screen starting of analyzer.Open oxygen and nitrogen, pressure is transferred to 0.1Mpa; Valve cancel key on point touching screen cleans oxygen valve and nitrogen valve afterwards.
3, select initial oxygen concentration.By observing the aerial ignition conditions of sample, if sample burns rapidly, select initial oxygen concentration about 18%(volume fraction); If sample smoulder or unstable combustion, the initial oxygen concentration of selection is about 21%(volume fraction); If sample is discontinuous burning in air, the initial oxygen concentration of selection is at least 25%(volume fraction), this depends on the complexity of lighting or extinguishes the length of front burning time.
4, guarantee that combustion barrel is in plumbness.Sample is vertically mounted on to the center of described combustion barrel, makes the top of sample lower than at least 100mm of combustion barrel top mouth, the expose portion of the minimum point of sample will be higher than the end face 100mm of the gas dispersion apparatus of combustion barrel pedestal simultaneously.
5, oxygen, nitrogen start to flow into mixing chamber, and oxygen concentration reaches setting value, rinse combustion barrel 30s lighting before sample at least with mixed gas.Guarantee to light and sample main combustion period between gas flow rate constant.
Finally it should be noted that: the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. a critical oxygen index analyzer that is provided with gas mixing drum, comprises casing, is provided with oxygen channel, channel of nitrogen, controller in described casing, it is characterized in that:
Described oxygen channel is all connected with described controller with channel of nitrogen;
Between the outlet of described oxygen channel and entrance, be provided with successively the first ball valve, the first reduction valve, the first tensimeter, the first gas meter and the first retaining valve;
Between the outlet of described channel of nitrogen and entrance, be provided with successively the second ball valve, the second reduction valve, the second tensimeter, the second gas meter and the second retaining valve;
The outlet of described oxygen channel and channel of nitrogen is all connected the entrance of gas mixing drum, and the outlet of described gas mixing drum connects combustion barrel.
2. a kind of critical oxygen index analyzer that is provided with gas mixing drum according to claim 1, is characterized in that: described gas mixing drum is connected with oxygen sensor.
3. a kind of critical oxygen index analyzer that is provided with gas mixing drum according to claim 1, is characterized in that: described controller is programmable controller PLC and expansion module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582014.XU CN203551537U (en) | 2013-09-18 | 2013-09-18 | Critical oxygen index tester with gas mixing drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320582014.XU CN203551537U (en) | 2013-09-18 | 2013-09-18 | Critical oxygen index tester with gas mixing drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551537U true CN203551537U (en) | 2014-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320582014.XU Expired - Fee Related CN203551537U (en) | 2013-09-18 | 2013-09-18 | Critical oxygen index tester with gas mixing drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203551537U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645553A (en) * | 2016-12-24 | 2017-05-10 | 天津达元吉科技有限公司 | Oxygen index test apparatus |
| CN113791171A (en) * | 2021-10-15 | 2021-12-14 | 湖南美莱珀科技发展有限公司 | Flame retardant material flame retardant property detection device |
-
2013
- 2013-09-18 CN CN201320582014.XU patent/CN203551537U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645553A (en) * | 2016-12-24 | 2017-05-10 | 天津达元吉科技有限公司 | Oxygen index test apparatus |
| CN113791171A (en) * | 2021-10-15 | 2021-12-14 | 湖南美莱珀科技发展有限公司 | Flame retardant material flame retardant property detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20170918 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |