CN203719962U - Injector used for gas sampling and capable of detecting airtightness - Google Patents
Injector used for gas sampling and capable of detecting airtightness Download PDFInfo
- Publication number
- CN203719962U CN203719962U CN201420062343.6U CN201420062343U CN203719962U CN 203719962 U CN203719962 U CN 203719962U CN 201420062343 U CN201420062343 U CN 201420062343U CN 203719962 U CN203719962 U CN 203719962U
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- China
- Prior art keywords
- plunger
- syringe
- utility
- spacing hole
- model
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Abstract
The utility model relates to a device for gas sampling, and particularly relates to an injector used for gas sampling and capable of detecting airtightness. The injector provided by the utility model includes an injection pipe provided with a gas nozzle, and a large plunger capable of longitudinally moving in the injection pipe. The injector further includes a small plunger arranged in the cavity of the large plunger, and the small plunger can move longitudinally in the cavity of the large plunger. Compared with the prior art, the injector provided by the utility model can be used for not only sampling a gas but also detecting the airtightness of the injector, the operation is convenient, and the injector is simple in structure and low in cost.
Description
Technical field
The utility model relates to a kind of device for gas sample, particularly a kind of for gas sample can check bubble-tight syringe.
Background technology
Scientific research, Detection of Air Quality, various gas examinations etc. all need to carry out gas sample, so get the accuracy of gaseous sample and the impermeability of preservation is particularly important for the result of gas experiment.At present, generally adopt syringe to carry out gas sample, but have following defect:
When syringe being carried out to impermeability detection, need to could detect to the impermeability of syringe by other utensil inconvenient operation.
Utility model content
The utility model object is to provide a kind of also can check bubble-tight syringe for gas sample, to solve syringe of the prior art when carrying out impermeability detection, need to could detect to the impermeability of syringe by other utensil the technical matters of inconvenient operation.
The utility model object is achieved through the following technical solutions:
A kind of for gas sample can check bubble-tight syringe, comprise with the injection-tube of valve and the large plunger that can vertically move in described injection-tube, also comprise the small plunger in the cavity that is arranged on described large plunger, described small plunger can vertically move in the cavity of described large plunger.By syringe of the present utility model, can not only carry out gas sample, also can detect the impermeability of syringe, easy to operate, and syringe is simple in structure, and cost is low.
In the utility model preferred embodiment, also comprise the limit body for spacing described small plunger motion, the sidewall of described large plunger is provided with the first spacing hole, described small plunger is provided with the second spacing hole, and described limit body can penetrate described the first spacing hole and described the second spacing hole with spacing described small plunger simultaneously.When needs carry out impermeability detection to syringe, limit body need to be extracted from the second spacing hole, small plunger can be moved in the cavity of large plunger; When not needing that syringe is carried out to impermeability while detecting, limit body penetrates described the first spacing hole and described the second spacing hole with spacing described small plunger simultaneously, small plunger can not be moved in the cavity of large plunger, thereby small plunger and large plunger can be synchronized with the movement.
In the utility model preferred embodiment, described limit body comprises straight pin.
In the utility model preferred embodiment, the front end of described small plunger can flush with the front end of described large plunger.During sampling, limit body penetrates described the first spacing hole and described the second spacing hole with spacing described small plunger simultaneously, small plunger can not be moved in the cavity of large plunger, thereby small plunger and large plunger can be synchronized with the movement, the front end of described small plunger can flush the air that can make to sample in front injection-tube and all be extruded with the front end of described large plunger, to guarantee the accuracy of sampling.
Compared with prior art, the utility model has following beneficial effect:
1. by syringe of the present utility model, can not only carry out gas sample, also can detect the impermeability of syringe, easy to operate, and syringe is simple in structure, and cost is low;
2. with syringe of the present utility model, carry out accuracy and the impermeability that gas sample can guarantee sample, the worker that solved is to the accuracy of gas sample and bubble-tight worry.
Accompanying drawing explanation
Fig. 1 is the cut-open view of syringe of the present utility model;
Fig. 2 is the cut-open view that large plunger of the present utility model moves upward with respect to injection-tube;
Fig. 3 is the cut-open view that small plunger of the present utility model moves upward with respect to large plunger.
Embodiment
The utility model is carrying out impermeability while detecting mainly for existing syringe, need to could detect the impermeability of syringe by other utensil, the defect of inconvenient operation, structure to syringe redesigns, and mainly on syringe, increases and can detect bubble-tight structure, by syringe of the present utility model, can not only carry out gas sample, also can detect the impermeability of syringe, easy to operate, and syringe is simple in structure, and cost is low.
Below in conjunction with preferred embodiment of the present utility model, the utility model is further described.
Embodiment 1
Refer to Fig. 1, syringe of the present utility model, comprises the injection-tube 2 with valve 5, large plunger 3 and the small plunger 4 that can vertically move in injection-tube 2, and small plunger 4 is arranged in the cavity of large plunger 3, and small plunger 4 can vertically move in the cavity of large plunger 3.
In the utility model preferred embodiment, also comprise the limit body 1 for spacing small plunger 4 motions, the sidewall of large plunger 3 is provided with the first spacing hole, and small plunger 4 is provided with the second spacing hole, and limit body 1 can penetrate the first spacing hole and the second spacing hole with spacing small plunger 4 simultaneously.When needs carry out impermeability detection to syringe, limit body 1 need to be extracted from the second spacing hole, small plunger 4 can be moved in the cavity of large plunger 3; When not needing that syringe is carried out to impermeability while detecting, limit body 1 penetrates the first spacing hole and the second spacing hole with spacing small plunger 4 simultaneously, small plunger 4 can not be moved in the cavity of large plunger 3, thereby small plunger 4 and large plunger 3 can be synchronized with the movement.
In the utility model preferred embodiment, limit body 1 is preferably straight pin.Size and the straight pin of the first spacing hole and the second spacing hole are suitable.
In the utility model preferred embodiment, the front end of small plunger 4 can flush with the front end of large plunger 3.During sampling, limit body 1 penetrates the first spacing hole and the second spacing hole with spacing small plunger 4 simultaneously, small plunger 4 can not be moved in the cavity of large plunger 3, thereby small plunger 4 and large plunger 3 can be synchronized with the movement, now, the front end of small plunger 4 flushes and can make the air sampling in front injection-tube 2 all be extruded with the front end of large plunger 3, to guarantee the accuracy of sampling.
While checking the impermeability of syringe, first straight pin being penetrated simultaneously in the first spacing hole and the second spacing hole is fixed together small plunger 4 and large plunger 3, now, the front end of small plunger 4 flushes with the front end of large plunger 3, large plunger 3 is got to the bottommost of injection-tube, all gas in injection-tube is discharged, as shown in Figure 1.Make again large plunger 3 move up to certain position L, got sample (can be air), close valve, as shown in Figure 2.Afterwards straight pin is extracted from the second spacing hole, promoted large plunger, under the state of not opening at valve, small plunger 4 moves up one end apart from d under the effect of injection-tube 2 internal gas pressures, if d is less than D, illustrates that the sealing of syringe is not good, as shown in Figure 3.Wherein, D refers to that syringe same model, good airproof performance is when carrying out above-mentioned impermeability detection, the distance that small plunger 4 moves up under the effect of injection-tube 2 internal gas pressures.
With syringe of the present utility model, carry out accuracy and the impermeability that gas sample can guarantee sample, the worker that solved is to the accuracy of gas sample and bubble-tight worry.
Disclosed is above only several specific embodiments of the application, but the application is not limited thereto, and the changes that any person skilled in the art can think of, all should drop in the application's protection domain.
Claims (4)
1. for gas sample, also can check bubble-tight syringe for one kind, comprise with the injection-tube of valve and the large plunger that can vertically move in described injection-tube, it is characterized in that, also comprise the small plunger in the cavity that is arranged on described large plunger, described small plunger can vertically move in the cavity of described large plunger.
2. as claimed in claim 1 for gas sample can check bubble-tight syringe, it is characterized in that, also comprise the limit body for spacing described small plunger motion, the sidewall of described large plunger is provided with the first spacing hole, described small plunger is provided with the second spacing hole, and described limit body can penetrate described the first spacing hole and described the second spacing hole with spacing described small plunger simultaneously.
3. as claimed in claim 2ly for gas sample can check bubble-tight syringe, it is characterized in that, described limit body comprises straight pin.
4. as claimed in claim 1ly for gas sample can check bubble-tight syringe, it is characterized in that, the front end of described small plunger can flush with the front end of described large plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420062343.6U CN203719962U (en) | 2014-02-12 | 2014-02-12 | Injector used for gas sampling and capable of detecting airtightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420062343.6U CN203719962U (en) | 2014-02-12 | 2014-02-12 | Injector used for gas sampling and capable of detecting airtightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203719962U true CN203719962U (en) | 2014-07-16 |
Family
ID=51159101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420062343.6U Expired - Fee Related CN203719962U (en) | 2014-02-12 | 2014-02-12 | Injector used for gas sampling and capable of detecting airtightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203719962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198229A (en) * | 2014-09-03 | 2014-12-10 | 中国科学院植物研究所 | Gas sampling injector |
-
2014
- 2014-02-12 CN CN201420062343.6U patent/CN203719962U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198229A (en) * | 2014-09-03 | 2014-12-10 | 中国科学院植物研究所 | Gas sampling injector |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20190212 |