CN212568139U - Gas sampling device - Google Patents
Gas sampling device Download PDFInfo
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- CN212568139U CN212568139U CN202021555047.1U CN202021555047U CN212568139U CN 212568139 U CN212568139 U CN 212568139U CN 202021555047 U CN202021555047 U CN 202021555047U CN 212568139 U CN212568139 U CN 212568139U
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- gas sampling
- mounting
- plug
- sampling device
- sampling bag
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Abstract
The utility model discloses a gas sampling device, include: an air pump; the barrel body is connected with the air pump through a pipeline; the cover body is arranged above the barrel body, a mounting hole is formed in the center of the cover body, and a sealing cover is arranged on one side of the mounting hole; the vacuum sampling bag is arranged in the barrel body, the upper end of the vacuum sampling bag is provided with an installation pipe, and the installation pipe is detachably connected with the installation hole; the one-way valve is arranged in the mounting pipe; the sealing membrane body is arranged in the mounting pipe and is positioned below the one-way valve; the utility model discloses a vacuum sampling bag carries out gaseous sampling, and this vacuum sampling bag can be disposable, can not influence the inspection result of follow-up gaseous sampling.
Description
Technical Field
The utility model belongs to the technical field of environmental monitoring, in particular to gas sampling device.
Background
Among the prior art, inhale gas and discharge to a jar internal gas sampling through an air pump, and this kind of sampling mode can lead to having the pollutant to remain in the air pump, and then causes the pollution to subsequent sampling gas, leads to the measured data inaccurate, is difficult to the gaseous pollutant content of reaction.
Disclosure of Invention
The utility model aims at providing a gas sampling device to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a gas sampling assembly comprising:
an air pump;
the barrel body is connected with the air pump through a pipeline;
the cover body is arranged above the barrel body, a mounting hole is formed in the center of the cover body, and a sealing cover is arranged on one side of the mounting hole;
the vacuum sampling bag is arranged in the barrel body, the upper end of the vacuum sampling bag is provided with an installation pipe, and the installation pipe is detachably connected with the installation hole;
the one-way valve is arranged in the mounting pipe;
and the sealing film body is arranged in the mounting pipe and is positioned below the one-way valve.
The mounting hole is characterized in that an internal thread I is arranged on the inner wall of the mounting hole, an external thread I matched with the internal thread I is arranged in the middle section of the outer side wall of the mounting pipe, and an annular blocking edge is arranged at the upper end of the external thread I.
The outer diameter of the lower end of the mounting pipe is smaller than the major diameter of the first external thread.
Be equipped with annular baffle on the installation pipe inner wall, the aperture of annular baffle hole is crescent from top to bottom.
The check valve comprises a supporting plate, a connecting rod, a spring and a plug, wherein the supporting plate is connected with the plug through the connecting rod, the spring is arranged between the supporting plate and the plug, and the plug is matched with an inner hole of the annular baffle; one end of the spring is abutted against the abutting plate, and the other end of the spring is abutted against the annular baffle plate.
The lower end of the plug is provided with a pointed end.
And the lower end of the inner wall of the mounting pipe is provided with a second internal thread.
The lower end of the inner wall of the mounting pipe is also provided with a threaded sleeve, and the outer side wall of the threaded sleeve is provided with a second external thread matched with the second internal thread.
The vacuum sampling bag is provided with a plurality of folds.
The gas sampling device further comprises a vehicle body, the air pump and the barrel body are fixedly arranged on the vehicle body, rollers are arranged below the vehicle body, and a pushing handle is arranged on one side of the vehicle body.
Compared with the prior art, the utility model has the advantages that,
before use, the mounting pipe is mounted on the mounting hole of the cover body, the cover body is covered on the barrel body, the sealing cover is closed, the abutting plate is pressed manually, the pointed end punctures the sealing membrane body, then the pressing of the abutting plate is stopped, the pressure in the vacuum sampling bag is smaller than the pressure above the abutting plate, the plug moves downwards, a gap is formed between the plug and the inner hole of the annular baffle plate, external gas enters the vacuum sampling bag, meanwhile, the air suction pump is started to form negative pressure in the barrel body, the gas can be accelerated to flow into the vacuum sampling bag, after folds on the vacuum sampling bag are all opened, the air suction pump is manually closed, the sealing cover is opened, the pressure in the vacuum sampling bag is larger than the external pressure, the inner hole of the annular baffle plate is blocked again by the plug, the gas leakage in the vacuum sampling bag is avoided, the cover body is taken down, the mounting pipe with the vacuum sampling bag is detached from the, and then gas sampling can be completed.
The utility model discloses a vacuum sampling bag carries out gaseous sampling, and this vacuum sampling bag can be disposable, can not influence the inspection result of follow-up gaseous sampling.
Drawings
Fig. 1 is a schematic view of the present invention.
Fig. 2 is a front view of the mounting tube.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
FIG. 4 is a schematic view of the installation of a vacuum sampling bag.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in the figure: a gas sampling assembly comprising:
an air pump 6;
the barrel body 7 is connected with the air pump 6 through a pipeline;
the cover body 2 is arranged above the barrel body 7, a mounting hole is formed in the center of the cover body 2, and a sealing cover 4 is arranged on one side of the mounting hole;
the vacuum sampling bag 5 is arranged in the barrel body 7, the upper end of the vacuum sampling bag 5 is provided with an installation pipe 3, and the installation pipe 3 is detachably connected with the installation hole; the vacuum sampling bag can be a disposable product;
the one-way valve is arranged in the installation pipe 3;
and the sealing membrane body 32 is arranged in the installation pipe 3 and is positioned below the one-way valve.
Be equipped with internal thread one on the mounting hole inner wall, the lateral wall middle section of installation pipe 3 be equipped with internal thread one assorted external screw thread 31, the upper end of external screw thread 31 is equipped with cyclic annular flange 37.
When the mounting pipe 3 is mounted on the lid body 2, the lower surface of the annular flange 37 abuts against the lid body 2.
The outer diameter of the lower end of the mounting pipe 3 is smaller than the major diameter of the first external thread 31.
Be equipped with annular baffle 34 on the installation pipe 3 inner wall, the aperture of annular baffle 34 hole is crescent from top to bottom.
The check valve comprises a resisting plate 81, a connecting rod 82, a spring 83 and a plug 84, the resisting plate 81 is connected with the plug 84 through the connecting rod 82, the spring 83 is arranged between the resisting plate 81 and the plug 84, and the plug 84 is matched with an inner hole of the annular baffle 34; one end of the spring 83 abuts against the abutting plate 81, and the other end of the spring 83 abuts against the annular baffle 34.
The plug 84 is provided at its lower end with a pointed tip 85.
Before the vacuum sampling bag is used, the abutting plate 81 is manually pressed, so that the pointed end 85 punctures the sealing membrane 32, then the abutting plate 81 stops being pressed, the pressure in the vacuum sampling bag 5 is smaller than the pressure above the abutting plate 81, the plug 84 moves downwards, a gap is formed between the plug 84 and the inner hole of the annular baffle 34, external gas enters the vacuum sampling bag 5, meanwhile, the air suction pump 6 is started, negative pressure is formed in the barrel body 7, and the gas can flow into the vacuum sampling bag 5 at an accelerated speed.
And the lower end of the inner wall of the mounting pipe 3 is provided with a second internal thread 33.
The lower end of the inner wall of the mounting pipe 3 is further provided with a threaded sleeve 35, and the outer side wall of the threaded sleeve 35 is provided with a second external thread matched with the second internal thread 33.
The vacuum sampling bag 5 is provided with a plurality of folds.
The opening at the upper end of the vacuum sampling bag 5 is stretched into the inner hole of the threaded sleeve 35 according to the direction indicated by the arrow in fig. 4, the upper end of the vacuum sampling bag is bent, the edge of the opening at least extends to the external thread II of the threaded sleeve 35, and then the threaded sleeve 35 is in threaded connection with the mounting tube 3, so that the vacuum sampling bag 5 can be fixed.
After the vacuum sampling bag 5 is fixed, the vacuum sampling bag 5 is vacuumized, and no outside air enters the vacuum sampling bag 5 after the vacuum sampling bag is vacuumized because of the sealing film body 32.
Before use, the mounting tube 3 is mounted on the mounting hole of the cover body 2, then the cover body 2 is covered on the barrel body 7, the sealing cover 4 is closed, the abutting plate 81 is manually pressed, the pointed end 85 punctures the sealing membrane body 32, then the abutting plate 81 is stopped being pressed, the pressure in the vacuum sampling bag 5 is smaller than the pressure above the abutting plate 81, the plug 84 moves downwards, a gap is formed between the plug 84 and the inner hole of the annular baffle 34, external gas enters the vacuum sampling bag 5, meanwhile, the air pump 6 is started to form negative pressure in the barrel body 7, the gas can be accelerated to flow into the vacuum sampling bag 5, when wrinkles on the vacuum sampling bag 5 are all propped open, the air pump 6 is manually closed, the sealing cover 4 is opened, the pressure in the vacuum sampling bag 5 is larger than the external pressure, the plug 84 blocks the inner hole of the annular baffle 34 again, and the gas leakage in the vacuum sampling bag 5 is avoided, and (3) taking down the cover body 2, and dismantling the mounting pipe 3 with the vacuum sampling bag 5 from the cover body 2 to finish gas sampling.
In order to facilitate the position transfer of the sampling device, structures such as a vehicle body can be further arranged, specifically, the gas sampling device further comprises a vehicle body, the air pump 6 and the barrel body 7 are fixedly arranged on the vehicle body, a roller is arranged below the vehicle body, and a pushing handle 1 is arranged on one side of the vehicle body.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A gas sampling assembly, comprising:
an air pump;
the barrel body is connected with the air pump through a pipeline;
the cover body is arranged above the barrel body, a mounting hole is formed in the center of the cover body, and a sealing cover is arranged on one side of the mounting hole;
the vacuum sampling bag is arranged in the barrel body, the upper end of the vacuum sampling bag is provided with an installation pipe, and the installation pipe is detachably connected with the installation hole;
the one-way valve is arranged in the mounting pipe;
and the sealing film body is arranged in the mounting pipe and is positioned below the one-way valve.
2. The gas sampling device of claim 1, wherein the inner wall of the mounting hole is provided with a first internal thread, the middle section of the outer side wall of the mounting tube is provided with a first external thread matched with the first internal thread, and the upper end of the first external thread is provided with an annular retaining edge.
3. The gas sampling assembly of claim 2, wherein the outer diameter of the lower end of the mounting tube is less than the major diameter of the first external thread.
4. The gas sampling device according to claim 3, wherein the inner wall of the mounting tube is provided with an annular baffle, and the aperture of the inner hole of the annular baffle is gradually increased from top to bottom.
5. The gas sampling device of claim 4, wherein the one-way valve comprises a resisting plate, a connecting rod, a spring and a plug, the resisting plate is connected with the plug through the connecting rod, the spring is arranged between the resisting plate and the plug, and the plug is matched with an inner hole of the annular baffle; one end of the spring is abutted against the abutting plate, and the other end of the spring is abutted against the annular baffle plate.
6. The gas sampling assembly of claim 5, wherein the plug is provided with a pointed tip at a lower end thereof.
7. The gas sampling device of claim 6, wherein the lower end of the inner wall of the mounting tube is provided with a second internal thread.
8. The gas sampling device according to claim 7, wherein a threaded sleeve is further provided at the lower end of the inner wall of the mounting tube, and an external thread II matched with the internal thread II is provided on the outer side wall of the threaded sleeve.
9. The gas sampling assembly of any of claims 1-8, wherein said vacuum sampling bag is provided with a plurality of pleats.
10. The gas sampling device of claim 9, further comprising a cart, wherein the suction pump and the barrel are both fixed to the cart, rollers are disposed under the cart, and a push handle is disposed on one side of the cart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021555047.1U CN212568139U (en) | 2020-07-31 | 2020-07-31 | Gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021555047.1U CN212568139U (en) | 2020-07-31 | 2020-07-31 | Gas sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212568139U true CN212568139U (en) | 2021-02-19 |
Family
ID=74631558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021555047.1U Active CN212568139U (en) | 2020-07-31 | 2020-07-31 | Gas sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212568139U (en) |
-
2020
- 2020-07-31 CN CN202021555047.1U patent/CN212568139U/en active Active
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