CN207215530U - A kind of powder-dust sampling meter - Google Patents
A kind of powder-dust sampling meter Download PDFInfo
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- CN207215530U CN207215530U CN201721274789.5U CN201721274789U CN207215530U CN 207215530 U CN207215530 U CN 207215530U CN 201721274789 U CN201721274789 U CN 201721274789U CN 207215530 U CN207215530 U CN 207215530U
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- China
- Prior art keywords
- filter membrane
- housing
- valve
- exocoel
- sample gas
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Abstract
It the utility model is related to sampling apparatus, and in particular to a kind of powder-dust sampling meter.Including housing, the top of housing is sample gas import, and sample gas entrance is provided with valve I；The import of sample gas is connected by valve II with nitrogen inlet, communicated by valve I with the inner chamber of housing, housing cavity cavity wall is internal layer filter membrane, internal layer filter membrane is connected with probe tube, junction is provided with valve III, probe tube bore is the 1/3 1/2 of housing cavity bore, and the circle of internal layer filter membrane lower section one is uniformly provided with some ventholes；The inner chamber of housing is externally provided with exocoel, and exocoel is socketed with interior cavity gap, and outer chamber wall is outer layer filter membrane, is socketed in below exocoel in heating chamber, and heating chamber is provided with high-temperature steam entrance and high-temperature steam outlet, connects steam (vapor) outlet above exocoel, steam outlet is provided with valve；Probe tube connects with negative pressure mechanism.The present apparatus can be partially separated vapor oil gas and dust, improve the service life of filter membrane；The structure of double-layered filtration film, it is possible to increase the accuracy of testing result.
Description
Technical field
It the utility model is related to sampling apparatus, and in particular to a kind of powder-dust sampling meter.
Background technology
Dust refers to the aerial solia particle that suspends, and traditionally has many titles to dust, such as dust, dust, cigarette
Dirt, powder etc., ISO, solid suspension of the particle diameter less than 75 μm are defined as dust.Dust in an atmosphere
One of presence the main reason for being to maintain global warming, excessive or very few dust can all produce calamitous to environment in air
Influence, but in live and work, industrial dust is the natural enemy of human health, there is the main reason for inducing a variety of diseases,
Therefore need to detect air quality, but traditional powder-dust sampling meter extracts the air in filter core using aspiration pump, by powder
Dirt is rested on the filter membrane of outside, and sampling removes sampling head after terminating, and filter membrane is taken away detection, but water is easily mixed with air and is steamed
Gas, oily matter etc., easily block filter membrane, cause the service life of filter membrane to decline, also bring larger error to testing result.
Utility model content
Technical problem to be solved in the utility model is that traditional powder-dust sampling meter is extracted in filter core using aspiration pump
Air, dust is rested on the filter membrane of outside, sampling removes sampling head after terminating, and filter membrane is taken away detection, but holds in air
Easily be mixed with vapor, oily matter etc., easily block filter membrane, cause the service life of filter membrane to decline, also to testing result bring compared with
Big error.
To solve the above problems, the utility model provides a kind of powder-dust sampling meter, including housing, the top of housing is sample gas
Import, sample gas entrance are provided with valve I, and during sampling, under test gas enters sampling instrument housing from sample inlet；Sample gas import passes through
Valve II is connected with nitrogen inlet, and being pressed into nitrogen by nitrogen inlet after sampling purges；Sample gas import passes through valve I and housing
Inner chamber communicate, sampling when close valve II open valve I enter sample gas sampling, housing cavity cavity wall is internal layer filter membrane, interior
Dust in the layer direct absorption sample gas of filter membrane, internal layer filter membrane are connected with probe tube, and junction is provided with valve III, by opening valve
III, connection negative pressure mechanism (such as air pump), extract sample gas and sampled；Probe tube bore is the 1/3-1/2 of housing cavity bore, interior
A circle is uniformly provided with some ventholes below layer filter membrane, and such structure causes sample gas pressure when by sampling nozzle to increase,
Flows decrease, enter outer layer filter membrane from venthole；The inner chamber of housing is externally provided with exocoel, and exocoel is socketed with interior cavity gap, outer chamber wall
For outer layer filter membrane, for receiving the sample gas entered from internal layer filter membrane, sample flow of air direction is from top to bottom, exocoel lower section is socketed in
In heating chamber, heating chamber is provided with high-temperature steam entrance and high-temperature steam outlet, and steam (vapor) outlet, steam outlet are connected above exocoel
Provided with valve, the heating chamber of lower section heats below exocoel, avoids vapor etc. from condensing, while using heating water is steamed
Gas and oil gas rise to be separated with dust fractions, and adsorbing powder dust is on outer layer filter membrane, vapor and oil gas from steam (vapor) outlet effusion,
So as to improve the accuracy of the service life of filter membrane and testing result；Outer bottom of chamber is detachable, such as clamping, under being gone after sampling
Outer bottom of chamber is sampled or cleaned；Probe tube connects with negative pressure mechanism, for drawing sample gas；Each valve and housing use stainless steel
Into heat-resisting durable.
Further, the housing is externally provided with vacuum insulation layer, prevents from scalding staff during use.
Further, the filter membrane is dust filtration bag, and dust absorbing is good, and accuracy of detection is high.
Further, the import of sample gas is connected by curved tube with pipeline, realizes the dust sampling of horizontal pipeline, the scope of application is more
Extensively.
Specific operation process is as follows：
Valve II is closed, opens valve I and valve III, adjusts negative pressure mechanism adsorptive pressure and speed, sucks sample gas, sample gas
After internal layer filter membrane adsorption of dust, pressure increases when by sampling nozzle, flows decrease, is partly escaped from probe tube, part
Enter outer layer filter membrane from venthole, open high-temperature steam entrance and high-temperature steam outlet heats to heating chamber, avoid water from steaming
Gas etc. condenses, while using heating vapor and oil gas rising is separated with dust fractions, and adsorbing powder dust is in outer layer filter membrane
On, vapor and oil gas escape from steam (vapor) outlet；After sampling terminates, valve I is closed, valve II is opened and is purged.
The utility model has the advantages that：
1. using the heated rising of vapor and oil gas, vapor oil gas and dust are partially separated, improves the use of filter membrane
Life-span.
2. the structure of double-layered filtration film, it is possible to increase the accuracy of testing result.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
In figure, housing 1, sample gas import 11, valve I 12, valve II 13, nitrogen inlet 14, internal layer filter membrane 21, outer layer filter membrane
22nd, valve III 23, heating chamber 24, high-temperature steam entrance 25, high-temperature steam outlet 26, steam (vapor) outlet 27.
Embodiment
The utility model is made below in conjunction with the accompanying drawings described further below, but the utility model is not limited to specific reality
Apply example.
Embodiment 1：
A kind of powder-dust sampling meter, including housing 1, the top of housing 1 is sample gas import 11, and sample gas entrance is provided with valve I
12, during sampling, under test gas enters sampling instrument housing from sample inlet；Sample gas import 11 passes through valve II 13 and nitrogen inlet 14
It is connected, being pressed into nitrogen by nitrogen inlet after sampling purges；Sample gas import 11 is communicated by valve I 12 with the inner chamber of housing 1,
Valve II 13 is closed when sampling and opens valve I 12 into the sampling of sample gas, the inner chamber cavity wall of housing 1 is internal layer filter membrane 21, and internal layer is filtered
Dust in the direct absorption sample gas of film, internal layer filter membrane 21 are connected with probe tube, and junction is provided with valve III 23, by opening valve
III 23, connection negative pressure mechanism (such as air pump), extract sample gas and sampled；Probe tube bore is the 1/3-1/ of the inner chamber bore of housing 1
2, the circle of the lower section of internal layer filter membrane 21 one is uniformly provided with some ventholes, and such structure causes sample gas pressure when by sampling nozzle
Increase, flows decrease, enters outer layer filter membrane from venthole；The inner chamber of housing 1 is externally provided with exocoel, and exocoel is socketed with interior cavity gap,
Outer chamber wall is outer layer filter membrane 22, and for receiving the sample gas entered from internal layer filter membrane, sample flow of air direction is from top to bottom, under exocoel
Square set is connected in heating chamber 24, and heating chamber 24 is provided with high-temperature steam entrance 25 and high-temperature steam outlet 26, connects and steams above exocoel
Vapor outlet 27, steam outlet are provided with valve, and the heating chamber of lower section heats below exocoel, avoid vapor etc. from condensing,
Cause vapor and oil gas rise to be separated with dust fractions using heating simultaneously, and adsorbing powder dust is on outer layer filter membrane, vapor
Escaped with oil gas from steam (vapor) outlet, so as to improve the accuracy of the service life of filter membrane and testing result；Outer bottom of chamber is detachable, example
Such as clamping, lower outer bottom of chamber can be gone to be sampled or clean after sampling；Probe tube connects with negative pressure mechanism, for drawing sample gas；Respectively
Valve and housing 1 are made of stainless steel, heat-resisting durable.
The filter membrane 3 is dust filtration bag, and dust absorbing is good, and accuracy of detection is high.
Sample gas import 11 is connected by curved tube with pipeline, realizes the dust sampling of horizontal pipeline, and the scope of application is wider.
Embodiment 2：
The housing 1 is externally provided with vacuum insulation layer, prevents from scalding staff during use.
Remaining is same as Example 1.
Specific operation process is as follows：
Valve II is closed, opens valve I and valve III, adjusts negative pressure mechanism adsorptive pressure and speed, sucks sample gas, sample gas
After internal layer filter membrane adsorption of dust, pressure increases when by sampling nozzle, flows decrease, is partly escaped from probe tube, part
Enter outer layer filter membrane from venthole, open high-temperature steam entrance and high-temperature steam outlet heats to heating chamber, avoid water from steaming
Gas etc. condenses, while using heating vapor and oil gas rising is separated with dust fractions, and adsorbing powder dust is in outer layer filter membrane
On, vapor and oil gas escape from steam (vapor) outlet；After sampling terminates, valve I is closed, valve II is opened and is purged.
Claims (4)
- A kind of 1. powder-dust sampling meter, it is characterised in that：Including housing, the top of housing is sample gas import, and sample gas entrance is provided with Valve I；The import of sample gas is connected by valve II with nitrogen inlet, is communicated by valve I with the inner chamber of housing, housing cavity cavity wall For internal layer filter membrane, internal layer filter membrane is connected with probe tube, and junction is provided with valve III, and probe tube bore is the 1/ of housing cavity bore 3-1/2, the circle of internal layer filter membrane lower section one are uniformly provided with some ventholes；The inner chamber of housing is externally provided with exocoel, exocoel and interior cavity gap Socket, outer chamber wall are outer layer filter membrane, are socketed in below exocoel in heating chamber, heating chamber is provided with high-temperature steam entrance and high-temperature steam Outlet, exocoel top connection steam (vapor) outlet, steam outlet are provided with valve；Probe tube connects with negative pressure mechanism.
- 2. powder-dust sampling meter as claimed in claim 1, it is characterised in that：The housing is externally provided with vacuum insulation layer.
- 3. powder-dust sampling meter as claimed in claim 1, it is characterised in that：The filter membrane is dust filtration bag.
- 4. powder-dust sampling meter as claimed in claim 1, it is characterised in that：The import of sample gas is connected by curved tube with pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721274789.5U CN207215530U (en) | 2017-09-29 | 2017-09-29 | A kind of powder-dust sampling meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721274789.5U CN207215530U (en) | 2017-09-29 | 2017-09-29 | A kind of powder-dust sampling meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207215530U true CN207215530U (en) | 2018-04-10 |
Family
ID=61820215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721274789.5U Expired - Fee Related CN207215530U (en) | 2017-09-29 | 2017-09-29 | A kind of powder-dust sampling meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207215530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521456A (en) * | 2020-06-17 | 2020-08-11 | 河北正态环境检测有限公司 | Sampling method and device suitable for low-concentration particulate matters |
-
2017
- 2017-09-29 CN CN201721274789.5U patent/CN207215530U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521456A (en) * | 2020-06-17 | 2020-08-11 | 河北正态环境检测有限公司 | Sampling method and device suitable for low-concentration particulate matters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180410 Termination date: 20180929 |
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| CF01 | Termination of patent right due to non-payment of annual fee |