CN206095718U - Sampling device suitable for low concentration particulate matter - Google Patents
Sampling device suitable for low concentration particulate matter Download PDFInfo
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- CN206095718U CN206095718U CN201620846317.1U CN201620846317U CN206095718U CN 206095718 U CN206095718 U CN 206095718U CN 201620846317 U CN201620846317 U CN 201620846317U CN 206095718 U CN206095718 U CN 206095718U
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Abstract
The utility model discloses a sampling device suitable for low concentration particulate matter, including two at least sampling channels, each sampling channel all is provided with analysis component and sampling tube subassembly, the sampling tube subassembly is including the sample outer tube and seal the sample inner tube in it to the sample inner tube includes the first pipe and the second pipe of following the axial disconnection, and first pipe and second pipe disalignment, and the outer tip of second pipe extends sample outer tube outside and forms the sample import, and the outer tip of first pipe extends the outside of sample outer tube, when the flow passageway is many, can utilize low flow to sample, reduce the filter membrane or strain the filtration velocity of a section of thick bamboo, improve its filtration efficiency, the draft that the filter membrane receives is alleviated to the less resistance that can reduce the sampling device of flow, greatly reduced the filter membrane taken out brokenly phenomenon emergence probability, the utility model provides an inner tube of sampling tube subassembly includes the first pipe and the second pipe of disalignment, can avoid the comdenstion water sampling of falling suction elbow portion like this, pollutes the filter membrane, guarantees the accuracy of test result.
Description
Technical field
The utility model is related to dedusting technology field, more particularly to a kind of sampling apparatus suitable for low concentrations of particulates thing.
Background technology
With frequently occurring for sandstorm and haze weather, air pollution problems inherent is increasingly paid close attention to by people.Air
The detection of quality is also particularly important, is monitored for the particulate matter in air, analyzes and research is current environment protection work
Emphasis.
At this stage particle monitoring method includes following several method for China:
First, whole section gridding method is layouted, and using glass fiber filter cylinder constant speed flue dust is collected, and filter is taken out after the completion of sampling
Cylinder carries out drying and weighs, and calculates particle concentration.The method is only applicable to particle concentration higher than 50mg/m3Fixed-contamination
Source, determines particle concentration and is less than 50mg/m3Time error is larger.
Also, when being sampled using gridding method, need to change multiple gaging holes in sampling process once, due to being in flue
Negative pressure, during sampling gun takes out, is easily caused the condensed water suck-back in the leather hose of filter cylinder rear portion to filter cylinder outer surface, causes
Pollution, while repeatedly passing in and out thieff hatch back and forth, also increases the rebuffed probability of sampling mouth, affects the accuracy of test result.
Second, using big flow sampling increased in the case where the sampling time is not increased using the big flow method of sampling
The gas flow of sampling, although improve the quality of filter membrane or filter cylinder trap particulate matter to a certain extent, reduces its weightless
Possibility, but in the case of humidity height, big flow sampling is easily caused filter cylinder or filter membrane is taken out brokenly, while straight using filter membrane
In the case that footpath is little, flow it is excessive, improve the transition wind speed of filter membrane, reduce its filter efficiency, and equipment is when longer
Between high capacity work under, spoilage also increases.
Therefore, how to provide it is a kind of be applied to low concentrations of particulates thing, and solve sampling process filter cylinder or filter membrane takes out brokenly skill
Art problem, is those skilled in that art's technical problem urgently to be resolved hurrily.
Utility model content
To solve above-mentioned technical problem, the utility model provides a kind of sampling apparatus suitable for low concentrations of particulates thing, bag
At least two sampling channels are included, each sampling channel is provided with analytic unit and sampling tube assembly；The sampling tube assembly
The sampling inner tube being sleeved on including sampling outer tube and sealing in it, and the sampling inner tube is including the first pipe for disconnecting vertically
And second pipe, and the first pipe and the second pipe be not coaxial, and the outer end of the second pipe extends the sampling outer tube
Outside forms sampling import, and the outer end of the first pipe extends the outside of the sampling outer tube.
Optionally, the first pipe includes the first straight length, the second straight length and is connected to oblique between two straight lengths
Pipeline section；Second straight length be located at it is described sampling outer tube axis, first straight length recline it is described sampling outer tube inwall, and
Its external port connects the sampling channel.
Optionally, the second pipe includes the 3rd straight length, the 4th straight length and is connected to oblique between two straight lengths
Pipeline section；3rd straight length is located at the axis of the sampling outer tube, and the external port of the 3rd straight length is sampling import；Described
Four straight lengths recline it is described sampling outer tube inwall.
Optionally, each sampling channel is also provided with flow pump, and the flow pump is low discharge pump, and its flow is 0
～15L/min.
Optionally, also including integrated sampling part, it includes sample elbow, filter element and limiting component, described to adopt
The front end of sample elbow is thief hatch, and the filter element is positioned at the rearward end of the sampling elbow by the limiting component,
And the rearward end connects the sampling import of the second pipe.
Optionally, the limiting component is sealed aluminum circle, and the rearward end of the sampling elbow forms outwardly taper
Cavity, the filter element is by sealed aluminum delineation positioned at the inside of the cone-shaped cavity.
Optionally, the filter element includes filter membrane and stainless steel support net, and the filter membrane and the stainless steel support net are along axle
To being sequentially arranged and by the sealed aluminum circle and circumferential cone-shaped cavity sealing.
Optionally, the projecting end of the second pipe is provided with nut, and the cone-shaped cavity is screwed onto inside the nut,
And both circumferential seals.
Optionally, also including Pitot tube, the nut is run through in the end of the Pitot tube insertion flue.
Optionally, the analytic unit is included wherein one in flow quantity recorder, pressure gauge, thermometer and flow regulating part
Person or a few persons.
Compared with single channel in prior art, sampling apparatus presented herein includes that two or more samplings are logical
Road, realizes the collection of equal flow in same time, and traffic channel herein is relatively more, it is possible to use low discharge is adopted
Sample, can so reduce the filtration velocity of filter membrane or filter cylinder, improve its filter efficiency.Sample in high humidity low temperature flue simultaneously
When, the less resistance that can reduce sampling apparatus of flow alleviates the draft suffered by filter membrane, greatly reduces filter membrane and is taken out brokenly phenomenon
Probability of happening.Also, multichannel is acquired respectively by corresponding sampling tube assembly to flue, so can be realized multiple simultaneously
The sampling of thieff hatch, accurately dust concentration in reaction a period of time inner flue, reduces the whole-sample time, while also meeting
The sampling of surface grids method is resolved, the number of times that sampling gun passes in and out flue is reduced, the probability be rebuffed with suck-back is reduced, it is ensured that test
Accuracy.
Meanwhile, the inner tube of the sampling tube assembly in this sampling apparatus includes out-of-alignment first pipe and second pipe, i.e., first
Pipe and second pipe arranged in dislocation, during sampling, the condensed water of accumulation is flowed down along the inner end of the second inner tube, because of first pipe and second pipe
Disconnect and not coaxial, condensed water may not flow into the inside of first pipe, and be stored in being located at taking between first pipe and second pipe
The condensed water storage inner tube segment of sample outer tube, releases after the completion of sampling.Can so avoid the condensed water sampling of falling suction curved
Head, pollutes filter membrane, it is ensured that the accuracy of test result.
From the action principle of sampling apparatus described above, the structure setting that inner tube is sampled in the utility model can be with
Condensate return is avoided, without the need for heat tracing sampling.Certainly, without the need for heat tracing sampling also just without the need for increase in sampling apparatus heating tube,
Plus the associated components such as electric heating cable, so as to simplify structure, it is even more important that without the need for the electricity consumption in wet environment, largely
On improve processing safety and convenience.
Description of the drawings
Fig. 1 is the structural representation of the sampling apparatus for being applied to low concentrations of particulates thing in a kind of embodiment of the utility model；
Fig. 2 is the structural representation for sampling tube assembly；
The exploded perspective view of the integrated sample units of Fig. 3.
Wherein, in Fig. 1 to Fig. 3：
First sampling channel 10,
Second sampling channel 20,
3rd sampling channel 30,
Integrated sampling part 1, elbow 1-1, filter membrane 1-2, support net 1-3, sealed aluminum circle 1-4,
Pressure gauge 2, flow quantity recorder 3, suspended body flowmeter 4, thermometer 5, flow regulating part 6, Pitot tube 7, probe tube
Component 8, sampling outer tube 81, first pipe 82, the first straight length 821, inclined tube section 822, the second straight length 823, second pipe the 83, the 3rd
Straight length 831, inclined tube section 832, the 4th straight length 833, nut 9, flow pump 11.
Specific embodiment
In order that those skilled in the art more fully understands the technical solution of the utility model, below in conjunction with the accompanying drawings and tool
The utility model is described in further detail for body embodiment.
Fig. 1 is refer to, Fig. 1 is the knot of the sampling apparatus for being applied to low concentrations of particulates thing in a kind of embodiment of the utility model
Structure schematic diagram.
The utility model provides a kind of sampling apparatus suitable for low concentrations of particulates thing, including at least two samplings are led to
Road, shows the sampling apparatus with three sampling channels in Fig. 1, sampling channel is specially：First sampling channel 10, second are adopted
The sampling channel 30 of sample passage 20 and the 3rd.Each sampling channel is provided with analytic unit and sampling tube assembly 8, in each sampling channel
The main building block of analytic unit can be with identical, it is also possible to it is different.
Continue to introduce technical scheme so that building block in the analytic unit arranged in each sampling channel is identical as an example herein.Point
Analysis component can be included wherein one in flow quantity recorder 3, pressure gauge 2, thermometer 5, suspended body flowmeter 4 and flow regulating part 6
The acting as of person or a few persons, wherein flow quantity recorder 3 records the total gas flow rate for flowing through the sampling channel；The work of pressure gauge 2
With the gas pressure for detecting tested particulate matter, the gas temperature of the tested particulate matter of effect detection of thermometer 5；Flow regulating part
6 act as adjusts the gas flow for flowing through sampling channel.Flowing through the aerodynamic force of sampling channel can be carried by flow pump 11
For the constant low discharge pump 11 of the preferred flow of flow pump 11 herein, the general flow of low discharge pump 11 is less than 15L/min.
Sampling apparatus herein also includes sampling tube assembly 8, and sampling tube assembly 8 is included in sampling outer tube 81 and sampling
Pipe, samples the inside that inner tube sealing is sleeved on sampling outer tube 81, and sampling inner tube specifically includes the He of first pipe 82 for disconnecting vertically
Second pipe 83, first pipe 82 and second pipe 83 be not coaxial, and the outer end of second pipe 83 extends the outside of sampling outer tube 81 and forms sampling
Import, the outer end of first pipe 82 extends the corresponding sampling channel of ft connection of sampling outer tube 81, described sampling channel at this
Refer to the pipeline connected with sampling analysis instrument etc..
Compared with single channel in prior art, sampling apparatus presented herein includes that two or more samplings are logical
Road, realizes the collection of equal flow in same time, and traffic channel herein is relatively more, it is possible to use low discharge is adopted
Sample, can so reduce the filtration velocity of filter membrane 1-2 or filter cylinder, improve its filter efficiency.Adopt in high humidity low temperature flue simultaneously
During sample, the less resistance that can reduce sampling apparatus of flow alleviates the draft suffered by filter membrane 1-2, greatly reduces filter membrane and is taken out
Broken phenomenon probability of happening.Also, multichannel is acquired respectively by corresponding sampling tube assembly 8 to flue, so can be simultaneously
The sampling of multiple thieff hatch is realized, accurately dust concentration in reaction a period of time inner flue, reduces the whole-sample time, together
When also meet section gridding method sampling, reduce sampling gun pass in and out flue number of times, reduce be rebuffed and suck-back probability, protect
The accuracy of test is demonstrate,proved.
Meanwhile, the inner tube of the sampling tube assembly 8 in this sampling apparatus includes out-of-alignment first pipe 82 and second pipe 83, i.e.,
First pipe 82 and the arranged in dislocation of second pipe 83, during sampling, the condensed water of accumulation is flowed down along the inner end of the second inner tube, because of first pipe
82 and second pipe 83 disconnect and coaxial, condensed water may not flow into the inside of first pipe 82, and be stored in being located at first pipe 82
The condensed water storage inner tube segment of the sampling outer tube 81 and second pipe 83 between, releases after the completion of sampling.So can keep away
Exempt from the condensed water sampling of falling suction heel, pollute filter membrane 1-2, it is ensured that the accuracy of test result.
From the action principle of sampling apparatus described above, the structure setting that inner tube is sampled in the utility model can be with
Condensate return is avoided, without the need for heat tracing sampling.Certainly, without the need for heat tracing sampling also just without the need for increase in sampling apparatus heating tube,
Plus the associated components such as electric heating cable, so as to simplify structure, it is even more important that without the need for the electricity consumption in wet environment, largely
On improve processing safety and convenience.
The structure of first pipe 82 and second pipe 83 can be following present a kind of specific by various structures in sampling inner tube
Structure.
Fig. 2 is refer to, Fig. 2 is the structural representation for sampling tube assembly 8.
In a kind of specific embodiment, first pipe 82 can include the first straight length 821, the second straight length 823 and
The inclined tube section 822 being connected between two straight lengths；Second straight length 823 is located at the axis of sampling outer tube, and the first straight length 821 is pasted
Inwall by sampling outer tube 81, and its external port connection sampling channel.Wherein inclined tube section 822 can be straight tube-like structure, so
Flue gas is conducive to pass through first pipe 82.
In the same manner, the shape of second pipe 83 can be similar with first pipe 82.Second pipe 83 can include the 3rd straight length
831st, the 4th straight length 833 and the inclined tube section 832 that is connected between two straight lengths；3rd straight length 831 is located at sampling outer tube
Axis, the external port of the 3rd straight length 831 is sampling import；4th straight length 833 reclines and samples the inwall of outer tube 81.
The structure of first pipe 82 and second pipe 83 both can play a part of to prevent condensate return, be conducive to flue gas suitable again
Profit is by first pipe 82 and second pipe 83.
The specific embodiment that inner tube is including two sections is illustrate only herein, it will be understood by those skilled in the art that sampling
Inner tube can also be further segmented, i.e., first pipe 82 or second pipe 83 can be further separated into two sections, three sections and more
Section, dislocation arrangement between adjacent each section.
Please further refer to Fig. 3, the exploded perspective view of the integrated sample units 1 of Fig. 3.
Sampling apparatus in the various embodiments described above can further include integrated sampling part 1, and it includes that sampling is curved
Head, filter element and limiting component.The front end of sampling elbow is thief hatch, inside the hole arranged in thief hatch insertion flue, mistake
Filter part is positioned at the rearward end of sampling elbow by limiting component, and the rearward end connects the sampling import of second pipe 83.
The leading section of sampling elbow can be elbow structure, that is to say, that sampling elbow includes elbow 1-1 and connects the straight of elbow 1-1
Pipeline section.
It should be noted that above-mentioned front end, rear end are defined according to flow of flue gas direction, gas approach is front end, cigarette
Gas outlet is rear end.
Sampling elbow is integrated into a whole with filter element herein, is sampled and is weighed, reduce dust in sampling
The loss that elbow front end is sticked, and the loss of film in membrane process is individually taken, substantially increase the accuracy of test.
Specifically, limiting component is sealed aluminum circle 1-4, and the rearward end of elbow of sampling forms outwardly cone-shaped cavity,
Filter element is positioned at the inside of cone-shaped cavity by the sealed aluminum circle 1-4.Filter element can include filter membrane 1-2 and stainless
Steel support net 1-3, filter membrane 1-2 and stainless steel support net 1-3 are sequentially arranged vertically and by sealed aluminum circle 1-4 and circumferential conical cavity
Body is sealed.
Sampling inner tube can be attached in the following manner with integrated sampling part 1.
In a kind of specific embodiment, the projecting end of second pipe 83 can be provided with nut 9, the cone-shaped cavity
It is screwed onto inside nut 9, and both circumferential seals.
Sampling apparatus can generally include Pitot tube 7, and nut 9 is run through in the end of the insertion flue of Pitot tube herein 7.Also
It is to say, Pitot tube 7 is stretched into inside flue after nut 9, and such nut 9 can play good supporting role to Pitot tube 7.
Above detailed Jie is carried out to a kind of sampling apparatus suitable for low concentrations of particulates thing provided by the utility model
Continue.Specific case used herein is set forth to principle of the present utility model and embodiment, and above example is said
It is bright to be only intended to help and understand method of the present utility model and its core concept.It should be pointed out that common for the art
For technical staff, on the premise of without departing from the utility model principle, the utility model can also be carried out it is some improvement and
Modification, these are improved and modification is also fallen in the utility model scope of the claims.
Claims (10)
1. a kind of sampling apparatus suitable for low concentrations of particulates thing, it is characterised in that including at least two sampling channels, it is each described
Sampling channel is provided with analytic unit and sampling tube assembly (8)；Sampling tube assembly (8) is including sampling outer tube (81) and close
The sampling inner tube being enclosed in it, and the sampling inner tube is including the first pipe (82) and second pipe (83) for disconnecting vertically, and
And the first pipe (82) and the second pipe (83) be not coaxial, the outer end of the second pipe (83) extends the sampling outer tube
(81) outside to form sampling import, the outer end of the first pipe (82) extends the outside of sampling outer tube (81).
2. sampling apparatus as claimed in claim 1, it is characterised in that the first pipe (82) including the first straight length (821),
Second straight length (823) and the inclined tube section (822) being connected between two straight lengths；Second straight length (822) takes positioned at described
The axis of sample outer tube, first straight length (821) reclines the inwall of sampling outer tube (81), and the connection of its external port is described
Sampling channel.
3. sampling apparatus as claimed in claim 2, it is characterised in that the second pipe (83) including the 3rd straight length (831),
4th straight length (833) and the inclined tube section (832) being connected between two straight lengths；3rd straight length (831) takes positioned at described
The axis of sample outer tube (81), the external port of the 3rd straight length is sampling import；4th straight length reclines the sampling
The inwall of outer tube (81).
4. sampling apparatus as claimed in claim 1, it is characterised in that each sampling channel is also provided with flow pump
(11), the flow pump (11) is low discharge pump, and its flow is 0～15L/min.
5. the sampling apparatus as described in any one of Claims 1-4, it is characterised in that also including integrated sampling part (1),
It includes sample elbow, filter element and limiting component, and the front end of the sampling elbow is thief hatch, and the filter element passes through
The limiting component is positioned at the rearward end of the sampling elbow, and the sampling of rearward end connection second pipe (83) is entered
Mouthful.
6. sampling apparatus as claimed in claim 5, it is characterised in that the limiting component is sealed aluminum circle (1-4), described to adopt
The rearward end of sample elbow forms outwardly cone-shaped cavity, and the filter element is positioned at by the sealed aluminum circle (1-4)
The inside of the cone-shaped cavity.
7. sampling apparatus as claimed in claim 6, it is characterised in that the filter element includes filter membrane (1-2) and stainless steel
Support net (1-3), the filter membrane (1-2) and the stainless steel support net (1-3) are sequentially arranged vertically and pass through the sealed aluminum
Circle (1-4) and the cone-shaped cavity circumferential seal.
8. sampling apparatus as claimed in claim 6, it is characterised in that the projecting end of the second pipe (83) is provided with nut
(9), the cone-shaped cavity is screwed onto the nut (9) inside, and both circumferential seals.
9. sampling apparatus as claimed in claim 8, it is characterised in that also including Pitot tube (7), Pitot tube (7) insertion
The nut (9) is run through in the end of flue.
10. sampling apparatus as claimed in claim 1, it is characterised in that the analytic unit includes flow quantity recorder, pressure
One of which or a few persons in table, thermometer and flow regulating part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620846317.1U CN206095718U (en) | 2016-08-05 | 2016-08-05 | Sampling device suitable for low concentration particulate matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620846317.1U CN206095718U (en) | 2016-08-05 | 2016-08-05 | Sampling device suitable for low concentration particulate matter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206095718U true CN206095718U (en) | 2017-04-12 |
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ID=58466835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620846317.1U Active CN206095718U (en) | 2016-08-05 | 2016-08-05 | Sampling device suitable for low concentration particulate matter |
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| Country | Link |
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| CN (1) | CN206095718U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405867A (en) * | 2021-07-26 | 2021-09-17 | 天津环科环境规划科技发展有限公司 | Particulate matter sampling device and particulate matter detection device |
| CN113640073A (en) * | 2021-08-12 | 2021-11-12 | 北京纳颗环境科技有限公司 | Multichannel micro-flow sampling controller |
-
2016
- 2016-08-05 CN CN201620846317.1U patent/CN206095718U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405867A (en) * | 2021-07-26 | 2021-09-17 | 天津环科环境规划科技发展有限公司 | Particulate matter sampling device and particulate matter detection device |
| CN113640073A (en) * | 2021-08-12 | 2021-11-12 | 北京纳颗环境科技有限公司 | Multichannel micro-flow sampling controller |
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