CN209485798U - A kind of taper single tube mouth sampling system with second level shielding case - Google Patents
A kind of taper single tube mouth sampling system with second level shielding case Download PDFInfo
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- CN209485798U CN209485798U CN201920091373.2U CN201920091373U CN209485798U CN 209485798 U CN209485798 U CN 209485798U CN 201920091373 U CN201920091373 U CN 201920091373U CN 209485798 U CN209485798 U CN 209485798U
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Abstract
The taper single tube mouth sampling system with second level shielding case that the utility model relates to a kind of, it is characterized in that: including level-one shielding case, the level-one shielding case is in infundibulate, funnel end is provided with the second level shielding case being fixed with one, second level shielding case inside end is fixedly connected with ozzle, ozzle end is connected with pipeline, and pipe end is connect with external exhaust gas emission monitoring device；The second level shielding case is circular tube structure, and the connection type with ozzle is Along ent contact connectio, is provided with airflow channel between the two；The ozzle is made of nozzle and pipe shaft, and nozzle is the circular cone structure of tubulose.The beneficial effects of the utility model are: overall structure is simple, it can be uniformly mixed arda sampling in Airborne Effluent, sampling result is more accurate and effective compared to multi-nozzle sampling system.
Description
Technical field
The utility model relates to the acquisitions and monitoring of pollution sources in exhaust gas discharge process, especially a kind of to have two cascade screens
The taper single tube mouth sampling system of cover.
Background technique
To distinguish, whether every pollution sources meet emission limit requirement in industrial discharged waste gas, it usually needs to chimney or row
The Airborne Effluent in pipeline is put to run continuous samples and monitor.Many sampling line systems are all made of multi-nozzle sampling at present,
Multi-nozzle sampling plan its disadvantage is clearly: being 1. sampled in non-mixed uniform sampling region, sampling result does not have
It is representative；2. multi-nozzle sampling system is since horizontal tube is more with bend pipe, and structure is complicated, easily causes Airborne Effluent pipeline
Loss, so as to cause sampling serious distortion.It is simple and have both efficient sampling system therefore, it is necessary to design a kind of structure, to solve
Certainly this problem.
Summary of the invention
The purpose of this utility model is to propose a kind of taper single tube mouth sampling system with second level shielding case, by this reality
With novel, Airborne Effluent sampling efficiency can be improved, to simplify the system structure of sampling line, so that sampling result is more quasi-
Really, effectively.
The utility model uses a kind of following technical scheme: taper single tube mouth sampling system with second level shielding case,
Be characterized in: including level-one shielding case, the level-one shielding case is in infundibulate, and funnel end is provided with the second level being fixed with one
Shielding case, second level shielding case inside end are fixedly connected with ozzle, and ozzle end is connected with pipeline, pipe end and external exhaust gas
The connection of emission monitoring device；The second level shielding case is circular tube structure, and the connection type with ozzle is equal part point contact company
It connects, is provided with airflow channel between the two；The ozzle is made of nozzle and pipe shaft, and nozzle is the circular cone structure of tubulose,
End is provided with external screw thread, and the angle of internal wall of pipe orifice face and central axis isα,3°≤α≤5°,Nozzle outside wall surface and central axis
Angle be less than or equal to 12 °, pipe shaft is circular tube structure, and one end is provided with the internal screw thread matched with nozzle external screw thread, the other end
It is connect with pipeline.
Its inner wall surface roughness of the level-one shielding case is Ra0.8, and makees antistatic, antirust treatment, section face
Product is the 8%~12% of monitored discharge tube area of section.
Its inner wall surface roughness of the second level shielding case is Ra0.8, and makees antistatic, antirust treatment, central shaft
Line is overlapped with the central axis of level-one shielding case.
The ozzle central axis is overlapped with the central axis of second level shielding case, and inside and outside wall surface roughness is
Ra0.8, and make antistatic, antirust treatment.
The inner wall of the pipe surface roughness is Ra0.8, and makees antistatic, antirust treatment.
The beneficial effects of the utility model are: overall structure is simple, it can be uniformly mixed arda sampling in Airborne Effluent,
It is effective to be promoted using the conical nozzle after special second level shielding case and optimized design by the combination of two-stage shielding case
Transmitance of the sampling nozzle to particulate reduces the wall surface loss of Airborne Effluent, can be right under high turbulent flow condition
Particulate keeps high transmittance, and sampling nozzle is allowed to be sampled in the case where high turbulence intensity, therefore, sampling result
It is more accurate and effective compared to multi-nozzle sampling system.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the second level shielding case of the utility model and the connection main view of ozzle.
Fig. 3 is the second level shielding case of the utility model and the connection top view of ozzle.
Fig. 4 is the main view of nozzle.
In figure, 1, level-one shielding case, 2, second level shielding case, 3, ozzle, 4, pipeline, 5, monitoring device, 6, nozzle, 7, pipe
Body, 8, tie point.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings of the specification.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of taper single tube mouth sampling system with second level shielding case, feature
Be: including level-one shielding case 1, the level-one shielding case 1 is in infundibulate, and funnel end is provided with the second level screen being fixed with one
Cover cover 2,2 inside end of second level shielding case is fixedly connected with ozzle 3, and 3 end thread of ozzle is connected with pipeline 4, pipe end with
External exhaust gas emission monitoring device 5 is threadedly coupled；The second level shielding case 2 is circular tube structure, the connection type with ozzle 3
For three 8 welded type of tie point connections of equal part, it is provided with airflow channel 9 between the two；The ozzle is by nozzle 6 and pipe shaft 7
It constitutes, nozzle 6 is the circular cone structure of tubulose, and end is provided with external screw thread, and the angle of 6 inner wall of nozzle and central axis isα,
3°≤α≤5°,The angle of 6 outside wall surface of nozzle and central axis is less than or equal to 12 °, and the size of the two angles will have a direct impact on pipe
The inhalation rate of 3 pairs of mouth sampling air-flows is calculated by flow fieldoptimization it is found that the sucking of 3 pairs of ozzle sampling air-flows is imitated under this numerical value
Rate can satisfy engineer application needs, and effect is the inhalation rate for improving 3 pairs of ozzle sampling air-flows, to promote entire sample train
The transmitance of system, pipe shaft 7 are circular tube structure, and one end is provided with the internal screw thread matched with 6 external screw thread of nozzle, the other end and pipeline
4 connections.
Its inner wall surface roughness of the level-one shielding case 1 is Ra0.8, and makees antistatic, antirust treatment, section face
Product is the 8%~12% of monitored discharge tube area of section.Its principle is: particulate can be generated with pipeline inner wall and directly be connect
Touching, if pipeline inner wall surface roughness is excessively high, surface gully interval is excessive, will cause particulate and is deposited in these gullies
Face, to reduce particulate transmitance；If inner wall static electrification, electrostatic effect can be such that particulate is adsorbed on inner wall,
To reduce particulate transmitance；If inner wall gets rusty, the surface roughness of rusty part no longer meets Ra0.8, can make gas
Sol particles flow through rusty part therewith random collision when, cause to deposit, reduce transmitance.
Its inner wall surface roughness of the second level shielding case 2 is Ra0.8, and makees antistatic, antirust treatment, central shaft
Line is overlapped with the central axis of level-one shielding case 1.
3 central axis of ozzle is overlapped with the central axis of second level shielding case 2, and inside and outside wall surface roughness is equal
For Ra0.8, and make antistatic, antirust treatment.
The 4 inner wall surface roughness of pipeline is Ra0.8, and makees antistatic, antirust treatment.
The principles of the present invention are: level-one shielding case entrance is arranged in the well-mixed region of Airborne Effluent, to quilt
It samples air-flow and carries out pre-separation, obtain first order center stream, center stream remixes in shielding case, and is delivered to second level shielding case
Place.Nozzle set constitutes single-stage shielding case sampling nozzle structure in second level shielding case, to the resulting first order center of pre-separation
Stream is separated again, is collected into second level center stream, to reach the loss for reducing particulate, promotes the purpose of transmitance.
By two-stage shield combination, achieve the effect that pre-separation-separates again.
The wall surface loss of Airborne Effluent can be effectively reduced, by the cone of optimization design in the setting of I and II shielding case
Shape nozzle can keep high transmittance to particulate under high turbulent flow condition, so that ozzle is to sampling gas when sampling
The suction efficiency of stream can satisfy engineer application needs.
The non-detailed portion of the utility model is the prior art.
Claims (5)
1. a kind of taper single tube mouth sampling system with second level shielding case, it is characterized in that: including level-one shielding case, described one
Cascade screen cover is in infundibulate, and funnel end is provided with the second level shielding case being fixed with one, and second level shielding case inside end is fixed
It is connected with ozzle, ozzle end is connected with pipeline, and pipe end is connect with external exhaust gas emission monitoring device；The second level screen
Covering cover is circular tube structure, and the connection type with ozzle is Along ent contact connectio, is provided with airflow channel between the two；It is described
Ozzle be made of nozzle and pipe shaft, nozzle is the circular cone structure of tubulose, and end is provided with external screw thread, and internal wall of pipe orifice face is in
The angle of mandrel line isα,3°≤α≤5°,The angle of nozzle outside wall surface and central axis is less than or equal to 12 °, and pipe shaft is round tube knot
Structure, one end are provided with the internal screw thread matched with nozzle external screw thread, and the other end is connect with pipeline.
2. a kind of taper single tube mouth sampling system with second level shielding case according to claim 1, it is characterized in that: described
Its inner wall surface roughness of level-one shielding case be Ra0.8, and make antistatic, antirust treatment, area of section is monitored row
Put the 8%~12% of pipeline section area.
3. a kind of taper single tube mouth sampling system with second level shielding case according to claim 1, it is characterized in that: described
Its inner wall surface roughness of second level shielding case be Ra0.8, and make antistatic, antirust treatment, center axis thereof and a cascade screen
The central axis of cover is overlapped.
4. a kind of taper single tube mouth sampling system with second level shielding case according to claim 1, it is characterized in that: described
Ozzle central axis be overlapped with the central axis of second level shielding case, inside and outside wall surface roughness is Ra0.8, and is prevented
Electrostatic, antirust treatment.
5. a kind of taper single tube mouth sampling system with second level shielding case according to claim 1, it is characterized in that: described
Inner wall of the pipe surface roughness be Ra0.8, and make antistatic, antirust treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920091373.2U CN209485798U (en) | 2019-01-21 | 2019-01-21 | A kind of taper single tube mouth sampling system with second level shielding case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920091373.2U CN209485798U (en) | 2019-01-21 | 2019-01-21 | A kind of taper single tube mouth sampling system with second level shielding case |
Publications (1)
| Publication Number | Publication Date |
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| CN209485798U true CN209485798U (en) | 2019-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920091373.2U Active CN209485798U (en) | 2019-01-21 | 2019-01-21 | A kind of taper single tube mouth sampling system with second level shielding case |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470532A (en) * | 2019-01-21 | 2019-03-15 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | A kind of taper single tube mouth sampling system with second level shielding case |
| CN112763279A (en) * | 2020-12-21 | 2021-05-07 | 苏州原核仪表成套有限公司 | Sampling head structure, air pipe structure, sampling head and air pipe type selection method |
-
2019
- 2019-01-21 CN CN201920091373.2U patent/CN209485798U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470532A (en) * | 2019-01-21 | 2019-03-15 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | A kind of taper single tube mouth sampling system with second level shielding case |
| CN112763279A (en) * | 2020-12-21 | 2021-05-07 | 苏州原核仪表成套有限公司 | Sampling head structure, air pipe structure, sampling head and air pipe type selection method |
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