CN106018014A - High precision dilution sampling instrument - Google Patents
High precision dilution sampling instrument Download PDFInfo
- Publication number
- CN106018014A CN106018014A CN201610627314.3A CN201610627314A CN106018014A CN 106018014 A CN106018014 A CN 106018014A CN 201610627314 A CN201610627314 A CN 201610627314A CN 106018014 A CN106018014 A CN 106018014A
- Authority
- CN
- China
- Prior art keywords
- mass flow
- valve
- high accuracy
- flow controller
- sample gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
- G05D7/0641—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means
- G05D7/0647—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means the plurality of throttling means being arranged in series
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Automation & Control Theory (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a high precision dilution sampling instrument. A sampling probe is connected to a sample gas inlet, a calibration gas inlet is connected to a second one-way valve, the sample gas inlet is converged with the second one-way valve through a pipeline and is then connected to a first filter, then the first filter falls into two paths, one path is connected to a vacuum pump and a sample gas emptying port in order, and the other path is connected to a proportional valve, a second high precision mass flow controller and a Venturi tube in order, and the second high precision mass flow controller is also connected to a first high precision mass flow controller with different measuring range, a diluent gas inlet falls into two paths, one path is connected to a first pressure regulating valve and a first electromagnetic valve in order, and is then connected to one point on the pipeline between the proportional valve and the first filter, and the other path is connected to a second pressure regulating valve, a second filter and a second electromagnetic valve.
Description
Technical field
The present invention relates to a kind of gas sampling apparatus technical field, particularly relate to a kind of high accuracy dilution sampling instrument.
Background technology
In recent years, China's atmospheric pollution is on the rise, and has become as the major issue faced by people, in polluter
Foul gas is the important pollutant can not ignore, and the health for people causes serious threat, therefore to stench
The emission monitoring of gas becomes a kind of necessary technology means.The foul gas concentration of general discharge is the highest, directly supervises
Survey difficulty, it is necessary to gas dilution before sampling.But, general dilution sampling instrument dilution ratio single or
Precision is inadequate.It is thus desirable to prior art is made improvement.
Summary of the invention
Present invention seek to address that the deficiencies in the prior art, and a kind of high accuracy dilution sampling instrument is provided.
The present invention for achieving the above object, by the following technical solutions:
Described a kind of high accuracy dilution sampling instrument, including sampling probe, sample gas inlet, calibration gas entrance, mixes
Close gas exit, gaseous mixture evacuation port, vacuum pump, sample gas evacuation port, carrier gas entrance, it is characterised in that
Also including the second check valve, controller, sampling probe is connected with sample gas inlet, calibration gas entrance and the second list
Connecting to valve, sample gas inlet and the second check valve are connected after being collected by pipeline the first filter, the first mistake
Being divided into two-way after filter, a road is sequentially connected with vacuum pump, sample gas evacuation port, and another road is sequentially connected with proportional
Valve, the second high accuracy mass flow controller, Venturi tube, the second high accuracy mass flow controller is the most in parallel
There is a first high accuracy mass flow controller different from its range, be divided into two-way after carrier gas entrance, a road
It is connected with the first pressure regulator valve, the first electromagnetic valve in turn, on the pipeline subsequently and between proportioning valve, the first filter one
Point connects, and another road is connected with the second pressure regulator valve, the second filter, the second electromagnetic valve in turn, subsequently by second
Electromagnetic valve is divided into again two-way, and a road connects the first mass flow controller, is connected with Venturi tube subsequently, separately
One tunnel is connected with the second mass flow controller, the first check valve in turn, Venturi tube, the going out of the first check valve
Mouth collect by pipeline after connection have blender, blender be divided into again two-way respectively with gaseous mixture exit, mix
Gas evacuation port connect, gaseous mixture exit connect have analytical tool, the second electromagnetic valve, the first electromagnetic valve, second
Mass flow controller, the first mass flow controller, sampling probe, vacuum pump, proportioning valve, first high-precision
Degree mass flow controller, the second high accuracy mass flow controller are connected with controller respectively.
Sampling probe is provided with coarse filtration net.
It is additionally provided with emission-control equipment after gaseous mixture evacuation port, sample gas evacuation port.
The invention has the beneficial effects as follows: adoption rate valve of the present invention and in parallel two high accuracy mass flows control
Device can accurately regulate sample gas, uses mass flow controller to control carrier gas flow, so that dilution ratio can
Adjust；Owing to high accuracy mass flow controller has temperature compensation function, use two parallel connections and range different
Mass flow controller in high precision, compared with the mode of capillary tube and differential pressure transmitter parallel connection, flow is not by flue gas
Temperature affects, and is greatly improved carrier gas flow control accuracy.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is that the present invention ties control system schematic diagram.
In figure: 1-gaseous mixture exit；2-gaseous mixture evacuation port；3-blender；4-the first check valve；5-
Two mass flow controllers；6-the second electromagnetic valve；7-the second filter；8-the second pressure regulator valve；9-first is high-precision
Degree mass flow controller；10-the second high accuracy mass flow controller；11-the first mass flow controller；
12-Venturi tube；13-sampling probe；14-sample gas inlet；15-calibrates gas entrance；16-the second check valve；
17-the first pressure regulator valve；18-carrier gas entrance；19-sample gas evacuation port；20-vacuum pump；21-proportioning valve；22-
First electromagnetic valve；23-the first filter；24-controller.
It is described in detail referring to the drawings below with reference to embodiments of the invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
As depicted in figs. 1 and 2, a kind of high accuracy dilution sampling instrument, enter including sampling probe 13, sample gas
Mouth 14, calibration gas entrance 15, gaseous mixture exit 1, gaseous mixture evacuation port 2, vacuum pump 20, sample gas
Evacuation port 19, carrier gas entrance 18, it is characterised in that also include the second check valve 16, controller 24, adopt
Sample probe 13 is connected with sample gas inlet 14, and calibration gas entrance 15 is connected with the second check valve 16, sample gas
Entrance 14 is connected after being collected by pipeline with the second check valve 16 the first filter 23, the first filter 23
After be divided into two-way, a road is sequentially connected with vacuum pump 20, sample gas evacuation port 19, and another road is connected with ratio in turn
Example valve the 21, second high accuracy mass flow controller 10, Venturi tube 12, the second high accuracy mass flow control
Device 10 processed is also parallel with a first high accuracy mass flow controller 9 different from its range, carrier gas entrance
Being divided into two-way after 18, a road is connected with first pressure regulator valve the 17, first electromagnetic valve 22 in turn, subsequently with proportioning valve
21, a little connect on the pipeline between the first filter 23, another road be connected with in turn the second pressure regulator valve 8, the
Tow filtrator the 7, second electromagnetic valve 6, is divided into again two-way by the second electromagnetic valve 6 subsequently, and a road connects first
Mass flow controller 11, is connected with Venturi tube 12 subsequently, and another road is connected with the second mass flow in turn
Controller the 5, first check valve 4, the outlet of Venturi tube the 12, first check valve 4 is connected after being collected by pipeline
Being connected to blender 3, blender 3 is divided into again two-way respectively with gaseous mixture exit 1, gaseous mixture evacuation port 2 even
Connecing, gaseous mixture exit 1 connects analytical tool, second electromagnetic valve the 6, first electromagnetic valve the 22, second mass
Flow controller the 5, first mass flow controller 11, sampling probe 13, vacuum pump 20, proportioning valve 21,
First high accuracy mass flow controller 9, second high accuracy mass flow controller 10 respectively with controller
24 connect.
Sampling probe 13 is provided with coarse filtration net.
It is additionally provided with emission-control equipment after gaseous mixture evacuation port 2, sample gas evacuation port 19.
Invention has been described above, it is clear that the present invention implements and is not subject to the restrictions described above, only
The method design of the present invention be have employed and the various improvement that carry out of technical scheme, or the most improved directly apply to
Other occasion, all within protection scope of the present invention.
Claims (3)
1. a high accuracy dilution sampling instrument, including sampling probe (13), sample gas inlet (14), calibration
Gas entrance (15), gaseous mixture exit (1), gaseous mixture evacuation port (2), vacuum pump (20), sample gas row
Eat dishes without rice or wine (19), carrier gas entrance (18), it is characterised in that also include the second check valve (16), controller
(24), sampling probe (13) is connected with sample gas inlet (14), and calibration gas entrance (15) is single with second
Connecting to valve (16), sample gas inlet (14) is connected after being collected by pipeline with the second check valve (16) to be had
First filter (23), the first filter is divided into two-way after (23), a road be sequentially connected with vacuum pump (20),
Sample gas evacuation port (19), another road is connected with proportioning valve (21) in turn, the second high accuracy mass flow controls
Device (10), Venturi tube (12), second high accuracy mass flow controller (10) be also parallel with one with its amount
First high accuracy mass flow controller (9) of Cheng Butong, carrier gas entrance is divided into two-way after (18), a road
It is connected with the first pressure regulator valve (17), the first electromagnetic valve (22) in turn, subsequently with proportioning valve (21), the first mistake
A little connecting on pipeline between filter (23), another road is connected with the second pressure regulator valve (8), the second filtration in turn
Device (7), the second electromagnetic valve (6), be divided into again two-way by the second electromagnetic valve (6) subsequently, and a road connects the
One mass flow controller (11), is connected with Venturi tube (12) subsequently, and another road is connected with second in turn
Mass flow controller (5), the first check valve (4), Venturi tube (12), the going out of the first check valve (4)
After mouth collects by pipeline, connection has blender (3), blender (3) to be divided into again two-way to connect with gaseous mixture respectively
Outlet (1), gaseous mixture evacuation port (2) connect, and gaseous mixture exit (1) connects analytical tool, and second
Electromagnetic valve (6), the first electromagnetic valve (22), the second mass flow controller (5), the first mass flow control
Device (11), sampling probe (13), vacuum pump (20), proportioning valve (21), the first high accuracy mass flow control
Device processed (9), the second high accuracy mass flow controller (10) are connected with controller (24) respectively.
A kind of high accuracy dilution sampling instrument the most according to claim 1, it is characterised in that sampling probe
(13) coarse filtration net it is provided with.
A kind of high accuracy dilution sampling instrument the most according to claim 1, it is characterised in that gaseous mixture is arranged
Eat dishes without rice or wine (2), sample gas evacuation port is additionally provided with emission-control equipment after (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610627314.3A CN106018014A (en) | 2016-07-29 | 2016-07-29 | High precision dilution sampling instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610627314.3A CN106018014A (en) | 2016-07-29 | 2016-07-29 | High precision dilution sampling instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106018014A true CN106018014A (en) | 2016-10-12 |
Family
ID=57133832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610627314.3A Pending CN106018014A (en) | 2016-07-29 | 2016-07-29 | High precision dilution sampling instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106018014A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879896A (en) * | 2020-07-15 | 2020-11-03 | 北京市计量检测科学研究院(北京市能源计量监测中心) | Odor measuring instrument, odor measuring method and device |
| CN112782357A (en) * | 2020-12-22 | 2021-05-11 | 汉威科技集团股份有限公司 | Automatic calibration method and device for gas sensor |
-
2016
- 2016-07-29 CN CN201610627314.3A patent/CN106018014A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879896A (en) * | 2020-07-15 | 2020-11-03 | 北京市计量检测科学研究院(北京市能源计量监测中心) | Odor measuring instrument, odor measuring method and device |
| CN112782357A (en) * | 2020-12-22 | 2021-05-11 | 汉威科技集团股份有限公司 | Automatic calibration method and device for gas sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9389152B2 (en) | Exhaust gas sampling apparatus | |
| CN105929443B (en) | Actively any method for adjusting precipitation rate of radon and Effective Decay Constant | |
| CN104364630A (en) | Exhaust gas dilution device | |
| US7565846B2 (en) | Particulate sampler and dilution gas flow device arrangement for an exhaust sampling system | |
| US8813582B1 (en) | Dilution and sampling system | |
| US20050087028A1 (en) | A multi-point sampling method for obtaining isokinetic fluid composition flows in a non-uniform velocity flow field | |
| CN106018014A (en) | High precision dilution sampling instrument | |
| CN205538547U (en) | Engine exhaust part flows particulate matter measuring device | |
| CN105334278A (en) | Gas inlet end trace gas controller for gas chromatograph | |
| CN104677696B (en) | A kind of isokinetic sampling's rifle | |
| CN206609782U (en) | A kind of edaphon respiration measuring device | |
| CN104729891A (en) | PM2.5 (Particulate Matter 2.5) source analyzing and sampling device based on carbon dioxide concentration control | |
| CN111141885A (en) | Automatic detection device and detection method for gas mercury detector | |
| CN105642144B (en) | A kind of general dilution process and device | |
| CN207366326U (en) | Gas sampling dynamic dilution system | |
| CN210269762U (en) | Automatic detection device for gas mercury detector | |
| EP2354779B1 (en) | Particulate matter measurement device | |
| CN207336479U (en) | Mobile gas tester calibrating apparatus | |
| CN201408136Y (en) | Motor particle discharge secondary dilution and part flow dilution sampling constant-current device | |
| CN109187382A (en) | Measure the method and apparatus of chromium content | |
| CN202049074U (en) | Gas sampling valve plate device | |
| CN205580823U (en) | Dilute sample thief | |
| CN201173888Y (en) | Detection system for cigarette flue gas aerosol | |
| CN108554207B (en) | Low-concentration standard gas continuous generation device and generation method thereof | |
| CN209639768U (en) | A kind of new type section flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161012 |
|
| WD01 | Invention patent application deemed withdrawn after publication |