CN204027887U - A kind of adjustable extraction-type dilution sampling instrument - Google Patents
A kind of adjustable extraction-type dilution sampling instrument Download PDFInfo
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- CN204027887U CN204027887U CN201420483922.8U CN201420483922U CN204027887U CN 204027887 U CN204027887 U CN 204027887U CN 201420483922 U CN201420483922 U CN 201420483922U CN 204027887 U CN204027887 U CN 204027887U
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Abstract
The utility model discloses a kind of adjustable extraction-type dilution sampling instrument, relate to sampling instrument field, described dilution sampling instrument is made up of sampling probe, observing and controlling gas circuit and control system; Described observing and controlling gas circuit comprises: sampling gas circuit, calibration gas circuit, blowback gas circuit and dilution gas circuit; The utility model have employed external diluting and sampling system, is convenient to later maintenance, simple to operate; By have employed proportioning valve, kapillary and differential pressure transmitter by Dynamic controlling pressure reduction to regulate sample gas, ensure sample gas flow speed stability; Carrier gas adopts mass flow controller to regulate flow velocity, ensures dilution precision and adjustable extension rate; And the utility model have employed the design of 2 tunnel dilution gas circuit series connection, improves the scope that extension rate is adjustable arbitrarily.
Description
Technical field
The utility model relates to sampling instrument field, particularly relates to a kind of adjustable extraction-type dilution sampling instrument.
Background technology
Along with the development of modern industry, the production and development of all kinds of chemicals, atmospheric pollution is more and more serious, and it is also more and more serious as the pollution of the foul gas of one of atmospheric pollution, the impact of foul gas on the life of people and production is also more and more obvious, and current odor pollution occupy second in the large public hazards in the world seven.The industry that petrochemical complex, pharmacy and rubber etc. much produce peculiar smell all needs to monitor continuously foul gas, foul gas excessive concentration in general aiutage, the sensor used in on-line computing model has respective sensing range, for the feature that pollution source gas concentration is too high, possibly desired data information cannot be obtained.
Realizing in process of the present utility model, finding at least there is following shortcoming and defect in prior art:
1) conventional is dilution sampling feeler lever technology, and adopt the principle of critical hole current limliting, all parts and pipeline are all integrated in feeler lever, and this technology can only realize a kind of fixed dilution multiple, and later maintenance is poor, and dilution ratio is difficult to accurate control;
2) current domestic publication number is CN201548535U, and publication date is in the patent on August 11st, 2010: utilize critical-sampled device to limit sample gas flow velocity, can only realize single extension rate, and dilution ratio precision is difficult to obtain and control.
Utility model content
The utility model provides a kind of adjustable extraction-type dilution sampling instrument, and the utility model, by coutroi velocity, achieves from main control dilution ratio, improves the efficiency and precision of dilution, described below:
A kind of adjustable extraction-type dilution sampling instrument, described dilution sampling instrument is made up of sampling probe, observing and controlling gas circuit and control system; Described observing and controlling gas circuit comprises: sampling gas circuit, calibration gas circuit, blowback gas circuit and dilution gas circuit;
Described sampling gas circuit is by described sampling probe, sample gas access port connects the first filtrator, sample gas is through vacuum pump drainage, sample segment gas is discharged from sample gas evacuation port, another part sample gas is through proportioning valve, kapillary, by the value control ratio valve of differential pressure transmitter, after obtaining stable differential pressure, enter into Venturi tube;
Described calibration gas circuit is by calibration gas access port, retaining valve connects the first filtrator, partial collimation gas is through vacuum pump, discharge from sample gas evacuation port, another part calibration gas is through proportioning valve, kapillary, by the value control ratio valve of differential pressure transmitter, after obtaining stable differential pressure, enter into Venturi tube;
Described blowback gas circuit is by carrier gas access port, connect the first pressure regulator valve, first solenoid valve, part blowback air is through the first filtrator, sample gas access port, sampling probe is discharged, and another part blowback air is through proportioning valve, kapillary, by the value control ratio valve of differential pressure pick-up, after obtaining stable differential pressure, enter into Venturi tube;
Described dilution gas circuit, by carrier gas access port, connects the second pressure regulator valve, the second filtrator, the second solenoid valve, through the first mass flow controller, mixes with sample gas or calibration gas at Venturi tube place; The pressurized air that part cleans is through the second mass flow controller, and retaining valve mixes at mixer place with the combination gas of Venturi tube, and part combination gas is discharged through combination gas evacuation port, and another part enters analytical instrument by combination gas exit.
Described control system is with described sampling probe, described vacuum pump, described proportioning valve, described differential pressure transmitter, described first solenoid valve, described second solenoid valve, be electrically connected between described first mass flow controller and described second mass flow controller.
The beneficial effect of the technical scheme that the utility model provides is:
The utility model have employed external diluting and sampling system, is convenient to later maintenance, simple to operate; By have employed proportioning valve, kapillary and differential pressure transmitter by Dynamic controlling pressure reduction to regulate sample gas, ensure sample gas flow speed stability; Carrier gas adopts mass flow controller to regulate flow velocity, ensures dilution precision and adjustable extension rate; And the utility model have employed the design of 2 tunnel dilution gas circuit series connection, improves the scope that extension rate is adjustable arbitrarily.
Accompanying drawing explanation
Fig. 1 be adjustable extraction-type dilution sampling instrument each parts between connection diagram;
Fig. 2 is the connection diagram between control system and each parts.
In accompanying drawing, the list of parts representated by each label is as follows:
1: calibration gas access port; 2: retaining valve;
3: sampling probe; 4: sample gas access port;
5: the first filtrators; 6: the first pressure regulator valves;
7: the first solenoid valves; 8: proportioning valve;
9: kapillary; 10: differential pressure transmitter;
11: carrier gas access port; 12: the second pressure regulator valves;
13: the second filtrators; 14: the second solenoid valves;
15: the first mass flow controllers; 16: Venturi tube;
17: the second mass flow controllers; 18: retaining valve;
19: mixer; 20: combination gas evacuation port;
21: mixer exit; 22: vacuum pump;
23: sample gas evacuation port; 24: control system.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below the utility model embodiment is described in further detail.
In order in sampling process, ensure flow speed stability, from main control dilution ratio, improve the efficiency and precision of dilution, later maintenance is good, and see Fig. 1 and Fig. 2, the utility model embodiment proposes a kind of adjustable extraction-type dilution sampling instrument, it is by probe segment, and observing and controlling gas circuit and control system 24 are formed.
Wherein, probe segment is specially in the present embodiment: sampling probe 3, and sampling probe 3 comprises: sampling pipe, filtrator, calandria, mounting flange sleeve and protective cover.This sampling probe 3 is conventionally known to one of skill in the art, and therefore not to repeat here.
Observing and controlling gas circuit comprises: sampling gas circuit, calibration gas circuit, blowback gas circuit and dilution gas circuit, be described in detail below in conjunction with accompanying drawing 1.
Sampling gas circuit is by sampling probe 3, sample gas access port 4 connects the first filtrator 5, sample gas is through vacuum pump 22 drainage, sample segment gas is discharged from sample gas evacuation port 23, another part sample gas is through proportioning valve 8, kapillary 9, by the value control ratio valve 8 of differential pressure transmitter 10, after obtaining stable differential pressure, enter into Venturi tube 16;
Calibration gas circuit is by calibration gas access port 1, retaining valve 2 connects the first filtrator 5, partial collimation gas is through vacuum pump 22, discharge from sample gas evacuation port 23, another part calibration gas is through proportioning valve 8, kapillary 9, by the value control ratio valve 8 of differential pressure transmitter 10, after obtaining stable differential pressure, enter into Venturi tube 16;
Blowback gas circuit uses clean pressurized air by carrier gas access port 11, connect the first pressure regulator valve 6, first solenoid valve 7, part blowback air is through the first filtrator 5, sample gas access port 4, sampling probe 3 is discharged, and another part blowback air is through proportioning valve 8, kapillary 9, by the value control ratio valve 8 of differential pressure pick-up 10, after obtaining stable differential pressure, enter into Venturi tube 16;
Dilution gas circuit uses clean pressurized air by carrier gas access port 11, connects the second pressure regulator valve 12, second filtrator 13, second solenoid valve 14, through the first mass flow controller 15, mixes with sample gas or calibration gas at Venturi tube 16 place; The pressurized air that part cleans can be passed through the second mass flow controller 17, retaining valve 18 mixes at mixer 19 place with the combination gas of Venturi tube 16, part combination gas is discharged through combination gas evacuation port 20, and another part enters analytical instrument by combination gas exit 21;
See Fig. 2, control system 24 is with sampling probe 3, vacuum pump 22, proportioning valve 8, be electrically connected between differential pressure transmitter 10, first solenoid valve 7, second solenoid valve 14, first mass flow controller 15 and the second mass flow controller 17, and control system 24 controls the opening and closing of above-mentioned device.
Below the specific implementation method of adjustable extraction-type dilution sampling instrument is described:
Start control system 24, namely start sampling probe 3, vacuum pump 22, proportioning valve 8, differential pressure transmitter 10, first solenoid valve 7, second solenoid valve 14, first mass flow controller 15 and the second mass flow controller 17.
When starting sampling dilution function, control vacuum pump 22 and carry out sample, sample gas is by sampling probe 3, sample gas access port 4 connects the first filtrator 5, sample segment gas is discharged from sample gas evacuation port 23 by vacuum pump 22, another part sample gas, through proportioning valve 8, kapillary 9, by the value control ratio valve 8 of differential pressure transmitter 10, enters into Venturi tube 16 after obtaining stable differential pressure; Clean pressurized air, by carrier gas access port 11, connects pressure regulator valve 12, second filtrator 13, second solenoid valve 14, after the adjustment of the first mass flow controller 15, mixes with sample gas at Venturi tube 16 place; The pressurized air that another part cleans is by the adjustment of the second mass flow controller 17, through retaining valve 18 and Venturi tube 16 combination gas mixer 19 place carry out fully mixing namely obtain diluting after sample gas, part of dilution sample gas is discharged through combination gas evacuation port 20, and another part enters analytical instrument by combination gas exit 21 and detects;
When starting calibration function, control vacuum pump 22 and carry out calibration gas sampling, calibration gas is by calibration gas access port 1, retaining valve 2 connects filtrator 5, partial collimation gas is discharged from evacuation port 23 by vacuum pump 22, another part calibration gas, through proportioning valve 8, kapillary 9, enters into Venturi tube 16 after obtaining stable differential pressure by the value control ratio valve 8 of differential pressure pick-up 10; Clean pressurized air is by carrier gas access port 11, and connect pressure regulator valve 12, filtrator 13, the second solenoid valve 14, after the adjustment of the first mass flow controller 15, mixes at Venturi tube 16 place with calibration gas; The pressurized air that another part cleans is by the adjustment of the second mass flow controller 17, through retaining valve 18 and Venturi tube 16 combination gas mixer 19 place carry out fully mixing namely obtain diluting after gas, part combination gas is discharged through combination gas evacuation port 20, and another part enters analytical instrument by combination gas exit 21 and detects;
When starting blowing function, use clean pressurized air to connect carrier gas access port 11, pressurized air for cleaning sample gas circuit, a part of pressurized air through pressure regulator valve 6, the first solenoid valve 7, filtrator 5, sample gas access port 4, sampling probe 3 is discharged; Another part pressurized air enters into Venturi tube 16 after proportioning valve 8, kapillary 9; Mix in Venturi tube 16 with dilution pressurized air, to reach the object of clean sampling gas circuit.
The utility model embodiment is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (2)
1. an adjustable extraction-type dilution sampling instrument, described dilution sampling instrument is made up of sampling probe, observing and controlling gas circuit and control system; Described observing and controlling gas circuit comprises: sampling gas circuit, calibration gas circuit, blowback gas circuit and dilution gas circuit; It is characterized in that,
Described sampling gas circuit is by described sampling probe, sample gas access port connects the first filtrator, sample gas is through vacuum pump drainage, sample segment gas is discharged from sample gas evacuation port, another part sample gas is through proportioning valve, kapillary, by the value control ratio valve of differential pressure transmitter, after obtaining stable differential pressure, enter into Venturi tube;
Described calibration gas circuit is by calibration gas access port, retaining valve connects the first filtrator, partial collimation gas is through vacuum pump, discharge from sample gas evacuation port, another part calibration gas is through proportioning valve, kapillary, by the value control ratio valve of differential pressure transmitter, after obtaining stable differential pressure, enter into Venturi tube;
Described blowback gas circuit is by carrier gas access port, connect the first pressure regulator valve, first solenoid valve, part blowback air is through the first filtrator, sample gas access port, sampling probe is discharged, and another part blowback air is through proportioning valve, kapillary, by the value control ratio valve of differential pressure pick-up, after obtaining stable differential pressure, enter into Venturi tube;
Described dilution gas circuit, by carrier gas access port, connects the second pressure regulator valve, the second filtrator, the second solenoid valve, through the first mass flow controller, mixes with sample gas or calibration gas at Venturi tube place; The pressurized air that part cleans is through the second mass flow controller, and retaining valve mixes at mixer place with the combination gas of Venturi tube, and part combination gas is discharged through combination gas evacuation port, and another part enters analytical instrument by combination gas exit.
2. one according to claim 1 adjustable extraction-type dilution sampling instrument, it is characterized in that, described control system is with described sampling probe, described vacuum pump, described proportioning valve, described differential pressure transmitter, described first solenoid valve, described second solenoid valve, be electrically connected between described first mass flow controller and described second mass flow controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420483922.8U CN204027887U (en) | 2014-08-26 | 2014-08-26 | A kind of adjustable extraction-type dilution sampling instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420483922.8U CN204027887U (en) | 2014-08-26 | 2014-08-26 | A kind of adjustable extraction-type dilution sampling instrument |
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| CN204027887U true CN204027887U (en) | 2014-12-17 |
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| CN201420483922.8U Expired - Fee Related CN204027887U (en) | 2014-08-26 | 2014-08-26 | A kind of adjustable extraction-type dilution sampling instrument |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500910A (en) * | 2016-12-02 | 2017-03-15 | 山东中检高科检测技术有限公司 | A kind of vacuometer dynamic contrast calibrating installation |
| CN107192791A (en) * | 2017-05-16 | 2017-09-22 | 湖北锐意自控系统有限公司 | A kind of gas analyzing apparatus and method |
| CN109682986A (en) * | 2019-02-18 | 2019-04-26 | 哈尔滨天龙仪器制造有限公司 | A kind of device for sampling quantitative gas capable of washing |
| CN110261540A (en) * | 2019-04-01 | 2019-09-20 | 南京安荣信电子科技有限公司 | Gaseous pollutant sampling probe and its application method with motoring condition switching valve |
| CN110530814A (en) * | 2019-09-19 | 2019-12-03 | 华能国际电力股份有限公司 | A kind of gas sample measuring system and its application method |
| CN112730781A (en) * | 2020-12-24 | 2021-04-30 | 北京林业大学 | System for continuously measuring stable water isotope value of forest ecological system in situ |
-
2014
- 2014-08-26 CN CN201420483922.8U patent/CN204027887U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500910A (en) * | 2016-12-02 | 2017-03-15 | 山东中检高科检测技术有限公司 | A kind of vacuometer dynamic contrast calibrating installation |
| CN107192791A (en) * | 2017-05-16 | 2017-09-22 | 湖北锐意自控系统有限公司 | A kind of gas analyzing apparatus and method |
| CN109682986A (en) * | 2019-02-18 | 2019-04-26 | 哈尔滨天龙仪器制造有限公司 | A kind of device for sampling quantitative gas capable of washing |
| CN110261540A (en) * | 2019-04-01 | 2019-09-20 | 南京安荣信电子科技有限公司 | Gaseous pollutant sampling probe and its application method with motoring condition switching valve |
| CN110530814A (en) * | 2019-09-19 | 2019-12-03 | 华能国际电力股份有限公司 | A kind of gas sample measuring system and its application method |
| CN110530814B (en) * | 2019-09-19 | 2023-08-22 | 华能国际电力股份有限公司 | Gas sampling and measuring system and application method thereof |
| CN112730781A (en) * | 2020-12-24 | 2021-04-30 | 北京林业大学 | System for continuously measuring stable water isotope value of forest ecological system in situ |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20170826 |