CN109991365A - Gas measurement device - Google Patents
Gas measurement device Download PDFInfo
- Publication number
- CN109991365A CN109991365A CN201711491207.3A CN201711491207A CN109991365A CN 109991365 A CN109991365 A CN 109991365A CN 201711491207 A CN201711491207 A CN 201711491207A CN 109991365 A CN109991365 A CN 109991365A
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- Prior art keywords
- gas
- sampling
- branch
- negative pressure
- main road
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- 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
- G01N1/2273—Atmospheric sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
- G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure, temperature
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Biomedical Technology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention provides gas measurement devices, belong to gas analysis and field of measuring technique, gas measurement device includes sample lines and the exhaust device that is arranged in sample lines, the sample lines are equipped with the gas analyzer for measuring under test gas, the sample lines include the sampling branch for sampling main road and being connected on sampling main road, sampling branch is communicated with the atmosphere far from sampling main road one end, the exhaust device setting is on sampling main road, the gas analyzer setting is on sampling branch road, sampling branch road is equipped with for providing the supercharging device of positive pressure detection gas to gas analyzer, the under test gas at gas analyzer air inlet is become micro-positive pressure by setting supercharging device on sampling branch road, solve the problems, such as that it is easy to damage to be placed in high negative pressure state for gas analyzer in the prior art.
Description
Technical field
The present invention relates to gas measurement devices.
Background technique
The regions such as pit coal goaf, closed need to carry out gas componant and content analysis regularly, and common method is
By the way of beam tube, the gas in region to be measured is extracted at gas analyzer by vacuum pump and is analyzed, distance is from several hundred
Rice is differed to several kilometers.In this case vacuum pump front end will form relatively high negative pressure, if gas analyzer is arranged in very
Sky pump front end, certainly will will cause inside analyzer is high negative pressure state, can be to electrochemistry in analyzer etc. intolerant to the sensing of negative pressure
The damage of device.
Summary of the invention
The purpose of the present invention is to provide a kind of gas measurement devices, are placed in height to solve gas analyzer in the prior art
Negative pressure state problem easy to damage.
To achieve the above object, the technical solution of gas measurement device of the invention is:
1, gas measurement device includes sample lines and the exhaust device that is arranged in sample lines, and the sample lines are equipped with
For measuring the gas analyzer of under test gas, the sample lines include the sampling for sampling main road and being connected on sampling main road
Branch, sampling branch are communicated with the atmosphere far from sampling main road one end, and the exhaust device setting is on sampling main road, the gas
On sampling branch road, sampling branch road is equipped with for providing the pressurization dress of positive pressure detection gas to gas analyzer for analyzer setting
It sets.
The beneficial effects of the present invention are: setting supercharging device will be to be measured at gas analyzer air inlet on sampling branch road
Gas becomes micro-positive pressure, solves the problems, such as that it is easy to damage to be placed in high negative pressure state for gas analyzer in the prior art.
2, on the basis of 1, sampling branch road is connected with for being shorted supercharging device when negative pressure measures
One negative pressure measures branch, and sampling branch road is also connected in negative pressure measurement for leading the gas outlet of gas analyzer and sampling
Second negative pressure of road connection measures branch, and the part for measuring branch circuit parallel connection with the second negative pressure on the sampling main road is equipped with gas supply
The check valve that body is flowed to exhaust device makes the gas measurement device can be realized positive pressure measurement pattern and negative pressure measurement pattern.
3, on the basis of 2, the first negative pressure measurement branch is connected with to be surveyed for switching supercharging device and the first negative pressure
It measures branch and samples the first reversal valve of main road connected state, the second negative pressure measurement branch is connected with for switching gas point
Analyzer gas outlet is connected to the second reversal valve of the second negative pressure measurement branch, extraneous connected state, convenient for positive pressure measurement pattern
With the switching of negative pressure measurement pattern.
4, on the basis of 3, first reversal valve and the second reversal valve are two position three way directional control valve.
5, it on the basis of 1, is connected on the sampling main road for measuring branch with the negative pressure of sampling branch circuit parallel connection, is born
The both ends of pressure measurement branch are connected to measurement main road, are sampled and are supplied on main road for being equipped with the part of negative pressure measurement branch circuit parallel connection
The check valve that gas is flowed to exhaust device controls simpler.
6, on the basis of any one of 1-5, the exhaust device is pump drainage vacuum pump.
7, on the basis of 6, the pump drainage vacuum pump, which has, is not more than setting value for guaranteeing to sample negative pressure in main road
Safety valve avoids the negative pressure in sample lines excessive.
8, on the basis of any one of 1-5, the supercharging device is booster vacuum pump.
9, on the basis of any one of 1-5, the rated power of the exhaust device is greater than the rated power of supercharging device,
A small amount of gas is set to be passed through gas analyzer.
10, on the basis of any one of 1-5, the sampling main road is equipped with the flowmeter on front side of sampling branch,
The flow of the under test gas in sampling main road is flowed into convenient for detection.
Detailed description of the invention
Fig. 1 is the schematic diagram of the positive pressure measurement pattern of the specific embodiment 1 of gas measurement device of the invention；
Fig. 2 is the schematic diagram of the negative pressure measurement pattern of the specific embodiment 1 of gas measurement device of the invention；
Fig. 3 is the structural schematic diagram of the specific embodiment 2 of gas measurement device of the invention；
Fig. 4 is the structural schematic diagram of the specific embodiment 3 of gas measurement device of the invention；
Fig. 5 is the structural schematic diagram of the specific embodiment 4 of gas measurement device of the invention；
Fig. 6 is the structural schematic diagram of the specific embodiment 5 of gas measurement device of the invention；
Fig. 7 is the structural schematic diagram of the specific embodiment 6 of gas measurement device of the invention.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment 1 of gas measurement device of the invention, as shown in Figure 1 to Figure 2, gas-detecting device include with to
It surveys the sampling main road 1 of the air inlet connection of gas and under test gas is pumped into the pump drainage vacuum pump 8 in sampling main road 1, sampling master
It is connected with sampling bypass 2 on road 1, samples the part for being placed in 2 front side of sampling bypass on main road 1 equipped with flowmeter 7, convenient for detection
Flow into the flow of the under test gas in sampling branch.Wherein, pump drainage vacuum pump 8 constitutes exhaust device.
Gas measurement device of the invention further includes a gas analyzer 5, which can be to flowing through wherein
Gas analyzed and detected, the inlet on gas analyzer 5 is connected with the first negative pressure measurement branch 13 and pressure piping
3, pressure piping 3 be equipped with a booster vacuum pump 11, the entrance of pressure piping 3, the first negative pressure measurement branch 13 entrance and
It samples and is equipped with the first reversal valve 9 between bypass 2, controlled for the ease of the switching to gas circuit, therefore first in the present embodiment
Reversal valve 9 uses two position three way directional control valve, two two logical reversal valves wherein one be sampling bypass 2 and pressure piping 3 company
Logical position, another one are the connection position for sampling bypass 2 and the first negative pressure measurement branch 13.Wherein, the composition of booster vacuum pump 11 is used for
The supercharging device of positive pressure detection gas is provided to gas analyzer 5.Certainly, in other embodiments, supercharging device can be one
A air pump, and in the upper check valve of air pump front end series connection.
The exit of gas analyzer 5 be additionally provided with the second negative pressure for connect of sampling main road 1 measure branch 12 and with the external world
The emptying pipeline 4 of connection, empty pipeline 4 entrance, the second negative pressure measurement branch 12 entrance and gas analyzer 5 outlet it
Between be equipped with the second reversal valve 10, second reversal valve 10 still using and the specification of the same race of the first reversal valve 9 two-position three way commutate
Valve, a wherein outlet for gas analyzer 5 for second reversal valve 10 measure the company of the entrance of branch 12 with the second negative pressure
Logical position, another one be to be connected to the outlet of gas analyzer 5 to be connected to position with empty pipeline 4.Wherein, bypass 2, pressure piping are sampled
3 and emptying pipeline 4 constitute sampling branch, sampling main road 1 and sampling branch constitute sample lines.
The sampling main road 1 sampled between the outlet of the entrance and the second negative pressure measurement branch 12 of bypass 2 is equipped with check valve
6, and the spool of check valve 6 is arranged towards the outlet of pump drainage vacuum pump 8, enable gas by check valve 6 from sampling bypass 2
Entrance to the direction of pump drainage vacuum pump 8 flow.
Positive pressure measurement pattern and negative pressure measurement pattern may be implemented in gas measurement device of the invention, and can be realized just
Press the switching of measurement pattern and negative pressure measurement pattern, for the ease of the switching of both of which, the first reversal valve 9 and the second reversal valve
10 are all made of electromagnetism to control its commutation.Certainly, in other embodiments, the first reversal valve 9 and the second reversal valve 10 can also
To be controlled using fluid power.
When gas measurement device of the invention is in positive pressure measurement pattern, the first reversal valve 9 of control makes 3 He of pressure piping
It samples bypass 2 to be connected to, the second reversal valve 10 of control is connected to the outlet of gas analyzer 5 with emptying pipeline 4, at this time under test gas
Pass through flowmeter 7 from sampling main road 1 under the action of pump drainage vacuum pump 8 from when the outflow of flowmeter 7, under test gas a part is logical
Over-sampling main road 1 is extracted out by pump drainage vacuum pump 8, and a part enters pressure piping 3 from the entrance of sampling bypass 2, then passes through pressurization
Pipeline 3 enters gas analyzer 5 and is then discharged from emptying pipeline 4, at this point, since therefore gas is communicated with the atmosphere in emptying pipeline 4
The exit of analyzer 5 is atmospheric pressure, and the entrance of gas analyzer 5 is in high negative pressure state, and booster vacuum pump 11 works, and is made
The pressure of the inlet of gas analyzer 5 is gradually increased, when the pressure of the inlet of gas analyzer 5 is more than gas analyzer 5
Exit atmospheric pressure i.e. when reaching slight positive pressure state, at this point, under test gas begins flow through gas analyzer 5, so as to gas
Analyzer 5 analyzes under test gas.
When gas measurement device of the invention is in negative pressure measurement pattern, the first reversal valve 9 of control surveys the first negative pressure
Amount branch 13 is connected to sampling bypass 2 and is shorted booster vacuum pump 11, and the second reversal valve 10 of control makes the outlet of gas analyzer 5
It is connected to the second negative pressure measurement branch 12, under test gas at this time flows in sampling main road 1 under the action of pump drainage vacuum pump 8
Dynamic, the outlet for sampling the entrance and the second negative pressure measurement branch 12 of bypass 2 at this time is high negative pressure state, but since sampling is led
The setting of check valve 6 on road 1 will make the pressure for the entrance for sampling bypass 2 be greater than going out for the second negative pressure measurement branch 12
The pressure of mouth just can guarantee the unlatching of check valve 6, and sub-fraction under test gas initially enters sampling bypass 2 at this time, then flow through
Gas analyzer 5, so that gas analyzer 5 analyzes under test gas.
The advantages of positive pressure measurement pattern and negative pressure measurement pattern respectively have advantage and disadvantage, positive pressure measurement pattern is: flowing through gas
The gas of body analyzer 5 is slight positive pressure state, guarantees that the sensor of the electrochemical type of installation is not damaged；Positive pressure measurement pattern
The shortcomings that be: limitation of the gas flow of gas coming through analyzer 5 by 11 ability to work of booster vacuum pump, and being pressurized true
Sky pump 11 ability to work will limit its flow, keep its response time long, thus gas analyzer 5 measurement response time compared with
It is long, and booster vacuum pump 11 needs work always, consumes more electric energy.The advantages of negative pressure measurement pattern, is: gas coming through
The gas flow of analyzer 5 not will receive the limitation of booster vacuum pump 11, and flow is larger, and gas analyzer 5 measures the response time
It is shorter, and booster vacuum pump 11 does not work, and saves electric energy；The shortcomings that negative pressure measurement pattern, is: gas coming through analyzer 5 at this time
Gas be high negative pressure state, have certain damage to the sensor of the electrochemical type in gas analyzer 5.
Preferably, pump drainage vacuum pump 8 is to guarantee that be extracted into negative pressure is not more than with negative pressure regulatory function and safety valve and set
Definite value.
The specific embodiment 2 of gas measurement device of the invention, the specific embodiment 1 with gas measurement device of the invention
Difference be only that: as shown in figure 3, supercharging device is equipped with air pump 211 and the check valve 210 of 211 inlet of air pump is arranged in.
The specific embodiment 3 of gas measurement device of the invention, the specific embodiment 1 with gas measurement device of the invention
Difference be only that: as shown in figure 4, exhaust device includes air pump 381 and the check valve 382 that 381 inlet of air pump is arranged in.
The specific embodiment 4 of gas measurement device of the invention, the specific embodiment 1 with gas measurement device of the invention
Difference be only that: as shown in figure 5, pressure piping and the first negative pressure measurement branch road be respectively equipped with an inlet stop valve 49,
Emptying pipeline and the second negative pressure measurement branch road are respectively equipped with one outlet shut-off valve 410.
The specific embodiment 5 of gas measurement device of the invention, the specific embodiment 1 with gas measurement device of the invention
Difference be only that: as shown in fig. 6, the sampling main road 51 being placed between sampling 52 entrance and exit of bypass is always in connected state
State.
The specific embodiment 6 of gas measurement device of the invention, the specific embodiment 1 with gas measurement device of the invention
Difference be only that: it is one of to carry out positive pressure measurement pattern as shown in fig. 7, there are two gas analyzer 65 sets, another into
Row negative pressure measurement pattern.
Claims (10)
1. gas measurement device is set in the sample lines including sample lines and the exhaust device being arranged in sample lines
There is the gas analyzer for measuring under test gas, it is characterised in that: the sample lines include sampling main road and being connected to adopt
Sampling branch on sample main road, sampling branch are communicated with the atmosphere far from sampling main road one end, and the exhaust device setting is sampling
On main road, on sampling branch road, sampling branch road is equipped with for providing positive pressure to gas analyzer for the gas analyzer setting
The supercharging device of detection gas.
2. gas measurement device according to claim 1, it is characterised in that: the sampling branch road is connected with for negative
Pressure measurement when by supercharging device be shorted the first negative pressure measure branch, sampling branch road be also connected with negative pressure measurement when for will
The second negative pressure that the gas outlet of gas analyzer is connected to sampling main road measures branch, surveys on the sampling main road with the second negative pressure
The part of amount branch circuit parallel connection is equipped with the check valve that supplied gas is flowed to exhaust device.
3. gas measurement device according to claim 2, it is characterised in that: the first negative pressure measurement branch connection is useful
In switching supercharging device and the first negative pressure measurement branch and the first reversal valve for sampling main road connected state, second negative pressure is surveyed
Amount branch is connected with the second commutation for switching gas analyzer gas outlet and the second negative pressure measurement branch, extraneous connected state
Valve connection.
4. gas measurement device according to claim 3, it is characterised in that: first reversal valve and the second reversal valve are equal
For two position three way directional control valve.
5. gas measurement device according to claim 1, it is characterised in that: be connected on the sampling main road for adopt
The negative pressure measurement branch of sample branch circuit parallel connection, the both ends of negative pressure measurement branch are connected to measurement main road, are sampled and are used for and bear on main road
The part of pressure measurement branch circuit parallel connection is equipped with the check valve that supplied gas is flowed to exhaust device.
6. gas measurement device according to any one of claims 1-5, it is characterised in that: the exhaust device is pump drainage
Vacuum pump.
7. gas measurement device according to claim 6, it is characterised in that: the pump drainage vacuum pump has for guaranteeing to adopt
Negative pressure is not more than the safety valve of setting value in sample pipeline.
8. gas measurement device according to any one of claims 1-5, it is characterised in that: the supercharging device is pressurization
Vacuum pump.
9. gas measurement device according to any one of claims 1-5, it is characterised in that: the exhaust device it is specified
Power is greater than the rated power of supercharging device.
10. gas measurement device according to any one of claims 1-5, it is characterised in that: set on the sampling main road
There is the flowmeter on front side of sampling branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711491207.3A CN109991365A (en) | 2017-12-30 | 2017-12-30 | Gas measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711491207.3A CN109991365A (en) | 2017-12-30 | 2017-12-30 | Gas measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109991365A true CN109991365A (en) | 2019-07-09 |
Family
ID=67110085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711491207.3A Pending CN109991365A (en) | 2017-12-30 | 2017-12-30 | Gas measurement device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109991365A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112631142A (en) * | 2020-12-31 | 2021-04-09 | 珠海格力电器股份有限公司 | Electric cooker, and control method and control device thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806679A (en) * | 2010-04-16 | 2010-08-18 | 宁夏电力公司电力科学研究院 | Flue gas sampling device |
| CN201983961U (en) * | 2011-03-25 | 2011-09-21 | 昆明醋酸纤维有限公司 | Negative pressure sampling analytical system for gas analyzer |
| CN104502161A (en) * | 2014-12-31 | 2015-04-08 | 郑州光力科技股份有限公司 | Calibration equipment of dust sampler |
| CN105527134A (en) * | 2016-01-07 | 2016-04-27 | 淄博祥龙测控技术有限公司 | Positive-pressure sampling pump station for sampling system |
| CN107449868A (en) * | 2017-08-29 | 2017-12-08 | 广东上风环保科技有限公司 | A kind of atmospheric monitoring system |
| CN207675736U (en) * | 2017-12-30 | 2018-07-31 | 光力科技股份有限公司 | A kind of gas measurement device |
-
2017
- 2017-12-30 CN CN201711491207.3A patent/CN109991365A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806679A (en) * | 2010-04-16 | 2010-08-18 | 宁夏电力公司电力科学研究院 | Flue gas sampling device |
| CN201983961U (en) * | 2011-03-25 | 2011-09-21 | 昆明醋酸纤维有限公司 | Negative pressure sampling analytical system for gas analyzer |
| CN104502161A (en) * | 2014-12-31 | 2015-04-08 | 郑州光力科技股份有限公司 | Calibration equipment of dust sampler |
| CN105527134A (en) * | 2016-01-07 | 2016-04-27 | 淄博祥龙测控技术有限公司 | Positive-pressure sampling pump station for sampling system |
| CN107449868A (en) * | 2017-08-29 | 2017-12-08 | 广东上风环保科技有限公司 | A kind of atmospheric monitoring system |
| CN207675736U (en) * | 2017-12-30 | 2018-07-31 | 光力科技股份有限公司 | A kind of gas measurement device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112631142A (en) * | 2020-12-31 | 2021-04-09 | 珠海格力电器股份有限公司 | Electric cooker, and control method and control device thereof |
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