CN216051046U - Gas diluting device - Google Patents
Gas diluting device Download PDFInfo
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- CN216051046U CN216051046U CN202122031814.XU CN202122031814U CN216051046U CN 216051046 U CN216051046 U CN 216051046U CN 202122031814 U CN202122031814 U CN 202122031814U CN 216051046 U CN216051046 U CN 216051046U
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Abstract
The utility model relates to a gas diluting device, which comprises a gas conveying unit to be diluted, a diluted gas conveying unit and a gas mixing unit, wherein the diluted gas conveying unit is connected with the gas mixing unit; the gas conveying unit to be diluted comprises a standard gas inlet pipeline, a sample gas inlet pipeline, an inlet main pipeline and a three-way valve, wherein the standard gas inlet pipeline and the sample gas inlet pipeline are connected with the inlet main pipeline through the three-way valve, the inlet main pipeline is connected with the gas mixing unit, and the three-way valve selects standard gas or sample gas to enter the gas mixing unit in a selecting mode each time; the diluent gas conveying unit comprises a diluent gas inlet pipeline, and the diluent gas inlet pipeline is connected with the gas mixing unit. According to the utility model, the standard gas or the sample gas is selected to enter the gas mixing unit in an alternative mode every time, and is mixed and diluted with the diluent gas in the gas mixing unit, so that the free switching between the standard gas and the sample gas can be realized, the real-time updating of the sample gas is ensured, and the sample residue is reduced, thereby ensuring the real-time performance of gas detection.
Description
Technical Field
The utility model relates to the technical field of gas online detection, in particular to a gas diluting device.
Background
In the environmental testing and exploration industries, sample testing of gases is an essential part. The gas dilution device is used as a pre-step of gas detection, and the prior art of the gas dilution device is mainly used for diluting standard gas and further serving for manufacturing a standard curve for a gas chromatograph. However, the standard gas is generally a steel cylinder gas, the components are stable, the existing gas diluting device cannot dilute the sample gas which changes in real time, and further real-time data of the sample gas is difficult to detect in the actual detection process.
Therefore, it is necessary to design a gas dilution device that can act on both the standard gas and the sample gas that changes in real time.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the utility model is to overcome the problem that the sample gas changing in real time cannot be diluted and detected in the prior art.
In order to solve the above technical problem, the present invention provides a gas dilution device, including: the device comprises a to-be-diluted gas conveying unit, a diluted gas conveying unit and a gas mixing unit;
the gas conveying unit to be diluted comprises a standard gas inlet pipeline, a sample gas inlet pipeline, a gas inlet main pipeline and a three-way valve, wherein the standard gas inlet pipeline and the sample gas inlet pipeline are connected with the gas inlet main pipeline through the three-way valve, the gas inlet main pipeline is connected with the gas mixing unit, and the three-way valve selects standard gas or sample gas to enter the gas mixing unit in a one-way mode each time;
the diluent gas conveying unit comprises a diluent gas inlet pipeline, and the diluent gas inlet pipeline is connected with the gas mixing unit;
the gas mixing unit comprises a gas mixing cavity and a mixed gas discharge pipeline, and the mixed gas discharge pipeline is connected with the gas mixing cavity.
In one embodiment of the present invention, the sample gas inlet line includes a sample gas first channel, a sample gas second channel, a sample gas third channel, a sample gas fourth channel, and a sample gas fifth channel, and the sample gas third channel is connected to the three-way valve.
In one embodiment of the present invention, a three-way joint is disposed on the sample gas inlet pipeline, and the sample gas second channel, the sample gas third channel and the sample gas fourth channel are connected by the three-way joint.
In an embodiment of the present invention, a suction pump is disposed on the sample gas inlet pipeline, and the suction pump connects the sample gas first channel and the sample gas second channel.
In one embodiment of the present invention, a back pressure valve is disposed on the sample gas inlet pipeline, and the back pressure valve connects the sample gas fourth channel and the sample gas fifth channel.
In one embodiment of the utility model, the main gas intake conduit comprises a first main conduit channel and a second main conduit channel, the second main conduit channel being connected to the gas mixing chamber.
In one embodiment of the utility model, a first mass flow meter is arranged on the air inlet main pipeline, and the first mass flow meter is connected with the main pipeline first channel and the main pipeline second channel.
In one embodiment of the utility model, the diluent gas inlet line comprises a diluent gas first passage, a diluent gas second passage and a diluent gas third passage, the diluent gas third passage being connected to the gas mixing chamber.
In one embodiment of the utility model, a pressure maintaining valve and a second mass flow meter are arranged on the diluent gas inlet pipeline, the pressure maintaining valve is connected with the diluent gas first channel and the diluent gas second channel, and the second mass flow meter is connected with the diluent gas second channel and the diluent gas third channel.
In one embodiment of the utility model, the gas mixing chamber is provided with a mixing chamber sweep gas release line.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
according to the utility model, the standard gas or the sample gas is selected to enter the gas mixing unit in an alternative mode every time, and is mixed and diluted with the diluent gas in the gas mixing unit, so that the free switching between the standard gas and the sample gas can be realized, the real-time updating of the sample gas is ensured, and the sample residue is reduced, thereby ensuring the real-time property of gas detection.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of a specific arrangement of the present invention.
The specification reference numbers indicate: 1. a standard gas inlet line; 2. a sample gas inlet line; 201. a standard gas first passage; 202. a standard gas second passage; 203. a sample gas third channel; 204. a fourth channel for sample gas; 205. a fifth channel for sample gas; 3. a diluent gas inlet line; 301. a diluent gas first passage; 302. a diluent gas second passage; 303. a diluent gas third passage; 4. an air pump; 5. a three-way joint; 6. a three-way valve; 701. a first mass flow meter; 702. a second mass flow meter; 8. a main intake air line; 801. a main pipeline first channel; 802. a main pipeline second channel; 9. a back pressure valve; 10. a pressure maintaining valve; 11. a gas mixing chamber; 12. a mixing chamber residual gas release pipeline; 13. a mixed gas discharge pipeline.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1 and 2, the present invention provides a gas dilution device, including: a to-be-diluted gas delivery unit, a diluted gas delivery unit and a gas mixing unit.
The gas conveying unit to be diluted comprises a standard gas inlet pipeline 1, a sample gas inlet pipeline 2, a gas inlet main pipeline 8 and a three-way valve 6, wherein the standard gas inlet pipeline 1 and the sample gas inlet pipeline 2 are connected with the gas inlet main pipeline 8 through the three-way valve 6, and the gas inlet main pipeline 8 is connected with the gas mixing unit. Wherein the three-way valve 6 selects a standard gas or a sample gas to enter the gas mixing unit in an alternative manner each time.
The diluent gas conveying unit comprises a diluent gas inlet pipeline 3, the diluent gas inlet pipeline 3 is connected with the gas mixing unit, and the diluent gas is used for diluting the sample to be diluted so as to meet the detection requirement.
The gas mixing unit includes gas mixing chamber 11 and mist discharge pipeline 13, and mist discharge pipeline 13 is connected with gas mixing chamber 11, and gas mixing chamber 11 is used for the mixture and the buffering of standard gas and sample gas and diluent gas, prevents that the diluent gas flow is too big and treats that the diluent gas flow is too little to hold back the pipeline. The other end of the mixed gas discharge pipeline 13 is connected with a gas chromatograph to complete the detection of the gas to be diluted.
The sample gas inlet pipeline 2 comprises a sample gas first channel 201, a sample gas second channel 202, a sample gas third channel 203, a sample gas fourth channel 204 and a sample gas fifth channel 205, wherein the sample gas third channel 203 is connected with the three-way valve 6.
The sample gas inlet pipeline 2 is provided with a three-way joint 5, the sample gas second channel 202, the sample gas third channel 203 and the sample gas fourth channel 204 are connected through the three-way joint 5, and the three-way joint 5 is ensured to be tightly attached to each channel without air leakage.
The sample gas inlet pipeline 2 is provided with a suction pump 4, and the suction pump 4 is connected with a sample gas first channel 201 and a sample gas second channel 202. The main function of the pump 4 is to pump the sample gas at a certain flow rate to the gas mixing chamber 11 for dilution.
A back pressure valve 9 is arranged on the sample gas inlet pipeline 2, and the back pressure valve 9 is connected with the sample gas fourth channel 204 and the sample gas fifth channel 205. The back pressure valve 9 is used to provide a steady pressure to the first mass flow meter 701 and to evacuate excess sample gas.
The main gas intake conduit 8 comprises a first main conduit channel 801 and a second main conduit channel 802, the second main conduit channel 802 being connected to the gas mixing chamber 11.
The intake main pipe 8 is provided with a first mass flow meter 701, and the first mass flow meter 701 connects a main pipe first passage 801 and a main pipe second passage 802. The first mass flow meter 701 is used to set the gas flow rate of the gas into the gas mixing chamber 11.
The diluent gas inlet line 3 includes a diluent gas first passage 301, a diluent gas second passage 302, and a diluent gas third passage 303, and the diluent gas third passage 303 is connected to the gas mixing chamber 11.
A pressure stabilizing valve 10 and a second mass flow meter 702 are arranged on the diluent gas pipeline, the pressure stabilizing valve 10 is connected with the diluent gas first channel 301 and the diluent gas second channel 302, and the second mass flow meter 702 is connected with the diluent gas second channel 302 and the diluent gas third channel 303. The pressure maintaining valve 10 is used to regulate the pressure of the diluent gas to meet the demand.
The gas mixing chamber 11 is provided with a mixing chamber sweep gas release line 12. The mixing chamber residual gas releasing pipeline 12 is used for discharging redundant mixed gas to ensure the freshness of the mixed gas, thereby further meeting the accuracy.
According to the utility model, the standard gas or the sample gas is selected to enter the gas mixing unit in an alternative mode every time, and is mixed and diluted with the diluent gas in the gas mixing unit, so that the free switching between the standard gas and the sample gas can be realized, the real-time updating of the sample gas is ensured, and the sample residue is reduced, thereby ensuring the real-time property of gas detection.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (10)
1. A gas dilution apparatus, comprising: the device comprises a to-be-diluted gas conveying unit, a diluted gas conveying unit and a gas mixing unit;
the gas conveying unit to be diluted comprises a standard gas inlet pipeline, a sample gas inlet pipeline, a gas inlet main pipeline and a three-way valve, wherein the standard gas inlet pipeline and the sample gas inlet pipeline are connected with the gas inlet main pipeline through the three-way valve, the gas inlet main pipeline is connected with the gas mixing unit, and the three-way valve selects standard gas or sample gas to enter the gas mixing unit in a one-way mode each time;
the diluent gas conveying unit comprises a diluent gas inlet pipeline, and the diluent gas inlet pipeline is connected with the gas mixing unit;
the gas mixing unit comprises a gas mixing cavity and a mixed gas discharge pipeline, and the mixed gas discharge pipeline is connected with the gas mixing cavity.
2. The gas dilution apparatus of claim 1, wherein: the sample gas inlet pipeline comprises a sample gas first channel, a sample gas second channel, a sample gas third channel, a sample gas fourth channel and a sample gas fifth channel, and the sample gas third channel is connected with the three-way valve.
3. The gas dilution apparatus of claim 2, wherein: the sample gas inlet pipeline is provided with a three-way joint, and the sample gas second channel, the sample gas third channel and the sample gas fourth channel are connected through the three-way joint.
4. The gas dilution apparatus of claim 2, wherein: and the sample gas inlet pipeline is provided with a suction pump, and the suction pump is connected with the sample gas first channel and the sample gas second channel.
5. The gas dilution apparatus of claim 2, wherein: and a back pressure valve is arranged on the sample gas inlet pipeline and is connected with the sample gas fourth channel and the sample gas fifth channel.
6. The gas dilution apparatus of claim 1, wherein: the air inlet main pipeline comprises a main pipeline first channel and a main pipeline second channel, and the main pipeline second channel is connected with the gas mixing cavity.
7. The gas dilution apparatus of claim 6, wherein: and a first mass flow meter is arranged on the air inlet main pipeline and is connected with the main pipeline first channel and the main pipeline second channel.
8. The gas dilution apparatus of claim 1, wherein: the diluent gas inlet pipeline comprises a diluent gas first channel, a diluent gas second channel and a diluent gas third channel, and the diluent gas third channel is connected with the gas mixing cavity.
9. The gas dilution apparatus of claim 8, wherein: and the diluent gas inlet pipeline is provided with a pressure stabilizing valve and a second mass flow meter, the pressure stabilizing valve is connected with the diluent gas first channel and the diluent gas second channel, and the second mass flow meter is connected with the diluent gas second channel and the diluent gas third channel.
10. The gas dilution apparatus of claim 1, wherein: the gas mixing cavity is provided with a mixing cavity residual gas release pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122031814.XU CN216051046U (en) | 2021-08-26 | 2021-08-26 | Gas diluting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122031814.XU CN216051046U (en) | 2021-08-26 | 2021-08-26 | Gas diluting device |
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| CN216051046U true CN216051046U (en) | 2022-03-15 |
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| CN202122031814.XU Active CN216051046U (en) | 2021-08-26 | 2021-08-26 | Gas diluting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115508482A (en) * | 2022-09-19 | 2022-12-23 | 四川省科源工程技术测试中心 | Gas chromatograph gas combination device for high-sulfur-content gas |
-
2021
- 2021-08-26 CN CN202122031814.XU patent/CN216051046U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115508482A (en) * | 2022-09-19 | 2022-12-23 | 四川省科源工程技术测试中心 | Gas chromatograph gas combination device for high-sulfur-content gas |
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