CN215005160U - Gas-saving device for gas chromatography - Google Patents
Gas-saving device for gas chromatography Download PDFInfo
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- CN215005160U CN215005160U CN202120710153.0U CN202120710153U CN215005160U CN 215005160 U CN215005160 U CN 215005160U CN 202120710153 U CN202120710153 U CN 202120710153U CN 215005160 U CN215005160 U CN 215005160U
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Abstract
The utility model discloses a gas chromatography gas saving device, include: a gas-carrying cylinder, a gas purifier, a regulating valve and a flowmeter, wherein one side of the top of the gas-carrying cylinder is fixedly connected with a pressure reducing valve through a pipeline, one end of the pressure reducing valve, which is far away from the gas carrying bottle, is fixedly connected with a gas purifier through a pipe joint, one end of a gas outlet of the gas purifier is fixedly connected with a pressure gauge through a pipe joint, one end of the regulating valve is fixedly connected with a flowmeter through a pipeline, after the gas chromatograph is closed for half an hour, at the moment, the equipment is in a pre-running state, the regulating valve is closed, the control valve on the shunt pipe is closed, the shunt outlet is closed, the sample injection needle performs sample injection, the control regulating valve is opened after the purging time is reached, the shunt outlet starts to use the purging flow, after the time is saved when the carrier gas arrives, the carrier gas sweeps the sample inlet by controlling the flow of the regulating valve, and the flow of the carrier gas is smaller than the sweeping flow, so that the carrier gas can be saved.
Description
Technical Field
The utility model relates to a gas chromatograph technical field specifically is a gas chromatography gas saving device.
Background
The gas chromatograph is a conventional laboratory analyzer, and the gas chromatography is a chromatographic analysis method using gas as a mobile phase and is mainly used for separating and analyzing volatile substances. Gas chromatography has become one of the most important separation and analysis methods, and is widely applied in the fields of medicine and health, petrochemical industry, environmental monitoring, biochemistry and the like. The gas chromatograph has: high sensitivity, high efficiency, high selectivity, fast analysis speed, less sample amount, wide application range and the like.
The gas chromatograph technology is developed rapidly, and the equipment is updated and iterated. The gas chromatograph is durable and stable equipment, the purchase cost is high, and how to improve the performance of old equipment by additionally arranging a convenient device is urgent need of vast users.
At present, the gas chromatograph of HP-5890 type or 6890N type is used in many laboratories, and the gas chromatograph of this type is old relatively in technology, does not have the carrier gas and saves the mode, and carrier gas resource consumption is more. With the development of economy, the price of carrier gas rises dramatically, especially helium, which is up to several thousand yuan per bottle. How to save the amount of carrier gas by some convenient technical improvement is very necessary for saving the cost of the laboratory.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a gas chromatography gas saving device to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a gas chromatograph gas-saving device comprising: the gas carrier comprises a gas carrier cylinder, a gas purifier, a regulating valve and a flowmeter, wherein one side of the top of the gas carrier cylinder is provided with a pressure reducing valve through a pipeline fixedly connected with, one end of the pressure reducing valve is far away from the gas carrier cylinder and is provided with a gas purifier through a pipeline joint fixedly connected with pressure gauge, one end of the gas purifier is provided with a pressure gauge through a pipeline joint fixedly connected with, one end of the pressure gauge is provided with a tee joint fixedly connected with, one end of the tee joint is provided with a regulating valve through a pipeline fixedly connected with, one end of the regulating valve is provided with a flowmeter through a pipeline fixedly connected with, one end of the flowmeter is provided with a sample inlet through a pipeline fixedly connected with, one end of the top of the sample inlet is provided with a purging pipe through a pipeline joint fixedly connected with, and one side of the lower half part of the sample inlet is provided with a shunt pipe through a pipeline joint fixedly connected with.
Furthermore, one end of the tee joint, which is far away from the pressure gauge and one end of the regulating valve, is fixedly connected with a tail blowing pipe and a filling column flow pipe through a three-way pipe.
Furthermore, a flow control valve is fixedly connected to the purging pipe through a pipe joint.
Furthermore, a flow control valve is fixedly connected to the shunt pipe through a pipe joint.
Further, the regulating valve is an electric regulating valve.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a governing valve that sets up, flowmeter and shunt tubes, realized when gas device is used to gas chromatography saving, high-pressure gas in the carrier gas bottle passes through the decompression back of relief pressure valve, purify in entering into the gas purification ware, guarantee the stability of analysis result, close half an hour after gas chromatograph, equipment is in the running state in advance this moment, the governing valve is closed, control valve on the shunt tubes is closed, make the branch export close, the injection needle advances the appearance, reach and sweep the time after, the control governing valve is opened, the branch export begins to use and sweeps the flow, arrive and sweep the carrier gas and save the time after, flow through the control governing valve, make the carrier gas sweep the introduction port, carrier gas flow ratio sweeps the flow this moment is little, thereby can save the carrier gas. Meanwhile, in the shunting mode, under the condition of large shunting ratio: under the pre-operation, the shunt outlet is opened to use the shunt flow, and after the set time is reached, the flow of the regulating valve is controlled, so that the flow display flow is smaller than the shunt flow, the gas is saved, the flow of the shunt outlet is changed only under the two conditions, the flow of the column is unchanged, the retention time is not affected, the carrier gas is saved, and the accuracy of an analysis result is ensured.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1-a gas carrying bottle; 2-a pressure reducing valve; 3-a gas purifier; 4-a pressure gauge; 5-a tee joint; 6-adjusting the valve; 7-a flow meter; 8-a sample inlet; 9-a purge tube; 10-shunt tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a gas chromatograph gas-saving device comprising: the gas carrier comprises a gas carrier bottle 1, a gas purifier 3, a regulating valve 6 and a flowmeter 7, wherein one side of the top of the gas carrier bottle 1 is fixedly connected with a pressure reducing valve 2 through a pipeline, one end of the pressure reducing valve 2, which is far away from the gas carrier bottle 1, is fixedly connected with the gas purifier 3 through a pipe joint, one end of the gas outlet of the gas purifier 3 is fixedly connected with a pressure gauge 4 through a pipe joint, one end of the gas outlet of the pressure gauge 4 is fixedly connected with a tee joint 5, one end of the tee joint 5 is fixedly connected with the regulating valve 6 through a pipeline, one end of the regulating valve 6 is fixedly connected with a flow meter 7 through a pipeline, one end of the flow meter 7 is fixedly connected with a sample inlet 8 through a pipeline, one end of the top of the sample inlet 8 is fixedly connected with a purging pipe 9 through a pipe joint, one side of the lower half part of the sample inlet 8 is fixedly connected with a shunt pipe 10 through a pipe joint, one end of the tee joint 5, which is far away from the pressure gauge 4 and one end of the regulating valve 6 is fixedly connected with a tail blowing pipe and a filling column flow pipe through a tee joint, the purging pipe 9 is fixedly connected with a flow control valve through a pipe joint, the shunt pipe 10 is fixedly connected with a flow control valve through a pipe joint, and the regulating valve 6 is an electric regulating valve.
The working principle is as follows: when the gas-saving device for gas chromatography is used, high-pressure gas in a gas-carrying cylinder enters a gas purifier 3 for purification after being decompressed by a decompression valve 2, the stability of an analysis result is ensured, the device is in a pre-operation state after a gas chromatograph is closed for half an hour, the regulating valve 6 is closed, a control valve on a shunt pipe 10 is closed, a shunt outlet is closed, a sample injection needle is used for sample injection, after the purging time is up, the control regulating valve 6 is opened, the shunt outlet starts to use the purging flow, after the carrier gas is reached and the time is saved, the flow of the regulating valve 6 is controlled, so that the carrier gas purges the sample injection port, the carrier gas flow is smaller than the purging flow at the moment, and the carrier gas can be saved. Meanwhile, in the shunting mode, under the condition of large shunting ratio: under the pre-operation, the shunt outlet is opened to use the shunt flow, and after the set time is reached, the flow of the regulating valve 6 is controlled, so that the flow 7 displays that the flow is smaller than the shunt flow, thereby saving the gas, the flow of the shunt outlet is changed only under the two conditions, the flow of the column is unchanged, the retention time is not influenced, the carrier gas is saved, and the accuracy of the analysis result is ensured.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A gas saving device for gas chromatography is characterized by comprising:
a gas-carrying cylinder (1);
a gas purifier (3);
a regulating valve (6);
a flow meter (7) for measuring the flow rate of the fluid,
wherein one side of the top of the gas carrying bottle (1) is fixedly connected with a pressure reducing valve (2) through a pipeline, one end of the pressure reducing valve (2) far away from the gas carrying bottle (1) is fixedly connected with a gas purifier (3) through a pipe joint, one end of the air outlet of the gas purifier (3) is fixedly connected with a pressure gauge (4) through a pipe joint, one end of the air outlet of the pressure gauge (4) is fixedly connected with a tee joint (5), one end of the tee joint (5) is fixedly connected with an adjusting valve (6) through a pipeline, one end of the regulating valve (6) is fixedly connected with a flowmeter (7) through a pipeline, one end of the flowmeter (7) is fixedly connected with a sample inlet (8) through a pipeline, one end of the top of the sample inlet (8) is fixedly connected with a purging pipe (9) through a pipe joint, one side of the lower half part of the sample inlet (8) is fixedly connected with a shunt pipe (10) through a pipe joint.
2. The gas-saving device for gas chromatography according to claim 1, wherein: one end of the tee joint (5) far away from the pressure gauge (4) and one end of the regulating valve (6) are fixedly connected with a tail blowing pipe and a filling column flow pipe through a three-way pipe.
3. The gas-saving device for gas chromatography according to claim 1, wherein: and the purging pipe (9) is fixedly connected with a flow control valve through a pipe joint.
4. The gas-saving device for gas chromatography according to claim 1, wherein: the shunt pipe (10) is fixedly connected with a flow control valve through a pipe joint.
5. The gas-saving device for gas chromatography according to claim 1, wherein: the regulating valve (6) is an electric regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120710153.0U CN215005160U (en) | 2021-04-08 | 2021-04-08 | Gas-saving device for gas chromatography |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120710153.0U CN215005160U (en) | 2021-04-08 | 2021-04-08 | Gas-saving device for gas chromatography |
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| CN215005160U true CN215005160U (en) | 2021-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047276A (en) * | 2022-01-17 | 2022-02-15 | 华谱科仪(北京)科技有限公司 | Chromatograph control method and device |
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2021
- 2021-04-08 CN CN202120710153.0U patent/CN215005160U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047276A (en) * | 2022-01-17 | 2022-02-15 | 华谱科仪(北京)科技有限公司 | Chromatograph control method and device |
| CN114047276B (en) * | 2022-01-17 | 2022-04-15 | 华谱科仪(北京)科技有限公司 | Chromatograph control method and device |
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